Type profiler by intercepting 'new' and 'delete' expressions.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 4b6cd7ea834a87dc543524cf1796af8b9f766d74..cac76adb44b7c246029cf8242ed60c1b5ac6e004 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -253,6 +253,13 @@
       # See http://clang.llvm.org/docs/ThreadSanitizer.html
       'tsan%': 0,
 
+      # Use a modified version of Clang to intercept allocated types and sizes
+      # for allocated objects. -fintercept-allocated-type only works with the
+      # modified clang, but clang_use_allocated_type=1 implies clang=1
+      # TODO(dmikurube): Add a link to a description page.
+      # TODO(dmikurube): Support mac with another AllocatedTypeMap store.
+      'clang_use_allocated_type%': 0,
+
       # Set to true to instrument the code with function call logger.
       # See src/third_party/cygprofile/cyg-profile.cc for details.
       'order_profiling%': 0,
@@ -588,6 +595,7 @@
     'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
     'asan%': '<(asan)',
     'tsan%': '<(tsan)',
+    'clang_use_allocated_type%': '<(clang_use_allocated_type)',
     'order_profiling%': '<(order_profiling)',
     'order_text_section%': '<(order_text_section)',
     'enable_extensions%': '<(enable_extensions)',
@@ -1191,6 +1199,12 @@
         'clang%': 1,
       }],
 
+      ['clang_use_allocated_type==1', {
+        'clang%': 1,
+        'clang_use_chrome_plugins%': 0,
+        'make_clang_dir%': 'third_party/llvm-allocated-type/Linux_x64',
+      }],
+
       # On valgrind bots, override the optimizer settings so we don't inline too
       # much and make the stacks harder to figure out.
       #
@@ -1596,6 +1610,31 @@
       }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
+      ['_type=="executable" or _type=="loadable_module"', {
+        'target_conditions': [
+          # Some binaries doesn't use tcmalloc.  We use empty interceptors
+          # for these binaries since the allocated type mapping is recorded
+          # in a tcmalloc-dependent data structure.
+          ['_target_name=="mksnapshot" or _target_name=="protoc" or _target_name=="ppGoogleNaClPluginChrome"', {
+            # Ignore allocated types.
+            'conditions': [
+              ['clang_use_allocated_type==1', {
+                'dependencies': [
+                  '<!(realpath <(DEPTH)/base/allocator/allocator.gyp)' + ':allocated_type_ignore#target',
+                ]},
+              ],
+            ]}, {
+            # Store allocated types in TCMalloc's allocated_type_map (extended).
+            'conditions': [
+              ['clang_use_allocated_type==1', {
+                'dependencies': [
+                  '<!(realpath <(DEPTH)/base/allocator/allocator.gyp)' + ':allocated_type_tcmalloc#target',
+                ]},
+              ],
+            ]},
+          ]
+        ]},
+      ],
       ['enable_wexit_time_destructors==1', {
         'conditions': [
           [ 'clang==1', {
@@ -2342,6 +2381,22 @@
               '-fcolor-diagnostics',
             ],
           }],
+          ['clang_use_allocated_type==1', {
+            'cflags_cc!': ['-fno-rtti'],
+            'cflags_cc+': ['-gline-tables-only'],
+            'target_conditions': [
+                ['_target_name!="allocator" and _target_name!="allocator_extension_thunks" and _target_name!="libcmt" and _target_name!="allocator_extension_thunks_win64" and _target_name!="allocated_type_log" and _target_name!="allocated_type_ignore" and _target_name!="allocated_type_tcmalloc"', {
+                    'cflags_cc+': [
+                        '-frtti',
+                        '-fintercept-allocation-functions',
+                        '-I../../base/allocator',
+                        '-include',
+                        'allocated_type.h',
+                    ],
+                }],
+            ],
+            'defines': ['USE_ALLOCATED_TYPE'],
+          }],
           ['asan==1', {
             'target_conditions': [
               ['_toolset=="target"', {