[compiler-rt] 2c87571 - [test][hwasan] Deflake release-shadow.c
Vitaly Buka via llvm-commits
llvm-commits at lists.llvm.org
Tue Nov 21 19:28:14 PST 2023
Author: Vitaly Buka
Date: 2023-11-21T19:27:59-08:00
New Revision: 2c875719c841ff13b9b250e6ea97fc3e0aca2070
URL: https://github.com/llvm/llvm-project/commit/2c875719c841ff13b9b250e6ea97fc3e0aca2070
DIFF: https://github.com/llvm/llvm-project/commit/2c875719c841ff13b9b250e6ea97fc3e0aca2070.diff
LOG: [test][hwasan] Deflake release-shadow.c
kNumShadowPages=1024 helps to pass it consistenly (10k runs).
But to be sure also changing success condition to 8 out of 10.
Added:
Modified:
compiler-rt/test/hwasan/TestCases/Linux/release-shadow.c
Removed:
################################################################################
diff --git a/compiler-rt/test/hwasan/TestCases/Linux/release-shadow.c b/compiler-rt/test/hwasan/TestCases/Linux/release-shadow.c
index 0572a9217b67d99..705f5e6f433cc26 100644
--- a/compiler-rt/test/hwasan/TestCases/Linux/release-shadow.c
+++ b/compiler-rt/test/hwasan/TestCases/Linux/release-shadow.c
@@ -15,7 +15,7 @@
#include <sanitizer/hwasan_interface.h>
const unsigned char kTag = 42;
-const size_t kNumShadowPages = 256;
+const size_t kNumShadowPages = 1024;
const size_t kNumPages = 16 * kNumShadowPages;
const size_t kPageSize = 4096;
const size_t kMapSize = kNumPages * kPageSize;
@@ -23,7 +23,7 @@ const size_t kMapSize = kNumPages * kPageSize;
void sync_rss() {
char *page = (char *)mmap(0, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
// Linux kernel updates RSS counters after a set number of page faults.
- for (int i = 0; i < 10000; ++i) {
+ for (int i = 0; i < 100; ++i) {
page[0] = 42;
madvise(page, kPageSize, MADV_DONTNEED);
}
@@ -44,17 +44,18 @@ size_t current_rss() {
return rss;
}
-void test_rss_
diff erence(void *p) {
+int test_rss_
diff erence(void *p) {
__hwasan_tag_memory(p, kTag, kMapSize);
size_t rss_before = current_rss();
__hwasan_tag_memory(p, 0, kMapSize);
size_t rss_after = current_rss();
fprintf(stderr, "%zu -> %zu\n", rss_before, rss_after);
- assert(rss_before > rss_after);
+ if (rss_before <= rss_after)
+ return 0;
size_t
diff = rss_before - rss_after;
fprintf(stderr, "
diff %zu\n",
diff );
// Check that the
diff erence is at least close to kNumShadowPages.
- assert(
diff > kNumShadowPages / 2);
+ return
diff > kNumShadowPages / 2;
}
int main() {
@@ -64,9 +65,14 @@ int main() {
void *p = mmap(0, kMapSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
fprintf(stderr, "p = %p\n", p);
- test_rss_
diff erence(p);
- test_rss_
diff erence(p);
- test_rss_
diff erence(p);
+ size_t total_count = 10;
+ size_t success_count = 0;
+ for (size_t i = 0; i < total_count; ++i)
+ success_count += test_rss_
diff erence(p);
+
+ fprintf(stderr, "p = %p\n", p);
+ fprintf(stderr, "passed %zu out of %zu\n", success_count, total_count);
+ assert(success_count > total_count * 0.8);
return 0;
}
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