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author | Hans Wennborg <hans@hanshq.net> | 2015-07-21 22:46:35 +0000 |
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committer | Hans Wennborg <hans@hanshq.net> | 2015-07-21 22:46:35 +0000 |
commit | 7e43caf78b07fd99dd5a2ad3e611b5ca6abb0c03 (patch) | |
tree | 87aac16c2bd951317d931067d78a5fdfeec5403c | |
parent | 9de053e99a404c8ff8b6a801df6906821631a498 (diff) | |
download | compiler-rt-7e43caf78b07fd99dd5a2ad3e611b5ca6abb0c03.tar.gz |
Merging r242647 and r242651:
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r242647 | eugenis | 2015-07-19 12:57:13 -0700 (Sun, 19 Jul 2015) | 5 lines
[sanitizer] De-flake one test.
signal_segv_handler.cc occasionally fails due to a suspected kernel bug.
Increasing the mapped region size seems to make the test pass reliably.
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r242651 | dvyukov | 2015-07-19 14:44:49 -0700 (Sun, 19 Jul 2015) | 6 lines
asan: fix a test
Page size is not necessary 4096.
Use sysconf to obtain page size.
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_37@242848 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r-- | test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc b/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc index 23e32a884..643fb48ae 100644 --- a/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc +++ b/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc @@ -18,23 +18,27 @@ #include <signal.h> #include <sys/mman.h> #include <string.h> +#include <unistd.h> +unsigned long page_size; void *guard; void handler(int signo, siginfo_t *info, void *uctx) { - mprotect(guard, 4096, PROT_READ | PROT_WRITE); + mprotect(guard, page_size, PROT_READ | PROT_WRITE); } int main() { + page_size = sysconf(_SC_PAGESIZE); struct sigaction a, old; memset(&a, 0, sizeof(a)); memset(&old, 0, sizeof(old)); a.sa_sigaction = handler; a.sa_flags = SA_SIGINFO; sigaction(SIGSEGV, &a, &old); - guard = mmap(0, 4096, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0); + guard = mmap(0, 3 * page_size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0); + guard = (char*)guard + page_size; // work around a kernel bug for (int i = 0; i < 1000000; i++) { - mprotect(guard, 4096, PROT_NONE); + mprotect(guard, page_size, PROT_NONE); *(int*)guard = 1; } sigaction(SIGSEGV, &old, 0); |