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[asan][win] Fix CreateThread leak #126738

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Merged
merged 1 commit into from
Feb 28, 2025
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[asan][win] Fix CreateThread leak #126738

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9 changes: 8 additions & 1 deletion compiler-rt/lib/asan/asan_win.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -145,7 +145,6 @@ static thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) {
t->GetStartData(params);

auto res = (*params.start_routine)(params.arg);
t->Destroy(); // POSIX calls this from TSD destructor.
return res;
}

Expand All @@ -166,6 +165,13 @@ INTERCEPTOR_WINAPI(HANDLE, CreateThread, LPSECURITY_ATTRIBUTES security,
thr_flags, tid);
}

INTERCEPTOR_WINAPI(void, ExitThread, DWORD dwExitCode) {
AsanThread *t = (AsanThread *)__asan::GetCurrentThread();
if (t)
t->Destroy();
REAL(ExitThread)(dwExitCode);
}

// }}}

namespace __asan {
Expand All @@ -181,6 +187,7 @@ void InitializePlatformInterceptors() {
(LPCWSTR)&InitializePlatformInterceptors, &pinned));

ASAN_INTERCEPT_FUNC(CreateThread);
ASAN_INTERCEPT_FUNC(ExitThread);
ASAN_INTERCEPT_FUNC(SetUnhandledExceptionFilter);

#ifdef _WIN64
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