Reviewed-by: bobv, dbuck

Reviewed-by: dsamersoff, sspitsyn, sla

Reviewed-by: dsamersoff, dcubed

Reviewed-by: kvn, twisti, stuefe

Reviewed-by: kvn, twisti, stuefe

Summary: Fixed by removing all code related to LowMemoryProtection, which removed offending code.
Reviewed-by: dholmes, minqi

Reviewed-by: dholmes
Contributed-by: cheleswer.sahu@oracle.com

6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
Summary: check_signal_handler will print out Warning for SHURDOWN2_SIGNAL (SIGINT) is replaced by non-interactive shell. Fix by supply more information of the replacement to user.
Reviewed-by: dholmes
Contributed-by: yumin.qi@oracle.com

Reviewed-by: stefank, tschatzl

Reviewed-by: sspitsyn, shade, dholmes, acorn

Summary: Remove the misleading malloc macro and cleanup the code
Reviewed-by: dsamersoff, kvn
Contributed-by: goetz.lindenmaier@sap.com

Summary: cleaned up warnings in solaris specific os code.
Reviewed-by: coleenp, fparain, dcubed
Contributed-by: gerald.thornbrugh@oracle.com

Summary: Add length checks where necessary
Reviewed-by: coleenp, mschoene

Summary: Use spin lock to manage ParkEvent and PlatformEvent free lists.
Reviewed-by: dholmes, fparain, dcubed, acorn

Reviewed-by: dholmes, kvn, stefank, twisti

8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
Summary: Make sure we only look for statically linked agents in the main process image
Reviewed-by: dsamersoff, bpittore, dcubed

Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation.
Reviewed-by: stefank, dholmes

Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso

Summary: Implement methods printing posix signal information and call them in unix os files.
Reviewed-by: kvn, dholmes, twisti
Contributed-by: thomas.stuefe@sap.com

Summary: Remove obsolete code that relates to ISM which was used only on Solaris 8.
Reviewed-by: kvn, twisti

Summary: Dl_info struct should only be used if dladdr() has returned non-zero (no errors) and always check the dladdr() return value; Dl_info.dli_sname and Dl_info.dli_saddr fields should only be used if non-NULL; update/improve runtime/6888954/vmerrors.sh test
Reviewed-by: dsamersoff, zgu, hseigel, coleenp

Summary: Fixed NMT race condition for realloc, uncommit and release
Reviewed-by: coleenp, ccheung

Summary: Removed restart macros from all os:close calls on Solaris, Linux, MacOS X platforms.
Reviewed-by: dcubed, dholmes

8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
Summary: Detect mmap() commit failures in Linux and Solaris os::commit_memory() impls and call vm_exit_out_of_memory(). Add os::commit_memory_or_exit(). Also tidy up some NMT accounting and some mmap() return value checking.
Reviewed-by: zgu, stefank, dholmes, dsamersoff

Reviewed-by: acorn, coleenp, sla
Contributed-by: NKaren Kinnear &lt;karen.kinnear@oracle.com&gt;, Bengt Rutisson &lt;bengt.rutisson@oracle.com&gt;, Calvin Cheung &lt;calvin.cheung@oracle.com&gt;, Erik Gahlin &lt;erik.gahlin@oracle.com&gt;, Erik Helin &lt;erik.helin@oracle.com&gt;, Jesper Wilhelmsson &lt;jesper.wilhelmsson@oracle.com&gt;, Keith McGuigan &lt;keith.mcguigan@oracle.com&gt;, Mattias Tobiasson &lt;mattias.tobiasson@oracle.com&gt;, Markus Gronlund &lt;markus.gronlund@oracle.com&gt;, Mikael Auno &lt;mikael.auno@oracle.com&gt;, Nils Eliasson &lt;nils.eliasson@oracle.com&gt;, Nils Loodin &lt;nils.loodin@oracle.com&gt;, Rickard Backman &lt;rickard.backman@oracle.com&gt;, Staffan Larsen &lt;staffan.larsen@oracle.com&gt;, Stefan Karlsson &lt;stefan.karlsson@oracle.com&gt;, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>

Reviewed-by: coleenp, zgu, hseigel

Reviewed-by: kvn, twisti

Summary: Add the -Wunused-function flag and remove a number of unused functions.
Reviewed-by: dholmes, coleenp, kvn

8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
Reviewed-by: zgu, iklam

Summary: Ergonomics now also takes available virtual memory into account when deciding for a heap size. The helper method to determine the maximum allocatable memory block now uses the appropriate OS specific calls to retrieve available virtual memory for the java process. In 32 bit environments this method now also searches for the maximum actually reservable amount of memory. Merge previously separate implementations for Linux/BSD/Solaris into a single method.
Reviewed-by: jmasa, tamao

Summary: Don't scan pages outside the given range.
Reviewed-by: jwilhelm, jmasa

Summary: Corrected virtual memory recording and tagging code when large pages are used
Reviewed-by: coleenp, ccheung

Summary: Save errno before processing signal, then restore it.
Reviewed-by: acorn, sspitsyn

Reviewed-by: dholmes, rbackman

Summary: misc correctness fixes
Reviewed-by: acorn, dholmes, dice, sspitsyn
Contributed-by: dave.dice@oracle.com

Summary: Phase 2 is removing '_g' support from the Runtime code.
Reviewed-by: dcubed, coleenp, hseigel
Contributed-by: ron.durbin@oracle.com

Reviewed-by: kvn

Reviewed-by: dholmes, rbackman, coleenp

Summary: dll_dir can contain multiple paths, need to parse them correctly when loading agents
Reviewed-by: dholmes, dlong
Contributed-by: bill.pittore@oracle.com

Summary: Enhanced virtual memory tracking to track committed regions as well as reserved regions, so NMT now can generate virtual memory map.
Reviewed-by: acorn, coleenp