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| author | Kostya Serebryany <kcc@google.com> | 2015-11-14 00:50:23 +0000 |
|---|---|---|
| committer | Kostya Serebryany <kcc@google.com> | 2015-11-14 00:50:23 +0000 |
| commit | de01ea1f543e5dc31c1ea908b8061268ab325546 (patch) | |
| tree | bbe93a6dda5a8535371dd36fb8203e1098a954c5 /lib/asan | |
| parent | 8f5633c1a7812ec4c8b549c67675b98c1dade82a (diff) | |
[asan] add an experimental flag protect_shadow_gap. If set to false, the shadow gap will not be mprotect-ed and all hell may break loose. But this makes CUDA's cuInit() pass.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@253108 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/asan')
| -rw-r--r-- | lib/asan/asan_flags.inc | 1 | ||||
| -rw-r--r-- | lib/asan/asan_rtl.cc | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/lib/asan/asan_flags.inc b/lib/asan/asan_flags.inc index 406c494dd..c0ae02705 100644 --- a/lib/asan/asan_flags.inc +++ b/lib/asan/asan_flags.inc @@ -75,6 +75,7 @@ ASAN_FLAG(bool, check_malloc_usable_size, true, "295.*.") ASAN_FLAG(bool, unmap_shadow_on_exit, false, "If set, explicitly unmaps the (huge) shadow at exit.") +ASAN_FLAG(bool, protect_shadow_gap, true, "If set, mprotect the shadow gap") ASAN_FLAG(bool, print_stats, false, "Print various statistics after printing an error message or if " "atexit=1.") diff --git a/lib/asan/asan_rtl.cc b/lib/asan/asan_rtl.cc index 65e04972e..c22add53d 100644 --- a/lib/asan/asan_rtl.cc +++ b/lib/asan/asan_rtl.cc @@ -326,6 +326,8 @@ static void InitializeHighMemEnd() { } static void ProtectGap(uptr addr, uptr size) { + if (!flags()->protect_shadow_gap) + return; void *res = MmapNoAccess(addr, size, "shadow gap"); if (addr == (uptr)res) return; |