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diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp
index 8fd398564280..b7c4820971bb 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cpp
@@ -29,6 +29,7 @@ void *BackgroundThread(void *arg) {
const uptr hard_rss_limit_mb = common_flags()->hard_rss_limit_mb;
const uptr soft_rss_limit_mb = common_flags()->soft_rss_limit_mb;
const bool heap_profile = common_flags()->heap_profile;
+ const bool rss_limit_heap_profile = common_flags()->rss_limit_heap_profile;
uptr prev_reported_rss = 0;
uptr prev_reported_stack_depot_size = 0;
bool reached_soft_rss_limit = false;
@@ -56,6 +57,10 @@ void *BackgroundThread(void *arg) {
Report("%s: hard rss limit exhausted (%zdMb vs %zdMb)\n",
SanitizerToolName, hard_rss_limit_mb, current_rss_mb);
DumpProcessMap();
+ if (rss_limit_heap_profile) {
+ Printf("\n\nHEAP PROFILE at RSS %zdMb\n", current_rss_mb);
+ __sanitizer_print_memory_profile(90, 20);
+ }
Die();
}
if (soft_rss_limit_mb) {
@@ -63,6 +68,11 @@ void *BackgroundThread(void *arg) {
reached_soft_rss_limit = true;
Report("%s: soft rss limit exhausted (%zdMb vs %zdMb)\n",
SanitizerToolName, soft_rss_limit_mb, current_rss_mb);
+ if (rss_limit_heap_profile) {
+ Printf("\n\nHEAP PROFILE at RSS %zdMb\n", current_rss_mb);
+ __sanitizer_print_memory_profile(90, 20);
+ rss_during_last_reported_profile = current_rss_mb;
+ }
SetRssLimitExceeded(true);
} else if (soft_rss_limit_mb >= current_rss_mb &&
reached_soft_rss_limit) {
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_flags.inc b/compiler-rt/lib/sanitizer_common/sanitizer_flags.inc
index 6148ae56067c..a0fbb8e14bd5 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_flags.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_flags.inc
@@ -147,6 +147,9 @@ COMMON_FLAG(uptr, max_allocation_size_mb, 0,
"If non-zero, malloc/new calls larger than this size will return "
"nullptr (or crash if allocator_may_return_null=false).")
COMMON_FLAG(bool, heap_profile, false, "Experimental heap profiler, asan-only")
+COMMON_FLAG(bool, rss_limit_heap_profile, false,
+ "Experimental heap profiler (only when hard/soft rss limit "
+ "exceeded, asan-only")
COMMON_FLAG(s32, allocator_release_to_os_interval_ms,
((bool)SANITIZER_FUCHSIA || (bool)SANITIZER_WINDOWS) ? -1 : 5000,
"Only affects a 64-bit allocator. If set, tries to release unused "
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