Re-land: Instrumented libraries: add a target for pre-built libraries.

With use_prebuilt_instrumented_libraries=1 in GYP_DEFINES, binaries are now
unpacked from archive and placed into output dir.

BUG=462636
TBR=glider@chromium.org, thakis@chromium.org

Review URL: https://codereview.chromium.org/1003273006

Cr-Commit-Position: refs/heads/master@{#321846}

build/common.gypi

@@ -450,10 +450,16 @@
       # -fsanitize=vptr only works with clang, but ubsan_vptr=1 implies clang=1
       'ubsan_vptr%': 0,
 
-      # Use the dynamic libraries instrumented by one of the sanitizers
-      # instead of the standard system libraries.
+      # Use dynamic libraries instrumented by one of the sanitizers
+      # instead of the standard system libraries. Set this flag to build the
+      # libraries from source.
       'use_instrumented_libraries%': 0,
 
+      # Use dynamic libraries instrumented by one of the sanitizers
+      # instead of the standard system libraries. Set this flag to download
+      # prebuilt binaries from GCS.
+      'use_prebuilt_instrumented_libraries%': 0,
+
       # Use libc++ (third_party/libc++ and third_party/libc++abi) instead of
       # stdlibc++ as standard library. This is intended to use for instrumented
       # builds.
@@ -1153,6 +1159,7 @@
     'ubsan_blacklist%': '<(ubsan_blacklist)',
     'ubsan_vptr%': '<(ubsan_vptr)',
     'use_instrumented_libraries%': '<(use_instrumented_libraries)',
+    'use_prebuilt_instrumented_libraries%': '<(use_prebuilt_instrumented_libraries)',
     'use_custom_libcxx%': '<(use_custom_libcxx)',
     'use_system_libcxx%': '<(use_system_libcxx)',
     'clang_type_profiler%': '<(clang_type_profiler)',
@@ -4413,6 +4420,11 @@
               '<(DEPTH)/third_party/instrumented_libraries/instrumented_libraries.gyp:instrumented_libraries',
             ],
           }],
+          ['use_prebuilt_instrumented_libraries==1', {
+            'dependencies': [
+              '<(DEPTH)/third_party/instrumented_libraries/instrumented_libraries.gyp:prebuilt_instrumented_libraries',
+            ],
+          }],
           ['use_custom_libcxx==1', {
             'dependencies': [
               '<(DEPTH)/buildtools/third_party/libc++/libc++.gyp:libcxx_proxy',

third_party/instrumented_libraries/instrumented_libraries.gyp

@@ -81,6 +81,57 @@
   },
 
   'targets': [
+    {
+      'target_name': 'prebuilt_instrumented_libraries',
+      'type': 'none',
+      'variables': {
+        'prune_self_dependency': 1,
+        # Don't add this target to the dependencies of targets with type=none.
+        'link_dependency': 1,
+        'conditions': [
+          ['msan==1', {
+            'conditions': [
+              ['msan_track_origins==2', {
+                'archive_name': 'msan-chained-origins-<(_ubuntu_release)',
+              }, {
+                'archive_name': 'UNSUPPORTED_CONFIGURATION'
+              }],
+          ]}, {
+              'archive_name': 'UNSUPPORTED_CONFIGURATION'
+          }],
+        ],
+      },
+      'actions': [
+        {
+          'action_name': 'unpack_<(archive_name).tgz',
+          'inputs': [
+            'binaries/<(archive_name).tgz',
+          ],
+          'outputs': [
+            '<(PRODUCT_DIR)/instrumented_libraries_prebuilt/<(archive_name).txt',
+          ],
+          'action': [
+            'scripts/unpack_binaries.sh',
+            'binaries/<(archive_name).tgz',
+            '<(PRODUCT_DIR)/instrumented_libraries_prebuilt/',
+            '<(PRODUCT_DIR)/instrumented_libraries_prebuilt/<(archive_name).txt',
+          ],
+        },
+      ],
+      'direct_dependent_settings': {
+        'target_conditions': [
+          ['_toolset=="target"', {
+            'ldflags': [
+              # Add a relative RPATH entry to Chromium binaries. This puts
+              # instrumented DSOs before system-installed versions in library
+              # search path.
+              '-Wl,-R,\$$ORIGIN/instrumented_libraries_prebuilt/<(_sanitizer_type)/<(_libdir)/',
+              '-Wl,-z,origin',
+            ],
+          }],
+        ],
+      },
+    },
     {
       'target_name': 'instrumented_libraries',
       'type': 'none',
@@ -174,7 +225,9 @@
         'target_conditions': [
           ['_toolset=="target"', {
             'ldflags': [
-              # Add RPATH to result binary to make it linking instrumented libraries ($ORIGIN means relative RPATH)
+              # Add a relative RPATH entry to Chromium binaries. This puts
+              # instrumented DSOs before system-installed versions in library
+              # search path.
               '-Wl,-R,\$$ORIGIN/instrumented_libraries/<(_sanitizer_type)/<(_libdir)/',
               '-Wl,-z,origin',
             ],

third_party/instrumented_libraries/scripts/unpack_binaries.sh

+#!/bin/bash
+# Copyright 2015 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.
+
+# Unpacks an archive containing prebuilt instrumented libraries into output dir.
+
+archive_file=$1
+target_dir=$2
+stamp_file=$3
+
+rm ${target_dir}/* -rf
+tar -zxf ${archive_file} -C ${target_dir}
+
+touch ${stamp_file}