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提交 2e2ca155 编写于 作者: S Steven Rostedt 提交者： Ingo Molnar
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ftrace: new continue entry - separate out from trace_entry 

Some tracers will need to work with more than one entry. In order to do this
the trace_entry structure was split into two fields. One for the start of
all entries, and one to continue an existing entry.

The trace_entry structure now has a "field" entry that consists of the previous
content of the trace_entry, and a "cont" entry that is just a string buffer
the size of the "field" entry.

Thanks to Andrew Morton for suggesting this idea.
Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 fed1939c
隐藏空白更改
内联 并排
Showing with 160 addition and 136 deletion
kernel/trace/trace.c
浏览文件 @ 2e2ca155
......@@ -817,10 +817,11 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags)
pc = preempt_count();
entry->preempt_count = pc & 0xff;
entry->pid = (tsk) ? tsk->pid : 0;
entry->t = ftrace_now(raw_smp_processor_id());
entry->flags = (irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
entry->field.preempt_count = pc & 0xff;
entry->field.pid = (tsk) ? tsk->pid : 0;
entry->field.t = ftrace_now(raw_smp_processor_id());
entry->field.flags =
(irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
(need_resched() ? TRACE_FLAG_NEED_RESCHED : 0);
......@@ -835,11 +836,11 @@ trace_function(struct trace_array *tr, struct trace_array_cpu *data,
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
entry = tracing_get_trace_entry(tr, data);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_FN;
entry->fn.ip = ip;
entry->fn.parent_ip = parent_ip;
entry->type = TRACE_FN;
entry->field.fn.ip = ip;
entry->field.fn.parent_ip = parent_ip;
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
}
......@@ -862,10 +863,10 @@ void __trace_mmiotrace_rw(struct trace_array *tr, struct trace_array_cpu *data,
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
entry = tracing_get_trace_entry(tr, data);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
entry->type = TRACE_MMIO_RW;
entry->mmiorw = *rw;
entry->type = TRACE_MMIO_RW;
entry->field.mmiorw = *rw;
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
......@@ -882,10 +883,10 @@ void __trace_mmiotrace_map(struct trace_array *tr, struct trace_array_cpu *data,
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
entry = tracing_get_trace_entry(tr, data);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
entry->type = TRACE_MMIO_MAP;
entry->mmiomap = *map;
entry->type = TRACE_MMIO_MAP;
entry->field.mmiomap = *map;
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
......@@ -909,12 +910,12 @@ void __trace_stack(struct trace_array *tr,
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_STACK;
memset(&entry->stack, 0, sizeof(entry->stack));
memset(&entry->field.stack, 0, sizeof(entry->field.stack));
trace.nr_entries = 0;
trace.max_entries = FTRACE_STACK_ENTRIES;
trace.skip = skip;
trace.entries = entry->stack.caller;
trace.entries = entry->field.stack.caller;
save_stack_trace(&trace);
}
......@@ -930,12 +931,12 @@ __trace_special(void *__tr, void *__data,
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
entry = tracing_get_trace_entry(tr, data);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, 0);
entry->type = TRACE_SPECIAL;
entry->special.arg1 = arg1;
entry->special.arg2 = arg2;
entry->special.arg3 = arg3;
entry->type = TRACE_SPECIAL;
entry->field.special.arg1 = arg1;
entry->field.special.arg2 = arg2;
entry->field.special.arg3 = arg3;
__trace_stack(tr, data, irq_flags, 4);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
......@@ -955,15 +956,15 @@ tracing_sched_switch_trace(struct trace_array *tr,
raw_local_irq_save(irq_flags);
__raw_spin_lock(&data->lock);
entry = tracing_get_trace_entry(tr, data);
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_CTX;
entry->ctx.prev_pid = prev->pid;
entry->ctx.prev_prio = prev->prio;
entry->ctx.prev_state = prev->state;
entry->ctx.next_pid = next->pid;
entry->ctx.next_prio = next->prio;
entry->ctx.next_state = next->state;
entry->type = TRACE_CTX;
entry->field.ctx.prev_pid = prev->pid;
entry->field.ctx.prev_prio = prev->prio;
entry->field.ctx.prev_state = prev->state;
entry->field.ctx.next_pid = next->pid;
entry->field.ctx.next_prio = next->prio;
entry->field.ctx.next_state = next->state;
__trace_stack(tr, data, flags, 5);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
......@@ -984,12 +985,12 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
entry = tracing_get_trace_entry(tr, data);
tracing_generic_entry_update(entry, flags);
entry->type = TRACE_WAKE;
entry->ctx.prev_pid = curr->pid;
entry->ctx.prev_prio = curr->prio;
entry->ctx.prev_state = curr->state;
entry->ctx.next_pid = wakee->pid;
entry->ctx.next_prio = wakee->prio;
entry->ctx.next_state = wakee->state;
entry->field.ctx.prev_pid = curr->pid;
entry->field.ctx.prev_prio = curr->prio;
entry->field.ctx.prev_state = curr->state;
entry->field.ctx.next_pid = wakee->pid;
entry->field.ctx.next_prio = wakee->prio;
entry->field.ctx.next_state = wakee->state;
__trace_stack(tr, data, flags, 6);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
......@@ -1118,7 +1119,7 @@ find_next_entry(struct trace_iterator *iter, int *ent_cpu)
/*
* Pick the entry with the smallest timestamp:
*/
if (ent && (!next || ent->t < next->t)) {
if (ent && (!next || ent->field.t < next->field.t)) {
next = ent;
next_cpu = cpu;
}
......@@ -1422,19 +1423,20 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter)
static void
lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
{
struct trace_field *field = &entry->field;
int hardirq, softirq;
char *comm;
comm = trace_find_cmdline(entry->pid);
comm = trace_find_cmdline(field->pid);
trace_seq_printf(s, "%8.8s-%-5d ", comm, entry->pid);
trace_seq_printf(s, "%8.8s-%-5d ", comm, field->pid);
trace_seq_printf(s, "%d", cpu);
trace_seq_printf(s, "%c%c",
(entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
((entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
(field->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
((field->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
hardirq = field->flags & TRACE_FLAG_HARDIRQ;
softirq = field->flags & TRACE_FLAG_SOFTIRQ;
if (hardirq && softirq) {
trace_seq_putc(s, 'H');
} else {
......@@ -1448,8 +1450,8 @@ lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
}
}
if (entry->preempt_count)
trace_seq_printf(s, "%x", entry->preempt_count);
if (field->preempt_count)
trace_seq_printf(s, "%x", field->preempt_count);
else
trace_seq_puts(s, ".");
}
......@@ -1479,6 +1481,7 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
struct trace_entry *next_entry = find_next_entry(iter, NULL);
unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
struct trace_entry *entry = iter->ent;
struct trace_field *field = &entry->field;
unsigned long abs_usecs;
unsigned long rel_usecs;
char *comm;
......@@ -1488,17 +1491,17 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
if (!next_entry)
next_entry = entry;
rel_usecs = ns2usecs(next_entry->t - entry->t);
abs_usecs = ns2usecs(entry->t - iter->tr->time_start);
rel_usecs = ns2usecs(next_entry->field.t - entry->field.t);
abs_usecs = ns2usecs(entry->field.t - iter->tr->time_start);
if (verbose) {
comm = trace_find_cmdline(entry->pid);
comm = trace_find_cmdline(field->pid);
trace_seq_printf(s, "%16s %5d %d %d %08x %08x [%08lx]"
" %ld.%03ldms (+%ld.%03ldms): ",
comm,
entry->pid, cpu, entry->flags,
entry->preempt_count, trace_idx,
ns2usecs(entry->t),
field->pid, cpu, field->flags,
field->preempt_count, trace_idx,
ns2usecs(field->t),
abs_usecs/1000,
abs_usecs % 1000, rel_usecs/1000,
rel_usecs % 1000);
......@@ -1508,41 +1511,42 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
}
switch (entry->type) {
case TRACE_FN:
seq_print_ip_sym(s, entry->fn.ip, sym_flags);
seq_print_ip_sym(s, field->fn.ip, sym_flags);
trace_seq_puts(s, " (");
if (kretprobed(entry->fn.parent_ip))
if (kretprobed(field->fn.parent_ip))
trace_seq_puts(s, KRETPROBE_MSG);
else
seq_print_ip_sym(s, entry->fn.parent_ip, sym_flags);
seq_print_ip_sym(s, field->fn.parent_ip, sym_flags);
trace_seq_puts(s, ")\n");
break;
case TRACE_CTX:
case TRACE_WAKE:
T = entry->ctx.next_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.next_state] : 'X';
T = field->ctx.next_state < sizeof(state_to_char) ?
state_to_char[field->ctx.next_state] : 'X';
state = entry->ctx.prev_state ? __ffs(entry->ctx.prev_state) + 1 : 0;
state = field->ctx.prev_state ?
__ffs(field->ctx.prev_state) + 1 : 0;
S = state < sizeof(state_to_char) - 1 ? state_to_char[state] : 'X';
comm = trace_find_cmdline(entry->ctx.next_pid);
comm = trace_find_cmdline(field->ctx.next_pid);
trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c %s\n",
entry->ctx.prev_pid,
entry->ctx.prev_prio,
field->ctx.prev_pid,
field->ctx.prev_prio,
S, entry->type == TRACE_CTX ? "==>" : " +",
entry->ctx.next_pid,
entry->ctx.next_prio,
field->ctx.next_pid,
field->ctx.next_prio,
T, comm);
break;
case TRACE_SPECIAL:
trace_seq_printf(s, "# %ld %ld %ld\n",
entry->special.arg1,
entry->special.arg2,
entry->special.arg3);
field->special.arg1,
field->special.arg2,
field->special.arg3);
break;
case TRACE_STACK:
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
if (i)
trace_seq_puts(s, " <= ");
seq_print_ip_sym(s, entry->stack.caller[i], sym_flags);
seq_print_ip_sym(s, field->stack.caller[i], sym_flags);
}
trace_seq_puts(s, "\n");
break;
......@@ -1557,6 +1561,7 @@ static int print_trace_fmt(struct trace_iterator *iter)
struct trace_seq *s = &iter->seq;
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
struct trace_entry *entry;
struct trace_field *field;
unsigned long usec_rem;
unsigned long long t;
unsigned long secs;
......@@ -1566,14 +1571,15 @@ static int print_trace_fmt(struct trace_iterator *iter)
int i;
entry = iter->ent;
field = &entry->field;
comm = trace_find_cmdline(iter->ent->pid);
comm = trace_find_cmdline(iter->ent->field.pid);
t = ns2usecs(entry->t);
t = ns2usecs(field->t);
usec_rem = do_div(t, 1000000ULL);
secs = (unsigned long)t;
ret = trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid);
ret = trace_seq_printf(s, "%16s-%-5d ", comm, field->pid);
if (!ret)
return 0;
ret = trace_seq_printf(s, "[%02d] ", iter->cpu);
......@@ -1585,18 +1591,19 @@ static int print_trace_fmt(struct trace_iterator *iter)
switch (entry->type) {
case TRACE_FN:
ret = seq_print_ip_sym(s, entry->fn.ip, sym_flags);
ret = seq_print_ip_sym(s, field->fn.ip, sym_flags);
if (!ret)
return 0;
if ((sym_flags & TRACE_ITER_PRINT_PARENT) &&
entry->fn.parent_ip) {
field->fn.parent_ip) {
ret = trace_seq_printf(s, " <-");
if (!ret)
return 0;
if (kretprobed(entry->fn.parent_ip))
if (kretprobed(field->fn.parent_ip))
ret = trace_seq_puts(s, KRETPROBE_MSG);
else
ret = seq_print_ip_sym(s, entry->fn.parent_ip,
ret = seq_print_ip_sym(s,
field->fn.parent_ip,
sym_flags);
if (!ret)
return 0;
......@@ -1607,26 +1614,26 @@ static int print_trace_fmt(struct trace_iterator *iter)
break;
case TRACE_CTX:
case TRACE_WAKE:
S = entry->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.prev_state] : 'X';
T = entry->ctx.next_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.next_state] : 'X';
S = field->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[field->ctx.prev_state] : 'X';
T = field->ctx.next_state < sizeof(state_to_char) ?
state_to_char[field->ctx.next_state] : 'X';
ret = trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c\n",
entry->ctx.prev_pid,
entry->ctx.prev_prio,
field->ctx.prev_pid,
field->ctx.prev_prio,
S,
entry->type == TRACE_CTX ? "==>" : " +",
entry->ctx.next_pid,
entry->ctx.next_prio,
field->ctx.next_pid,
field->ctx.next_prio,
T);
if (!ret)
return 0;
break;
case TRACE_SPECIAL:
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
entry->special.arg1,
entry->special.arg2,
entry->special.arg3);
field->special.arg1,
field->special.arg2,
field->special.arg3);
if (!ret)
return 0;
break;
......@@ -1637,7 +1644,7 @@ static int print_trace_fmt(struct trace_iterator *iter)
if (!ret)
return 0;
}
ret = seq_print_ip_sym(s, entry->stack.caller[i],
ret = seq_print_ip_sym(s, field->stack.caller[i],
sym_flags);
if (!ret)
return 0;
......@@ -1654,37 +1661,40 @@ static int print_raw_fmt(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
struct trace_entry *entry;
struct trace_field *field;
int ret;
int S, T;
entry = iter->ent;
field = &entry->field;
ret = trace_seq_printf(s, "%d %d %llu ",
entry->pid, iter->cpu, entry->t);
field->pid, iter->cpu, field->t);
if (!ret)
return 0;
switch (entry->type) {
case TRACE_FN:
ret = trace_seq_printf(s, "%x %x\n",
entry->fn.ip, entry->fn.parent_ip);
field->fn.ip,
field->fn.parent_ip);
if (!ret)
return 0;
break;
case TRACE_CTX:
case TRACE_WAKE:
S = entry->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.prev_state] : 'X';
T = entry->ctx.next_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.next_state] : 'X';
S = field->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[field->ctx.prev_state] : 'X';
T = field->ctx.next_state < sizeof(state_to_char) ?
state_to_char[field->ctx.next_state] : 'X';
if (entry->type == TRACE_WAKE)
S = '+';
ret = trace_seq_printf(s, "%d %d %c %d %d %c\n",
entry->ctx.prev_pid,
entry->ctx.prev_prio,
field->ctx.prev_pid,
field->ctx.prev_prio,
S,
entry->ctx.next_pid,
entry->ctx.next_prio,
field->ctx.next_pid,
field->ctx.next_prio,
T);
if (!ret)
return 0;
......@@ -1692,9 +1702,9 @@ static int print_raw_fmt(struct trace_iterator *iter)
case TRACE_SPECIAL:
case TRACE_STACK:
ret = trace_seq_printf(s, "# %ld %ld %ld\n",
entry->special.arg1,
entry->special.arg2,
entry->special.arg3);
field->special.arg1,
field->special.arg2,
field->special.arg3);
if (!ret)
return 0;
break;
......@@ -1719,40 +1729,41 @@ static int print_hex_fmt(struct trace_iterator *iter)
struct trace_seq *s = &iter->seq;
unsigned char newline = '\n';
struct trace_entry *entry;
struct trace_field *field;
int S, T;
entry = iter->ent;
field = &entry->field;
SEQ_PUT_HEX_FIELD_RET(s, entry->pid);
SEQ_PUT_HEX_FIELD_RET(s, field->pid);
SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
SEQ_PUT_HEX_FIELD_RET(s, entry->t);
SEQ_PUT_HEX_FIELD_RET(s, field->t);
switch (entry->type) {
case TRACE_FN:
SEQ_PUT_HEX_FIELD_RET(s, entry->fn.ip);
SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);
SEQ_PUT_HEX_FIELD_RET(s, field->fn.ip);
SEQ_PUT_HEX_FIELD_RET(s, field->fn.parent_ip);
break;
case TRACE_CTX:
case TRACE_WAKE:
S = entry->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.prev_state] : 'X';
T = entry->ctx.next_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.next_state] : 'X';
S = field->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[field->ctx.prev_state] : 'X';
T = field->ctx.next_state < sizeof(state_to_char) ?
state_to_char[field->ctx.next_state] : 'X';
if (entry->type == TRACE_WAKE)
S = '+';
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_pid);
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_prio);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_pid);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_prio);
SEQ_PUT_HEX_FIELD_RET(s, S);
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_pid);
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_prio);
SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_pid);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_prio);
SEQ_PUT_HEX_FIELD_RET(s, T);
break;
case TRACE_SPECIAL:
case TRACE_STACK:
SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg1);
SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg2);
SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg3);
SEQ_PUT_HEX_FIELD_RET(s, field->special.arg1);
SEQ_PUT_HEX_FIELD_RET(s, field->special.arg2);
SEQ_PUT_HEX_FIELD_RET(s, field->special.arg3);
break;
}
SEQ_PUT_FIELD_RET(s, newline);
......@@ -1764,31 +1775,33 @@ static int print_bin_fmt(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
struct trace_entry *entry;
struct trace_field *field;
entry = iter->ent;
field = &entry->field;
SEQ_PUT_FIELD_RET(s, entry->pid);
SEQ_PUT_FIELD_RET(s, entry->cpu);
SEQ_PUT_FIELD_RET(s, entry->t);
SEQ_PUT_FIELD_RET(s, field->pid);
SEQ_PUT_FIELD_RET(s, field->cpu);
SEQ_PUT_FIELD_RET(s, field->t);
switch (entry->type) {
case TRACE_FN:
SEQ_PUT_FIELD_RET(s, entry->fn.ip);
SEQ_PUT_FIELD_RET(s, entry->fn.parent_ip);
SEQ_PUT_FIELD_RET(s, field->fn.ip);
SEQ_PUT_FIELD_RET(s, field->fn.parent_ip);
break;
case TRACE_CTX:
SEQ_PUT_FIELD_RET(s, entry->ctx.prev_pid);
SEQ_PUT_FIELD_RET(s, entry->ctx.prev_prio);
SEQ_PUT_FIELD_RET(s, entry->ctx.prev_state);
SEQ_PUT_FIELD_RET(s, entry->ctx.next_pid);
SEQ_PUT_FIELD_RET(s, entry->ctx.next_prio);
SEQ_PUT_FIELD_RET(s, entry->ctx.next_state);
SEQ_PUT_FIELD_RET(s, field->ctx.prev_pid);
SEQ_PUT_FIELD_RET(s, field->ctx.prev_prio);
SEQ_PUT_FIELD_RET(s, field->ctx.prev_state);
SEQ_PUT_FIELD_RET(s, field->ctx.next_pid);
SEQ_PUT_FIELD_RET(s, field->ctx.next_prio);
SEQ_PUT_FIELD_RET(s, field->ctx.next_state);
break;
case TRACE_SPECIAL:
case TRACE_STACK:
SEQ_PUT_FIELD_RET(s, entry->special.arg1);
SEQ_PUT_FIELD_RET(s, entry->special.arg2);
SEQ_PUT_FIELD_RET(s, entry->special.arg3);
SEQ_PUT_FIELD_RET(s, field->special.arg1);
SEQ_PUT_FIELD_RET(s, field->special.arg2);
SEQ_PUT_FIELD_RET(s, field->special.arg3);
break;
}
return 1;
......
kernel/trace/trace.h
浏览文件 @ 2e2ca155
......@@ -61,13 +61,12 @@ struct stack_entry {
};
/*
* The trace entry - the most basic unit of tracing. This is what
* The trace field - the most basic unit of tracing. This is what
* is printed in the end as a single line in the trace output, such as:
*
* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
*/
struct trace_entry {
char type;
struct trace_field {
char cpu;
char flags;
char preempt_count;
......@@ -83,6 +82,18 @@ struct trace_entry {
};
};
struct trace_field_cont {
char buf[sizeof(struct trace_field)];
};
struct trace_entry {
char type;
union {
struct trace_field field;
struct trace_field_cont cont;
};
};
#define TRACE_ENTRY_SIZE sizeof(struct trace_entry)
/*
......
kernel/trace/trace_mmiotrace.c
浏览文件 @ 2e2ca155
......@@ -174,14 +174,14 @@ static ssize_t mmio_read(struct trace_iterator *iter, struct file *filp,
static int mmio_print_rw(struct trace_iterator *iter)
{
struct trace_entry *entry = iter->ent;
struct mmiotrace_rw *rw = &entry->mmiorw;
struct mmiotrace_rw *rw = &entry->field.mmiorw;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(entry->t);
unsigned long long t = ns2usecs(entry->field.t);
unsigned long usec_rem = do_div(t, 1000000ULL);
unsigned secs = (unsigned long)t;
int ret = 1;
switch (entry->mmiorw.opcode) {
switch (entry->field.mmiorw.opcode) {
case MMIO_READ:
ret = trace_seq_printf(s,
"R %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
......@@ -216,14 +216,14 @@ static int mmio_print_rw(struct trace_iterator *iter)
static int mmio_print_map(struct trace_iterator *iter)
{
struct trace_entry *entry = iter->ent;
struct mmiotrace_map *m = &entry->mmiomap;
struct mmiotrace_map *m = &entry->field.mmiomap;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(entry->t);
unsigned long long t = ns2usecs(entry->field.t);
unsigned long usec_rem = do_div(t, 1000000ULL);
unsigned secs = (unsigned long)t;
int ret = 1;
switch (entry->mmiorw.opcode) {
switch (entry->field.mmiorw.opcode) {
case MMIO_PROBE:
ret = trace_seq_printf(s,
"MAP %lu.%06lu %d 0x%llx 0x%lx 0x%lx 0x%lx %d\n",
......
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