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| author | Jan Vorlicek <janvorli@microsoft.com> | 2017-04-14 05:13:48 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-04-14 05:13:48 -0700 |
| commit | edd23a10bc574058a42c62dc829973dc48449837 (patch) | |
| tree | 62fe24ff8f046bca695ba3a8cc089a95d31fb321 /src/gc/unix | |
| parent | d09465f3c9ae99c3842ff22edb7f92695dd7c7ca (diff) | |
| download | coreclr-edd23a10bc574058a42c62dc829973dc48449837.tar.gz coreclr-edd23a10bc574058a42c62dc829973dc48449837.tar.bz2 coreclr-edd23a10bc574058a42c62dc829973dc48449837.zip | |
Implement MEM_RESET handling in VirtualAlloc on Unix (#10939)
Diffstat (limited to 'src/gc/unix')
| -rw-r--r-- | src/gc/unix/gcenv.unix.cpp | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/gc/unix/gcenv.unix.cpp b/src/gc/unix/gcenv.unix.cpp index 45489c69a7..cad83a342b 100644 --- a/src/gc/unix/gcenv.unix.cpp +++ b/src/gc/unix/gcenv.unix.cpp @@ -348,8 +348,20 @@ bool GCToOSInterface::VirtualDecommit(void* address, size_t size) // true if it has succeeded, false if it has failed bool GCToOSInterface::VirtualReset(void * address, size_t size, bool unlock) { - // TODO(CoreCLR#1259) pipe to madvise? - return false; + int st; +#if HAVE_MADV_FREE + // Try to use MADV_FREE if supported. It tells the kernel that the application doesn't + // need the pages in the range. Freeing the pages can be delayed until a memory pressure + // occurs. + st = madvise(address, size, MADV_FREE); + if (st != 0) +#endif + { + // In case the MADV_FREE is not supported, use MADV_DONTNEED + st = madvise(address, size, MADV_DONTNEED); + } + + return (st == 0); } // Check if the OS supports write watching |