Add sandbox support for AsanCoverage.

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 0dac81d459486c2f04a8a862b9afedc92e47e284..162e83e60e3941ed61d5cfdc0447485701e07ae3 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -51,6 +51,10 @@
 #include "content/public/common/sandbox_init.h"
 #endif
 
+#if defined(ADDRESS_SANITIZER)
+#include <sanitizer/asan_interface.h>
+#endif
+
 const int kGpuTimeout = 10000;
 
 namespace content {
@@ -426,6 +430,18 @@ bool StartSandboxLinux(const gpu::GPUInfo& gpu_info,
     // has really been stopped.
     LinuxSandbox::StopThread(watchdog_thread);
   }
+
+#if defined(ADDRESS_SANITIZER)
+  LinuxSandbox* linux_sandbox = LinuxSandbox::GetInstance();
+  struct __sanitizer_sandbox_arguments* sanitizer_args =
+      new struct __sanitizer_sandbox_arguments;
+  memset(sanitizer_args, 0, sizeof(*sanitizer_args));

[jln (very slow on Chromium), 2014/05/13 01:17:35]

*sanitizer_args = {0}; instead?

[earthdok, 2014/05/14 17:00:26]

Done.

+  sanitizer_args->coverage_sandboxed = 1;
+  sanitizer_args->coverage_fd = -1;
+
+  linux_sandbox->SetSanitizerArgs(sanitizer_args);
+#endif
+
   // LinuxSandbox::InitializeSandbox() must always be called
   // with only one thread.
   res = LinuxSandbox::InitializeSandbox();