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[asan] initialize fake_stack_ to 0 before we call SetThreadStackAndTls, because that may actually try to use fake_stack_ (still don't know how). Yet another case where we desperately want https://sourceware.org/glibc/wiki/ThreadPropertiesAPI

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llvm-svn: 210315
This commit is contained in:
Kostya Serebryany 2014-06-06 07:35:35 +00:00
parent 27f333d3ad
commit 558b3363a7
1 changed files with 3 additions and 1 deletions
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4
compiler-rt/lib/asan/asan_thread.cc
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@ -141,7 +141,10 @@ FakeStack *AsanThread::AsyncSignalSafeLazyInitFakeStack() {
}
void AsanThread::Init() {
fake_stack_ = 0; // Will be initialized lazily if needed.
CHECK_EQ(this->stack_size(), 0U);
SetThreadStackAndTls();
CHECK_GT(this->stack_size(), 0U);
CHECK(AddrIsInMem(stack_bottom_));
CHECK(AddrIsInMem(stack_top_ - 1));
ClearShadowForThreadStackAndTLS();
@ -149,7 +152,6 @@ void AsanThread::Init() {
VReport(1, "T%d: stack [%p,%p) size 0x%zx; local=%p\n", tid(),
(void *)stack_bottom_, (void *)stack_top_, stack_top_ - stack_bottom_,
&local);
fake_stack_ = 0; // Will be initialized lazily if needed.
AsanPlatformThreadInit();
}