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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2019-02-28 20:43:24 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2019-02-28 20:43:24 +0000 |
| commit | fe6f78eded2056fd0639536bbf10acb1cb7b583e (patch) | |
| tree | 4cffa8aa40d05fbd498d7d037b02a9ad9b01c888 /lib/hwasan | |
| parent | a82e016db19f5104441752ab6ff26129857ab885 (diff) | |
| download | compiler-rt-fe6f78eded2056fd0639536bbf10acb1cb7b583e.tar.gz | |
[hwasan] Fix vfork handling with large stack limit.
Remove the maximum stack cleanup size check. With ulimit -s unlimited
main thread stack can be very large, but we don't really have a choice
other than cleaning all of it. It should be reasonably fast - hwasan
cleans large shadow ranges with a single madvise call.
This change fixes check-hwasan after ulimit -s unlimited.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@355137 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/hwasan')
| -rw-r--r-- | lib/hwasan/hwasan.cpp | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lib/hwasan/hwasan.cpp b/lib/hwasan/hwasan.cpp index efcb311e0..d10318251 100644 --- a/lib/hwasan/hwasan.cpp +++ b/lib/hwasan/hwasan.cpp @@ -488,9 +488,7 @@ void __hwasan_handle_vfork(const void *sp_dst) { CHECK(t); uptr top = t->stack_top(); uptr bottom = t->stack_bottom(); - static const uptr kMaxExpectedCleanupSize = 64 << 20; // 64M - if (top == 0 || bottom == 0 || sp < bottom || sp >= top || - sp - bottom > kMaxExpectedCleanupSize) { + if (top == 0 || bottom == 0 || sp < bottom || sp >= top) { Report( "WARNING: HWASan is ignoring requested __hwasan_handle_vfork: " "stack top: %zx; current %zx; bottom: %zx \n" |