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Suppresses the tail-call optimization of StackGrowsDown() in GCC4.6 (by Paul Pluzhnikov).

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vladlosev 2011-06-13 20:09:57 +00:00
parent cc265df8b4
commit f3cf0a2316
1 changed files with 6 additions and 4 deletions
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10
src/gtest-death-test.cc
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@ -936,15 +936,17 @@ static int ExecDeathTestChildMain(void* child_arg) {
// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining // GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
// StackLowerThanAddress into StackGrowsDown, which then doesn't give // StackLowerThanAddress into StackGrowsDown, which then doesn't give
// correct answer. // correct answer.
bool StackLowerThanAddress(const void* ptr) GTEST_NO_INLINE_; void StackLowerThanAddress(const void* ptr, bool* result) GTEST_NO_INLINE_;
bool StackLowerThanAddress(const void* ptr) { void StackLowerThanAddress(const void* ptr, bool* result) {
int dummy; int dummy;
return &dummy < ptr; *result = (&dummy < ptr);
} }
bool StackGrowsDown() { bool StackGrowsDown() {
int dummy; int dummy;
return StackLowerThanAddress(&dummy); bool result;
StackLowerThanAddress(&dummy, &result);
return result;
} }
// A threadsafe implementation of fork(2) for threadsafe-style death tests // A threadsafe implementation of fork(2) for threadsafe-style death tests