Temporary allocation of 20Mb before and after call to ServiceProcessControl::GetHistograms.

chrome/browser/service_process/service_process_control.cc

Index: chrome/browser/service_process/service_process_control.cc
diff --git a/chrome/browser/service_process/service_process_control.cc b/chrome/browser/service_process/service_process_control.cc
index 193f1f08d97614e22ee4f5970f431b72e176dda8..5cd8371bf94b41cb373c3d9e796ec1049366639b 100644
--- a/chrome/browser/service_process/service_process_control.cc
+++ b/chrome/browser/service_process/service_process_control.cc
@@ -25,6 +25,18 @@
 
 using content::BrowserThread;
 
+namespace {
+
+void AllocDebugTest() {
+  // TODO(vitalybuka): Remove after few Canary builds.
+  // See http://crbug.com/406227
+  void* buffer = malloc(20 * 1024 * 1024);

[tapted, 2014/08/28 01:07:27]

nit: Maybe guard these lines in #if defined(OS_MACOSX) - pretty sure the crashes
are only happening there. I'd also say something on the function comment like

// Test: On Mac, launchd_msg_send tries to allocate a 10MB buffer, but doesn't
// handle errors and makes ugly crash dumps when close to OOM.

[Vitaly Buka (NO REVIEWS), 2014/08/28 03:24:51]

Done.

+  CHECK(buffer);
+  free(buffer);
+}
+
+}  // namespace
+
 // ServiceProcessControl implementation.
 ServiceProcessControl::ServiceProcessControl() {
 }
@@ -223,6 +235,7 @@ void ServiceProcessControl::OnHistograms(
 }
 
 void ServiceProcessControl::RunHistogramsCallback() {
+  AllocDebugTest();
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!histograms_callback_.is_null()) {
     histograms_callback_.Run();
@@ -259,6 +272,7 @@ bool ServiceProcessControl::GetCloudPrintProxyInfo(
 bool ServiceProcessControl::GetHistograms(
     const base::Closure& histograms_callback,
     const base::TimeDelta& timeout) {
+  AllocDebugTest();
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!histograms_callback.is_null());
   histograms_callback_.Reset();