Make possible to check memory allocations inside chromium

base/process/memory_linux.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process/memory.h"
 
 #include <new>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 162 matching lines @@
     DVLOG(1) << "Adjusting oom_adj of " << process << " to " << score_str;
     int score_len = static_cast<int>(score_str.length());
     return (score_len == file_util::WriteFile(oom_file,
                                               score_str.c_str(),
                                               score_len));
   }
 
   return false;
 }
 
+#if defined(USE_TCMALLOC)
+void* tc_try_malloc(size_t size) __THROW;
+#endif
+
+void* UncheckedMalloc(size_t size) {
+#if defined(USE_TCMALLOC)
+  return tc_try_malloc(size);
+#elif defined(LIBC_GLIBC)
+  return __libc_malloc(size);
+#else
+#error UncheckedMalloc not implemented on this OS/platform
+#endif
+}
+
+void* UncheckedCalloc(size_t num_items, size_t size) {
+  const size_t alloc_size = num_items * size;
+
+  // Overflow check
+  if (alloc_size && (alloc_size / size) != num_items)
+    return NULL;
+
+  void* result = UncheckedMalloc(alloc_size);
+  if (result)
+    memset(result, 0, size);

[Scott Hess - ex-Googler, 2013/10/31 21:54:39]

size -> alloc_size.

+  return result;
+}
+
 }  // namespace base