1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
--- contrib/libs/tcmalloc/tcmalloc/malloc_extension.cc (index)
+++ contrib/libs/tcmalloc/tcmalloc/malloc_extension.cc (working tree)
@@ -468,6 +468,20 @@ void MallocExtension::EnableForkSupport() {
#endif
}
+static std::atomic<MallocExtension::SoftMemoryLimitCallback*> SoftMemoryLimitHandler_;
+
+void MallocExtension::SetSoftMemoryLimitHandler(SoftMemoryLimitCallback* handler) {
+#if ABSL_INTERNAL_HAVE_WEAK_MALLOCEXTENSION_STUBS
+ SoftMemoryLimitHandler_.store(handler);
+#endif
+}
+
+MallocExtension::SoftMemoryLimitCallback* MallocExtension::GetSoftMemoryLimitHandler() {
+#if ABSL_INTERNAL_HAVE_WEAK_MALLOCEXTENSION_STUBS
+ return SoftMemoryLimitHandler_.load();
+#endif
+}
+
void MallocExtension::SetSampleUserDataCallbacks(
CreateSampleUserDataCallback create,
CopySampleUserDataCallback copy,
--- contrib/libs/tcmalloc/tcmalloc/malloc_extension.h (index)
+++ contrib/libs/tcmalloc/tcmalloc/malloc_extension.h (working tree)
@@ -475,6 +475,10 @@ class MallocExtension final {
// Allocator will continue to function correctly in the child, after calling fork().
static void EnableForkSupport();
+ using SoftMemoryLimitCallback = void();
+ static void SetSoftMemoryLimitHandler(SoftMemoryLimitCallback* handler);
+ static SoftMemoryLimitCallback* GetSoftMemoryLimitHandler();
+
using CreateSampleUserDataCallback = void*();
using CopySampleUserDataCallback = void*(void*);
using DestroySampleUserDataCallback = void(void*);
--- contrib/libs/tcmalloc/tcmalloc/page_allocator.cc (index)
+++ contrib/libs/tcmalloc/tcmalloc/page_allocator.cc (working tree)
@@ -151,6 +151,10 @@ void PageAllocator::ShrinkToUsageLimit() {
warned = true;
Log(kLogWithStack, __FILE__, __LINE__, "Couldn't respect usage limit of ",
limit_, "and OOM is likely to follow.");
+
+ if (auto* handler = MallocExtension::GetSoftMemoryLimitHandler()) {
+ (*handler)();
+ }
}
bool PageAllocator::ShrinkHardBy(Length pages) {
|
