[scudo] Add last release time info to getStats (#170902)
Knowing when the last page release happened can help us figure out if
the page release is skipped or not.
NOKEYCHECK=True
GitOrigin-RevId: 570bceaa19829cb5943187b8ed5699a14a74042b
diff --git a/lib/scudo/standalone/primary64.h b/lib/scudo/standalone/primary64.h
index c2401c8..4eccf80 100644
--- a/lib/scudo/standalone/primary64.h
+++ b/lib/scudo/standalone/primary64.h
@@ -24,6 +24,8 @@
#include "thread_annotations.h"
#include "tracing.h"
+#include <inttypes.h>
+
namespace scudo {
// SizeClassAllocator64 is an allocator tuned for 64-bit address space.
@@ -1150,13 +1152,25 @@
"%s %02zu (%6zu): mapped: %6zuK popped: %7zu pushed: %7zu "
"inuse: %6zu total: %6zu releases attempted: %6zu last "
"released: %6zuK latest pushed bytes: %6zuK region: 0x%zx "
- "(0x%zx)\n",
+ "(0x%zx)",
Region->Exhausted ? "E" : " ", ClassId, getSizeByClassId(ClassId),
Region->MemMapInfo.MappedUser >> 10, Region->FreeListInfo.PoppedBlocks,
Region->FreeListInfo.PushedBlocks, InUseBlocks, TotalChunks,
Region->ReleaseInfo.NumReleasesAttempted,
Region->ReleaseInfo.LastReleasedBytes >> 10, RegionPushedBytesDelta >> 10,
Region->RegionBeg, getRegionBaseByClassId(ClassId));
+ const u64 CurTimeNs = getMonotonicTimeFast();
+ const u64 LastReleaseAtNs = Region->ReleaseInfo.LastReleaseAtNs;
+ if (LastReleaseAtNs != 0 && CurTimeNs != LastReleaseAtNs) {
+ const u64 DiffSinceLastReleaseNs =
+ CurTimeNs - Region->ReleaseInfo.LastReleaseAtNs;
+ const u64 LastReleaseSecAgo = DiffSinceLastReleaseNs / 1000000000;
+ const u64 LastReleaseMsAgo =
+ (DiffSinceLastReleaseNs % 1000000000) / 1000000;
+ Str->append("Latest release: %" PRIu64 ":%" PRIu64 " seconds ago",
+ LastReleaseSecAgo, LastReleaseMsAgo);
+ }
+ Str->append("\n");
}
template <typename Config>
