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 97 matching lines @@
     __attribute__ ((visibility("default")));
 
 int posix_memalign(void** ptr, size_t alignment, size_t size) {
   // This will use the safe version of memalign, above.
   *ptr = memalign(alignment, size);
   return 0;
 }
 
 }  // extern C
 
+void* UncheckedMalloc(size_t size) {
+  return __libc_malloc(size);
+}
+
 #else
 
 // TODO(mostynb@opera.com): dlsym dance
 
 #endif  // LIBC_GLIBC && !USE_TCMALLOC
 
 #endif  // !*_SANITIZER
 
+#if defined(ADDRESS_SANITIZER) || defined(MEMORY_SANITIZER) || \
+    defined(THREAD_SANITIZER) || defined(LEAK_SANITIZER) || \
+    (!defined(LIBC_GLIBC) && !defined(USE_TCMALLOC))
+
+void* UncheckedMalloc(size_t size) {
+  return malloc(size);
+}
+
+#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, alloc_size);
+  return result;
+}
+
 void EnableTerminationOnHeapCorruption() {
   // On Linux, there nothing to do AFAIK.
 }
 
 void EnableTerminationOnOutOfMemory() {
 #if defined(OS_ANDROID)
   // Android doesn't support setting a new handler.
   DLOG(WARNING) << "Not feasible.";
 #else
   // Set the new-out of memory handler.
@@ skipping 38 matching lines @@
     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;
 }
 
 }  // namespace base