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| author | William Pitcock <nenolod@dereferenced.org> | 2011-05-03 04:15:51 -0500 |
|---|---|---|
| committer | William Pitcock <nenolod@dereferenced.org> | 2011-05-03 04:17:19 -0500 |
| commit | 721152a5a1169992f27df9806f608fda87d773f0 (patch) | |
| tree | 1d717d4907f04f746c7f8bb1344d30dd97ee2a7d /main/xulrunner/xulrunner-jemalloc-aslr.patch | |
| parent | a36b43b74c011c0ed21e31ac074887521ac0129c (diff) | |
| download | aports-721152a5a1169992f27df9806f608fda87d773f0.tar.bz2 aports-721152a5a1169992f27df9806f608fda87d773f0.tar.xz | |
main/xulrunner: fix jemalloc under recent PaX kernel profiles (mozilla.org 470217)
Diffstat (limited to 'main/xulrunner/xulrunner-jemalloc-aslr.patch')
| -rw-r--r-- | main/xulrunner/xulrunner-jemalloc-aslr.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/main/xulrunner/xulrunner-jemalloc-aslr.patch b/main/xulrunner/xulrunner-jemalloc-aslr.patch new file mode 100644 index 000000000..4a1579649 --- /dev/null +++ b/main/xulrunner/xulrunner-jemalloc-aslr.patch @@ -0,0 +1,54 @@ +diff -r 9259fdc3570c memory/jemalloc/jemalloc.c +--- a/memory/jemalloc/jemalloc.c Wed Jan 27 16:20:05 2010 -0800 ++++ b/memory/jemalloc/jemalloc.c Wed Jan 27 23:03:56 2010 -0600 +@@ -373,7 +373,7 @@ + static const bool __isthreaded = true; + #endif + +-#if defined(MOZ_MEMORY_SOLARIS) && defined(MAP_ALIGN) && !defined(JEMALLOC_NEVER_USES_MAP_ALIGN) ++#if defined(MOZ_MEMORY_SOLARIS) || defined(MOZ_MEMORY_LINUX) || defined(MOZ_MEMORY_BSD) + #define JEMALLOC_USES_MAP_ALIGN /* Required on Solaris 10. Might improve performance elsewhere. */ + #endif + +@@ -2178,20 +2178,31 @@ + * We don't use MAP_FIXED here, because it can cause the *replacement* + * of existing mappings, and we only want to create new mappings. + */ +-#ifdef MALLOC_PAGEFILE +- if (pfd != -1) { +- ret = mmap((void *)alignment, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | +- MAP_NOSYNC | MAP_ALIGN, pfd, 0); +- } else +-#endif +- { +- ret = mmap((void *)alignment, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | +- MAP_NOSYNC | MAP_ALIGN | MAP_ANON, -1, 0); +- } ++ ret = mmap(NULL, size + alignment, PROT_READ | PROT_WRITE, MAP_PRIVATE | ++ MAP_NOSYNC| MAP_ANON, -1, 0); + assert(ret != NULL); + + if (ret == MAP_FAILED) + ret = NULL; ++ else { ++ uintptr_t aligned_ret; ++ size_t extra_size; ++ ++ aligned_ret = (uintptr_t)ret + alignment - 1; ++ aligned_ret &= ~(alignment - 1); ++ extra_size = aligned_ret - (uintptr_t)ret; ++ munmap(ret, extra_size); ++ munmap(ret + extra_size + size, alignment - extra_size); ++ ret = (void *)aligned_ret; ++#ifdef MALLOC_PAGEFILE ++ if (pfd != -1) { ++ ret = mmap(ret, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | ++ MAP_NOSYNC | MAP_FIXED, pfd, 0); ++ } ++ if (ret == MAP_FAILED) ++ ret = NULL; ++#endif ++ } + return (ret); + } + #endif |