Add a script to produce a syzygy-instrumented image of Chrome.dll

chrome/chrome_syzygy.gyp

Index: chrome/chrome_syzygy.gyp
diff --git a/chrome/chrome_syzygy.gyp b/chrome/chrome_syzygy.gyp
index 07c25ded410f50f524f1d7db97e7efb470bd49c1..7ea4a042fa9154a38558f376f6b4eb6c5894bf13 100644
--- a/chrome/chrome_syzygy.gyp
+++ b/chrome/chrome_syzygy.gyp
@@ -4,11 +4,9 @@
 {
   'conditions': [
     ['OS=="win" and fastbuild==0', {
-      # Reorder the initial chrome DLL executable, placing the optimized
-      # output and corresponding PDB file into the "syzygy" subdirectory.
-      # If there's a matching chrome.dll-ordering.json file present in
-      # the output directory, chrome.dll will be ordered according to that,
-      # otherwise it will be randomized.
+      # Reorder or instrument the initial chrome DLL executable, placing the
+      # optimized output and corresponding PDB file into the "syzygy"
+      # subdirectory.
       # This target won't build in fastbuild, since there are no PDBs.
       'targets': [
         {
@@ -21,26 +19,60 @@
           'variables': {
             'dest_dir': '<(PRODUCT_DIR)\\syzygy',
           },
-          'actions': [
-            {
-              'action_name': 'Reorder Chrome with Syzygy',
-              'msvs_cygwin_shell': 0,
-              'inputs': [
-                '<(PRODUCT_DIR)\\chrome.dll',
-                '<(PRODUCT_DIR)\\chrome.dll.pdb',
+          'conditions': [
+            ['asan!=1', {
+              # Reorder chrome DLL executable.
+              # If there's a matching chrome.dll-ordering.json file present in
+              # the output directory, chrome.dll will be ordered according to
+              # that, otherwise it will be randomized.
+              'actions': [
+                {
+                  'action_name': 'Reorder Chrome with Syzygy',
+                  'msvs_cygwin_shell': 0,
+                  'inputs': [
+                    '<(PRODUCT_DIR)\\chrome.dll',
+                    '<(PRODUCT_DIR)\\chrome.dll.pdb',
+                  ],
+                  'outputs': [
+                    '<(dest_dir)\\chrome.dll',
+                    '<(dest_dir)\\chrome.dll.pdb',
+                  ],
+                  'action': [
+                    'python',
+                    '<(DEPTH)/chrome/tools/build/win/syzygy_reorder.py',
+                    '--input_executable', '<(PRODUCT_DIR)\\chrome.dll',
+                    '--input_symbol', '<(PRODUCT_DIR)\\chrome.dll.pdb',
+                    '--destination_dir', '<(dest_dir)',
+                  ],
+                },
               ],
-              'outputs': [
-                '<(dest_dir)\\chrome.dll',
-                '<(dest_dir)\\chrome.dll.pdb',
+            }, {
+              # Instrument chrome DLL executable with SyzyAsan.
+              'actions': [
+                {
+                  'action_name': 'Instrument Chrome with SyzyAsan',
+                  'msvs_cygwin_shell': 0,
+                  'inputs': [
+                    '<(PRODUCT_DIR)\\chrome.dll',
+                    '<(PRODUCT_DIR)\\chrome.dll.pdb',
+                  ],
+                  'outputs': [
+                    '<(dest_dir)\\chrome.dll',
+                    '<(dest_dir)\\chrome.dll.pdb',
+                  ],
+                  'action': [
+                    'python',
+                    '<(DEPTH)/chrome/tools/build/win/syzygy_instrument.py',
+                    '--mode', 'asan',
+                    '--agent_dll', '<(DEPTH)\\third_party\\syzygy\\binaries'
+                        '\\exe\\asan_rtl.dll',
+                    '--input_executable', '<(PRODUCT_DIR)\\chrome.dll',
+                    '--input_symbol', '<(PRODUCT_DIR)\\chrome.dll.pdb',
+                    '--destination_dir', '<(dest_dir)',
+                  ],
+                },
               ],
-              'action': [
-                'python',
-                '<(DEPTH)/chrome/tools/build/win/syzygy_reorder.py',
-                '--input_executable', '<(PRODUCT_DIR)\\chrome.dll',
-                '--input_symbol', '<(PRODUCT_DIR)\\chrome.dll.pdb',
-                '--destination_dir', '<(dest_dir)',
-              ],
-            },
+            }],
           ],
         },
       ],