Use tcmalloc on Linux

tools/gyp/configurations_make.gypi

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'dart_debug_optimization_level%': '2',
   },
   'target_defaults': {
     'configurations': {
@@ skipping 281 matching lines @@
               '-m32',
               '-msse2',
               '-mfpmath=sse',
             ],
             'ldflags': [
               '-m32',
             ],
         }]]
       },
 
+      # These flags are needed for tcmalloc to be able to collect stack traces
+      # for heap profiling on mips.
+      'Dart_Linux_xmips_Debug': {
+        'abstract': 1,
+        'target_conditions': [
+          ['_toolset=="target"', {
+            'cflags!': [
+              '-fno-exceptions',
+            ],
+            'cflags': [
+              '-fexceptions',
+              '-funwind-tables',
+            ],
+          }],
+        ],
+      },
+
+      # These flags are needed for tcmalloc to be able to collect stack traces
+      # for heap profiling on mips.
+      'Dart_Linux_xmips_Release': {
+        'abstract': 1,
+        'target_conditions': [
+          ['_toolset=="target"', {
+            'cflags!': [
+              '-fno-exceptions',
+            ],
+            'cflags': [
+              '-fexceptions',
+              '-funwind-tables',
+            ],
+          }],
+        ],
+      },
+
       # MIPS native build
       'Dart_Linux_mips_Base': {
         'abstract': 1,
         'cflags': [
           '-march=mips32',
           '-mhard-float',
           '-fno-strict-overflow',
         ],
       },
 
@@ skipping 32 matching lines @@
           '-ffunction-sections',
           '-fomit-frame-pointer',
         ],
         'ldflags': [
           '-Wl,--gc-sections',
         ],
       },
     },
   },
 }