From 681454dae48f109abf68c424c9d2e6db9a092238 Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Tue, 5 Nov 2019 17:32:29 -0500 Subject: [PATCH] Googletest export Clone+exec death test allocates a single page of stack to run chdir + exec on. This is not enough when gtest is built with ASan and run on particular hardware. With ASan on x86_64, ExecDeathTestChildMain has frame size of 1728 bytes. Call to chdir() in ExecDeathTestChildMain ends up in _dl_runtime_resolve_xsavec, which attempts to save register state on the stack; according to cpuid(0xd) XSAVE register save area size is 2568 on my machine. This results in something like this in all death tests: Result: died but not with expected error. ... [ DEATH ] AddressSanitizer:DEADLYSIGNAL [ DEATH ] ================================================================= [ DEATH ] ==178637==ERROR: AddressSanitizer: stack-overflow on address ... PiperOrigin-RevId: 278709790 --- googletest/src/gtest-death-test.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/googletest/src/gtest-death-test.cc b/googletest/src/gtest-death-test.cc index da09a1cf..5d1031be 100644 --- a/googletest/src/gtest-death-test.cc +++ b/googletest/src/gtest-death-test.cc @@ -1364,7 +1364,7 @@ static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) { if (!use_fork) { static const bool stack_grows_down = StackGrowsDown(); - const auto stack_size = static_cast(getpagesize()); + const auto stack_size = static_cast(getpagesize() * 2); // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead. void* const stack = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);