Wire in GWP-ASan PartitionAlloc into chrome

Enable GWP-ASan for PartitionAlloc support in chrome if the newly
introduced enable_gwp_asan_partitionalloc flag is set.

CQ-DEPEND=CL:1601972

Bug: 956824
Change-Id: I38ebf62c11449813b71691053597d76ee7006a90
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1602317Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vlad Tsyrklevich <vtsyrklevich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658774}

chrome/BUILD.gn

@@ -1496,7 +1496,7 @@ group("browser_dependencies") {
     }
   }
 
-  if (enable_gwp_asan_malloc) {
+  if (enable_gwp_asan_malloc || enable_gwp_asan_partitionalloc) {
     public_deps += [ "//components/gwp_asan/client" ]
   }
 
@@ -1542,7 +1542,7 @@ group("child_dependencies") {
     public_deps += [ "//components/nacl/renderer/plugin:nacl_trusted_plugin" ]
   }
 
-  if (enable_gwp_asan_malloc) {
+  if (enable_gwp_asan_malloc || enable_gwp_asan_partitionalloc) {
     public_deps += [ "//components/gwp_asan/client" ]
   }
 
@@ -1897,7 +1897,7 @@ if (is_android) {
       deps += [ "//third_party/gvr-android-sdk:gvr_shim" ]
     }
 
-    if (enable_gwp_asan_malloc) {
+    if (enable_gwp_asan_malloc || enable_gwp_asan_partitionalloc) {
       deps += [ "//components/gwp_asan/client" ]
     }
   }

chrome/app/BUILD.gn

@@ -400,7 +400,7 @@ static_library("test_support") {
     deps += [ "//services/ws/public/mojom:constants" ]
   }
 
-  if (enable_gwp_asan_malloc) {
+  if (enable_gwp_asan_malloc || enable_gwp_asan_partitionalloc) {
     deps += [ "//components/gwp_asan/client" ]
   }
 }

chrome/app/chrome_main_delegate.cc

@@ -166,7 +166,8 @@
 #include "chrome/child/pdf_child_init.h"
 #endif
 
-#if BUILDFLAG(ENABLE_GWP_ASAN_MALLOC)
+#if BUILDFLAG(ENABLE_GWP_ASAN_MALLOC) || \
+    BUILDFLAG(ENABLE_GWP_ASAN_PARTITIONALLOC)
 #include "components/gwp_asan/client/gwp_asan.h"  // nogncheck
 #endif
 
@@ -559,6 +560,7 @@ void ChromeMainDelegate::PostTaskSchedulerStart() {
 
 void ChromeMainDelegate::PostFieldTrialInitialization() {
 #if BUILDFLAG(ENABLE_GWP_ASAN_MALLOC)
+  {
     version_info::Channel channel = chrome::GetChannel();
     bool is_canary_dev = (channel == version_info::Channel::CANARY ||
                           channel == version_info::Channel::DEV);
@@ -568,6 +570,16 @@ void ChromeMainDelegate::PostFieldTrialInitialization() {
         command_line.GetSwitchValueASCII(switches::kProcessType);
     bool is_browser_process = process_type.empty();
     gwp_asan::EnableForMalloc(is_canary_dev, is_browser_process);
+  }
+#endif
+
+#if BUILDFLAG(ENABLE_GWP_ASAN_PARTITIONALLOC)
+  {
+    version_info::Channel channel = chrome::GetChannel();
+    bool is_canary_dev = (channel == version_info::Channel::CANARY ||
+                          channel == version_info::Channel::DEV);
+    gwp_asan::EnableForPartitionAlloc(is_canary_dev);
+  }
 #endif
 }
 

components/gwp_asan/buildflags/BUILD.gn

@@ -7,5 +7,8 @@ import("//components/gwp_asan/buildflags/buildflags.gni")
 
 buildflag_header("buildflags") {
   header = "buildflags.h"
-  flags = [ "ENABLE_GWP_ASAN_MALLOC=$enable_gwp_asan_malloc" ]
+  flags = [
+    "ENABLE_GWP_ASAN_MALLOC=$enable_gwp_asan_malloc",
+    "ENABLE_GWP_ASAN_PARTITIONALLOC=$enable_gwp_asan_partitionalloc",
+  ]
 }

components/gwp_asan/buildflags/buildflags.gni

@@ -5,6 +5,8 @@
 import("//build/config/allocator.gni")
 
 declare_args() {
-  # Is GWP-ASan malloc() hooking enabled for chrome/ on a given platform.
+  # Is GWP-ASan malloc/PartitionAlloc hooking enabled for chrome/ on a given
+  # platform.
   enable_gwp_asan_malloc = (is_win || is_mac) && use_allocator_shim
+  enable_gwp_asan_partitionalloc = (is_win || is_mac) && use_partition_alloc
 }