Skip to content

K
kernel_linux

OpenHarmony / kernel_linux
上一次同步 4 年多

通知 15
Star 8
Fork 2
K
kernel_linux
提交 7e92daae 编写于 作者: L Linus Torvalds
浏览文件
操作

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull perf update from Ingo Molnar:
 "Lots of changes in this cycle as well, with hundreds of commits from
  over 30 contributors.  Most of the activity was on the tooling side.

  Higher level changes:

   - New 'perf kvm' analysis tool, from Xiao Guangrong.

   - New 'perf trace' system-wide tracing tool

   - uprobes fixes + cleanups from Oleg Nesterov.

   - Lots of patches to make perf build on Android out of box, from
     Irina Tirdea

   - Extend ftrace function tracing utility to be more dynamic for its
     users.  It allows for data passing to the callback functions, as
     well as reading regs as if a breakpoint were to trigger at function
     entry.

     The main goal of this patch series was to allow kprobes to use
     ftrace as an optimized probe point when a probe is placed on an
     ftrace nop.  With lots of help from Masami Hiramatsu, and going
     through lots of iterations, we finally came up with a good
     solution.

   - Add cpumask for uncore pmu, use it in 'stat', from Yan, Zheng.

   - Various tracing updates from Steve Rostedt

   - Clean up and improve 'perf sched' performance by elliminating lots
     of needless calls to libtraceevent.

   - Event group parsing support, from Jiri Olsa

   - UI/gtk refactorings and improvements from Namhyung Kim

   - Add support for non-tracepoint events in perf script python, from
     Feng Tang

   - Add --symbols to 'script', similar to the one in 'report', from
     Feng Tang.

  Infrastructure enhancements and fixes:

   - Convert the trace builtins to use the growing evsel/evlist
     tracepoint infrastructure, removing several open coded constructs
     like switch like series of strcmp to dispatch events, etc.
     Basically what had already been showcased in 'perf sched'.

   - Add evsel constructor for tracepoints, that uses libtraceevent just
     to parse the /format events file, use it in a new 'perf test' to
     make sure the libtraceevent format parsing regressions can be more
     readily caught.

   - Some strange errors were happening in some builds, but not on the
     next, reported by several people, problem was some parser related
     files, generated during the build, didn't had proper make deps, fix
     from Eric Sandeen.

   - Introduce struct and cache information about the environment where
     a perf.data file was captured, from Namhyung Kim.

   - Fix handling of unresolved samples when --symbols is used in
     'report', from Feng Tang.

   - Add union member access support to 'probe', from Hyeoncheol Lee.

   - Fixups to die() removal, from Namhyung Kim.

   - Render fixes for the TUI, from Namhyung Kim.

   - Don't enable annotation in non symbolic view, from Namhyung Kim.

   - Fix pipe mode in 'report', from Namhyung Kim.

   - Move related stats code from stat to util/, will be used by the
     'stat' kvm tool, from Xiao Guangrong.

   - Remove die()/exit() calls from several tools.

   - Resolve vdso callchains, from Jiri Olsa

   - Don't pass const char pointers to basename, so that we can
     unconditionally use libgen.h and thus avoid ifdef BIONIC lines,
     from David Ahern

   - Refactor hist formatting so that it can be reused with the GTK
     browser, From Namhyung Kim

   - Fix build for another rbtree.c change, from Adrian Hunter.

   - Make 'perf diff' command work with evsel hists, from Jiri Olsa.

   - Use the only field_sep var that is set up: symbol_conf.field_sep,
     fix from Jiri Olsa.

   - .gitignore compiled python binaries, from Namhyung Kim.

   - Get rid of die() in more libtraceevent places, from Namhyung Kim.

   - Rename libtraceevent 'private' struct member to 'priv' so that it
     works in C++, from Steven Rostedt

   - Remove lots of exit()/die() calls from tools so that the main perf
     exit routine can take place, from David Ahern

   - Fix x86 build on x86-64, from David Ahern.

   - {int,str,rb}list fixes from Suzuki K Poulose

   - perf.data header fixes from Namhyung Kim

   - Allow user to indicate objdump path, needed in cross environments,
     from Maciek Borzecki

   - Fix hardware cache event name generation, fix from Jiri Olsa

   - Add round trip test for sw, hw and cache event names, catching the
     problem Jiri fixed, after Jiri's patch, the test passes
     successfully.

   - Clean target should do clean for lib/traceevent too, fix from David
     Ahern

   - Check the right variable for allocation failure, fix from Namhyung
     Kim

   - Set up evsel->tp_format regardless of evsel->name being set
     already, fix from Namhyung Kim

   - Oprofile fixes from Robert Richter.

   - Remove perf_event_attr needless version inflation, from Jiri Olsa

   - Introduce libtraceevent strerror like error reporting facility,
     from Namhyung Kim

   - Add pmu mappings to perf.data header and use event names from cmd
     line, from Robert Richter

   - Fix include order for bison/flex-generated C files, from Ben
     Hutchings

   - Build fixes and documentation corrections from David Ahern

   - Assorted cleanups from Robert Richter

   - Let O= makes handle relative paths, from Steven Rostedt

   - perf script python fixes, from Feng Tang.

   - Initial bash completion support, from Frederic Weisbecker

   - Allow building without libelf, from Namhyung Kim.

   - Support DWARF CFI based unwind to have callchains when %bp based
     unwinding is not possible, from Jiri Olsa.

   - Symbol resolution fixes, while fixing support PPC64 files with an
     .opt ELF section was the end goal, several fixes for code that
     handles all architectures and cleanups are included, from Cody
     Schafer.

   - Assorted fixes for Documentation and build in 32 bit, from Robert
     Richter

   - Cache the libtraceevent event_format associated to each evsel
     early, so that we avoid relookups, i.e.  calling pevent_find_event
     repeatedly when processing tracepoint events.

     [ This is to reduce the surface contact with libtraceevents and
        make clear what is that the perf tools needs from that lib: so
        far parsing the common and per event fields.  ]

   - Don't stop the build if the audit libraries are not installed, fix
     from Namhyung Kim.

   - Fix bfd.h/libbfd detection with recent binutils, from Markus
     Trippelsdorf.

   - Improve warning message when libunwind devel packages not present,
     from Jiri Olsa"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (282 commits)
  perf trace: Add aliases for some syscalls
  perf probe: Print an enum type variable in "enum variable-name" format when showing accessible variables
  perf tools: Check libaudit availability for perf-trace builtin
  perf hists: Add missing period_* fields when collapsing a hist entry
  perf trace: New tool
  perf evsel: Export the event_format constructor
  perf evsel: Introduce rawptr() method
  perf tools: Use perf_evsel__newtp in the event parser
  perf evsel: The tracepoint constructor should store sys:name
  perf evlist: Introduce set_filter() method
  perf evlist: Renane set_filters method to apply_filters
  perf test: Add test to check we correctly parse and match syscall open parms
  perf evsel: Handle endianity in intval method
  perf evsel: Know if byte swap is needed
  perf tools: Allow handling a NULL cpu_map as meaning "all cpus"
  perf evsel: Improve tracepoint constructor setup
  tools lib traceevent: Fix error path on pevent_parse_event
  perf test: Fix build failure
  trace: Move trace event enable from fs_initcall to core_initcall
  tracing: Add an option for disabling markers
  ...
上级 7a682942 1d787d37
展开全部 隐藏空白更改
内联 并排
Showing with 13242 addition and 5240 deletion
Makefile
浏览文件 @ 7e92daae
......@@ -609,7 +609,11 @@ KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
endif
ifdef CONFIG_FUNCTION_TRACER
KBUILD_CFLAGS += -pg
ifdef CONFIG_HAVE_FENTRY
CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
endif
KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
KBUILD_AFLAGS += $(CC_USING_FENTRY)
ifdef CONFIG_DYNAMIC_FTRACE
ifdef CONFIG_HAVE_C_RECORDMCOUNT
BUILD_C_RECORDMCOUNT := y
......
arch/Kconfig
浏览文件 @ 7e92daae
......@@ -222,6 +222,19 @@ config HAVE_PERF_EVENTS_NMI
subsystem. Also has support for calculating CPU cycle events
to determine how many clock cycles in a given period.
config HAVE_PERF_REGS
bool
help
Support selective register dumps for perf events. This includes
bit-mapping of each registers and a unique architecture id.
config HAVE_PERF_USER_STACK_DUMP
bool
help
Support user stack dumps for perf event samples. This needs
access to the user stack pointer which is not unified across
architectures.
config HAVE_ARCH_JUMP_LABEL
bool
......
arch/x86/Kconfig
浏览文件 @ 7e92daae
......@@ -36,6 +36,7 @@ config X86
select HAVE_KRETPROBES
select HAVE_OPTPROBES
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FENTRY if X86_64
select HAVE_C_RECORDMCOUNT
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_TRACER
......@@ -60,6 +61,8 @@ config X86
select HAVE_MIXED_BREAKPOINTS_REGS
select PERF_EVENTS
select HAVE_PERF_EVENTS_NMI
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select ANON_INODES
select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
select HAVE_CMPXCHG_LOCAL if !M386
......
arch/x86/include/asm/ftrace.h
浏览文件 @ 7e92daae
......@@ -3,38 +3,54 @@
#ifdef __ASSEMBLY__
.macro MCOUNT_SAVE_FRAME
/* taken from glibc */
subq $0x38, %rsp
movq %rax, (%rsp)
movq %rcx, 8(%rsp)
movq %rdx, 16(%rsp)
movq %rsi, 24(%rsp)
movq %rdi, 32(%rsp)
movq %r8, 40(%rsp)
movq %r9, 48(%rsp)
/* skip is set if the stack was already partially adjusted */
.macro MCOUNT_SAVE_FRAME skip=0
/*
* We add enough stack to save all regs.
*/
subq $(SS+8-\skip), %rsp
movq %rax, RAX(%rsp)
movq %rcx, RCX(%rsp)
movq %rdx, RDX(%rsp)
movq %rsi, RSI(%rsp)
movq %rdi, RDI(%rsp)
movq %r8, R8(%rsp)
movq %r9, R9(%rsp)
/* Move RIP to its proper location */
movq SS+8(%rsp), %rdx
movq %rdx, RIP(%rsp)
.endm
.macro MCOUNT_RESTORE_FRAME
movq 48(%rsp), %r9
movq 40(%rsp), %r8
movq 32(%rsp), %rdi
movq 24(%rsp), %rsi
movq 16(%rsp), %rdx
movq 8(%rsp), %rcx
movq (%rsp), %rax
addq $0x38, %rsp
.macro MCOUNT_RESTORE_FRAME skip=0
movq R9(%rsp), %r9
movq R8(%rsp), %r8
movq RDI(%rsp), %rdi
movq RSI(%rsp), %rsi
movq RDX(%rsp), %rdx
movq RCX(%rsp), %rcx
movq RAX(%rsp), %rax
addq $(SS+8-\skip), %rsp
.endm
#endif
#ifdef CONFIG_FUNCTION_TRACER
#define MCOUNT_ADDR ((long)(mcount))
#ifdef CC_USING_FENTRY
# define MCOUNT_ADDR ((long)(__fentry__))
#else
# define MCOUNT_ADDR ((long)(mcount))
#endif
#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
#ifdef CONFIG_DYNAMIC_FTRACE
#define ARCH_SUPPORTS_FTRACE_OPS 1
#define ARCH_SUPPORTS_FTRACE_SAVE_REGS
#endif
#ifndef __ASSEMBLY__
extern void mcount(void);
extern atomic_t modifying_ftrace_code;
extern void __fentry__(void);
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
......
arch/x86/include/asm/kprobes.h
浏览文件 @ 7e92daae
......@@ -27,6 +27,7 @@
#include <asm/insn.h>
#define __ARCH_WANT_KPROBES_INSN_SLOT
#define ARCH_SUPPORTS_KPROBES_ON_FTRACE
struct pt_regs;
struct kprobe;
......
arch/x86/include/asm/kvm.h
浏览文件 @ 7e92daae
......@@ -9,6 +9,22 @@
#include <linux/types.h>
#include <linux/ioctl.h>
#define DE_VECTOR 0
#define DB_VECTOR 1
#define BP_VECTOR 3
#define OF_VECTOR 4
#define BR_VECTOR 5
#define UD_VECTOR 6
#define NM_VECTOR 7
#define DF_VECTOR 8
#define TS_VECTOR 10
#define NP_VECTOR 11
#define SS_VECTOR 12
#define GP_VECTOR 13
#define PF_VECTOR 14
#define MF_VECTOR 16
#define MC_VECTOR 18
/* Select x86 specific features in <linux/kvm.h> */
#define __KVM_HAVE_PIT
#define __KVM_HAVE_IOAPIC
......
arch/x86/include/asm/kvm_host.h
浏览文件 @ 7e92daae
......@@ -75,22 +75,6 @@
#define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
#define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
#define DE_VECTOR 0
#define DB_VECTOR 1
#define BP_VECTOR 3
#define OF_VECTOR 4
#define BR_VECTOR 5
#define UD_VECTOR 6
#define NM_VECTOR 7
#define DF_VECTOR 8
#define TS_VECTOR 10
#define NP_VECTOR 11
#define SS_VECTOR 12
#define GP_VECTOR 13
#define PF_VECTOR 14
#define MF_VECTOR 16
#define MC_VECTOR 18
#define SELECTOR_TI_MASK (1 << 2)
#define SELECTOR_RPL_MASK 0x03
......
arch/x86/include/asm/perf_event.h
浏览文件 @ 7e92daae
......@@ -262,4 +262,6 @@ static inline void perf_check_microcode(void) { }
static inline void amd_pmu_disable_virt(void) { }
#endif
#define arch_perf_out_copy_user copy_from_user_nmi
#endif /* _ASM_X86_PERF_EVENT_H */
arch/x86/include/asm/perf_regs.h 0 → 100644
浏览文件 @ 7e92daae
#ifndef _ASM_X86_PERF_REGS_H
#define _ASM_X86_PERF_REGS_H
enum perf_event_x86_regs {
PERF_REG_X86_AX,
PERF_REG_X86_BX,
PERF_REG_X86_CX,
PERF_REG_X86_DX,
PERF_REG_X86_SI,
PERF_REG_X86_DI,
PERF_REG_X86_BP,
PERF_REG_X86_SP,
PERF_REG_X86_IP,
PERF_REG_X86_FLAGS,
PERF_REG_X86_CS,
PERF_REG_X86_SS,
PERF_REG_X86_DS,
PERF_REG_X86_ES,
PERF_REG_X86_FS,
PERF_REG_X86_GS,
PERF_REG_X86_R8,
PERF_REG_X86_R9,
PERF_REG_X86_R10,
PERF_REG_X86_R11,
PERF_REG_X86_R12,
PERF_REG_X86_R13,
PERF_REG_X86_R14,
PERF_REG_X86_R15,
PERF_REG_X86_32_MAX = PERF_REG_X86_GS + 1,
PERF_REG_X86_64_MAX = PERF_REG_X86_R15 + 1,
};
#endif /* _ASM_X86_PERF_REGS_H */
arch/x86/include/asm/processor.h
浏览文件 @ 7e92daae
......@@ -759,6 +759,8 @@ static inline void update_debugctlmsr(unsigned long debugctlmsr)
wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr);
}
extern void set_task_blockstep(struct task_struct *task, bool on);
/*
* from system description table in BIOS. Mostly for MCA use, but
* others may find it useful:
......
arch/x86/include/asm/svm.h
浏览文件 @ 7e92daae
#ifndef __SVM_H
#define __SVM_H
#define SVM_EXIT_READ_CR0 0x000
#define SVM_EXIT_READ_CR3 0x003
#define SVM_EXIT_READ_CR4 0x004
#define SVM_EXIT_READ_CR8 0x008
#define SVM_EXIT_WRITE_CR0 0x010
#define SVM_EXIT_WRITE_CR3 0x013
#define SVM_EXIT_WRITE_CR4 0x014
#define SVM_EXIT_WRITE_CR8 0x018
#define SVM_EXIT_READ_DR0 0x020
#define SVM_EXIT_READ_DR1 0x021
#define SVM_EXIT_READ_DR2 0x022
#define SVM_EXIT_READ_DR3 0x023
#define SVM_EXIT_READ_DR4 0x024
#define SVM_EXIT_READ_DR5 0x025
#define SVM_EXIT_READ_DR6 0x026
#define SVM_EXIT_READ_DR7 0x027
#define SVM_EXIT_WRITE_DR0 0x030
#define SVM_EXIT_WRITE_DR1 0x031
#define SVM_EXIT_WRITE_DR2 0x032
#define SVM_EXIT_WRITE_DR3 0x033
#define SVM_EXIT_WRITE_DR4 0x034
#define SVM_EXIT_WRITE_DR5 0x035
#define SVM_EXIT_WRITE_DR6 0x036
#define SVM_EXIT_WRITE_DR7 0x037
#define SVM_EXIT_EXCP_BASE 0x040
#define SVM_EXIT_INTR 0x060
#define SVM_EXIT_NMI 0x061
#define SVM_EXIT_SMI 0x062
#define SVM_EXIT_INIT 0x063
#define SVM_EXIT_VINTR 0x064
#define SVM_EXIT_CR0_SEL_WRITE 0x065
#define SVM_EXIT_IDTR_READ 0x066
#define SVM_EXIT_GDTR_READ 0x067
#define SVM_EXIT_LDTR_READ 0x068
#define SVM_EXIT_TR_READ 0x069
#define SVM_EXIT_IDTR_WRITE 0x06a
#define SVM_EXIT_GDTR_WRITE 0x06b
#define SVM_EXIT_LDTR_WRITE 0x06c
#define SVM_EXIT_TR_WRITE 0x06d
#define SVM_EXIT_RDTSC 0x06e
#define SVM_EXIT_RDPMC 0x06f
#define SVM_EXIT_PUSHF 0x070
#define SVM_EXIT_POPF 0x071
#define SVM_EXIT_CPUID 0x072
#define SVM_EXIT_RSM 0x073
#define SVM_EXIT_IRET 0x074
#define SVM_EXIT_SWINT 0x075
#define SVM_EXIT_INVD 0x076
#define SVM_EXIT_PAUSE 0x077
#define SVM_EXIT_HLT 0x078
#define SVM_EXIT_INVLPG 0x079
#define SVM_EXIT_INVLPGA 0x07a
#define SVM_EXIT_IOIO 0x07b
#define SVM_EXIT_MSR 0x07c
#define SVM_EXIT_TASK_SWITCH 0x07d
#define SVM_EXIT_FERR_FREEZE 0x07e
#define SVM_EXIT_SHUTDOWN 0x07f
#define SVM_EXIT_VMRUN 0x080
#define SVM_EXIT_VMMCALL 0x081
#define SVM_EXIT_VMLOAD 0x082
#define SVM_EXIT_VMSAVE 0x083
#define SVM_EXIT_STGI 0x084
#define SVM_EXIT_CLGI 0x085
#define SVM_EXIT_SKINIT 0x086
#define SVM_EXIT_RDTSCP 0x087
#define SVM_EXIT_ICEBP 0x088
#define SVM_EXIT_WBINVD 0x089
#define SVM_EXIT_MONITOR 0x08a
#define SVM_EXIT_MWAIT 0x08b
#define SVM_EXIT_MWAIT_COND 0x08c
#define SVM_EXIT_XSETBV 0x08d
#define SVM_EXIT_NPF 0x400
#define SVM_EXIT_ERR -1
#define SVM_EXIT_REASONS \
{ SVM_EXIT_READ_CR0, "read_cr0" }, \
{ SVM_EXIT_READ_CR3, "read_cr3" }, \
{ SVM_EXIT_READ_CR4, "read_cr4" }, \
{ SVM_EXIT_READ_CR8, "read_cr8" }, \
{ SVM_EXIT_WRITE_CR0, "write_cr0" }, \
{ SVM_EXIT_WRITE_CR3, "write_cr3" }, \
{ SVM_EXIT_WRITE_CR4, "write_cr4" }, \
{ SVM_EXIT_WRITE_CR8, "write_cr8" }, \
{ SVM_EXIT_READ_DR0, "read_dr0" }, \
{ SVM_EXIT_READ_DR1, "read_dr1" }, \
{ SVM_EXIT_READ_DR2, "read_dr2" }, \
{ SVM_EXIT_READ_DR3, "read_dr3" }, \
{ SVM_EXIT_WRITE_DR0, "write_dr0" }, \
{ SVM_EXIT_WRITE_DR1, "write_dr1" }, \
{ SVM_EXIT_WRITE_DR2, "write_dr2" }, \
{ SVM_EXIT_WRITE_DR3, "write_dr3" }, \
{ SVM_EXIT_WRITE_DR5, "write_dr5" }, \
{ SVM_EXIT_WRITE_DR7, "write_dr7" }, \
{ SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, \
{ SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, \
{ SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, \
{ SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, \
{ SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, \
{ SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, \
{ SVM_EXIT_INTR, "interrupt" }, \
{ SVM_EXIT_NMI, "nmi" }, \
{ SVM_EXIT_SMI, "smi" }, \
{ SVM_EXIT_INIT, "init" }, \
{ SVM_EXIT_VINTR, "vintr" }, \
{ SVM_EXIT_CPUID, "cpuid" }, \
{ SVM_EXIT_INVD, "invd" }, \
{ SVM_EXIT_HLT, "hlt" }, \
{ SVM_EXIT_INVLPG, "invlpg" }, \
{ SVM_EXIT_INVLPGA, "invlpga" }, \
{ SVM_EXIT_IOIO, "io" }, \
{ SVM_EXIT_MSR, "msr" }, \
{ SVM_EXIT_TASK_SWITCH, "task_switch" }, \
{ SVM_EXIT_SHUTDOWN, "shutdown" }, \
{ SVM_EXIT_VMRUN, "vmrun" }, \
{ SVM_EXIT_VMMCALL, "hypercall" }, \
{ SVM_EXIT_VMLOAD, "vmload" }, \
{ SVM_EXIT_VMSAVE, "vmsave" }, \
{ SVM_EXIT_STGI, "stgi" }, \
{ SVM_EXIT_CLGI, "clgi" }, \
{ SVM_EXIT_SKINIT, "skinit" }, \
{ SVM_EXIT_WBINVD, "wbinvd" }, \
{ SVM_EXIT_MONITOR, "monitor" }, \
{ SVM_EXIT_MWAIT, "mwait" }, \
{ SVM_EXIT_XSETBV, "xsetbv" }, \
{ SVM_EXIT_NPF, "npf" }
#ifdef __KERNEL__
enum {
INTERCEPT_INTR,
INTERCEPT_NMI,
......@@ -264,81 +393,6 @@ struct __attribute__ ((__packed__)) vmcb {
#define SVM_EXITINFO_REG_MASK 0x0F
#define SVM_EXIT_READ_CR0 0x000
#define SVM_EXIT_READ_CR3 0x003
#define SVM_EXIT_READ_CR4 0x004
#define SVM_EXIT_READ_CR8 0x008
#define SVM_EXIT_WRITE_CR0 0x010
#define SVM_EXIT_WRITE_CR3 0x013
#define SVM_EXIT_WRITE_CR4 0x014
#define SVM_EXIT_WRITE_CR8 0x018
#define SVM_EXIT_READ_DR0 0x020
#define SVM_EXIT_READ_DR1 0x021
#define SVM_EXIT_READ_DR2 0x022
#define SVM_EXIT_READ_DR3 0x023
#define SVM_EXIT_READ_DR4 0x024
#define SVM_EXIT_READ_DR5 0x025
#define SVM_EXIT_READ_DR6 0x026
#define SVM_EXIT_READ_DR7 0x027
#define SVM_EXIT_WRITE_DR0 0x030
#define SVM_EXIT_WRITE_DR1 0x031
#define SVM_EXIT_WRITE_DR2 0x032
#define SVM_EXIT_WRITE_DR3 0x033
#define SVM_EXIT_WRITE_DR4 0x034
#define SVM_EXIT_WRITE_DR5 0x035
#define SVM_EXIT_WRITE_DR6 0x036
#define SVM_EXIT_WRITE_DR7 0x037
#define SVM_EXIT_EXCP_BASE 0x040
#define SVM_EXIT_INTR 0x060
#define SVM_EXIT_NMI 0x061
#define SVM_EXIT_SMI 0x062
#define SVM_EXIT_INIT 0x063
#define SVM_EXIT_VINTR 0x064
#define SVM_EXIT_CR0_SEL_WRITE 0x065
#define SVM_EXIT_IDTR_READ 0x066
#define SVM_EXIT_GDTR_READ 0x067
#define SVM_EXIT_LDTR_READ 0x068
#define SVM_EXIT_TR_READ 0x069
#define SVM_EXIT_IDTR_WRITE 0x06a
#define SVM_EXIT_GDTR_WRITE 0x06b
#define SVM_EXIT_LDTR_WRITE 0x06c
#define SVM_EXIT_TR_WRITE 0x06d
#define SVM_EXIT_RDTSC 0x06e
#define SVM_EXIT_RDPMC 0x06f
#define SVM_EXIT_PUSHF 0x070
#define SVM_EXIT_POPF 0x071
#define SVM_EXIT_CPUID 0x072
#define SVM_EXIT_RSM 0x073
#define SVM_EXIT_IRET 0x074
#define SVM_EXIT_SWINT 0x075
#define SVM_EXIT_INVD 0x076
#define SVM_EXIT_PAUSE 0x077
#define SVM_EXIT_HLT 0x078
#define SVM_EXIT_INVLPG 0x079
#define SVM_EXIT_INVLPGA 0x07a
#define SVM_EXIT_IOIO 0x07b
#define SVM_EXIT_MSR 0x07c
#define SVM_EXIT_TASK_SWITCH 0x07d
#define SVM_EXIT_FERR_FREEZE 0x07e
#define SVM_EXIT_SHUTDOWN 0x07f
#define SVM_EXIT_VMRUN 0x080
#define SVM_EXIT_VMMCALL 0x081
#define SVM_EXIT_VMLOAD 0x082
#define SVM_EXIT_VMSAVE 0x083
#define SVM_EXIT_STGI 0x084
#define SVM_EXIT_CLGI 0x085
#define SVM_EXIT_SKINIT 0x086
#define SVM_EXIT_RDTSCP 0x087
#define SVM_EXIT_ICEBP 0x088
#define SVM_EXIT_WBINVD 0x089
#define SVM_EXIT_MONITOR 0x08a
#define SVM_EXIT_MWAIT 0x08b
#define SVM_EXIT_MWAIT_COND 0x08c
#define SVM_EXIT_XSETBV 0x08d
#define SVM_EXIT_NPF 0x400
#define SVM_EXIT_ERR -1
#define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP)
#define SVM_VMLOAD ".byte 0x0f, 0x01, 0xda"
......@@ -350,3 +404,4 @@ struct __attribute__ ((__packed__)) vmcb {
#endif
#endif
arch/x86/include/asm/uprobes.h
浏览文件 @ 7e92daae
......@@ -42,10 +42,11 @@ struct arch_uprobe {
};
struct arch_uprobe_task {
unsigned long saved_trap_nr;
#ifdef CONFIG_X86_64
unsigned long saved_scratch_register;
#endif
unsigned int saved_trap_nr;
unsigned int saved_tf;
};
extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
......
arch/x86/include/asm/vmx.h
浏览文件 @ 7e92daae
......@@ -25,6 +25,88 @@
*
*/
#define VMX_EXIT_REASONS_FAILED_VMENTRY 0x80000000
#define EXIT_REASON_EXCEPTION_NMI 0
#define EXIT_REASON_EXTERNAL_INTERRUPT 1
#define EXIT_REASON_TRIPLE_FAULT 2
#define EXIT_REASON_PENDING_INTERRUPT 7
#define EXIT_REASON_NMI_WINDOW 8
#define EXIT_REASON_TASK_SWITCH 9
#define EXIT_REASON_CPUID 10
#define EXIT_REASON_HLT 12
#define EXIT_REASON_INVD 13
#define EXIT_REASON_INVLPG 14
#define EXIT_REASON_RDPMC 15
#define EXIT_REASON_RDTSC 16
#define EXIT_REASON_VMCALL 18
#define EXIT_REASON_VMCLEAR 19
#define EXIT_REASON_VMLAUNCH 20
#define EXIT_REASON_VMPTRLD 21
#define EXIT_REASON_VMPTRST 22
#define EXIT_REASON_VMREAD 23
#define EXIT_REASON_VMRESUME 24
#define EXIT_REASON_VMWRITE 25
#define EXIT_REASON_VMOFF 26
#define EXIT_REASON_VMON 27
#define EXIT_REASON_CR_ACCESS 28
#define EXIT_REASON_DR_ACCESS 29
#define EXIT_REASON_IO_INSTRUCTION 30
#define EXIT_REASON_MSR_READ 31
#define EXIT_REASON_MSR_WRITE 32
#define EXIT_REASON_INVALID_STATE 33
#define EXIT_REASON_MWAIT_INSTRUCTION 36
#define EXIT_REASON_MONITOR_INSTRUCTION 39
#define EXIT_REASON_PAUSE_INSTRUCTION 40
#define EXIT_REASON_MCE_DURING_VMENTRY 41
#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
#define EXIT_REASON_APIC_ACCESS 44
#define EXIT_REASON_EPT_VIOLATION 48
#define EXIT_REASON_EPT_MISCONFIG 49
#define EXIT_REASON_WBINVD 54
#define EXIT_REASON_XSETBV 55
#define EXIT_REASON_INVPCID 58
#define VMX_EXIT_REASONS \
{ EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
{ EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
{ EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
{ EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
{ EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
{ EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
{ EXIT_REASON_CPUID, "CPUID" }, \
{ EXIT_REASON_HLT, "HLT" }, \
{ EXIT_REASON_INVLPG, "INVLPG" }, \
{ EXIT_REASON_RDPMC, "RDPMC" }, \
{ EXIT_REASON_RDTSC, "RDTSC" }, \
{ EXIT_REASON_VMCALL, "VMCALL" }, \
{ EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
{ EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
{ EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
{ EXIT_REASON_VMPTRST, "VMPTRST" }, \
{ EXIT_REASON_VMREAD, "VMREAD" }, \
{ EXIT_REASON_VMRESUME, "VMRESUME" }, \
{ EXIT_REASON_VMWRITE, "VMWRITE" }, \
{ EXIT_REASON_VMOFF, "VMOFF" }, \
{ EXIT_REASON_VMON, "VMON" }, \
{ EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
{ EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
{ EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
{ EXIT_REASON_MSR_READ, "MSR_READ" }, \
{ EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
{ EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
{ EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
{ EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
{ EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
{ EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" }, \
{ EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
{ EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
{ EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
{ EXIT_REASON_WBINVD, "WBINVD" }
#ifdef __KERNEL__
#include <linux/types.h>
/*
......@@ -241,49 +323,6 @@ enum vmcs_field {
HOST_RIP = 0x00006c16,
};
#define VMX_EXIT_REASONS_FAILED_VMENTRY 0x80000000
#define EXIT_REASON_EXCEPTION_NMI 0
#define EXIT_REASON_EXTERNAL_INTERRUPT 1
#define EXIT_REASON_TRIPLE_FAULT 2
#define EXIT_REASON_PENDING_INTERRUPT 7
#define EXIT_REASON_NMI_WINDOW 8
#define EXIT_REASON_TASK_SWITCH 9
#define EXIT_REASON_CPUID 10
#define EXIT_REASON_HLT 12
#define EXIT_REASON_INVD 13
#define EXIT_REASON_INVLPG 14
#define EXIT_REASON_RDPMC 15
#define EXIT_REASON_RDTSC 16
#define EXIT_REASON_VMCALL 18
#define EXIT_REASON_VMCLEAR 19
#define EXIT_REASON_VMLAUNCH 20
#define EXIT_REASON_VMPTRLD 21
#define EXIT_REASON_VMPTRST 22
#define EXIT_REASON_VMREAD 23
#define EXIT_REASON_VMRESUME 24
#define EXIT_REASON_VMWRITE 25
#define EXIT_REASON_VMOFF 26
#define EXIT_REASON_VMON 27
#define EXIT_REASON_CR_ACCESS 28
#define EXIT_REASON_DR_ACCESS 29
#define EXIT_REASON_IO_INSTRUCTION 30
#define EXIT_REASON_MSR_READ 31
#define EXIT_REASON_MSR_WRITE 32
#define EXIT_REASON_INVALID_STATE 33
#define EXIT_REASON_MWAIT_INSTRUCTION 36
#define EXIT_REASON_MONITOR_INSTRUCTION 39
#define EXIT_REASON_PAUSE_INSTRUCTION 40
#define EXIT_REASON_MCE_DURING_VMENTRY 41
#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
#define EXIT_REASON_APIC_ACCESS 44
#define EXIT_REASON_EPT_VIOLATION 48
#define EXIT_REASON_EPT_MISCONFIG 49
#define EXIT_REASON_WBINVD 54
#define EXIT_REASON_XSETBV 55
#define EXIT_REASON_INVPCID 58
/*
* Interruption-information format
*/
......@@ -488,3 +527,5 @@ enum vm_instruction_error_number {
};
#endif
#endif
arch/x86/kernel/Makefile
浏览文件 @ 7e92daae
......@@ -100,6 +100,8 @@ obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o
obj-$(CONFIG_OF) += devicetree.o
obj-$(CONFIG_UPROBES) += uprobes.o
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
......
arch/x86/kernel/cpu/perf_event_intel_uncore.c
浏览文件 @ 7e92daae
......@@ -2347,6 +2347,27 @@ int uncore_pmu_event_init(struct perf_event *event)
return ret;
}
static ssize_t uncore_get_attr_cpumask(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &uncore_cpu_mask);
buf[n++] = '\n';
buf[n] = '\0';
return n;
}
static DEVICE_ATTR(cpumask, S_IRUGO, uncore_get_attr_cpumask, NULL);
static struct attribute *uncore_pmu_attrs[] = {
&dev_attr_cpumask.attr,
NULL,
};
static struct attribute_group uncore_pmu_attr_group = {
.attrs = uncore_pmu_attrs,
};
static int __init uncore_pmu_register(struct intel_uncore_pmu *pmu)
{
int ret;
......@@ -2384,8 +2405,8 @@ static void __init uncore_type_exit(struct intel_uncore_type *type)
free_percpu(type->pmus[i].box);
kfree(type->pmus);
type->pmus = NULL;
kfree(type->attr_groups[1]);
type->attr_groups[1] = NULL;
kfree(type->events_group);
type->events_group = NULL;
}
static void __init uncore_types_exit(struct intel_uncore_type **types)
......@@ -2437,9 +2458,10 @@ static int __init uncore_type_init(struct intel_uncore_type *type)
for (j = 0; j < i; j++)
attrs[j] = &type->event_descs[j].attr.attr;
type->attr_groups[1] = events_group;
type->events_group = events_group;
}
type->pmu_group = &uncore_pmu_attr_group;
type->pmus = pmus;
return 0;
fail:
......
arch/x86/kernel/cpu/perf_event_intel_uncore.h
浏览文件 @ 7e92daae
......@@ -369,10 +369,12 @@ struct intel_uncore_type {
struct intel_uncore_pmu *pmus;
struct intel_uncore_ops *ops;
struct uncore_event_desc *event_descs;
const struct attribute_group *attr_groups[3];
const struct attribute_group *attr_groups[4];
};
#define format_group attr_groups[0]
#define pmu_group attr_groups[0]
#define format_group attr_groups[1]
#define events_group attr_groups[2]
struct intel_uncore_ops {
void (*init_box)(struct intel_uncore_box *);
......
arch/x86/kernel/entry_32.S
浏览文件 @ 7e92daae
......@@ -1109,17 +1109,21 @@ ENTRY(ftrace_caller)
pushl %eax
pushl %ecx
pushl %edx
movl 0xc(%esp), %eax
pushl $0 /* Pass NULL as regs pointer */
movl 4*4(%esp), %eax
movl 0x4(%ebp), %edx
leal function_trace_op, %ecx
subl $MCOUNT_INSN_SIZE, %eax
.globl ftrace_call
ftrace_call:
call ftrace_stub
addl $4,%esp /* skip NULL pointer */
popl %edx
popl %ecx
popl %eax
ftrace_ret:
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_call
ftrace_graph_call:
......@@ -1131,6 +1135,71 @@ ftrace_stub:
ret
END(ftrace_caller)
ENTRY(ftrace_regs_caller)
pushf /* push flags before compare (in cs location) */
cmpl $0, function_trace_stop
jne ftrace_restore_flags
/*
* i386 does not save SS and ESP when coming from kernel.
* Instead, to get sp, &regs->sp is used (see ptrace.h).
* Unfortunately, that means eflags must be at the same location
* as the current return ip is. We move the return ip into the
* ip location, and move flags into the return ip location.
*/
pushl 4(%esp) /* save return ip into ip slot */
pushl $0 /* Load 0 into orig_ax */
pushl %gs
pushl %fs
pushl %es
pushl %ds
pushl %eax
pushl %ebp
pushl %edi
pushl %esi
pushl %edx
pushl %ecx
pushl %ebx
movl 13*4(%esp), %eax /* Get the saved flags */
movl %eax, 14*4(%esp) /* Move saved flags into regs->flags location */
/* clobbering return ip */
movl $__KERNEL_CS,13*4(%esp)
movl 12*4(%esp), %eax /* Load ip (1st parameter) */
subl $MCOUNT_INSN_SIZE, %eax /* Adjust ip */
movl 0x4(%ebp), %edx /* Load parent ip (2nd parameter) */
leal function_trace_op, %ecx /* Save ftrace_pos in 3rd parameter */
pushl %esp /* Save pt_regs as 4th parameter */
GLOBAL(ftrace_regs_call)
call ftrace_stub
addl $4, %esp /* Skip pt_regs */
movl 14*4(%esp), %eax /* Move flags back into cs */
movl %eax, 13*4(%esp) /* Needed to keep addl from modifying flags */
movl 12*4(%esp), %eax /* Get return ip from regs->ip */
movl %eax, 14*4(%esp) /* Put return ip back for ret */
popl %ebx
popl %ecx
popl %edx
popl %esi
popl %edi
popl %ebp
popl %eax
popl %ds
popl %es
popl %fs
popl %gs
addl $8, %esp /* Skip orig_ax and ip */
popf /* Pop flags at end (no addl to corrupt flags) */
jmp ftrace_ret
ftrace_restore_flags:
popf
jmp ftrace_stub
#else /* ! CONFIG_DYNAMIC_FTRACE */
ENTRY(mcount)
......@@ -1171,9 +1240,6 @@ END(mcount)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(ftrace_graph_caller)
cmpl $0, function_trace_stop
jne ftrace_stub
pushl %eax
pushl %ecx
pushl %edx
......
arch/x86/kernel/entry_64.S
浏览文件 @ 7e92daae
......@@ -69,25 +69,51 @@
.section .entry.text, "ax"
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CC_USING_FENTRY
# define function_hook __fentry__
#else
# define function_hook mcount
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(mcount)
ENTRY(function_hook)
retq
END(mcount)
END(function_hook)
/* skip is set if stack has been adjusted */
.macro ftrace_caller_setup skip=0
MCOUNT_SAVE_FRAME \skip
/* Load the ftrace_ops into the 3rd parameter */
leaq function_trace_op, %rdx
/* Load ip into the first parameter */
movq RIP(%rsp), %rdi
subq $MCOUNT_INSN_SIZE, %rdi
/* Load the parent_ip into the second parameter */
#ifdef CC_USING_FENTRY
movq SS+16(%rsp), %rsi
#else
movq 8(%rbp), %rsi
#endif
.endm
ENTRY(ftrace_caller)
/* Check if tracing was disabled (quick check) */
cmpl $0, function_trace_stop
jne ftrace_stub
MCOUNT_SAVE_FRAME
movq 0x38(%rsp), %rdi
movq 8(%rbp), %rsi
subq $MCOUNT_INSN_SIZE, %rdi
ftrace_caller_setup
/* regs go into 4th parameter (but make it NULL) */
movq $0, %rcx
GLOBAL(ftrace_call)
call ftrace_stub
MCOUNT_RESTORE_FRAME
ftrace_return:
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
GLOBAL(ftrace_graph_call)
......@@ -98,8 +124,78 @@ GLOBAL(ftrace_stub)
retq
END(ftrace_caller)
ENTRY(ftrace_regs_caller)
/* Save the current flags before compare (in SS location)*/
pushfq
/* Check if tracing was disabled (quick check) */
cmpl $0, function_trace_stop
jne ftrace_restore_flags
/* skip=8 to skip flags saved in SS */
ftrace_caller_setup 8
/* Save the rest of pt_regs */
movq %r15, R15(%rsp)
movq %r14, R14(%rsp)
movq %r13, R13(%rsp)
movq %r12, R12(%rsp)
movq %r11, R11(%rsp)
movq %r10, R10(%rsp)
movq %rbp, RBP(%rsp)
movq %rbx, RBX(%rsp)
/* Copy saved flags */
movq SS(%rsp), %rcx
movq %rcx, EFLAGS(%rsp)
/* Kernel segments */
movq $__KERNEL_DS, %rcx
movq %rcx, SS(%rsp)
movq $__KERNEL_CS, %rcx
movq %rcx, CS(%rsp)
/* Stack - skipping return address */
leaq SS+16(%rsp), %rcx
movq %rcx, RSP(%rsp)
/* regs go into 4th parameter */
leaq (%rsp), %rcx
GLOBAL(ftrace_regs_call)
call ftrace_stub
/* Copy flags back to SS, to restore them */
movq EFLAGS(%rsp), %rax
movq %rax, SS(%rsp)
/* Handlers can change the RIP */
movq RIP(%rsp), %rax
movq %rax, SS+8(%rsp)
/* restore the rest of pt_regs */
movq R15(%rsp), %r15
movq R14(%rsp), %r14
movq R13(%rsp), %r13
movq R12(%rsp), %r12
movq R10(%rsp), %r10
movq RBP(%rsp), %rbp
movq RBX(%rsp), %rbx
/* skip=8 to skip flags saved in SS */
MCOUNT_RESTORE_FRAME 8
/* Restore flags */
popfq
jmp ftrace_return
ftrace_restore_flags:
popfq
jmp ftrace_stub
END(ftrace_regs_caller)
#else /* ! CONFIG_DYNAMIC_FTRACE */
ENTRY(mcount)
ENTRY(function_hook)
cmpl $0, function_trace_stop
jne ftrace_stub
......@@ -120,8 +216,12 @@ GLOBAL(ftrace_stub)
trace:
MCOUNT_SAVE_FRAME
movq 0x38(%rsp), %rdi
movq RIP(%rsp), %rdi
#ifdef CC_USING_FENTRY
movq SS+16(%rsp), %rsi
#else
movq 8(%rbp), %rsi
#endif
subq $MCOUNT_INSN_SIZE, %rdi
call *ftrace_trace_function
......@@ -129,20 +229,22 @@ trace:
MCOUNT_RESTORE_FRAME
jmp ftrace_stub
END(mcount)
END(function_hook)
#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(ftrace_graph_caller)
cmpl $0, function_trace_stop
jne ftrace_stub
MCOUNT_SAVE_FRAME
#ifdef CC_USING_FENTRY
leaq SS+16(%rsp), %rdi
movq $0, %rdx /* No framepointers needed */
#else
leaq 8(%rbp), %rdi
movq 0x38(%rsp), %rsi
movq (%rbp), %rdx
#endif
movq RIP(%rsp), %rsi
subq $MCOUNT_INSN_SIZE, %rsi
call prepare_ftrace_return
......
arch/x86/kernel/ftrace.c
浏览文件 @ 7e92daae
......@@ -206,6 +206,21 @@ static int
ftrace_modify_code(unsigned long ip, unsigned const char *old_code,
unsigned const char *new_code);
/*
* Should never be called:
* As it is only called by __ftrace_replace_code() which is called by
* ftrace_replace_code() that x86 overrides, and by ftrace_update_code()
* which is called to turn mcount into nops or nops into function calls
* but not to convert a function from not using regs to one that uses
* regs, which ftrace_modify_call() is for.
*/
int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
WARN_ON(1);
return -EINVAL;
}
int ftrace_update_ftrace_func(ftrace_func_t func)
{
unsigned long ip = (unsigned long)(&ftrace_call);
......@@ -220,6 +235,14 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
ret = ftrace_modify_code(ip, old, new);
/* Also update the regs callback function */
if (!ret) {
ip = (unsigned long)(&ftrace_regs_call);
memcpy(old, &ftrace_regs_call, MCOUNT_INSN_SIZE);
new = ftrace_call_replace(ip, (unsigned long)func);
ret = ftrace_modify_code(ip, old, new);
}
atomic_dec(&modifying_ftrace_code);
return ret;
......@@ -299,6 +322,32 @@ static int add_brk_on_nop(struct dyn_ftrace *rec)
return add_break(rec->ip, old);
}
/*
* If the record has the FTRACE_FL_REGS set, that means that it
* wants to convert to a callback that saves all regs. If FTRACE_FL_REGS
* is not not set, then it wants to convert to the normal callback.
*/
static unsigned long get_ftrace_addr(struct dyn_ftrace *rec)
{
if (rec->flags & FTRACE_FL_REGS)
return (unsigned long)FTRACE_REGS_ADDR;
else
return (unsigned long)FTRACE_ADDR;
}
/*
* The FTRACE_FL_REGS_EN is set when the record already points to
* a function that saves all the regs. Basically the '_EN' version
* represents the current state of the function.
*/
static unsigned long get_ftrace_old_addr(struct dyn_ftrace *rec)
{
if (rec->flags & FTRACE_FL_REGS_EN)
return (unsigned long)FTRACE_REGS_ADDR;
else
return (unsigned long)FTRACE_ADDR;
}
static int add_breakpoints(struct dyn_ftrace *rec, int enable)
{
unsigned long ftrace_addr;
......@@ -306,7 +355,7 @@ static int add_breakpoints(struct dyn_ftrace *rec, int enable)
ret = ftrace_test_record(rec, enable);
ftrace_addr = (unsigned long)FTRACE_ADDR;
ftrace_addr = get_ftrace_addr(rec);
switch (ret) {
case FTRACE_UPDATE_IGNORE:
......@@ -316,6 +365,10 @@ static int add_breakpoints(struct dyn_ftrace *rec, int enable)
/* converting nop to call */
return add_brk_on_nop(rec);
case FTRACE_UPDATE_MODIFY_CALL_REGS:
case FTRACE_UPDATE_MODIFY_CALL:
ftrace_addr = get_ftrace_old_addr(rec);
/* fall through */
case FTRACE_UPDATE_MAKE_NOP:
/* converting a call to a nop */
return add_brk_on_call(rec, ftrace_addr);
......@@ -360,13 +413,21 @@ static int remove_breakpoint(struct dyn_ftrace *rec)
* If not, don't touch the breakpoint, we make just create
* a disaster.
*/
ftrace_addr = (unsigned long)FTRACE_ADDR;
ftrace_addr = get_ftrace_addr(rec);
nop = ftrace_call_replace(ip, ftrace_addr);
if (memcmp(&ins[1], &nop[1], MCOUNT_INSN_SIZE - 1) == 0)
goto update;
/* Check both ftrace_addr and ftrace_old_addr */
ftrace_addr = get_ftrace_old_addr(rec);
nop = ftrace_call_replace(ip, ftrace_addr);
if (memcmp(&ins[1], &nop[1], MCOUNT_INSN_SIZE - 1) != 0)
return -EINVAL;
}
update:
return probe_kernel_write((void *)ip, &nop[0], 1);
}
......@@ -405,12 +466,14 @@ static int add_update(struct dyn_ftrace *rec, int enable)
ret = ftrace_test_record(rec, enable);
ftrace_addr = (unsigned long)FTRACE_ADDR;
ftrace_addr = get_ftrace_addr(rec);
switch (ret) {
case FTRACE_UPDATE_IGNORE:
return 0;
case FTRACE_UPDATE_MODIFY_CALL_REGS:
case FTRACE_UPDATE_MODIFY_CALL:
case FTRACE_UPDATE_MAKE_CALL:
/* converting nop to call */
return add_update_call(rec, ftrace_addr);
......@@ -455,12 +518,14 @@ static int finish_update(struct dyn_ftrace *rec, int enable)
ret = ftrace_update_record(rec, enable);
ftrace_addr = (unsigned long)FTRACE_ADDR;
ftrace_addr = get_ftrace_addr(rec);
switch (ret) {
case FTRACE_UPDATE_IGNORE:
return 0;
case FTRACE_UPDATE_MODIFY_CALL_REGS:
case FTRACE_UPDATE_MODIFY_CALL:
case FTRACE_UPDATE_MAKE_CALL:
/* converting nop to call */
return finish_update_call(rec, ftrace_addr);
......
arch/x86/kernel/kprobes.c
浏览文件 @ 7e92daae
......@@ -541,6 +541,23 @@ reenter_kprobe(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb
return 1;
}
#ifdef KPROBES_CAN_USE_FTRACE
static void __kprobes skip_singlestep(struct kprobe *p, struct pt_regs *regs,
struct kprobe_ctlblk *kcb)
{
/*
* Emulate singlestep (and also recover regs->ip)
* as if there is a 5byte nop
*/
regs->ip = (unsigned long)p->addr + MCOUNT_INSN_SIZE;
if (unlikely(p->post_handler)) {
kcb->kprobe_status = KPROBE_HIT_SSDONE;
p->post_handler(p, regs, 0);
}
__this_cpu_write(current_kprobe, NULL);
}
#endif
/*
* Interrupts are disabled on entry as trap3 is an interrupt gate and they
* remain disabled throughout this function.
......@@ -599,6 +616,12 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
} else if (kprobe_running()) {
p = __this_cpu_read(current_kprobe);
if (p->break_handler && p->break_handler(p, regs)) {
#ifdef KPROBES_CAN_USE_FTRACE
if (kprobe_ftrace(p)) {
skip_singlestep(p, regs, kcb);
return 1;
}
#endif
setup_singlestep(p, regs, kcb, 0);
return 1;
}
......@@ -1052,6 +1075,50 @@ int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
return 0;
}
#ifdef KPROBES_CAN_USE_FTRACE
/* Ftrace callback handler for kprobes */
void __kprobes kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *ops, struct pt_regs *regs)
{
struct kprobe *p;
struct kprobe_ctlblk *kcb;
unsigned long flags;
/* Disable irq for emulating a breakpoint and avoiding preempt */
local_irq_save(flags);
p = get_kprobe((kprobe_opcode_t *)ip);
if (unlikely(!p) || kprobe_disabled(p))
goto end;
kcb = get_kprobe_ctlblk();
if (kprobe_running()) {
kprobes_inc_nmissed_count(p);
} else {
/* Kprobe handler expects regs->ip = ip + 1 as breakpoint hit */
regs->ip = ip + sizeof(kprobe_opcode_t);
__this_cpu_write(current_kprobe, p);
kcb->kprobe_status = KPROBE_HIT_ACTIVE;
if (!p->pre_handler || !p->pre_handler(p, regs))
skip_singlestep(p, regs, kcb);
/*
* If pre_handler returns !0, it sets regs->ip and
* resets current kprobe.
*/
}
end:
local_irq_restore(flags);
}
int __kprobes arch_prepare_kprobe_ftrace(struct kprobe *p)
{
p->ainsn.insn = NULL;
p->ainsn.boostable = -1;
return 0;
}
#endif
int __init arch_init_kprobes(void)
{
return arch_init_optprobes();
......
arch/x86/kernel/perf_regs.c 0 → 100644
浏览文件 @ 7e92daae
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/perf_event.h>
#include <linux/bug.h>
#include <linux/stddef.h>
#include <asm/perf_regs.h>
#include <asm/ptrace.h>
#ifdef CONFIG_X86_32
#define PERF_REG_X86_MAX PERF_REG_X86_32_MAX
#else
#define PERF_REG_X86_MAX PERF_REG_X86_64_MAX
#endif
#define PT_REGS_OFFSET(id, r) [id] = offsetof(struct pt_regs, r)
static unsigned int pt_regs_offset[PERF_REG_X86_MAX] = {
PT_REGS_OFFSET(PERF_REG_X86_AX, ax),
PT_REGS_OFFSET(PERF_REG_X86_BX, bx),
PT_REGS_OFFSET(PERF_REG_X86_CX, cx),
PT_REGS_OFFSET(PERF_REG_X86_DX, dx),
PT_REGS_OFFSET(PERF_REG_X86_SI, si),
PT_REGS_OFFSET(PERF_REG_X86_DI, di),
PT_REGS_OFFSET(PERF_REG_X86_BP, bp),
PT_REGS_OFFSET(PERF_REG_X86_SP, sp),
PT_REGS_OFFSET(PERF_REG_X86_IP, ip),
PT_REGS_OFFSET(PERF_REG_X86_FLAGS, flags),
PT_REGS_OFFSET(PERF_REG_X86_CS, cs),
PT_REGS_OFFSET(PERF_REG_X86_SS, ss),
#ifdef CONFIG_X86_32
PT_REGS_OFFSET(PERF_REG_X86_DS, ds),
PT_REGS_OFFSET(PERF_REG_X86_ES, es),
PT_REGS_OFFSET(PERF_REG_X86_FS, fs),
PT_REGS_OFFSET(PERF_REG_X86_GS, gs),
#else
/*
* The pt_regs struct does not store
* ds, es, fs, gs in 64 bit mode.
*/
(unsigned int) -1,
(unsigned int) -1,
(unsigned int) -1,
(unsigned int) -1,
#endif
#ifdef CONFIG_X86_64
PT_REGS_OFFSET(PERF_REG_X86_R8, r8),
PT_REGS_OFFSET(PERF_REG_X86_R9, r9),
PT_REGS_OFFSET(PERF_REG_X86_R10, r10),
PT_REGS_OFFSET(PERF_REG_X86_R11, r11),
PT_REGS_OFFSET(PERF_REG_X86_R12, r12),
PT_REGS_OFFSET(PERF_REG_X86_R13, r13),
PT_REGS_OFFSET(PERF_REG_X86_R14, r14),
PT_REGS_OFFSET(PERF_REG_X86_R15, r15),
#endif
};
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
if (WARN_ON_ONCE(idx >= ARRAY_SIZE(pt_regs_offset)))
return 0;
return regs_get_register(regs, pt_regs_offset[idx]);
}
#define REG_RESERVED (~((1ULL << PERF_REG_X86_MAX) - 1ULL))
#ifdef CONFIG_X86_32
int perf_reg_validate(u64 mask)
{
if (!mask || mask & REG_RESERVED)
return -EINVAL;
return 0;
}
u64 perf_reg_abi(struct task_struct *task)
{
return PERF_SAMPLE_REGS_ABI_32;
}
#else /* CONFIG_X86_64 */
#define REG_NOSUPPORT ((1ULL << PERF_REG_X86_DS) | \
(1ULL << PERF_REG_X86_ES) | \
(1ULL << PERF_REG_X86_FS) | \
(1ULL << PERF_REG_X86_GS))
int perf_reg_validate(u64 mask)
{
if (!mask || mask & REG_RESERVED)
return -EINVAL;
if (mask & REG_NOSUPPORT)
return -EINVAL;
return 0;
}
u64 perf_reg_abi(struct task_struct *task)
{
if (test_tsk_thread_flag(task, TIF_IA32))
return PERF_SAMPLE_REGS_ABI_32;
else
return PERF_SAMPLE_REGS_ABI_64;
}
#endif /* CONFIG_X86_32 */
arch/x86/kernel/step.c
浏览文件 @ 7e92daae
......@@ -157,6 +157,33 @@ static int enable_single_step(struct task_struct *child)
return 1;
}
void set_task_blockstep(struct task_struct *task, bool on)
{
unsigned long debugctl;
/*
* Ensure irq/preemption can't change debugctl in between.
* Note also that both TIF_BLOCKSTEP and debugctl should
* be changed atomically wrt preemption.
* FIXME: this means that set/clear TIF_BLOCKSTEP is simply
* wrong if task != current, SIGKILL can wakeup the stopped
* tracee and set/clear can play with the running task, this
* can confuse the next __switch_to_xtra().
*/
local_irq_disable();
debugctl = get_debugctlmsr();
if (on) {
debugctl |= DEBUGCTLMSR_BTF;
set_tsk_thread_flag(task, TIF_BLOCKSTEP);
} else {
debugctl &= ~DEBUGCTLMSR_BTF;
clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
}
if (task == current)
update_debugctlmsr(debugctl);
local_irq_enable();
}
/*
* Enable single or block step.
*/
......@@ -169,19 +196,10 @@ static void enable_step(struct task_struct *child, bool block)
* So no one should try to use debugger block stepping in a program
* that uses user-mode single stepping itself.
*/
if (enable_single_step(child) && block) {
unsigned long debugctl = get_debugctlmsr();
debugctl |= DEBUGCTLMSR_BTF;
update_debugctlmsr(debugctl);
set_tsk_thread_flag(child, TIF_BLOCKSTEP);
} else if (test_tsk_thread_flag(child, TIF_BLOCKSTEP)) {
unsigned long debugctl = get_debugctlmsr();
debugctl &= ~DEBUGCTLMSR_BTF;
update_debugctlmsr(debugctl);
clear_tsk_thread_flag(child, TIF_BLOCKSTEP);
}
if (enable_single_step(child) && block)
set_task_blockstep(child, true);
else if (test_tsk_thread_flag(child, TIF_BLOCKSTEP))
set_task_blockstep(child, false);
}
void user_enable_single_step(struct task_struct *child)
......@@ -199,13 +217,8 @@ void user_disable_single_step(struct task_struct *child)
/*
* Make sure block stepping (BTF) is disabled.
*/
if (test_tsk_thread_flag(child, TIF_BLOCKSTEP)) {
unsigned long debugctl = get_debugctlmsr();
debugctl &= ~DEBUGCTLMSR_BTF;
update_debugctlmsr(debugctl);
clear_tsk_thread_flag(child, TIF_BLOCKSTEP);
}
if (test_tsk_thread_flag(child, TIF_BLOCKSTEP))
set_task_blockstep(child, false);
/* Always clear TIF_SINGLESTEP... */
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
......
arch/x86/kernel/uprobes.c
浏览文件 @ 7e92daae
......@@ -41,6 +41,9 @@
/* Adjust the return address of a call insn */
#define UPROBE_FIX_CALL 0x2
/* Instruction will modify TF, don't change it */
#define UPROBE_FIX_SETF 0x4
#define UPROBE_FIX_RIP_AX 0x8000
#define UPROBE_FIX_RIP_CX 0x4000
......@@ -239,6 +242,10 @@ static void prepare_fixups(struct arch_uprobe *auprobe, struct insn *insn)
insn_get_opcode(insn); /* should be a nop */
switch (OPCODE1(insn)) {
case 0x9d:
/* popf */
auprobe->fixups |= UPROBE_FIX_SETF;
break;
case 0xc3: /* ret/lret */
case 0xcb:
case 0xc2:
......@@ -646,7 +653,7 @@ void arch_uprobe_abort_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
* Skip these instructions as per the currently known x86 ISA.
* 0x66* { 0x90 | 0x0f 0x1f | 0x0f 0x19 | 0x87 0xc0 }
*/
bool arch_uprobe_skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs)
static bool __skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs)
{
int i;
......@@ -673,3 +680,46 @@ bool arch_uprobe_skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs)
}
return false;
}
bool arch_uprobe_skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs)
{
bool ret = __skip_sstep(auprobe, regs);
if (ret && (regs->flags & X86_EFLAGS_TF))
send_sig(SIGTRAP, current, 0);
return ret;
}
void arch_uprobe_enable_step(struct arch_uprobe *auprobe)
{
struct task_struct *task = current;
struct arch_uprobe_task *autask = &task->utask->autask;
struct pt_regs *regs = task_pt_regs(task);
autask->saved_tf = !!(regs->flags & X86_EFLAGS_TF);
regs->flags |= X86_EFLAGS_TF;
if (test_tsk_thread_flag(task, TIF_BLOCKSTEP))
set_task_blockstep(task, false);
}
void arch_uprobe_disable_step(struct arch_uprobe *auprobe)
{
struct task_struct *task = current;
struct arch_uprobe_task *autask = &task->utask->autask;
bool trapped = (task->utask->state == UTASK_SSTEP_TRAPPED);
struct pt_regs *regs = task_pt_regs(task);
/*
* The state of TIF_BLOCKSTEP was not saved so we can get an extra
* SIGTRAP if we do not clear TF. We need to examine the opcode to
* make it right.
*/
if (unlikely(trapped)) {
if (!autask->saved_tf)
regs->flags &= ~X86_EFLAGS_TF;
} else {
if (autask->saved_tf)
send_sig(SIGTRAP, task, 0);
else if (!(auprobe->fixups & UPROBE_FIX_SETF))
regs->flags &= ~X86_EFLAGS_TF;
}
}
arch/x86/kernel/x8664_ksyms_64.c
浏览文件 @ 7e92daae
......@@ -13,9 +13,13 @@
#include <asm/ftrace.h>
#ifdef CONFIG_FUNCTION_TRACER
/* mcount is defined in assembly */
/* mcount and __fentry__ are defined in assembly */
#ifdef CC_USING_FENTRY
EXPORT_SYMBOL(__fentry__);
#else
EXPORT_SYMBOL(mcount);
#endif
#endif
EXPORT_SYMBOL(__get_user_1);
EXPORT_SYMBOL(__get_user_2);
......
arch/x86/kvm/trace.h
浏览文件 @ 7e92daae
......@@ -183,95 +183,6 @@ TRACE_EVENT(kvm_apic,
#define KVM_ISA_VMX 1
#define KVM_ISA_SVM 2
#define VMX_EXIT_REASONS \
{ EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
{ EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
{ EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
{ EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
{ EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
{ EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
{ EXIT_REASON_CPUID, "CPUID" }, \
{ EXIT_REASON_HLT, "HLT" }, \
{ EXIT_REASON_INVLPG, "INVLPG" }, \
{ EXIT_REASON_RDPMC, "RDPMC" }, \
{ EXIT_REASON_RDTSC, "RDTSC" }, \
{ EXIT_REASON_VMCALL, "VMCALL" }, \
{ EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
{ EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
{ EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
{ EXIT_REASON_VMPTRST, "VMPTRST" }, \
{ EXIT_REASON_VMREAD, "VMREAD" }, \
{ EXIT_REASON_VMRESUME, "VMRESUME" }, \
{ EXIT_REASON_VMWRITE, "VMWRITE" }, \
{ EXIT_REASON_VMOFF, "VMOFF" }, \
{ EXIT_REASON_VMON, "VMON" }, \
{ EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
{ EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
{ EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
{ EXIT_REASON_MSR_READ, "MSR_READ" }, \
{ EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
{ EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
{ EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
{ EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
{ EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
{ EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" }, \
{ EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
{ EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
{ EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
{ EXIT_REASON_WBINVD, "WBINVD" }
#define SVM_EXIT_REASONS \
{ SVM_EXIT_READ_CR0, "read_cr0" }, \
{ SVM_EXIT_READ_CR3, "read_cr3" }, \
{ SVM_EXIT_READ_CR4, "read_cr4" }, \
{ SVM_EXIT_READ_CR8, "read_cr8" }, \
{ SVM_EXIT_WRITE_CR0, "write_cr0" }, \
{ SVM_EXIT_WRITE_CR3, "write_cr3" }, \
{ SVM_EXIT_WRITE_CR4, "write_cr4" }, \
{ SVM_EXIT_WRITE_CR8, "write_cr8" }, \
{ SVM_EXIT_READ_DR0, "read_dr0" }, \
{ SVM_EXIT_READ_DR1, "read_dr1" }, \
{ SVM_EXIT_READ_DR2, "read_dr2" }, \
{ SVM_EXIT_READ_DR3, "read_dr3" }, \
{ SVM_EXIT_WRITE_DR0, "write_dr0" }, \
{ SVM_EXIT_WRITE_DR1, "write_dr1" }, \
{ SVM_EXIT_WRITE_DR2, "write_dr2" }, \
{ SVM_EXIT_WRITE_DR3, "write_dr3" }, \
{ SVM_EXIT_WRITE_DR5, "write_dr5" }, \
{ SVM_EXIT_WRITE_DR7, "write_dr7" }, \
{ SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, \
{ SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, \
{ SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, \
{ SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, \
{ SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, \
{ SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, \
{ SVM_EXIT_INTR, "interrupt" }, \
{ SVM_EXIT_NMI, "nmi" }, \
{ SVM_EXIT_SMI, "smi" }, \
{ SVM_EXIT_INIT, "init" }, \
{ SVM_EXIT_VINTR, "vintr" }, \
{ SVM_EXIT_CPUID, "cpuid" }, \
{ SVM_EXIT_INVD, "invd" }, \
{ SVM_EXIT_HLT, "hlt" }, \
{ SVM_EXIT_INVLPG, "invlpg" }, \
{ SVM_EXIT_INVLPGA, "invlpga" }, \
{ SVM_EXIT_IOIO, "io" }, \
{ SVM_EXIT_MSR, "msr" }, \
{ SVM_EXIT_TASK_SWITCH, "task_switch" }, \
{ SVM_EXIT_SHUTDOWN, "shutdown" }, \
{ SVM_EXIT_VMRUN, "vmrun" }, \
{ SVM_EXIT_VMMCALL, "hypercall" }, \
{ SVM_EXIT_VMLOAD, "vmload" }, \
{ SVM_EXIT_VMSAVE, "vmsave" }, \
{ SVM_EXIT_STGI, "stgi" }, \
{ SVM_EXIT_CLGI, "clgi" }, \
{ SVM_EXIT_SKINIT, "skinit" }, \
{ SVM_EXIT_WBINVD, "wbinvd" }, \
{ SVM_EXIT_MONITOR, "monitor" }, \
{ SVM_EXIT_MWAIT, "mwait" }, \
{ SVM_EXIT_XSETBV, "xsetbv" }, \
{ SVM_EXIT_NPF, "npf" }
/*
* Tracepoint for kvm guest exit:
*/
......
drivers/oprofile/cpu_buffer.c
浏览文件 @ 7e92daae
......@@ -451,14 +451,9 @@ static void wq_sync_buffer(struct work_struct *work)
{
struct oprofile_cpu_buffer *b =
container_of(work, struct oprofile_cpu_buffer, work.work);
if (b->cpu != smp_processor_id()) {
printk(KERN_DEBUG "WQ on CPU%d, prefer CPU%d\n",
smp_processor_id(), b->cpu);
if (!cpu_online(b->cpu)) {
cancel_delayed_work(&b->work);
return;
}
if (b->cpu != smp_processor_id() && !cpu_online(b->cpu)) {
cancel_delayed_work(&b->work);
return;
}
sync_buffer(b->cpu);
......
include/linux/ftrace.h
浏览文件 @ 7e92daae
......@@ -10,6 +10,7 @@
#include <linux/kallsyms.h>
#include <linux/linkage.h>
#include <linux/bitops.h>
#include <linux/ptrace.h>
#include <linux/ktime.h>
#include <linux/sched.h>
#include <linux/types.h>
......@@ -18,6 +19,28 @@
#include <asm/ftrace.h>
/*
* If the arch supports passing the variable contents of
* function_trace_op as the third parameter back from the
* mcount call, then the arch should define this as 1.
*/
#ifndef ARCH_SUPPORTS_FTRACE_OPS
#define ARCH_SUPPORTS_FTRACE_OPS 0
#endif
/*
* If the arch's mcount caller does not support all of ftrace's
* features, then it must call an indirect function that
* does. Or at least does enough to prevent any unwelcomed side effects.
*/
#if !defined(CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST) || \
!ARCH_SUPPORTS_FTRACE_OPS
# define FTRACE_FORCE_LIST_FUNC 1
#else
# define FTRACE_FORCE_LIST_FUNC 0
#endif
struct module;
struct ftrace_hash;
......@@ -29,7 +52,10 @@ ftrace_enable_sysctl(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos);
typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip);
struct ftrace_ops;
typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs);
/*
* FTRACE_OPS_FL_* bits denote the state of ftrace_ops struct and are
......@@ -45,12 +71,33 @@ typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip);
* could be controled by following calls:
* ftrace_function_local_enable
* ftrace_function_local_disable
* SAVE_REGS - The ftrace_ops wants regs saved at each function called
* and passed to the callback. If this flag is set, but the
* architecture does not support passing regs
* (ARCH_SUPPORTS_FTRACE_SAVE_REGS is not defined), then the
* ftrace_ops will fail to register, unless the next flag
* is set.
* SAVE_REGS_IF_SUPPORTED - This is the same as SAVE_REGS, but if the
* handler can handle an arch that does not save regs
* (the handler tests if regs == NULL), then it can set
* this flag instead. It will not fail registering the ftrace_ops
* but, the regs field will be NULL if the arch does not support
* passing regs to the handler.
* Note, if this flag is set, the SAVE_REGS flag will automatically
* get set upon registering the ftrace_ops, if the arch supports it.
* RECURSION_SAFE - The ftrace_ops can set this to tell the ftrace infrastructure
* that the call back has its own recursion protection. If it does
* not set this, then the ftrace infrastructure will add recursion
* protection for the caller.
*/
enum {
FTRACE_OPS_FL_ENABLED = 1 << 0,
FTRACE_OPS_FL_GLOBAL = 1 << 1,
FTRACE_OPS_FL_DYNAMIC = 1 << 2,
FTRACE_OPS_FL_CONTROL = 1 << 3,
FTRACE_OPS_FL_ENABLED = 1 << 0,
FTRACE_OPS_FL_GLOBAL = 1 << 1,
FTRACE_OPS_FL_DYNAMIC = 1 << 2,
FTRACE_OPS_FL_CONTROL = 1 << 3,
FTRACE_OPS_FL_SAVE_REGS = 1 << 4,
FTRACE_OPS_FL_SAVE_REGS_IF_SUPPORTED = 1 << 5,
FTRACE_OPS_FL_RECURSION_SAFE = 1 << 6,
};
struct ftrace_ops {
......@@ -163,7 +210,8 @@ static inline int ftrace_function_local_disabled(struct ftrace_ops *ops)
return *this_cpu_ptr(ops->disabled);
}
extern void ftrace_stub(unsigned long a0, unsigned long a1);
extern void ftrace_stub(unsigned long a0, unsigned long a1,
struct ftrace_ops *op, struct pt_regs *regs);
#else /* !CONFIG_FUNCTION_TRACER */
/*
......@@ -172,6 +220,10 @@ extern void ftrace_stub(unsigned long a0, unsigned long a1);
*/
#define register_ftrace_function(ops) ({ 0; })
#define unregister_ftrace_function(ops) ({ 0; })
static inline int ftrace_nr_registered_ops(void)
{
return 0;
}
static inline void clear_ftrace_function(void) { }
static inline void ftrace_kill(void) { }
static inline void ftrace_stop(void) { }
......@@ -227,12 +279,33 @@ extern void unregister_ftrace_function_probe_all(char *glob);
extern int ftrace_text_reserved(void *start, void *end);
extern int ftrace_nr_registered_ops(void);
/*
* The dyn_ftrace record's flags field is split into two parts.
* the first part which is '0-FTRACE_REF_MAX' is a counter of
* the number of callbacks that have registered the function that
* the dyn_ftrace descriptor represents.
*
* The second part is a mask:
* ENABLED - the function is being traced
* REGS - the record wants the function to save regs
* REGS_EN - the function is set up to save regs.
*
* When a new ftrace_ops is registered and wants a function to save
* pt_regs, the rec->flag REGS is set. When the function has been
* set up to save regs, the REG_EN flag is set. Once a function
* starts saving regs it will do so until all ftrace_ops are removed
* from tracing that function.
*/
enum {
FTRACE_FL_ENABLED = (1 << 30),
FTRACE_FL_ENABLED = (1UL << 29),
FTRACE_FL_REGS = (1UL << 30),
FTRACE_FL_REGS_EN = (1UL << 31)
};
#define FTRACE_FL_MASK (0x3UL << 30)
#define FTRACE_REF_MAX ((1 << 30) - 1)
#define FTRACE_FL_MASK (0x7UL << 29)
#define FTRACE_REF_MAX ((1UL << 29) - 1)
struct dyn_ftrace {
union {
......@@ -244,6 +317,8 @@ struct dyn_ftrace {
};
int ftrace_force_update(void);
int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip,
int remove, int reset);
int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
int len, int reset);
int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
......@@ -263,9 +338,23 @@ enum {
FTRACE_STOP_FUNC_RET = (1 << 4),
};
/*
* The FTRACE_UPDATE_* enum is used to pass information back
* from the ftrace_update_record() and ftrace_test_record()
* functions. These are called by the code update routines
* to find out what is to be done for a given function.
*
* IGNORE - The function is already what we want it to be
* MAKE_CALL - Start tracing the function
* MODIFY_CALL - Stop saving regs for the function
* MODIFY_CALL_REGS - Start saving regs for the function
* MAKE_NOP - Stop tracing the function
*/
enum {
FTRACE_UPDATE_IGNORE,
FTRACE_UPDATE_MAKE_CALL,
FTRACE_UPDATE_MODIFY_CALL,
FTRACE_UPDATE_MODIFY_CALL_REGS,
FTRACE_UPDATE_MAKE_NOP,
};
......@@ -317,7 +406,9 @@ extern int ftrace_dyn_arch_init(void *data);
extern void ftrace_replace_code(int enable);
extern int ftrace_update_ftrace_func(ftrace_func_t func);
extern void ftrace_caller(void);
extern void ftrace_regs_caller(void);
extern void ftrace_call(void);
extern void ftrace_regs_call(void);
extern void mcount_call(void);
void ftrace_modify_all_code(int command);
......@@ -325,6 +416,15 @@ void ftrace_modify_all_code(int command);
#ifndef FTRACE_ADDR
#define FTRACE_ADDR ((unsigned long)ftrace_caller)
#endif
#ifndef FTRACE_REGS_ADDR
#ifdef ARCH_SUPPORTS_FTRACE_SAVE_REGS
# define FTRACE_REGS_ADDR ((unsigned long)ftrace_regs_caller)
#else
# define FTRACE_REGS_ADDR FTRACE_ADDR
#endif
#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
extern void ftrace_graph_caller(void);
extern int ftrace_enable_ftrace_graph_caller(void);
......@@ -380,6 +480,39 @@ extern int ftrace_make_nop(struct module *mod,
*/
extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr);
#ifdef ARCH_SUPPORTS_FTRACE_SAVE_REGS
/**
* ftrace_modify_call - convert from one addr to another (no nop)
* @rec: the mcount call site record
* @old_addr: the address expected to be currently called to
* @addr: the address to change to
*
* This is a very sensitive operation and great care needs
* to be taken by the arch. The operation should carefully
* read the location, check to see if what is read is indeed
* what we expect it to be, and then on success of the compare,
* it should write to the location.
*
* The code segment at @rec->ip should be a caller to @old_addr
*
* Return must be:
* 0 on success
* -EFAULT on error reading the location
* -EINVAL on a failed compare of the contents
* -EPERM on error writing to the location
* Any other value will be considered a failure.
*/
extern int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr);
#else
/* Should never be called */
static inline int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
return -EINVAL;
}
#endif
/* May be defined in arch */
extern int ftrace_arch_read_dyn_info(char *buf, int size);
......@@ -387,7 +520,7 @@ extern int skip_trace(unsigned long ip);
extern void ftrace_disable_daemon(void);
extern void ftrace_enable_daemon(void);
#else
#else /* CONFIG_DYNAMIC_FTRACE */
static inline int skip_trace(unsigned long ip) { return 0; }
static inline int ftrace_force_update(void) { return 0; }
static inline void ftrace_disable_daemon(void) { }
......@@ -405,6 +538,10 @@ static inline int ftrace_text_reserved(void *start, void *end)
{
return 0;
}
static inline unsigned long ftrace_location(unsigned long ip)
{
return 0;
}
/*
* Again users of functions that have ftrace_ops may not
......@@ -413,6 +550,7 @@ static inline int ftrace_text_reserved(void *start, void *end)
*/
#define ftrace_regex_open(ops, flag, inod, file) ({ -ENODEV; })
#define ftrace_set_early_filter(ops, buf, enable) do { } while (0)
#define ftrace_set_filter_ip(ops, ip, remove, reset) ({ -ENODEV; })
#define ftrace_set_filter(ops, buf, len, reset) ({ -ENODEV; })
#define ftrace_set_notrace(ops, buf, len, reset) ({ -ENODEV; })
#define ftrace_free_filter(ops) do { } while (0)
......
include/linux/kprobes.h
浏览文件 @ 7e92daae
......@@ -38,6 +38,7 @@
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <linux/mutex.h>
#include <linux/ftrace.h>
#ifdef CONFIG_KPROBES
#include <asm/kprobes.h>
......@@ -48,14 +49,26 @@
#define KPROBE_REENTER 0x00000004
#define KPROBE_HIT_SSDONE 0x00000008
/*
* If function tracer is enabled and the arch supports full
* passing of pt_regs to function tracing, then kprobes can
* optimize on top of function tracing.
*/
#if defined(CONFIG_FUNCTION_TRACER) && defined(ARCH_SUPPORTS_FTRACE_SAVE_REGS) \
&& defined(ARCH_SUPPORTS_KPROBES_ON_FTRACE)
# define KPROBES_CAN_USE_FTRACE
#endif
/* Attach to insert probes on any functions which should be ignored*/
#define __kprobes __attribute__((__section__(".kprobes.text")))
#else /* CONFIG_KPROBES */
typedef int kprobe_opcode_t;
struct arch_specific_insn {
int dummy;
};
#define __kprobes
#endif /* CONFIG_KPROBES */
struct kprobe;
......@@ -128,6 +141,7 @@ struct kprobe {
* NOTE:
* this flag is only for optimized_kprobe.
*/
#define KPROBE_FLAG_FTRACE 8 /* probe is using ftrace */
/* Has this kprobe gone ? */
static inline int kprobe_gone(struct kprobe *p)
......@@ -146,6 +160,13 @@ static inline int kprobe_optimized(struct kprobe *p)
{
return p->flags & KPROBE_FLAG_OPTIMIZED;
}
/* Is this kprobe uses ftrace ? */
static inline int kprobe_ftrace(struct kprobe *p)
{
return p->flags & KPROBE_FLAG_FTRACE;
}
/*
* Special probe type that uses setjmp-longjmp type tricks to resume
* execution at a specified entry with a matching prototype corresponding
......@@ -295,6 +316,12 @@ extern int proc_kprobes_optimization_handler(struct ctl_table *table,
#endif
#endif /* CONFIG_OPTPROBES */
#ifdef KPROBES_CAN_USE_FTRACE
extern void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *ops, struct pt_regs *regs);
extern int arch_prepare_kprobe_ftrace(struct kprobe *p);
#endif
/* Get the kprobe at this addr (if any) - called with preemption disabled */
struct kprobe *get_kprobe(void *addr);
......
include/linux/perf_event.h
浏览文件 @ 7e92daae
......@@ -130,8 +130,10 @@ enum perf_event_sample_format {
PERF_SAMPLE_STREAM_ID = 1U << 9,
PERF_SAMPLE_RAW = 1U << 10,
PERF_SAMPLE_BRANCH_STACK = 1U << 11,
PERF_SAMPLE_REGS_USER = 1U << 12,
PERF_SAMPLE_STACK_USER = 1U << 13,
PERF_SAMPLE_MAX = 1U << 12, /* non-ABI */
PERF_SAMPLE_MAX = 1U << 14, /* non-ABI */
};
/*
......@@ -162,6 +164,15 @@ enum perf_branch_sample_type {
PERF_SAMPLE_BRANCH_KERNEL|\
PERF_SAMPLE_BRANCH_HV)
/*
* Values to determine ABI of the registers dump.
*/
enum perf_sample_regs_abi {
PERF_SAMPLE_REGS_ABI_NONE = 0,
PERF_SAMPLE_REGS_ABI_32 = 1,
PERF_SAMPLE_REGS_ABI_64 = 2,
};
/*
* The format of the data returned by read() on a perf event fd,
* as specified by attr.read_format:
......@@ -194,6 +205,8 @@ enum perf_event_read_format {
#define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */
#define PERF_ATTR_SIZE_VER1 72 /* add: config2 */
#define PERF_ATTR_SIZE_VER2 80 /* add: branch_sample_type */
#define PERF_ATTR_SIZE_VER3 96 /* add: sample_regs_user */
/* add: sample_stack_user */
/*
* Hardware event_id to monitor via a performance monitoring event:
......@@ -255,7 +268,10 @@ struct perf_event_attr {
exclude_host : 1, /* don't count in host */
exclude_guest : 1, /* don't count in guest */
__reserved_1 : 43;
exclude_callchain_kernel : 1, /* exclude kernel callchains */
exclude_callchain_user : 1, /* exclude user callchains */
__reserved_1 : 41;
union {
__u32 wakeup_events; /* wakeup every n events */
......@@ -271,7 +287,21 @@ struct perf_event_attr {
__u64 bp_len;
__u64 config2; /* extension of config1 */
};
__u64 branch_sample_type; /* enum branch_sample_type */
__u64 branch_sample_type; /* enum perf_branch_sample_type */
/*
* Defines set of user regs to dump on samples.
* See asm/perf_regs.h for details.
*/
__u64 sample_regs_user;
/*
* Defines size of the user stack to dump on samples.
*/
__u32 sample_stack_user;
/* Align to u64. */
__u32 __reserved_2;
};
#define perf_flags(attr) (*(&(attr)->read_format + 1))
......@@ -550,6 +580,13 @@ enum perf_event_type {
* char data[size];}&& PERF_SAMPLE_RAW
*
* { u64 from, to, flags } lbr[nr];} && PERF_SAMPLE_BRANCH_STACK
*
* { u64 abi; # enum perf_sample_regs_abi
* u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_USER
*
* { u64 size;
* char data[size];
* u64 dyn_size; } && PERF_SAMPLE_STACK_USER
* };
*/
PERF_RECORD_SAMPLE = 9,
......@@ -611,6 +648,7 @@ struct perf_guest_info_callbacks {
#include <linux/static_key.h>
#include <linux/atomic.h>
#include <linux/sysfs.h>
#include <linux/perf_regs.h>
#include <asm/local.h>
struct perf_callchain_entry {
......@@ -656,6 +694,11 @@ struct perf_branch_stack {
struct perf_branch_entry entries[0];
};
struct perf_regs_user {
__u64 abi;
struct pt_regs *regs;
};
struct task_struct;
/*
......@@ -1135,6 +1178,8 @@ struct perf_sample_data {
struct perf_callchain_entry *callchain;
struct perf_raw_record *raw;
struct perf_branch_stack *br_stack;
struct perf_regs_user regs_user;
u64 stack_user_size;
};
static inline void perf_sample_data_init(struct perf_sample_data *data,
......@@ -1144,7 +1189,10 @@ static inline void perf_sample_data_init(struct perf_sample_data *data,
data->addr = addr;
data->raw = NULL;
data->br_stack = NULL;
data->period = period;
data->period = period;
data->regs_user.abi = PERF_SAMPLE_REGS_ABI_NONE;
data->regs_user.regs = NULL;
data->stack_user_size = 0;
}
extern void perf_output_sample(struct perf_output_handle *handle,
......@@ -1292,8 +1340,10 @@ static inline bool has_branch_stack(struct perf_event *event)
extern int perf_output_begin(struct perf_output_handle *handle,
struct perf_event *event, unsigned int size);
extern void perf_output_end(struct perf_output_handle *handle);
extern void perf_output_copy(struct perf_output_handle *handle,
extern unsigned int perf_output_copy(struct perf_output_handle *handle,
const void *buf, unsigned int len);
extern unsigned int perf_output_skip(struct perf_output_handle *handle,
unsigned int len);
extern int perf_swevent_get_recursion_context(void);
extern void perf_swevent_put_recursion_context(int rctx);
extern void perf_event_enable(struct perf_event *event);
......
include/linux/perf_regs.h 0 → 100644
浏览文件 @ 7e92daae
#ifndef _LINUX_PERF_REGS_H
#define _LINUX_PERF_REGS_H
#ifdef CONFIG_HAVE_PERF_REGS
#include <asm/perf_regs.h>
u64 perf_reg_value(struct pt_regs *regs, int idx);
int perf_reg_validate(u64 mask);
u64 perf_reg_abi(struct task_struct *task);
#else
static inline u64 perf_reg_value(struct pt_regs *regs, int idx)
{
return 0;
}
static inline int perf_reg_validate(u64 mask)
{
return mask ? -ENOSYS : 0;
}
static inline u64 perf_reg_abi(struct task_struct *task)
{
return PERF_SAMPLE_REGS_ABI_NONE;
}
#endif /* CONFIG_HAVE_PERF_REGS */
#endif /* _LINUX_PERF_REGS_H */
include/linux/sched.h
浏览文件 @ 7e92daae
......@@ -446,6 +446,9 @@ extern int get_dumpable(struct mm_struct *mm);
#define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */
#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
#define MMF_HAS_UPROBES 19 /* has uprobes */
#define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */
#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)
struct sighand_struct {
......
include/linux/uprobes.h
浏览文件 @ 7e92daae
......@@ -99,25 +99,27 @@ struct xol_area {
struct uprobes_state {
struct xol_area *xol_area;
atomic_t count;
};
extern int __weak set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
extern int __weak set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr, bool verify);
extern int __weak set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
extern bool __weak is_swbp_insn(uprobe_opcode_t *insn);
extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
extern int uprobe_mmap(struct vm_area_struct *vma);
extern void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end);
extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm);
extern void uprobe_free_utask(struct task_struct *t);
extern void uprobe_copy_process(struct task_struct *t);
extern unsigned long __weak uprobe_get_swbp_addr(struct pt_regs *regs);
extern void __weak arch_uprobe_enable_step(struct arch_uprobe *arch);
extern void __weak arch_uprobe_disable_step(struct arch_uprobe *arch);
extern int uprobe_post_sstep_notifier(struct pt_regs *regs);
extern int uprobe_pre_sstep_notifier(struct pt_regs *regs);
extern void uprobe_notify_resume(struct pt_regs *regs);
extern bool uprobe_deny_signal(void);
extern bool __weak arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs);
extern void uprobe_clear_state(struct mm_struct *mm);
extern void uprobe_reset_state(struct mm_struct *mm);
#else /* !CONFIG_UPROBES */
struct uprobes_state {
};
......@@ -138,6 +140,10 @@ static inline void
uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
}
static inline void
uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
{
}
static inline void uprobe_notify_resume(struct pt_regs *regs)
{
}
......@@ -158,8 +164,5 @@ static inline void uprobe_copy_process(struct task_struct *t)
static inline void uprobe_clear_state(struct mm_struct *mm)
{
}
static inline void uprobe_reset_state(struct mm_struct *mm)
{
}
#endif /* !CONFIG_UPROBES */
#endif /* _LINUX_UPROBES_H */
kernel/Makefile
浏览文件 @ 7e92daae
......@@ -97,7 +97,7 @@ obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_TRACE_CLOCK) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_IRQ_WORK) += irq_work.o
......
kernel/events/callchain.c
浏览文件 @ 7e92daae
......@@ -159,6 +159,11 @@ perf_callchain(struct perf_event *event, struct pt_regs *regs)
int rctx;
struct perf_callchain_entry *entry;
int kernel = !event->attr.exclude_callchain_kernel;
int user = !event->attr.exclude_callchain_user;
if (!kernel && !user)
return NULL;
entry = get_callchain_entry(&rctx);
if (rctx == -1)
......@@ -169,24 +174,29 @@ perf_callchain(struct perf_event *event, struct pt_regs *regs)
entry->nr = 0;
if (!user_mode(regs)) {
if (kernel && !user_mode(regs)) {
perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
perf_callchain_kernel(entry, regs);
if (current->mm)
regs = task_pt_regs(current);
else
regs = NULL;
}
if (regs) {
/*
* Disallow cross-task user callchains.
*/
if (event->ctx->task && event->ctx->task != current)
goto exit_put;
perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_user(entry, regs);
if (user) {
if (!user_mode(regs)) {
if (current->mm)
regs = task_pt_regs(current);
else
regs = NULL;
}
if (regs) {
/*
* Disallow cross-task user callchains.
*/
if (event->ctx->task && event->ctx->task != current)
goto exit_put;
perf_callchain_store(entry, PERF_CONTEXT_USER);
perf_callchain_user(entry, regs);
}
}
exit_put:
......
kernel/events/core.c
浏览文件 @ 7e92daae
......@@ -36,6 +36,7 @@
#include <linux/perf_event.h>
#include <linux/ftrace_event.h>
#include <linux/hw_breakpoint.h>
#include <linux/mm_types.h>
#include "internal.h"
......@@ -3764,6 +3765,132 @@ int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
}
EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
static void
perf_output_sample_regs(struct perf_output_handle *handle,
struct pt_regs *regs, u64 mask)
{
int bit;
for_each_set_bit(bit, (const unsigned long *) &mask,
sizeof(mask) * BITS_PER_BYTE) {
u64 val;
val = perf_reg_value(regs, bit);
perf_output_put(handle, val);
}
}
static void perf_sample_regs_user(struct perf_regs_user *regs_user,
struct pt_regs *regs)
{
if (!user_mode(regs)) {
if (current->mm)
regs = task_pt_regs(current);
else
regs = NULL;
}
if (regs) {
regs_user->regs = regs;
regs_user->abi = perf_reg_abi(current);
}
}
/*
* Get remaining task size from user stack pointer.
*
* It'd be better to take stack vma map and limit this more
* precisly, but there's no way to get it safely under interrupt,
* so using TASK_SIZE as limit.
*/
static u64 perf_ustack_task_size(struct pt_regs *regs)
{
unsigned long addr = perf_user_stack_pointer(regs);
if (!addr || addr >= TASK_SIZE)
return 0;
return TASK_SIZE - addr;
}
static u16
perf_sample_ustack_size(u16 stack_size, u16 header_size,
struct pt_regs *regs)
{
u64 task_size;
/* No regs, no stack pointer, no dump. */
if (!regs)
return 0;
/*
* Check if we fit in with the requested stack size into the:
* - TASK_SIZE
* If we don't, we limit the size to the TASK_SIZE.
*
* - remaining sample size
* If we don't, we customize the stack size to
* fit in to the remaining sample size.
*/
task_size = min((u64) USHRT_MAX, perf_ustack_task_size(regs));
stack_size = min(stack_size, (u16) task_size);
/* Current header size plus static size and dynamic size. */
header_size += 2 * sizeof(u64);
/* Do we fit in with the current stack dump size? */
if ((u16) (header_size + stack_size) < header_size) {
/*
* If we overflow the maximum size for the sample,
* we customize the stack dump size to fit in.
*/
stack_size = USHRT_MAX - header_size - sizeof(u64);
stack_size = round_up(stack_size, sizeof(u64));
}
return stack_size;
}
static void
perf_output_sample_ustack(struct perf_output_handle *handle, u64 dump_size,
struct pt_regs *regs)
{
/* Case of a kernel thread, nothing to dump */
if (!regs) {
u64 size = 0;
perf_output_put(handle, size);
} else {
unsigned long sp;
unsigned int rem;
u64 dyn_size;
/*
* We dump:
* static size
* - the size requested by user or the best one we can fit
* in to the sample max size
* data
* - user stack dump data
* dynamic size
* - the actual dumped size
*/
/* Static size. */
perf_output_put(handle, dump_size);
/* Data. */
sp = perf_user_stack_pointer(regs);
rem = __output_copy_user(handle, (void *) sp, dump_size);
dyn_size = dump_size - rem;
perf_output_skip(handle, rem);
/* Dynamic size. */
perf_output_put(handle, dyn_size);
}
}
static void __perf_event_header__init_id(struct perf_event_header *header,
struct perf_sample_data *data,
struct perf_event *event)
......@@ -4024,6 +4151,28 @@ void perf_output_sample(struct perf_output_handle *handle,
perf_output_put(handle, nr);
}
}
if (sample_type & PERF_SAMPLE_REGS_USER) {
u64 abi = data->regs_user.abi;
/*
* If there are no regs to dump, notice it through
* first u64 being zero (PERF_SAMPLE_REGS_ABI_NONE).
*/
perf_output_put(handle, abi);
if (abi) {
u64 mask = event->attr.sample_regs_user;
perf_output_sample_regs(handle,
data->regs_user.regs,
mask);
}
}
if (sample_type & PERF_SAMPLE_STACK_USER)
perf_output_sample_ustack(handle,
data->stack_user_size,
data->regs_user.regs);
}
void perf_prepare_sample(struct perf_event_header *header,
......@@ -4075,6 +4224,49 @@ void perf_prepare_sample(struct perf_event_header *header,
}
header->size += size;
}
if (sample_type & PERF_SAMPLE_REGS_USER) {
/* regs dump ABI info */
int size = sizeof(u64);
perf_sample_regs_user(&data->regs_user, regs);
if (data->regs_user.regs) {
u64 mask = event->attr.sample_regs_user;
size += hweight64(mask) * sizeof(u64);
}
header->size += size;
}
if (sample_type & PERF_SAMPLE_STACK_USER) {
/*
* Either we need PERF_SAMPLE_STACK_USER bit to be allways
* processed as the last one or have additional check added
* in case new sample type is added, because we could eat
* up the rest of the sample size.
*/
struct perf_regs_user *uregs = &data->regs_user;
u16 stack_size = event->attr.sample_stack_user;
u16 size = sizeof(u64);
if (!uregs->abi)
perf_sample_regs_user(uregs, regs);
stack_size = perf_sample_ustack_size(stack_size, header->size,
uregs->regs);
/*
* If there is something to dump, add space for the dump
* itself and for the field that tells the dynamic size,
* which is how many have been actually dumped.
*/
if (stack_size)
size += sizeof(u64) + stack_size;
data->stack_user_size = stack_size;
header->size += size;
}
}
static void perf_event_output(struct perf_event *event,
......@@ -6151,6 +6343,28 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
attr->branch_sample_type = mask;
}
}
if (attr->sample_type & PERF_SAMPLE_REGS_USER) {
ret = perf_reg_validate(attr->sample_regs_user);
if (ret)
return ret;
}
if (attr->sample_type & PERF_SAMPLE_STACK_USER) {
if (!arch_perf_have_user_stack_dump())
return -ENOSYS;
/*
* We have __u32 type for the size, but so far
* we can only use __u16 as maximum due to the
* __u16 sample size limit.
*/
if (attr->sample_stack_user >= USHRT_MAX)
ret = -EINVAL;
else if (!IS_ALIGNED(attr->sample_stack_user, sizeof(u64)))
ret = -EINVAL;
}
out:
return ret;
......
kernel/events/internal.h
浏览文件 @ 7e92daae
......@@ -2,6 +2,7 @@
#define _KERNEL_EVENTS_INTERNAL_H
#include <linux/hardirq.h>
#include <linux/uaccess.h>
/* Buffer handling */
......@@ -76,30 +77,53 @@ static inline unsigned long perf_data_size(struct ring_buffer *rb)
return rb->nr_pages << (PAGE_SHIFT + page_order(rb));
}
static inline void
__output_copy(struct perf_output_handle *handle,
const void *buf, unsigned int len)
#define DEFINE_OUTPUT_COPY(func_name, memcpy_func) \
static inline unsigned int \
func_name(struct perf_output_handle *handle, \
const void *buf, unsigned int len) \
{ \
unsigned long size, written; \
\
do { \
size = min_t(unsigned long, handle->size, len); \
\
written = memcpy_func(handle->addr, buf, size); \
\
len -= written; \
handle->addr += written; \
buf += written; \
handle->size -= written; \
if (!handle->size) { \
struct ring_buffer *rb = handle->rb; \
\
handle->page++; \
handle->page &= rb->nr_pages - 1; \
handle->addr = rb->data_pages[handle->page]; \
handle->size = PAGE_SIZE << page_order(rb); \
} \
} while (len && written == size); \
\
return len; \
}
static inline int memcpy_common(void *dst, const void *src, size_t n)
{
do {
unsigned long size = min_t(unsigned long, handle->size, len);
memcpy(handle->addr, buf, size);
len -= size;
handle->addr += size;
buf += size;
handle->size -= size;
if (!handle->size) {
struct ring_buffer *rb = handle->rb;
handle->page++;
handle->page &= rb->nr_pages - 1;
handle->addr = rb->data_pages[handle->page];
handle->size = PAGE_SIZE << page_order(rb);
}
} while (len);
memcpy(dst, src, n);
return n;
}
DEFINE_OUTPUT_COPY(__output_copy, memcpy_common)
#define MEMCPY_SKIP(dst, src, n) (n)
DEFINE_OUTPUT_COPY(__output_skip, MEMCPY_SKIP)
#ifndef arch_perf_out_copy_user
#define arch_perf_out_copy_user __copy_from_user_inatomic
#endif
DEFINE_OUTPUT_COPY(__output_copy_user, arch_perf_out_copy_user)
/* Callchain handling */
extern struct perf_callchain_entry *
perf_callchain(struct perf_event *event, struct pt_regs *regs);
......@@ -134,4 +158,20 @@ static inline void put_recursion_context(int *recursion, int rctx)
recursion[rctx]--;
}
#ifdef CONFIG_HAVE_PERF_USER_STACK_DUMP
static inline bool arch_perf_have_user_stack_dump(void)
{
return true;
}
#define perf_user_stack_pointer(regs) user_stack_pointer(regs)
#else
static inline bool arch_perf_have_user_stack_dump(void)
{
return false;
}
#define perf_user_stack_pointer(regs) 0
#endif /* CONFIG_HAVE_PERF_USER_STACK_DUMP */
#endif /* _KERNEL_EVENTS_INTERNAL_H */
kernel/events/ring_buffer.c
浏览文件 @ 7e92daae
......@@ -182,10 +182,16 @@ int perf_output_begin(struct perf_output_handle *handle,
return -ENOSPC;
}
void perf_output_copy(struct perf_output_handle *handle,
unsigned int perf_output_copy(struct perf_output_handle *handle,
const void *buf, unsigned int len)
{
__output_copy(handle, buf, len);
return __output_copy(handle, buf, len);
}
unsigned int perf_output_skip(struct perf_output_handle *handle,
unsigned int len)
{
return __output_skip(handle, NULL, len);
}
void perf_output_end(struct perf_output_handle *handle)
......
kernel/events/uprobes.c
浏览文件 @ 7e92daae
......@@ -280,12 +280,10 @@ static int read_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_
if (ret <= 0)
return ret;
lock_page(page);
vaddr_new = kmap_atomic(page);
vaddr &= ~PAGE_MASK;
memcpy(opcode, vaddr_new + vaddr, UPROBE_SWBP_INSN_SIZE);
kunmap_atomic(vaddr_new);
unlock_page(page);
put_page(page);
......@@ -334,7 +332,7 @@ int __weak set_swbp(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned
*/
result = is_swbp_at_addr(mm, vaddr);
if (result == 1)
return -EEXIST;
return 0;
if (result)
return result;
......@@ -347,24 +345,22 @@ int __weak set_swbp(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned
* @mm: the probed process address space.
* @auprobe: arch specific probepoint information.
* @vaddr: the virtual address to insert the opcode.
* @verify: if true, verify existance of breakpoint instruction.
*
* For mm @mm, restore the original opcode (opcode) at @vaddr.
* Return 0 (success) or a negative errno.
*/
int __weak
set_orig_insn(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned long vaddr, bool verify)
set_orig_insn(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned long vaddr)
{
if (verify) {
int result;
int result;
result = is_swbp_at_addr(mm, vaddr);
if (!result)
return -EINVAL;
result = is_swbp_at_addr(mm, vaddr);
if (!result)
return -EINVAL;
if (result != 1)
return result;
if (result != 1)
return result;
}
return write_opcode(auprobe, mm, vaddr, *(uprobe_opcode_t *)auprobe->insn);
}
......@@ -415,11 +411,10 @@ static struct uprobe *__find_uprobe(struct inode *inode, loff_t offset)
static struct uprobe *find_uprobe(struct inode *inode, loff_t offset)
{
struct uprobe *uprobe;
unsigned long flags;
spin_lock_irqsave(&uprobes_treelock, flags);
spin_lock(&uprobes_treelock);
uprobe = __find_uprobe(inode, offset);
spin_unlock_irqrestore(&uprobes_treelock, flags);
spin_unlock(&uprobes_treelock);
return uprobe;
}
......@@ -466,12 +461,11 @@ static struct uprobe *__insert_uprobe(struct uprobe *uprobe)
*/
static struct uprobe *insert_uprobe(struct uprobe *uprobe)
{
unsigned long flags;
struct uprobe *u;
spin_lock_irqsave(&uprobes_treelock, flags);
spin_lock(&uprobes_treelock);
u = __insert_uprobe(uprobe);
spin_unlock_irqrestore(&uprobes_treelock, flags);
spin_unlock(&uprobes_treelock);
/* For now assume that the instruction need not be single-stepped */
uprobe->flags |= UPROBE_SKIP_SSTEP;
......@@ -649,6 +643,7 @@ static int
install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm,
struct vm_area_struct *vma, unsigned long vaddr)
{
bool first_uprobe;
int ret;
/*
......@@ -659,7 +654,7 @@ install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm,
* Hence behave as if probe already existed.
*/
if (!uprobe->consumers)
return -EEXIST;
return 0;
if (!(uprobe->flags & UPROBE_COPY_INSN)) {
ret = copy_insn(uprobe, vma->vm_file);
......@@ -681,17 +676,18 @@ install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm,
}
/*
* Ideally, should be updating the probe count after the breakpoint
* has been successfully inserted. However a thread could hit the
* breakpoint we just inserted even before the probe count is
* incremented. If this is the first breakpoint placed, breakpoint
* notifier might ignore uprobes and pass the trap to the thread.
* Hence increment before and decrement on failure.
* set MMF_HAS_UPROBES in advance for uprobe_pre_sstep_notifier(),
* the task can hit this breakpoint right after __replace_page().
*/
atomic_inc(&mm->uprobes_state.count);
first_uprobe = !test_bit(MMF_HAS_UPROBES, &mm->flags);
if (first_uprobe)
set_bit(MMF_HAS_UPROBES, &mm->flags);
ret = set_swbp(&uprobe->arch, mm, vaddr);
if (ret)
atomic_dec(&mm->uprobes_state.count);
if (!ret)
clear_bit(MMF_RECALC_UPROBES, &mm->flags);
else if (first_uprobe)
clear_bit(MMF_HAS_UPROBES, &mm->flags);
return ret;
}
......@@ -699,8 +695,12 @@ install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm,
static void
remove_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, unsigned long vaddr)
{
if (!set_orig_insn(&uprobe->arch, mm, vaddr, true))
atomic_dec(&mm->uprobes_state.count);
/* can happen if uprobe_register() fails */
if (!test_bit(MMF_HAS_UPROBES, &mm->flags))
return;
set_bit(MMF_RECALC_UPROBES, &mm->flags);
set_orig_insn(&uprobe->arch, mm, vaddr);
}
/*
......@@ -710,11 +710,9 @@ remove_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, unsigned long vad
*/
static void delete_uprobe(struct uprobe *uprobe)
{
unsigned long flags;
spin_lock_irqsave(&uprobes_treelock, flags);
spin_lock(&uprobes_treelock);
rb_erase(&uprobe->rb_node, &uprobes_tree);
spin_unlock_irqrestore(&uprobes_treelock, flags);
spin_unlock(&uprobes_treelock);
iput(uprobe->inode);
put_uprobe(uprobe);
atomic_dec(&uprobe_events);
......@@ -831,17 +829,11 @@ static int register_for_each_vma(struct uprobe *uprobe, bool is_register)
vaddr_to_offset(vma, info->vaddr) != uprobe->offset)
goto unlock;
if (is_register) {
if (is_register)
err = install_breakpoint(uprobe, mm, vma, info->vaddr);
/*
* We can race against uprobe_mmap(), see the
* comment near uprobe_hash().
*/
if (err == -EEXIST)
err = 0;
} else {
else
remove_breakpoint(uprobe, mm, info->vaddr);
}
unlock:
up_write(&mm->mmap_sem);
free:
......@@ -908,7 +900,8 @@ int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *
}
mutex_unlock(uprobes_hash(inode));
put_uprobe(uprobe);
if (uprobe)
put_uprobe(uprobe);
return ret;
}
......@@ -978,7 +971,6 @@ static void build_probe_list(struct inode *inode,
struct list_head *head)
{
loff_t min, max;
unsigned long flags;
struct rb_node *n, *t;
struct uprobe *u;
......@@ -986,7 +978,7 @@ static void build_probe_list(struct inode *inode,
min = vaddr_to_offset(vma, start);
max = min + (end - start) - 1;
spin_lock_irqsave(&uprobes_treelock, flags);
spin_lock(&uprobes_treelock);
n = find_node_in_range(inode, min, max);
if (n) {
for (t = n; t; t = rb_prev(t)) {
......@@ -1004,27 +996,20 @@ static void build_probe_list(struct inode *inode,
atomic_inc(&u->ref);
}
}
spin_unlock_irqrestore(&uprobes_treelock, flags);
spin_unlock(&uprobes_treelock);
}
/*
* Called from mmap_region.
* called with mm->mmap_sem acquired.
* Called from mmap_region/vma_adjust with mm->mmap_sem acquired.
*
* Return -ve no if we fail to insert probes and we cannot
* bail-out.
* Return 0 otherwise. i.e:
*
* - successful insertion of probes
* - (or) no possible probes to be inserted.
* - (or) insertion of probes failed but we can bail-out.
* Currently we ignore all errors and always return 0, the callers
* can't handle the failure anyway.
*/
int uprobe_mmap(struct vm_area_struct *vma)
{
struct list_head tmp_list;
struct uprobe *uprobe, *u;
struct inode *inode;
int ret, count;
if (!atomic_read(&uprobe_events) || !valid_vma(vma, true))
return 0;
......@@ -1036,44 +1021,35 @@ int uprobe_mmap(struct vm_area_struct *vma)
mutex_lock(uprobes_mmap_hash(inode));
build_probe_list(inode, vma, vma->vm_start, vma->vm_end, &tmp_list);
ret = 0;
count = 0;
list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) {
if (!ret) {
if (!fatal_signal_pending(current)) {
unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset);
ret = install_breakpoint(uprobe, vma->vm_mm, vma, vaddr);
/*
* We can race against uprobe_register(), see the
* comment near uprobe_hash().
*/
if (ret == -EEXIST) {
ret = 0;
if (!is_swbp_at_addr(vma->vm_mm, vaddr))
continue;
/*
* Unable to insert a breakpoint, but
* breakpoint lies underneath. Increment the
* probe count.
*/
atomic_inc(&vma->vm_mm->uprobes_state.count);
}
if (!ret)
count++;
install_breakpoint(uprobe, vma->vm_mm, vma, vaddr);
}
put_uprobe(uprobe);
}
mutex_unlock(uprobes_mmap_hash(inode));
if (ret)
atomic_sub(count, &vma->vm_mm->uprobes_state.count);
return 0;
}
return ret;
static bool
vma_has_uprobes(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
loff_t min, max;
struct inode *inode;
struct rb_node *n;
inode = vma->vm_file->f_mapping->host;
min = vaddr_to_offset(vma, start);
max = min + (end - start) - 1;
spin_lock(&uprobes_treelock);
n = find_node_in_range(inode, min, max);
spin_unlock(&uprobes_treelock);
return !!n;
}
/*
......@@ -1081,37 +1057,18 @@ int uprobe_mmap(struct vm_area_struct *vma)
*/
void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
struct list_head tmp_list;
struct uprobe *uprobe, *u;
struct inode *inode;
if (!atomic_read(&uprobe_events) || !valid_vma(vma, false))
return;
if (!atomic_read(&vma->vm_mm->mm_users)) /* called by mmput() ? */
return;
if (!atomic_read(&vma->vm_mm->uprobes_state.count))
return;
inode = vma->vm_file->f_mapping->host;
if (!inode)
if (!test_bit(MMF_HAS_UPROBES, &vma->vm_mm->flags) ||
test_bit(MMF_RECALC_UPROBES, &vma->vm_mm->flags))
return;
mutex_lock(uprobes_mmap_hash(inode));
build_probe_list(inode, vma, start, end, &tmp_list);
list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) {
unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset);
/*
* An unregister could have removed the probe before
* unmap. So check before we decrement the count.
*/
if (is_swbp_at_addr(vma->vm_mm, vaddr) == 1)
atomic_dec(&vma->vm_mm->uprobes_state.count);
put_uprobe(uprobe);
}
mutex_unlock(uprobes_mmap_hash(inode));
if (vma_has_uprobes(vma, start, end))
set_bit(MMF_RECALC_UPROBES, &vma->vm_mm->flags);
}
/* Slot allocation for XOL */
......@@ -1213,13 +1170,15 @@ void uprobe_clear_state(struct mm_struct *mm)
kfree(area);
}
/*
* uprobe_reset_state - Free the area allocated for slots.
*/
void uprobe_reset_state(struct mm_struct *mm)
void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
{
mm->uprobes_state.xol_area = NULL;
atomic_set(&mm->uprobes_state.count, 0);
newmm->uprobes_state.xol_area = NULL;
if (test_bit(MMF_HAS_UPROBES, &oldmm->flags)) {
set_bit(MMF_HAS_UPROBES, &newmm->flags);
/* unconditionally, dup_mmap() skips VM_DONTCOPY vmas */
set_bit(MMF_RECALC_UPROBES, &newmm->flags);
}
}
/*
......@@ -1437,6 +1396,25 @@ static bool can_skip_sstep(struct uprobe *uprobe, struct pt_regs *regs)
return false;
}
static void mmf_recalc_uprobes(struct mm_struct *mm)
{
struct vm_area_struct *vma;
for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (!valid_vma(vma, false))
continue;
/*
* This is not strictly accurate, we can race with
* uprobe_unregister() and see the already removed
* uprobe if delete_uprobe() was not yet called.
*/
if (vma_has_uprobes(vma, vma->vm_start, vma->vm_end))
return;
}
clear_bit(MMF_HAS_UPROBES, &mm->flags);
}
static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp)
{
struct mm_struct *mm = current->mm;
......@@ -1458,11 +1436,24 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp)
} else {
*is_swbp = -EFAULT;
}
if (!uprobe && test_and_clear_bit(MMF_RECALC_UPROBES, &mm->flags))
mmf_recalc_uprobes(mm);
up_read(&mm->mmap_sem);
return uprobe;
}
void __weak arch_uprobe_enable_step(struct arch_uprobe *arch)
{
user_enable_single_step(current);
}
void __weak arch_uprobe_disable_step(struct arch_uprobe *arch)
{
user_disable_single_step(current);
}
/*
* Run handler and ask thread to singlestep.
* Ensure all non-fatal signals cannot interrupt thread while it singlesteps.
......@@ -1509,7 +1500,7 @@ static void handle_swbp(struct pt_regs *regs)
utask->state = UTASK_SSTEP;
if (!pre_ssout(uprobe, regs, bp_vaddr)) {
user_enable_single_step(current);
arch_uprobe_enable_step(&uprobe->arch);
return;
}
......@@ -1518,17 +1509,15 @@ static void handle_swbp(struct pt_regs *regs)
utask->active_uprobe = NULL;
utask->state = UTASK_RUNNING;
}
if (uprobe) {
if (!(uprobe->flags & UPROBE_SKIP_SSTEP))
if (!(uprobe->flags & UPROBE_SKIP_SSTEP))
/*
* cannot singlestep; cannot skip instruction;
* re-execute the instruction.
*/
instruction_pointer_set(regs, bp_vaddr);
/*
* cannot singlestep; cannot skip instruction;
* re-execute the instruction.
*/
instruction_pointer_set(regs, bp_vaddr);
put_uprobe(uprobe);
}
put_uprobe(uprobe);
}
/*
......@@ -1547,10 +1536,10 @@ static void handle_singlestep(struct uprobe_task *utask, struct pt_regs *regs)
else
WARN_ON_ONCE(1);
arch_uprobe_disable_step(&uprobe->arch);
put_uprobe(uprobe);
utask->active_uprobe = NULL;
utask->state = UTASK_RUNNING;
user_disable_single_step(current);
xol_free_insn_slot(current);
spin_lock_irq(&current->sighand->siglock);
......@@ -1589,8 +1578,7 @@ int uprobe_pre_sstep_notifier(struct pt_regs *regs)
{
struct uprobe_task *utask;
if (!current->mm || !atomic_read(&current->mm->uprobes_state.count))
/* task is currently not uprobed */
if (!current->mm || !test_bit(MMF_HAS_UPROBES, &current->mm->flags))
return 0;
utask = current->utask;
......
kernel/fork.c
浏览文件 @ 7e92daae
......@@ -353,6 +353,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
down_write(&oldmm->mmap_sem);
flush_cache_dup_mm(oldmm);
uprobe_dup_mmap(oldmm, mm);
/*
* Not linked in yet - no deadlock potential:
*/
......@@ -454,9 +455,6 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
if (retval)
goto out;
if (file)
uprobe_mmap(tmp);
}
/* a new mm has just been created */
arch_dup_mmap(oldmm, mm);
......@@ -839,8 +837,6 @@ struct mm_struct *dup_mm(struct task_struct *tsk)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
mm->pmd_huge_pte = NULL;
#endif
uprobe_reset_state(mm);
if (!mm_init(mm, tsk))
goto fail_nomem;
......
kernel/kprobes.c
浏览文件 @ 7e92daae
......@@ -561,9 +561,9 @@ static __kprobes void kprobe_optimizer(struct work_struct *work)
{
LIST_HEAD(free_list);
mutex_lock(&kprobe_mutex);
/* Lock modules while optimizing kprobes */
mutex_lock(&module_mutex);
mutex_lock(&kprobe_mutex);
/*
* Step 1: Unoptimize kprobes and collect cleaned (unused and disarmed)
......@@ -586,8 +586,8 @@ static __kprobes void kprobe_optimizer(struct work_struct *work)
/* Step 4: Free cleaned kprobes after quiesence period */
do_free_cleaned_kprobes(&free_list);
mutex_unlock(&kprobe_mutex);
mutex_unlock(&module_mutex);
mutex_unlock(&kprobe_mutex);
/* Step 5: Kick optimizer again if needed */
if (!list_empty(&optimizing_list) || !list_empty(&unoptimizing_list))
......@@ -759,20 +759,32 @@ static __kprobes void try_to_optimize_kprobe(struct kprobe *p)
struct kprobe *ap;
struct optimized_kprobe *op;
/* Impossible to optimize ftrace-based kprobe */
if (kprobe_ftrace(p))
return;
/* For preparing optimization, jump_label_text_reserved() is called */
jump_label_lock();
mutex_lock(&text_mutex);
ap = alloc_aggr_kprobe(p);
if (!ap)
return;
goto out;
op = container_of(ap, struct optimized_kprobe, kp);
if (!arch_prepared_optinsn(&op->optinsn)) {
/* If failed to setup optimizing, fallback to kprobe */
arch_remove_optimized_kprobe(op);
kfree(op);
return;
goto out;
}
init_aggr_kprobe(ap, p);
optimize_kprobe(ap);
optimize_kprobe(ap); /* This just kicks optimizer thread */
out:
mutex_unlock(&text_mutex);
jump_label_unlock();
}
#ifdef CONFIG_SYSCTL
......@@ -907,9 +919,64 @@ static __kprobes struct kprobe *alloc_aggr_kprobe(struct kprobe *p)
}
#endif /* CONFIG_OPTPROBES */
#ifdef KPROBES_CAN_USE_FTRACE
static struct ftrace_ops kprobe_ftrace_ops __read_mostly = {
.func = kprobe_ftrace_handler,
.flags = FTRACE_OPS_FL_SAVE_REGS,
};
static int kprobe_ftrace_enabled;
/* Must ensure p->addr is really on ftrace */
static int __kprobes prepare_kprobe(struct kprobe *p)
{
if (!kprobe_ftrace(p))
return arch_prepare_kprobe(p);
return arch_prepare_kprobe_ftrace(p);
}
/* Caller must lock kprobe_mutex */
static void __kprobes arm_kprobe_ftrace(struct kprobe *p)
{
int ret;
ret = ftrace_set_filter_ip(&kprobe_ftrace_ops,
(unsigned long)p->addr, 0, 0);
WARN(ret < 0, "Failed to arm kprobe-ftrace at %p (%d)\n", p->addr, ret);
kprobe_ftrace_enabled++;
if (kprobe_ftrace_enabled == 1) {
ret = register_ftrace_function(&kprobe_ftrace_ops);
WARN(ret < 0, "Failed to init kprobe-ftrace (%d)\n", ret);
}
}
/* Caller must lock kprobe_mutex */
static void __kprobes disarm_kprobe_ftrace(struct kprobe *p)
{
int ret;
kprobe_ftrace_enabled--;
if (kprobe_ftrace_enabled == 0) {
ret = unregister_ftrace_function(&kprobe_ftrace_ops);
WARN(ret < 0, "Failed to init kprobe-ftrace (%d)\n", ret);
}
ret = ftrace_set_filter_ip(&kprobe_ftrace_ops,
(unsigned long)p->addr, 1, 0);
WARN(ret < 0, "Failed to disarm kprobe-ftrace at %p (%d)\n", p->addr, ret);
}
#else /* !KPROBES_CAN_USE_FTRACE */
#define prepare_kprobe(p) arch_prepare_kprobe(p)
#define arm_kprobe_ftrace(p) do {} while (0)
#define disarm_kprobe_ftrace(p) do {} while (0)
#endif
/* Arm a kprobe with text_mutex */
static void __kprobes arm_kprobe(struct kprobe *kp)
{
if (unlikely(kprobe_ftrace(kp))) {
arm_kprobe_ftrace(kp);
return;
}
/*
* Here, since __arm_kprobe() doesn't use stop_machine(),
* this doesn't cause deadlock on text_mutex. So, we don't
......@@ -921,11 +988,15 @@ static void __kprobes arm_kprobe(struct kprobe *kp)
}
/* Disarm a kprobe with text_mutex */
static void __kprobes disarm_kprobe(struct kprobe *kp)
static void __kprobes disarm_kprobe(struct kprobe *kp, bool reopt)
{
if (unlikely(kprobe_ftrace(kp))) {
disarm_kprobe_ftrace(kp);
return;
}
/* Ditto */
mutex_lock(&text_mutex);
__disarm_kprobe(kp, true);
__disarm_kprobe(kp, reopt);
mutex_unlock(&text_mutex);
}
......@@ -1144,12 +1215,6 @@ static int __kprobes add_new_kprobe(struct kprobe *ap, struct kprobe *p)
if (p->post_handler && !ap->post_handler)
ap->post_handler = aggr_post_handler;
if (kprobe_disabled(ap) && !kprobe_disabled(p)) {
ap->flags &= ~KPROBE_FLAG_DISABLED;
if (!kprobes_all_disarmed)
/* Arm the breakpoint again. */
__arm_kprobe(ap);
}
return 0;
}
......@@ -1189,11 +1254,22 @@ static int __kprobes register_aggr_kprobe(struct kprobe *orig_p,
int ret = 0;
struct kprobe *ap = orig_p;
/* For preparing optimization, jump_label_text_reserved() is called */
jump_label_lock();
/*
* Get online CPUs to avoid text_mutex deadlock.with stop machine,
* which is invoked by unoptimize_kprobe() in add_new_kprobe()
*/
get_online_cpus();
mutex_lock(&text_mutex);
if (!kprobe_aggrprobe(orig_p)) {
/* If orig_p is not an aggr_kprobe, create new aggr_kprobe. */
ap = alloc_aggr_kprobe(orig_p);
if (!ap)
return -ENOMEM;
if (!ap) {
ret = -ENOMEM;
goto out;
}
init_aggr_kprobe(ap, orig_p);
} else if (kprobe_unused(ap))
/* This probe is going to die. Rescue it */
......@@ -1213,7 +1289,7 @@ static int __kprobes register_aggr_kprobe(struct kprobe *orig_p,
* free aggr_probe. It will be used next time, or
* freed by unregister_kprobe.
*/
return ret;
goto out;
/* Prepare optimized instructions if possible. */
prepare_optimized_kprobe(ap);
......@@ -1228,7 +1304,20 @@ static int __kprobes register_aggr_kprobe(struct kprobe *orig_p,
/* Copy ap's insn slot to p */
copy_kprobe(ap, p);
return add_new_kprobe(ap, p);
ret = add_new_kprobe(ap, p);
out:
mutex_unlock(&text_mutex);
put_online_cpus();
jump_label_unlock();
if (ret == 0 && kprobe_disabled(ap) && !kprobe_disabled(p)) {
ap->flags &= ~KPROBE_FLAG_DISABLED;
if (!kprobes_all_disarmed)
/* Arm the breakpoint again. */
arm_kprobe(ap);
}
return ret;
}
static int __kprobes in_kprobes_functions(unsigned long addr)
......@@ -1313,71 +1402,96 @@ static inline int check_kprobe_rereg(struct kprobe *p)
return ret;
}
int __kprobes register_kprobe(struct kprobe *p)
static __kprobes int check_kprobe_address_safe(struct kprobe *p,
struct module **probed_mod)
{
int ret = 0;
struct kprobe *old_p;
struct module *probed_mod;
kprobe_opcode_t *addr;
addr = kprobe_addr(p);
if (IS_ERR(addr))
return PTR_ERR(addr);
p->addr = addr;
unsigned long ftrace_addr;
ret = check_kprobe_rereg(p);
if (ret)
return ret;
/*
* If the address is located on a ftrace nop, set the
* breakpoint to the following instruction.
*/
ftrace_addr = ftrace_location((unsigned long)p->addr);
if (ftrace_addr) {
#ifdef KPROBES_CAN_USE_FTRACE
/* Given address is not on the instruction boundary */
if ((unsigned long)p->addr != ftrace_addr)
return -EILSEQ;
p->flags |= KPROBE_FLAG_FTRACE;
#else /* !KPROBES_CAN_USE_FTRACE */
return -EINVAL;
#endif
}
jump_label_lock();
preempt_disable();
/* Ensure it is not in reserved area nor out of text */
if (!kernel_text_address((unsigned long) p->addr) ||
in_kprobes_functions((unsigned long) p->addr) ||
ftrace_text_reserved(p->addr, p->addr) ||
jump_label_text_reserved(p->addr, p->addr)) {
ret = -EINVAL;
goto cannot_probe;
goto out;
}
/* User can pass only KPROBE_FLAG_DISABLED to register_kprobe */
p->flags &= KPROBE_FLAG_DISABLED;
/*
* Check if are we probing a module.
*/
probed_mod = __module_text_address((unsigned long) p->addr);
if (probed_mod) {
/* Return -ENOENT if fail. */
ret = -ENOENT;
/* Check if are we probing a module */
*probed_mod = __module_text_address((unsigned long) p->addr);
if (*probed_mod) {
/*
* We must hold a refcount of the probed module while updating
* its code to prohibit unexpected unloading.
*/
if (unlikely(!try_module_get(probed_mod)))
goto cannot_probe;
if (unlikely(!try_module_get(*probed_mod))) {
ret = -ENOENT;
goto out;
}
/*
* If the module freed .init.text, we couldn't insert
* kprobes in there.
*/
if (within_module_init((unsigned long)p->addr, probed_mod) &&
probed_mod->state != MODULE_STATE_COMING) {
module_put(probed_mod);
goto cannot_probe;
if (within_module_init((unsigned long)p->addr, *probed_mod) &&
(*probed_mod)->state != MODULE_STATE_COMING) {
module_put(*probed_mod);
*probed_mod = NULL;
ret = -ENOENT;
}
/* ret will be updated by following code */
}
out:
preempt_enable();
jump_label_unlock();
return ret;
}
int __kprobes register_kprobe(struct kprobe *p)
{
int ret;
struct kprobe *old_p;
struct module *probed_mod;
kprobe_opcode_t *addr;
/* Adjust probe address from symbol */
addr = kprobe_addr(p);
if (IS_ERR(addr))
return PTR_ERR(addr);
p->addr = addr;
ret = check_kprobe_rereg(p);
if (ret)
return ret;
/* User can pass only KPROBE_FLAG_DISABLED to register_kprobe */
p->flags &= KPROBE_FLAG_DISABLED;
p->nmissed = 0;
INIT_LIST_HEAD(&p->list);
mutex_lock(&kprobe_mutex);
jump_label_lock(); /* needed to call jump_label_text_reserved() */
ret = check_kprobe_address_safe(p, &probed_mod);
if (ret)
return ret;
get_online_cpus(); /* For avoiding text_mutex deadlock. */
mutex_lock(&text_mutex);
mutex_lock(&kprobe_mutex);
old_p = get_kprobe(p->addr);
if (old_p) {
......@@ -1386,7 +1500,9 @@ int __kprobes register_kprobe(struct kprobe *p)
goto out;
}
ret = arch_prepare_kprobe(p);
mutex_lock(&text_mutex); /* Avoiding text modification */
ret = prepare_kprobe(p);
mutex_unlock(&text_mutex);
if (ret)
goto out;
......@@ -1395,26 +1511,18 @@ int __kprobes register_kprobe(struct kprobe *p)
&kprobe_table[hash_ptr(p->addr, KPROBE_HASH_BITS)]);
if (!kprobes_all_disarmed && !kprobe_disabled(p))
__arm_kprobe(p);
arm_kprobe(p);
/* Try to optimize kprobe */
try_to_optimize_kprobe(p);
out:
mutex_unlock(&text_mutex);
put_online_cpus();
jump_label_unlock();
mutex_unlock(&kprobe_mutex);
if (probed_mod)
module_put(probed_mod);
return ret;
cannot_probe:
preempt_enable();
jump_label_unlock();
return ret;
}
EXPORT_SYMBOL_GPL(register_kprobe);
......@@ -1451,7 +1559,7 @@ static struct kprobe *__kprobes __disable_kprobe(struct kprobe *p)
/* Try to disarm and disable this/parent probe */
if (p == orig_p || aggr_kprobe_disabled(orig_p)) {
disarm_kprobe(orig_p);
disarm_kprobe(orig_p, true);
orig_p->flags |= KPROBE_FLAG_DISABLED;
}
}
......@@ -2049,10 +2157,11 @@ static void __kprobes report_probe(struct seq_file *pi, struct kprobe *p,
if (!pp)
pp = p;
seq_printf(pi, "%s%s%s\n",
seq_printf(pi, "%s%s%s%s\n",
(kprobe_gone(p) ? "[GONE]" : ""),
((kprobe_disabled(p) && !kprobe_gone(p)) ? "[DISABLED]" : ""),
(kprobe_optimized(pp) ? "[OPTIMIZED]" : ""));
(kprobe_optimized(pp) ? "[OPTIMIZED]" : ""),
(kprobe_ftrace(pp) ? "[FTRACE]" : ""));
}
static void __kprobes *kprobe_seq_start(struct seq_file *f, loff_t *pos)
......@@ -2131,14 +2240,12 @@ static void __kprobes arm_all_kprobes(void)
goto already_enabled;
/* Arming kprobes doesn't optimize kprobe itself */
mutex_lock(&text_mutex);
for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
head = &kprobe_table[i];
hlist_for_each_entry_rcu(p, node, head, hlist)
if (!kprobe_disabled(p))
__arm_kprobe(p);
arm_kprobe(p);
}
mutex_unlock(&text_mutex);
kprobes_all_disarmed = false;
printk(KERN_INFO "Kprobes globally enabled\n");
......@@ -2166,15 +2273,13 @@ static void __kprobes disarm_all_kprobes(void)
kprobes_all_disarmed = true;
printk(KERN_INFO "Kprobes globally disabled\n");
mutex_lock(&text_mutex);
for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
head = &kprobe_table[i];
hlist_for_each_entry_rcu(p, node, head, hlist) {
if (!arch_trampoline_kprobe(p) && !kprobe_disabled(p))
__disarm_kprobe(p, false);
disarm_kprobe(p, false);
}
}
mutex_unlock(&text_mutex);
mutex_unlock(&kprobe_mutex);
/* Wait for disarming all kprobes by optimizer */
......
kernel/trace/Kconfig
浏览文件 @ 7e92daae
......@@ -49,6 +49,11 @@ config HAVE_SYSCALL_TRACEPOINTS
help
See Documentation/trace/ftrace-design.txt
config HAVE_FENTRY
bool
help
Arch supports the gcc options -pg with -mfentry
config HAVE_C_RECORDMCOUNT
bool
help
......@@ -57,8 +62,12 @@ config HAVE_C_RECORDMCOUNT
config TRACER_MAX_TRACE
bool
config TRACE_CLOCK
bool
config RING_BUFFER
bool
select TRACE_CLOCK
config FTRACE_NMI_ENTER
bool
......@@ -109,6 +118,7 @@ config TRACING
select NOP_TRACER
select BINARY_PRINTF
select EVENT_TRACING
select TRACE_CLOCK
config GENERIC_TRACER
bool
......
kernel/trace/Makefile
浏览文件 @ 7e92daae
......@@ -5,10 +5,12 @@ ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
ifdef CONFIG_FTRACE_SELFTEST
# selftest needs instrumentation
CFLAGS_trace_selftest_dynamic.o = -pg
obj-y += trace_selftest_dynamic.o
endif
endif
# If unlikely tracing is enabled, do not trace these files
ifdef CONFIG_TRACING_BRANCHES
......@@ -17,11 +19,7 @@ endif
CFLAGS_trace_events_filter.o := -I$(src)
#
# Make the trace clocks available generally: it's infrastructure
# relied on by ptrace for example:
#
obj-y += trace_clock.o
obj-$(CONFIG_TRACE_CLOCK) += trace_clock.o
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
......
kernel/trace/ftrace.c
浏览文件 @ 7e92daae
......@@ -64,12 +64,20 @@
#define FL_GLOBAL_CONTROL_MASK (FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_CONTROL)
static struct ftrace_ops ftrace_list_end __read_mostly = {
.func = ftrace_stub,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
/* ftrace_enabled is a method to turn ftrace on or off */
int ftrace_enabled __read_mostly;
static int last_ftrace_enabled;
/* Quick disabling of function tracer. */
int function_trace_stop;
int function_trace_stop __read_mostly;
/* Current function tracing op */
struct ftrace_ops *function_trace_op __read_mostly = &ftrace_list_end;
/* List for set_ftrace_pid's pids. */
LIST_HEAD(ftrace_pids);
......@@ -86,22 +94,43 @@ static int ftrace_disabled __read_mostly;
static DEFINE_MUTEX(ftrace_lock);
static struct ftrace_ops ftrace_list_end __read_mostly = {
.func = ftrace_stub,
};
static struct ftrace_ops *ftrace_global_list __read_mostly = &ftrace_list_end;
static struct ftrace_ops *ftrace_control_list __read_mostly = &ftrace_list_end;
static struct ftrace_ops *ftrace_ops_list __read_mostly = &ftrace_list_end;
ftrace_func_t ftrace_trace_function __read_mostly = ftrace_stub;
static ftrace_func_t __ftrace_trace_function_delay __read_mostly = ftrace_stub;
ftrace_func_t __ftrace_trace_function __read_mostly = ftrace_stub;
ftrace_func_t ftrace_pid_function __read_mostly = ftrace_stub;
static struct ftrace_ops global_ops;
static struct ftrace_ops control_ops;
static void
ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip);
#if ARCH_SUPPORTS_FTRACE_OPS
static void ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs);
#else
/* See comment below, where ftrace_ops_list_func is defined */
static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip);
#define ftrace_ops_list_func ((ftrace_func_t)ftrace_ops_no_ops)
#endif
/**
* ftrace_nr_registered_ops - return number of ops registered
*
* Returns the number of ftrace_ops registered and tracing functions
*/
int ftrace_nr_registered_ops(void)
{
struct ftrace_ops *ops;
int cnt = 0;
mutex_lock(&ftrace_lock);
for (ops = ftrace_ops_list;
ops != &ftrace_list_end; ops = ops->next)
cnt++;
mutex_unlock(&ftrace_lock);
return cnt;
}
/*
* Traverse the ftrace_global_list, invoking all entries. The reason that we
......@@ -112,29 +141,29 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip);
*
* Silly Alpha and silly pointer-speculation compiler optimizations!
*/
static void ftrace_global_list_func(unsigned long ip,
unsigned long parent_ip)
static void
ftrace_global_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs)
{
struct ftrace_ops *op;
if (unlikely(trace_recursion_test(TRACE_GLOBAL_BIT)))
return;
trace_recursion_set(TRACE_GLOBAL_BIT);
op = rcu_dereference_raw(ftrace_global_list); /*see above*/
while (op != &ftrace_list_end) {
op->func(ip, parent_ip);
op->func(ip, parent_ip, op, regs);
op = rcu_dereference_raw(op->next); /*see above*/
};
trace_recursion_clear(TRACE_GLOBAL_BIT);
}
static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip)
static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs)
{
if (!test_tsk_trace_trace(current))
return;
ftrace_pid_function(ip, parent_ip);
ftrace_pid_function(ip, parent_ip, op, regs);
}
static void set_ftrace_pid_function(ftrace_func_t func)
......@@ -153,25 +182,9 @@ static void set_ftrace_pid_function(ftrace_func_t func)
void clear_ftrace_function(void)
{
ftrace_trace_function = ftrace_stub;
__ftrace_trace_function = ftrace_stub;
__ftrace_trace_function_delay = ftrace_stub;
ftrace_pid_function = ftrace_stub;
}
#ifndef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST
/*
* For those archs that do not test ftrace_trace_stop in their
* mcount call site, we need to do it from C.
*/
static void ftrace_test_stop_func(unsigned long ip, unsigned long parent_ip)
{
if (function_trace_stop)
return;
__ftrace_trace_function(ip, parent_ip);
}
#endif
static void control_ops_disable_all(struct ftrace_ops *ops)
{
int cpu;
......@@ -230,28 +243,27 @@ static void update_ftrace_function(void)
/*
* If we are at the end of the list and this ops is
* not dynamic, then have the mcount trampoline call
* the function directly
* recursion safe and not dynamic and the arch supports passing ops,
* then have the mcount trampoline call the function directly.
*/
if (ftrace_ops_list == &ftrace_list_end ||
(ftrace_ops_list->next == &ftrace_list_end &&
!(ftrace_ops_list->flags & FTRACE_OPS_FL_DYNAMIC)))
!(ftrace_ops_list->flags & FTRACE_OPS_FL_DYNAMIC) &&
(ftrace_ops_list->flags & FTRACE_OPS_FL_RECURSION_SAFE) &&
!FTRACE_FORCE_LIST_FUNC)) {
/* Set the ftrace_ops that the arch callback uses */
if (ftrace_ops_list == &global_ops)
function_trace_op = ftrace_global_list;
else
function_trace_op = ftrace_ops_list;
func = ftrace_ops_list->func;
else
} else {
/* Just use the default ftrace_ops */
function_trace_op = &ftrace_list_end;
func = ftrace_ops_list_func;
}
#ifdef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST
ftrace_trace_function = func;
#else
#ifdef CONFIG_DYNAMIC_FTRACE
/* do not update till all functions have been modified */
__ftrace_trace_function_delay = func;
#else
__ftrace_trace_function = func;
#endif
ftrace_trace_function =
(func == ftrace_stub) ? func : ftrace_test_stop_func;
#endif
}
static void add_ftrace_ops(struct ftrace_ops **list, struct ftrace_ops *ops)
......@@ -325,6 +337,20 @@ static int __register_ftrace_function(struct ftrace_ops *ops)
if ((ops->flags & FL_GLOBAL_CONTROL_MASK) == FL_GLOBAL_CONTROL_MASK)
return -EINVAL;
#ifndef ARCH_SUPPORTS_FTRACE_SAVE_REGS
/*
* If the ftrace_ops specifies SAVE_REGS, then it only can be used
* if the arch supports it, or SAVE_REGS_IF_SUPPORTED is also set.
* Setting SAVE_REGS_IF_SUPPORTED makes SAVE_REGS irrelevant.
*/
if (ops->flags & FTRACE_OPS_FL_SAVE_REGS &&
!(ops->flags & FTRACE_OPS_FL_SAVE_REGS_IF_SUPPORTED))
return -EINVAL;
if (ops->flags & FTRACE_OPS_FL_SAVE_REGS_IF_SUPPORTED)
ops->flags |= FTRACE_OPS_FL_SAVE_REGS;
#endif
if (!core_kernel_data((unsigned long)ops))
ops->flags |= FTRACE_OPS_FL_DYNAMIC;
......@@ -773,7 +799,8 @@ ftrace_profile_alloc(struct ftrace_profile_stat *stat, unsigned long ip)
}
static void
function_profile_call(unsigned long ip, unsigned long parent_ip)
function_profile_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *ops, struct pt_regs *regs)
{
struct ftrace_profile_stat *stat;
struct ftrace_profile *rec;
......@@ -803,7 +830,7 @@ function_profile_call(unsigned long ip, unsigned long parent_ip)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static int profile_graph_entry(struct ftrace_graph_ent *trace)
{
function_profile_call(trace->func, 0);
function_profile_call(trace->func, 0, NULL, NULL);
return 1;
}
......@@ -863,6 +890,7 @@ static void unregister_ftrace_profiler(void)
#else
static struct ftrace_ops ftrace_profile_ops __read_mostly = {
.func = function_profile_call,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static int register_ftrace_profiler(void)
......@@ -1045,6 +1073,7 @@ static struct ftrace_ops global_ops = {
.func = ftrace_stub,
.notrace_hash = EMPTY_HASH,
.filter_hash = EMPTY_HASH,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static DEFINE_MUTEX(ftrace_regex_lock);
......@@ -1525,6 +1554,12 @@ static void __ftrace_hash_rec_update(struct ftrace_ops *ops,
rec->flags++;
if (FTRACE_WARN_ON((rec->flags & ~FTRACE_FL_MASK) == FTRACE_REF_MAX))
return;
/*
* If any ops wants regs saved for this function
* then all ops will get saved regs.
*/
if (ops->flags & FTRACE_OPS_FL_SAVE_REGS)
rec->flags |= FTRACE_FL_REGS;
} else {
if (FTRACE_WARN_ON((rec->flags & ~FTRACE_FL_MASK) == 0))
return;
......@@ -1616,18 +1651,59 @@ static int ftrace_check_record(struct dyn_ftrace *rec, int enable, int update)
if (enable && (rec->flags & ~FTRACE_FL_MASK))
flag = FTRACE_FL_ENABLED;
/*
* If enabling and the REGS flag does not match the REGS_EN, then
* do not ignore this record. Set flags to fail the compare against
* ENABLED.
*/
if (flag &&
(!(rec->flags & FTRACE_FL_REGS) != !(rec->flags & FTRACE_FL_REGS_EN)))
flag |= FTRACE_FL_REGS;
/* If the state of this record hasn't changed, then do nothing */
if ((rec->flags & FTRACE_FL_ENABLED) == flag)
return FTRACE_UPDATE_IGNORE;
if (flag) {
if (update)
/* Save off if rec is being enabled (for return value) */
flag ^= rec->flags & FTRACE_FL_ENABLED;
if (update) {
rec->flags |= FTRACE_FL_ENABLED;
return FTRACE_UPDATE_MAKE_CALL;
if (flag & FTRACE_FL_REGS) {
if (rec->flags & FTRACE_FL_REGS)
rec->flags |= FTRACE_FL_REGS_EN;
else
rec->flags &= ~FTRACE_FL_REGS_EN;
}
}
/*
* If this record is being updated from a nop, then
* return UPDATE_MAKE_CALL.
* Otherwise, if the EN flag is set, then return
* UPDATE_MODIFY_CALL_REGS to tell the caller to convert
* from the non-save regs, to a save regs function.
* Otherwise,
* return UPDATE_MODIFY_CALL to tell the caller to convert
* from the save regs, to a non-save regs function.
*/
if (flag & FTRACE_FL_ENABLED)
return FTRACE_UPDATE_MAKE_CALL;
else if (rec->flags & FTRACE_FL_REGS_EN)
return FTRACE_UPDATE_MODIFY_CALL_REGS;
else
return FTRACE_UPDATE_MODIFY_CALL;
}
if (update)
rec->flags &= ~FTRACE_FL_ENABLED;
if (update) {
/* If there's no more users, clear all flags */
if (!(rec->flags & ~FTRACE_FL_MASK))
rec->flags = 0;
else
/* Just disable the record (keep REGS state) */
rec->flags &= ~FTRACE_FL_ENABLED;
}
return FTRACE_UPDATE_MAKE_NOP;
}
......@@ -1662,13 +1738,17 @@ int ftrace_test_record(struct dyn_ftrace *rec, int enable)
static int
__ftrace_replace_code(struct dyn_ftrace *rec, int enable)
{
unsigned long ftrace_old_addr;
unsigned long ftrace_addr;
int ret;
ftrace_addr = (unsigned long)FTRACE_ADDR;
ret = ftrace_update_record(rec, enable);
if (rec->flags & FTRACE_FL_REGS)
ftrace_addr = (unsigned long)FTRACE_REGS_ADDR;
else
ftrace_addr = (unsigned long)FTRACE_ADDR;
switch (ret) {
case FTRACE_UPDATE_IGNORE:
return 0;
......@@ -1678,6 +1758,15 @@ __ftrace_replace_code(struct dyn_ftrace *rec, int enable)
case FTRACE_UPDATE_MAKE_NOP:
return ftrace_make_nop(NULL, rec, ftrace_addr);
case FTRACE_UPDATE_MODIFY_CALL_REGS:
case FTRACE_UPDATE_MODIFY_CALL:
if (rec->flags & FTRACE_FL_REGS)
ftrace_old_addr = (unsigned long)FTRACE_ADDR;
else
ftrace_old_addr = (unsigned long)FTRACE_REGS_ADDR;
return ftrace_modify_call(rec, ftrace_old_addr, ftrace_addr);
}
return -1; /* unknow ftrace bug */
......@@ -1882,16 +1971,6 @@ static void ftrace_run_update_code(int command)
*/
arch_ftrace_update_code(command);
#ifndef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST
/*
* For archs that call ftrace_test_stop_func(), we must
* wait till after we update all the function callers
* before we update the callback. This keeps different
* ops that record different functions from corrupting
* each other.
*/
__ftrace_trace_function = __ftrace_trace_function_delay;
#endif
function_trace_stop--;
ret = ftrace_arch_code_modify_post_process();
......@@ -2441,8 +2520,9 @@ static int t_show(struct seq_file *m, void *v)
seq_printf(m, "%ps", (void *)rec->ip);
if (iter->flags & FTRACE_ITER_ENABLED)
seq_printf(m, " (%ld)",
rec->flags & ~FTRACE_FL_MASK);
seq_printf(m, " (%ld)%s",
rec->flags & ~FTRACE_FL_MASK,
rec->flags & FTRACE_FL_REGS ? " R" : "");
seq_printf(m, "\n");
return 0;
......@@ -2790,8 +2870,8 @@ static int __init ftrace_mod_cmd_init(void)
}
device_initcall(ftrace_mod_cmd_init);
static void
function_trace_probe_call(unsigned long ip, unsigned long parent_ip)
static void function_trace_probe_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct ftrace_func_probe *entry;
struct hlist_head *hhd;
......@@ -3162,8 +3242,27 @@ ftrace_notrace_write(struct file *file, const char __user *ubuf,
}
static int
ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len,
int reset, int enable)
ftrace_match_addr(struct ftrace_hash *hash, unsigned long ip, int remove)
{
struct ftrace_func_entry *entry;
if (!ftrace_location(ip))
return -EINVAL;
if (remove) {
entry = ftrace_lookup_ip(hash, ip);
if (!entry)
return -ENOENT;
free_hash_entry(hash, entry);
return 0;
}
return add_hash_entry(hash, ip);
}
static int
ftrace_set_hash(struct ftrace_ops *ops, unsigned char *buf, int len,
unsigned long ip, int remove, int reset, int enable)
{
struct ftrace_hash **orig_hash;
struct ftrace_hash *hash;
......@@ -3192,6 +3291,11 @@ ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len,
ret = -EINVAL;
goto out_regex_unlock;
}
if (ip) {
ret = ftrace_match_addr(hash, ip, remove);
if (ret < 0)
goto out_regex_unlock;
}
mutex_lock(&ftrace_lock);
ret = ftrace_hash_move(ops, enable, orig_hash, hash);
......@@ -3208,6 +3312,37 @@ ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len,
return ret;
}
static int
ftrace_set_addr(struct ftrace_ops *ops, unsigned long ip, int remove,
int reset, int enable)
{
return ftrace_set_hash(ops, 0, 0, ip, remove, reset, enable);
}
/**
* ftrace_set_filter_ip - set a function to filter on in ftrace by address
* @ops - the ops to set the filter with
* @ip - the address to add to or remove from the filter.
* @remove - non zero to remove the ip from the filter
* @reset - non zero to reset all filters before applying this filter.
*
* Filters denote which functions should be enabled when tracing is enabled
* If @ip is NULL, it failes to update filter.
*/
int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip,
int remove, int reset)
{
return ftrace_set_addr(ops, ip, remove, reset, 1);
}
EXPORT_SYMBOL_GPL(ftrace_set_filter_ip);
static int
ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len,
int reset, int enable)
{
return ftrace_set_hash(ops, buf, len, 0, 0, reset, enable);
}
/**
* ftrace_set_filter - set a function to filter on in ftrace
* @ops - the ops to set the filter with
......@@ -3912,6 +4047,7 @@ void __init ftrace_init(void)
static struct ftrace_ops global_ops = {
.func = ftrace_stub,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static int __init ftrace_nodyn_init(void)
......@@ -3942,10 +4078,9 @@ ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip)
#endif /* CONFIG_DYNAMIC_FTRACE */
static void
ftrace_ops_control_func(unsigned long ip, unsigned long parent_ip)
ftrace_ops_control_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs)
{
struct ftrace_ops *op;
if (unlikely(trace_recursion_test(TRACE_CONTROL_BIT)))
return;
......@@ -3959,7 +4094,7 @@ ftrace_ops_control_func(unsigned long ip, unsigned long parent_ip)
while (op != &ftrace_list_end) {
if (!ftrace_function_local_disabled(op) &&
ftrace_ops_test(op, ip))
op->func(ip, parent_ip);
op->func(ip, parent_ip, op, regs);
op = rcu_dereference_raw(op->next);
};
......@@ -3969,13 +4104,18 @@ ftrace_ops_control_func(unsigned long ip, unsigned long parent_ip)
static struct ftrace_ops control_ops = {
.func = ftrace_ops_control_func,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static void
ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
static inline void
__ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *ignored, struct pt_regs *regs)
{
struct ftrace_ops *op;
if (function_trace_stop)
return;
if (unlikely(trace_recursion_test(TRACE_INTERNAL_BIT)))
return;
......@@ -3988,13 +4128,39 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
op = rcu_dereference_raw(ftrace_ops_list);
while (op != &ftrace_list_end) {
if (ftrace_ops_test(op, ip))
op->func(ip, parent_ip);
op->func(ip, parent_ip, op, regs);
op = rcu_dereference_raw(op->next);
};
preempt_enable_notrace();
trace_recursion_clear(TRACE_INTERNAL_BIT);
}
/*
* Some archs only support passing ip and parent_ip. Even though
* the list function ignores the op parameter, we do not want any
* C side effects, where a function is called without the caller
* sending a third parameter.
* Archs are to support both the regs and ftrace_ops at the same time.
* If they support ftrace_ops, it is assumed they support regs.
* If call backs want to use regs, they must either check for regs
* being NULL, or ARCH_SUPPORTS_FTRACE_SAVE_REGS.
* Note, ARCH_SUPPORT_SAVE_REGS expects a full regs to be saved.
* An architecture can pass partial regs with ftrace_ops and still
* set the ARCH_SUPPORT_FTARCE_OPS.
*/
#if ARCH_SUPPORTS_FTRACE_OPS
static void ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *regs)
{
__ftrace_ops_list_func(ip, parent_ip, NULL, regs);
}
#else
static void ftrace_ops_no_ops(unsigned long ip, unsigned long parent_ip)
{
__ftrace_ops_list_func(ip, parent_ip, NULL, NULL);
}
#endif
static void clear_ftrace_swapper(void)
{
struct task_struct *p;
......
kernel/trace/ring_buffer.c
浏览文件 @ 7e92daae
......@@ -2816,7 +2816,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_record_enable);
* to the buffer after this will fail and return NULL.
*
* This is different than ring_buffer_record_disable() as
* it works like an on/off switch, where as the disable() verison
* it works like an on/off switch, where as the disable() version
* must be paired with a enable().
*/
void ring_buffer_record_off(struct ring_buffer *buffer)
......@@ -2839,7 +2839,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_record_off);
* ring_buffer_record_off().
*
* This is different than ring_buffer_record_enable() as
* it works like an on/off switch, where as the enable() verison
* it works like an on/off switch, where as the enable() version
* must be paired with a disable().
*/
void ring_buffer_record_on(struct ring_buffer *buffer)
......
kernel/trace/trace.c
浏览文件 @ 7e92daae
......@@ -328,7 +328,7 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME |
TRACE_ITER_GRAPH_TIME | TRACE_ITER_RECORD_CMD | TRACE_ITER_OVERWRITE |
TRACE_ITER_IRQ_INFO;
TRACE_ITER_IRQ_INFO | TRACE_ITER_MARKERS;
static int trace_stop_count;
static DEFINE_RAW_SPINLOCK(tracing_start_lock);
......@@ -426,15 +426,15 @@ __setup("trace_buf_size=", set_buf_size);
static int __init set_tracing_thresh(char *str)
{
unsigned long threshhold;
unsigned long threshold;
int ret;
if (!str)
return 0;
ret = strict_strtoul(str, 0, &threshhold);
ret = strict_strtoul(str, 0, &threshold);
if (ret < 0)
return 0;
tracing_thresh = threshhold * 1000;
tracing_thresh = threshold * 1000;
return 1;
}
__setup("tracing_thresh=", set_tracing_thresh);
......@@ -470,6 +470,7 @@ static const char *trace_options[] = {
"overwrite",
"disable_on_free",
"irq-info",
"markers",
NULL
};
......@@ -3886,6 +3887,9 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
if (tracing_disabled)
return -EINVAL;
if (!(trace_flags & TRACE_ITER_MARKERS))
return -EINVAL;
if (cnt > TRACE_BUF_SIZE)
cnt = TRACE_BUF_SIZE;
......
kernel/trace/trace.h
浏览文件 @ 7e92daae
......@@ -472,11 +472,11 @@ extern void trace_find_cmdline(int pid, char comm[]);
#ifdef CONFIG_DYNAMIC_FTRACE
extern unsigned long ftrace_update_tot_cnt;
#endif
#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
extern int DYN_FTRACE_TEST_NAME(void);
#define DYN_FTRACE_TEST_NAME2 trace_selftest_dynamic_test_func2
extern int DYN_FTRACE_TEST_NAME2(void);
#endif
extern int ring_buffer_expanded;
extern bool tracing_selftest_disabled;
......@@ -680,6 +680,7 @@ enum trace_iterator_flags {
TRACE_ITER_OVERWRITE = 0x200000,
TRACE_ITER_STOP_ON_FREE = 0x400000,
TRACE_ITER_IRQ_INFO = 0x800000,
TRACE_ITER_MARKERS = 0x1000000,
};
/*
......
kernel/trace/trace_event_perf.c
浏览文件 @ 7e92daae
......@@ -258,7 +258,8 @@ EXPORT_SYMBOL_GPL(perf_trace_buf_prepare);
#ifdef CONFIG_FUNCTION_TRACER
static void
perf_ftrace_function_call(unsigned long ip, unsigned long parent_ip)
perf_ftrace_function_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *ops, struct pt_regs *pt_regs)
{
struct ftrace_entry *entry;
struct hlist_head *head;
......
kernel/trace/trace_events.c
浏览文件 @ 7e92daae
......@@ -1199,6 +1199,31 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
return 0;
}
static void event_remove(struct ftrace_event_call *call)
{
ftrace_event_enable_disable(call, 0);
if (call->event.funcs)
__unregister_ftrace_event(&call->event);
list_del(&call->list);
}
static int event_init(struct ftrace_event_call *call)
{
int ret = 0;
if (WARN_ON(!call->name))
return -EINVAL;
if (call->class->raw_init) {
ret = call->class->raw_init(call);
if (ret < 0 && ret != -ENOSYS)
pr_warn("Could not initialize trace events/%s\n",
call->name);
}
return ret;
}
static int
__trace_add_event_call(struct ftrace_event_call *call, struct module *mod,
const struct file_operations *id,
......@@ -1209,19 +1234,9 @@ __trace_add_event_call(struct ftrace_event_call *call, struct module *mod,
struct dentry *d_events;
int ret;
/* The linker may leave blanks */
if (!call->name)
return -EINVAL;
if (call->class->raw_init) {
ret = call->class->raw_init(call);
if (ret < 0) {
if (ret != -ENOSYS)
pr_warning("Could not initialize trace events/%s\n",
call->name);
return ret;
}
}
ret = event_init(call);
if (ret < 0)
return ret;
d_events = event_trace_events_dir();
if (!d_events)
......@@ -1272,13 +1287,10 @@ static void remove_subsystem_dir(const char *name)
*/
static void __trace_remove_event_call(struct ftrace_event_call *call)
{
ftrace_event_enable_disable(call, 0);
if (call->event.funcs)
__unregister_ftrace_event(&call->event);
debugfs_remove_recursive(call->dir);
list_del(&call->list);
event_remove(call);
trace_destroy_fields(call);
destroy_preds(call);
debugfs_remove_recursive(call->dir);
remove_subsystem_dir(call->class->system);
}
......@@ -1450,15 +1462,43 @@ static __init int setup_trace_event(char *str)
}
__setup("trace_event=", setup_trace_event);
static __init int event_trace_enable(void)
{
struct ftrace_event_call **iter, *call;
char *buf = bootup_event_buf;
char *token;
int ret;
for_each_event(iter, __start_ftrace_events, __stop_ftrace_events) {
call = *iter;
ret = event_init(call);
if (!ret)
list_add(&call->list, &ftrace_events);
}
while (true) {
token = strsep(&buf, ",");
if (!token)
break;
if (!*token)
continue;
ret = ftrace_set_clr_event(token, 1);
if (ret)
pr_warn("Failed to enable trace event: %s\n", token);
}
return 0;
}
static __init int event_trace_init(void)
{
struct ftrace_event_call **call;
struct ftrace_event_call *call;
struct dentry *d_tracer;
struct dentry *entry;
struct dentry *d_events;
int ret;
char *buf = bootup_event_buf;
char *token;
d_tracer = tracing_init_dentry();
if (!d_tracer)
......@@ -1497,24 +1537,19 @@ static __init int event_trace_init(void)
if (trace_define_common_fields())
pr_warning("tracing: Failed to allocate common fields");
for_each_event(call, __start_ftrace_events, __stop_ftrace_events) {
__trace_add_event_call(*call, NULL, &ftrace_event_id_fops,
/*
* Early initialization already enabled ftrace event.
* Now it's only necessary to create the event directory.
*/
list_for_each_entry(call, &ftrace_events, list) {
ret = event_create_dir(call, d_events,
&ftrace_event_id_fops,
&ftrace_enable_fops,
&ftrace_event_filter_fops,
&ftrace_event_format_fops);
}
while (true) {
token = strsep(&buf, ",");
if (!token)
break;
if (!*token)
continue;
ret = ftrace_set_clr_event(token, 1);
if (ret)
pr_warning("Failed to enable trace event: %s\n", token);
if (ret < 0)
event_remove(call);
}
ret = register_module_notifier(&trace_module_nb);
......@@ -1523,6 +1558,7 @@ static __init int event_trace_init(void)
return 0;
}
core_initcall(event_trace_enable);
fs_initcall(event_trace_init);
#ifdef CONFIG_FTRACE_STARTUP_TEST
......@@ -1646,9 +1682,11 @@ static __init void event_trace_self_tests(void)
event_test_stuff();
ret = __ftrace_set_clr_event(NULL, system->name, NULL, 0);
if (WARN_ON_ONCE(ret))
if (WARN_ON_ONCE(ret)) {
pr_warning("error disabling system %s\n",
system->name);
continue;
}
pr_cont("OK\n");
}
......@@ -1681,7 +1719,8 @@ static __init void event_trace_self_tests(void)
static DEFINE_PER_CPU(atomic_t, ftrace_test_event_disable);
static void
function_test_events_call(unsigned long ip, unsigned long parent_ip)
function_test_events_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct ring_buffer_event *event;
struct ring_buffer *buffer;
......@@ -1720,6 +1759,7 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip)
static struct ftrace_ops trace_ops __initdata =
{
.func = function_test_events_call,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static __init void event_trace_self_test_with_function(void)
......
kernel/trace/trace_events_filter.c
浏览文件 @ 7e92daae
......@@ -2002,7 +2002,7 @@ static int ftrace_function_set_regexp(struct ftrace_ops *ops, int filter,
static int __ftrace_function_set_filter(int filter, char *buf, int len,
struct function_filter_data *data)
{
int i, re_cnt, ret;
int i, re_cnt, ret = -EINVAL;
int *reset;
char **re;
......
kernel/trace/trace_functions.c
浏览文件 @ 7e92daae
......@@ -49,7 +49,8 @@ static void function_trace_start(struct trace_array *tr)
}
static void
function_trace_call_preempt_only(unsigned long ip, unsigned long parent_ip)
function_trace_call_preempt_only(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct trace_array *tr = func_trace;
struct trace_array_cpu *data;
......@@ -84,7 +85,9 @@ enum {
static struct tracer_flags func_flags;
static void
function_trace_call(unsigned long ip, unsigned long parent_ip)
function_trace_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct trace_array *tr = func_trace;
struct trace_array_cpu *data;
......@@ -121,7 +124,8 @@ function_trace_call(unsigned long ip, unsigned long parent_ip)
}
static void
function_stack_trace_call(unsigned long ip, unsigned long parent_ip)
function_stack_trace_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct trace_array *tr = func_trace;
struct trace_array_cpu *data;
......@@ -164,13 +168,13 @@ function_stack_trace_call(unsigned long ip, unsigned long parent_ip)
static struct ftrace_ops trace_ops __read_mostly =
{
.func = function_trace_call,
.flags = FTRACE_OPS_FL_GLOBAL,
.flags = FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_RECURSION_SAFE,
};
static struct ftrace_ops trace_stack_ops __read_mostly =
{
.func = function_stack_trace_call,
.flags = FTRACE_OPS_FL_GLOBAL,
.flags = FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_RECURSION_SAFE,
};
static struct tracer_opt func_opts[] = {
......
kernel/trace/trace_functions_graph.c
浏览文件 @ 7e92daae
......@@ -143,7 +143,7 @@ ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret,
return;
}
#ifdef CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST
#if defined(CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST) && !defined(CC_USING_FENTRY)
/*
* The arch may choose to record the frame pointer used
* and check it here to make sure that it is what we expect it
......@@ -154,6 +154,9 @@ ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret,
*
* Currently, x86_32 with optimize for size (-Os) makes the latest
* gcc do the above.
*
* Note, -mfentry does not use frame pointers, and this test
* is not needed if CC_USING_FENTRY is set.
*/
if (unlikely(current->ret_stack[index].fp != frame_pointer)) {
ftrace_graph_stop();
......
kernel/trace/trace_irqsoff.c
浏览文件 @ 7e92daae
......@@ -136,7 +136,8 @@ static int func_prolog_dec(struct trace_array *tr,
* irqsoff uses its own tracer function to keep the overhead down:
*/
static void
irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)
irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct trace_array *tr = irqsoff_trace;
struct trace_array_cpu *data;
......@@ -153,7 +154,7 @@ irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)
static struct ftrace_ops trace_ops __read_mostly =
{
.func = irqsoff_tracer_call,
.flags = FTRACE_OPS_FL_GLOBAL,
.flags = FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_RECURSION_SAFE,
};
#endif /* CONFIG_FUNCTION_TRACER */
......
kernel/trace/trace_sched_wakeup.c
浏览文件 @ 7e92daae
......@@ -108,7 +108,8 @@ func_prolog_preempt_disable(struct trace_array *tr,
* wakeup uses its own tracer function to keep the overhead down:
*/
static void
wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
wakeup_tracer_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
struct trace_array *tr = wakeup_trace;
struct trace_array_cpu *data;
......@@ -129,7 +130,7 @@ wakeup_tracer_call(unsigned long ip, unsigned long parent_ip)
static struct ftrace_ops trace_ops __read_mostly =
{
.func = wakeup_tracer_call,
.flags = FTRACE_OPS_FL_GLOBAL,
.flags = FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_RECURSION_SAFE,
};
#endif /* CONFIG_FUNCTION_TRACER */
......
kernel/trace/trace_selftest.c
浏览文件 @ 7e92daae
......@@ -103,54 +103,67 @@ static inline void warn_failed_init_tracer(struct tracer *trace, int init_ret)
static int trace_selftest_test_probe1_cnt;
static void trace_selftest_test_probe1_func(unsigned long ip,
unsigned long pip)
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
trace_selftest_test_probe1_cnt++;
}
static int trace_selftest_test_probe2_cnt;
static void trace_selftest_test_probe2_func(unsigned long ip,
unsigned long pip)
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
trace_selftest_test_probe2_cnt++;
}
static int trace_selftest_test_probe3_cnt;
static void trace_selftest_test_probe3_func(unsigned long ip,
unsigned long pip)
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
trace_selftest_test_probe3_cnt++;
}
static int trace_selftest_test_global_cnt;
static void trace_selftest_test_global_func(unsigned long ip,
unsigned long pip)
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
trace_selftest_test_global_cnt++;
}
static int trace_selftest_test_dyn_cnt;
static void trace_selftest_test_dyn_func(unsigned long ip,
unsigned long pip)
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
trace_selftest_test_dyn_cnt++;
}
static struct ftrace_ops test_probe1 = {
.func = trace_selftest_test_probe1_func,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static struct ftrace_ops test_probe2 = {
.func = trace_selftest_test_probe2_func,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static struct ftrace_ops test_probe3 = {
.func = trace_selftest_test_probe3_func,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static struct ftrace_ops test_global = {
.func = trace_selftest_test_global_func,
.flags = FTRACE_OPS_FL_GLOBAL,
.func = trace_selftest_test_global_func,
.flags = FTRACE_OPS_FL_GLOBAL | FTRACE_OPS_FL_RECURSION_SAFE,
};
static void print_counts(void)
......@@ -393,10 +406,253 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
return ret;
}
static int trace_selftest_recursion_cnt;
static void trace_selftest_test_recursion_func(unsigned long ip,
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
/*
* This function is registered without the recursion safe flag.
* The ftrace infrastructure should provide the recursion
* protection. If not, this will crash the kernel!
*/
trace_selftest_recursion_cnt++;
DYN_FTRACE_TEST_NAME();
}
static void trace_selftest_test_recursion_safe_func(unsigned long ip,
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
/*
* We said we would provide our own recursion. By calling
* this function again, we should recurse back into this function
* and count again. But this only happens if the arch supports
* all of ftrace features and nothing else is using the function
* tracing utility.
*/
if (trace_selftest_recursion_cnt++)
return;
DYN_FTRACE_TEST_NAME();
}
static struct ftrace_ops test_rec_probe = {
.func = trace_selftest_test_recursion_func,
};
static struct ftrace_ops test_recsafe_probe = {
.func = trace_selftest_test_recursion_safe_func,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static int
trace_selftest_function_recursion(void)
{
int save_ftrace_enabled = ftrace_enabled;
int save_tracer_enabled = tracer_enabled;
char *func_name;
int len;
int ret;
int cnt;
/* The previous test PASSED */
pr_cont("PASSED\n");
pr_info("Testing ftrace recursion: ");
/* enable tracing, and record the filter function */
ftrace_enabled = 1;
tracer_enabled = 1;
/* Handle PPC64 '.' name */
func_name = "*" __stringify(DYN_FTRACE_TEST_NAME);
len = strlen(func_name);
ret = ftrace_set_filter(&test_rec_probe, func_name, len, 1);
if (ret) {
pr_cont("*Could not set filter* ");
goto out;
}
ret = register_ftrace_function(&test_rec_probe);
if (ret) {
pr_cont("*could not register callback* ");
goto out;
}
DYN_FTRACE_TEST_NAME();
unregister_ftrace_function(&test_rec_probe);
ret = -1;
if (trace_selftest_recursion_cnt != 1) {
pr_cont("*callback not called once (%d)* ",
trace_selftest_recursion_cnt);
goto out;
}
trace_selftest_recursion_cnt = 1;
pr_cont("PASSED\n");
pr_info("Testing ftrace recursion safe: ");
ret = ftrace_set_filter(&test_recsafe_probe, func_name, len, 1);
if (ret) {
pr_cont("*Could not set filter* ");
goto out;
}
ret = register_ftrace_function(&test_recsafe_probe);
if (ret) {
pr_cont("*could not register callback* ");
goto out;
}
DYN_FTRACE_TEST_NAME();
unregister_ftrace_function(&test_recsafe_probe);
/*
* If arch supports all ftrace features, and no other task
* was on the list, we should be fine.
*/
if (!ftrace_nr_registered_ops() && !FTRACE_FORCE_LIST_FUNC)
cnt = 2; /* Should have recursed */
else
cnt = 1;
ret = -1;
if (trace_selftest_recursion_cnt != cnt) {
pr_cont("*callback not called expected %d times (%d)* ",
cnt, trace_selftest_recursion_cnt);
goto out;
}
ret = 0;
out:
ftrace_enabled = save_ftrace_enabled;
tracer_enabled = save_tracer_enabled;
return ret;
}
#else
# define trace_selftest_startup_dynamic_tracing(trace, tr, func) ({ 0; })
# define trace_selftest_function_recursion() ({ 0; })
#endif /* CONFIG_DYNAMIC_FTRACE */
static enum {
TRACE_SELFTEST_REGS_START,
TRACE_SELFTEST_REGS_FOUND,
TRACE_SELFTEST_REGS_NOT_FOUND,
} trace_selftest_regs_stat;
static void trace_selftest_test_regs_func(unsigned long ip,
unsigned long pip,
struct ftrace_ops *op,
struct pt_regs *pt_regs)
{
if (pt_regs)
trace_selftest_regs_stat = TRACE_SELFTEST_REGS_FOUND;
else
trace_selftest_regs_stat = TRACE_SELFTEST_REGS_NOT_FOUND;
}
static struct ftrace_ops test_regs_probe = {
.func = trace_selftest_test_regs_func,
.flags = FTRACE_OPS_FL_RECURSION_SAFE | FTRACE_OPS_FL_SAVE_REGS,
};
static int
trace_selftest_function_regs(void)
{
int save_ftrace_enabled = ftrace_enabled;
int save_tracer_enabled = tracer_enabled;
char *func_name;
int len;
int ret;
int supported = 0;
#ifdef ARCH_SUPPORTS_FTRACE_SAVE_REGS
supported = 1;
#endif
/* The previous test PASSED */
pr_cont("PASSED\n");
pr_info("Testing ftrace regs%s: ",
!supported ? "(no arch support)" : "");
/* enable tracing, and record the filter function */
ftrace_enabled = 1;
tracer_enabled = 1;
/* Handle PPC64 '.' name */
func_name = "*" __stringify(DYN_FTRACE_TEST_NAME);
len = strlen(func_name);
ret = ftrace_set_filter(&test_regs_probe, func_name, len, 1);
/*
* If DYNAMIC_FTRACE is not set, then we just trace all functions.
* This test really doesn't care.
*/
if (ret && ret != -ENODEV) {
pr_cont("*Could not set filter* ");
goto out;
}
ret = register_ftrace_function(&test_regs_probe);
/*
* Now if the arch does not support passing regs, then this should
* have failed.
*/
if (!supported) {
if (!ret) {
pr_cont("*registered save-regs without arch support* ");
goto out;
}
test_regs_probe.flags |= FTRACE_OPS_FL_SAVE_REGS_IF_SUPPORTED;
ret = register_ftrace_function(&test_regs_probe);
}
if (ret) {
pr_cont("*could not register callback* ");
goto out;
}
DYN_FTRACE_TEST_NAME();
unregister_ftrace_function(&test_regs_probe);
ret = -1;
switch (trace_selftest_regs_stat) {
case TRACE_SELFTEST_REGS_START:
pr_cont("*callback never called* ");
goto out;
case TRACE_SELFTEST_REGS_FOUND:
if (supported)
break;
pr_cont("*callback received regs without arch support* ");
goto out;
case TRACE_SELFTEST_REGS_NOT_FOUND:
if (!supported)
break;
pr_cont("*callback received NULL regs* ");
goto out;
}
ret = 0;
out:
ftrace_enabled = save_ftrace_enabled;
tracer_enabled = save_tracer_enabled;
return ret;
}
/*
* Simple verification test of ftrace function tracer.
* Enable ftrace, sleep 1/10 second, and then read the trace
......@@ -442,7 +698,14 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
ret = trace_selftest_startup_dynamic_tracing(trace, tr,
DYN_FTRACE_TEST_NAME);
if (ret)
goto out;
ret = trace_selftest_function_recursion();
if (ret)
goto out;
ret = trace_selftest_function_regs();
out:
ftrace_enabled = save_ftrace_enabled;
tracer_enabled = save_tracer_enabled;
......@@ -778,6 +1041,8 @@ static int trace_wakeup_test_thread(void *data)
set_current_state(TASK_INTERRUPTIBLE);
schedule();
complete(x);
/* we are awake, now wait to disappear */
while (!kthread_should_stop()) {
/*
......@@ -821,24 +1086,21 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
/* reset the max latency */
tracing_max_latency = 0;
/* sleep to let the RT thread sleep too */
msleep(100);
while (p->on_rq) {
/*
* Sleep to make sure the RT thread is asleep too.
* On virtual machines we can't rely on timings,
* but we want to make sure this test still works.
*/
msleep(100);
}
/*
* Yes this is slightly racy. It is possible that for some
* strange reason that the RT thread we created, did not
* call schedule for 100ms after doing the completion,
* and we do a wakeup on a task that already is awake.
* But that is extremely unlikely, and the worst thing that
* happens in such a case, is that we disable tracing.
* Honestly, if this race does happen something is horrible
* wrong with the system.
*/
init_completion(&isrt);
wake_up_process(p);
/* give a little time to let the thread wake up */
msleep(100);
/* Wait for the task to wake up */
wait_for_completion(&isrt);
/* stop the tracing. */
tracing_stop();
......
kernel/trace/trace_stack.c
浏览文件 @ 7e92daae
......@@ -111,7 +111,8 @@ static inline void check_stack(void)
}
static void
stack_trace_call(unsigned long ip, unsigned long parent_ip)
stack_trace_call(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct pt_regs *pt_regs)
{
int cpu;
......@@ -136,6 +137,7 @@ stack_trace_call(unsigned long ip, unsigned long parent_ip)
static struct ftrace_ops trace_ops __read_mostly =
{
.func = stack_trace_call,
.flags = FTRACE_OPS_FL_RECURSION_SAFE,
};
static ssize_t
......
kernel/trace/trace_syscalls.c
浏览文件 @ 7e92daae
......@@ -487,7 +487,7 @@ int __init init_ftrace_syscalls(void)
return 0;
}
core_initcall(init_ftrace_syscalls);
early_initcall(init_ftrace_syscalls);
#ifdef CONFIG_PERF_EVENTS
......
scripts/recordmcount.h
浏览文件 @ 7e92daae
......@@ -261,11 +261,13 @@ static unsigned get_mcountsym(Elf_Sym const *const sym0,
&sym0[Elf_r_sym(relp)];
char const *symname = &str0[w(symp->st_name)];
char const *mcount = gpfx == '_' ? "_mcount" : "mcount";
char const *fentry = "__fentry__";
if (symname[0] == '.')
++symname; /* ppc64 hack */
if (strcmp(mcount, symname) == 0 ||
(altmcount && strcmp(altmcount, symname) == 0))
(altmcount && strcmp(altmcount, symname) == 0) ||
(strcmp(fentry, symname) == 0))
mcountsym = Elf_r_sym(relp);
return mcountsym;
......
tools/lib/traceevent/Makefile
浏览文件 @ 7e92daae
......@@ -129,7 +129,7 @@ CFLAGS ?= -g -Wall
# Append required CFLAGS
override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
override CFLAGS += $(udis86-flags)
override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
ifeq ($(VERBOSE),1)
Q =
......
tools/lib/traceevent/event-parse.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/lib/traceevent/event-parse.h
浏览文件 @ 7e92daae
......@@ -24,8 +24,8 @@
#include <stdarg.h>
#include <regex.h>
#ifndef __unused
#define __unused __attribute__ ((unused))
#ifndef __maybe_unused
#define __maybe_unused __attribute__((unused))
#endif
/* ----------------------- trace_seq ----------------------- */
......@@ -49,7 +49,7 @@ struct pevent_record {
int cpu;
int ref_count;
int locked; /* Do not free, even if ref_count is zero */
void *private;
void *priv;
#if DEBUG_RECORD
struct pevent_record *prev;
struct pevent_record *next;
......@@ -106,7 +106,7 @@ struct plugin_option {
char *plugin_alias;
char *description;
char *value;
void *private;
void *priv;
int set;
};
......@@ -345,6 +345,35 @@ enum pevent_flag {
PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */
};
#define PEVENT_ERRORS \
_PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
_PE(PARSE_EVENT_FAILED, "failed to parse event"), \
_PE(READ_ID_FAILED, "failed to read event id"), \
_PE(READ_FORMAT_FAILED, "failed to read event format"), \
_PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
_PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
_PE(INVALID_ARG_TYPE, "invalid argument type")
#undef _PE
#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
enum pevent_errno {
PEVENT_ERRNO__SUCCESS = 0,
/*
* Choose an arbitrary negative big number not to clash with standard
* errno since SUS requires the errno has distinct positive values.
* See 'Issue 6' in the link below.
*
* http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
*/
__PEVENT_ERRNO__START = -100000,
PEVENT_ERRORS,
__PEVENT_ERRNO__END,
};
#undef _PE
struct cmdline;
struct cmdline_list;
struct func_map;
......@@ -509,8 +538,11 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
int long_size);
int pevent_parse_event(struct pevent *pevent, const char *buf,
unsigned long size, const char *sys);
enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
unsigned long size, const char *sys);
enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf,
unsigned long size, const char *sys);
void pevent_free_format(struct event_format *event);
void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
const char *name, struct pevent_record *record,
......@@ -561,6 +593,8 @@ int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
void pevent_event_info(struct trace_seq *s, struct event_format *event,
struct pevent_record *record);
int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
char *buf, size_t buflen);
struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
struct format_field **pevent_event_common_fields(struct event_format *event);
......
tools/lib/traceevent/event-utils.h
浏览文件 @ 7e92daae
......@@ -39,6 +39,12 @@ void __vdie(const char *fmt, ...);
void __vwarning(const char *fmt, ...);
void __vpr_stat(const char *fmt, ...);
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
static inline char *strim(char *string)
{
char *ret;
......
tools/perf/.gitignore
浏览文件 @ 7e92daae
......@@ -21,3 +21,5 @@ config.mak
config.mak.autogen
*-bison.*
*-flex.*
*.pyc
*.pyo
tools/perf/Documentation/Makefile
浏览文件 @ 7e92daae
......@@ -195,10 +195,10 @@ install-pdf: pdf
#install-html: html
# '$(SHELL_PATH_SQ)' ./install-webdoc.sh $(DESTDIR)$(htmldir)
../PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
$(QUIET_SUBDIR0)../ $(QUIET_SUBDIR1) PERF-VERSION-FILE
$(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
$(QUIET_SUBDIR0)../ $(QUIET_SUBDIR1) $(OUTPUT)PERF-VERSION-FILE
-include ../PERF-VERSION-FILE
-include $(OUTPUT)PERF-VERSION-FILE
#
# Determine "include::" file references in asciidoc files.
......
tools/perf/Documentation/jit-interface.txt 0 → 100644
浏览文件 @ 7e92daae
perf supports a simple JIT interface to resolve symbols for dynamic code generated
by a JIT.
The JIT has to write a /tmp/perf-%d.map (%d = pid of process) file
This is a text file.
Each line has the following format, fields separated with spaces:
START SIZE symbolname
START and SIZE are hex numbers without 0x.
symbolname is the rest of the line, so it could contain special characters.
The ownership of the file has to match the process.
tools/perf/Documentation/perf-annotate.txt
浏览文件 @ 7e92daae
......@@ -85,6 +85,9 @@ OPTIONS
-M::
--disassembler-style=:: Set disassembler style for objdump.
--objdump=<path>::
Path to objdump binary.
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-report[1]
tools/perf/Documentation/perf-diff.txt
浏览文件 @ 7e92daae
......@@ -17,6 +17,9 @@ captured via perf record.
If no parameters are passed it will assume perf.data.old and perf.data.
The differential profile is displayed only for events matching both
specified perf.data files.
OPTIONS
-------
-M::
......
tools/perf/Documentation/perf-kvm.txt
浏览文件 @ 7e92daae
......@@ -12,7 +12,7 @@ SYNOPSIS
[--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>]]
{top|record|report|diff|buildid-list}
'perf kvm' [--host] [--guest] [--guestkallsyms=<path> --guestmodules=<path>
| --guestvmlinux=<path>] {top|record|report|diff|buildid-list}
| --guestvmlinux=<path>] {top|record|report|diff|buildid-list|stat}
DESCRIPTION
-----------
......@@ -38,6 +38,18 @@ There are a couple of variants of perf kvm:
so that other tools can be used to fetch packages with matching symbol tables
for use by perf report.
'perf kvm stat <command>' to run a command and gather performance counter
statistics.
Especially, perf 'kvm stat record/report' generates a statistical analysis
of KVM events. Currently, vmexit, mmio and ioport events are supported.
'perf kvm stat record <command>' records kvm events and the events between
start and end <command>.
And this command produces a file which contains tracing results of kvm
events.
'perf kvm stat report' reports statistical data which includes events
handled time, samples, and so on.
OPTIONS
-------
-i::
......@@ -68,7 +80,21 @@ OPTIONS
--guestvmlinux=<path>::
Guest os kernel vmlinux.
STAT REPORT OPTIONS
-------------------
--vcpu=<value>::
analyze events which occures on this vcpu. (default: all vcpus)
--events=<value>::
events to be analyzed. Possible values: vmexit, mmio, ioport.
(default: vmexit)
-k::
--key=<value>::
Sorting key. Possible values: sample (default, sort by samples
number), time (sort by average time).
SEE ALSO
--------
linkperf:perf-top[1], linkperf:perf-record[1], linkperf:perf-report[1],
linkperf:perf-diff[1], linkperf:perf-buildid-list[1]
linkperf:perf-diff[1], linkperf:perf-buildid-list[1],
linkperf:perf-stat[1]
tools/perf/Documentation/perf-report.txt
浏览文件 @ 7e92daae
......@@ -168,6 +168,9 @@ OPTIONS
branch stacks and it will automatically switch to the branch view mode,
unless --no-branch-stack is used.
--objdump=<path>::
Path to objdump binary.
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-annotate[1]
tools/perf/Documentation/perf-script-perl.txt
浏览文件 @ 7e92daae
......@@ -116,8 +116,8 @@ search path and 'use'ing a few support modules (see module
descriptions below):
----
use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/perf-script-Util/lib";
use lib "./perf-script-Util/lib";
use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
use lib "./Perf-Trace-Util/lib";
use Perf::Trace::Core;
use Perf::Trace::Context;
use Perf::Trace::Util;
......
tools/perf/Documentation/perf-trace.txt 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/MANIFEST
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/Makefile
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/arch/x86/Makefile
浏览文件 @ 7e92daae
......@@ -2,4 +2,7 @@ ifndef NO_DWARF
PERF_HAVE_DWARF_REGS := 1
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
endif
ifndef NO_LIBUNWIND
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
endif
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
tools/perf/arch/x86/include/perf_regs.h 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/arch/x86/util/unwind.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/bash_completion 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/bench/bench.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/bench/mem-memcpy.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/bench/mem-memset.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/bench/sched-messaging.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/bench/sched-pipe.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-annotate.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-bench.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-buildid-cache.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-buildid-list.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-diff.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-evlist.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-help.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-inject.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-kmem.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-kvm.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-list.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-lock.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-probe.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-record.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-report.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-sched.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-script.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-stat.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-test.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-timechart.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-top.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin-trace.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/builtin.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/command-list.txt
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/config/feature-tests.mak
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/perf-archive.sh
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/perf.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/perf.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/scripts/python/event_analyzing_sample.py 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/browser.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/browsers/annotate.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/browsers/hists.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/gtk/browser.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/gtk/gtk.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/gtk/helpline.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/gtk/setup.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/gtk/util.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/helpline.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/helpline.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/hist.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/setup.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/stdio/hist.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/tui/helpline.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/ui/tui/setup.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/alias.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/annotate.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/annotate.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/build-id.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/cache.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/callchain.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/cgroup.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/config.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/cpumap.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/cpumap.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/debug.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/debug.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/dso-test-data.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/dwarf-aux.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/event.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/event.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/evlist.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/evlist.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/evsel.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/evsel.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/generate-cmdlist.sh
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/header.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/header.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/help.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/hist.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/hist.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/include/linux/magic.h 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/intlist.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/map.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/map.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/parse-events-test.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/parse-events.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/parse-events.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/parse-events.l
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/parse-events.y
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/parse-options.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/perf_regs.h 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/pmu.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/pmu.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/pmu.y
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/probe-event.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/probe-finder.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/python.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/session.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/session.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/sort.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/sort.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/stat.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/stat.h 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/string.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/strlist.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/symbol-elf.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/symbol-minimal.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/symbol.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/symbol.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/target.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/thread.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/top.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/top.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/trace-event-parse.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/trace-event.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/unwind.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/unwind.h 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/util.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/util.h
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/vdso.c 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/vdso.h 0 → 100644
浏览文件 @ 7e92daae
此差异已折叠。
tools/perf/util/wrapper.c
浏览文件 @ 7e92daae
此差异已折叠。
tools/scripts/Makefile.include
浏览文件 @ 7e92daae
此差异已折叠。
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或