1 files changed, 66 insertions, 0 deletions
diff --git a/xpcom/string/nsStringStats.cpp b/xpcom/string/nsStringStats.cpp
new file mode 100644
index 0000000000..7fc3d82ad5
--- /dev/null
+++ b/xpcom/string/nsStringStats.cpp
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsStringStats.h"
+
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/MemoryReporting.h"
+#include "nsString.h"
+
+#include <stdint.h>
+#include <stdio.h>
+
+#ifdef XP_WIN
+#  include <windows.h>
+#  include <process.h>
+#else
+#  include <unistd.h>
+#  include <pthread.h>
+#endif
+
+nsStringStats gStringStats;
+
+nsStringStats::~nsStringStats() {
+  // this is a hack to suppress duplicate string stats printing
+  // in seamonkey as a result of the string code being linked
+  // into seamonkey and libxpcom! :-(
+  if (!mAllocCount && !mAdoptCount) {
+    return;
+  }
+
+  // Only print the stats if we detect a leak.
+  if (mAllocCount <= mFreeCount && mAdoptCount <= mAdoptFreeCount) {
+    return;
+  }
+
+  printf("nsStringStats\n");
+  printf(" => mAllocCount:     % 10d\n", int(mAllocCount));
+  printf(" => mReallocCount:   % 10d\n", int(mReallocCount));
+  printf(" => mFreeCount:      % 10d", int(mFreeCount));
+  if (mAllocCount > mFreeCount) {
+    printf("  --  LEAKED %d !!!\n", mAllocCount - mFreeCount);
+  } else {
+    printf("\n");
+  }
+  printf(" => mShareCount:     % 10d\n", int(mShareCount));
+  printf(" => mAdoptCount:     % 10d\n", int(mAdoptCount));
+  printf(" => mAdoptFreeCount: % 10d", int(mAdoptFreeCount));
+  if (mAdoptCount > mAdoptFreeCount) {
+    printf("  --  LEAKED %d !!!\n", mAdoptCount - mAdoptFreeCount);
+  } else {
+    printf("\n");
+  }
+
+#ifdef XP_WIN
+  auto pid = uintptr_t(_getpid());
+  auto tid = uintptr_t(GetCurrentThreadId());
+#else
+  auto pid = uintptr_t(getpid());
+  auto tid = uintptr_t(pthread_self());
+#endif
+
+  printf(" => Process ID: %" PRIuPTR ", Thread ID: %" PRIuPTR "\n", pid, tid);
+}