Enable TCMalloc on Linux by default.

This change also reworks the tcmalloc dependency to be added only to chrome and test_shell, instead of base.  This is necessary since otherwise tcmalloc will be double initialized (by both the main executable and dlopen'd shared objects like the npapitestplugin.so).
Add valgrind suppressions.  This are invalid reads on static initialization in the VDSOSupport module.  I haven't investigated it yet, but I suspect they're benign.
BUG=http://crbug.com/28149, http://crbug.com/28385

Review URL: http://codereview.chromium.org/399081

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@33010 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 18 insertions, 0 deletions

diff --git a/chrome/app/chrome_exe_main_gtk.cc b/chrome/app/chrome_exe_main_gtk.cc
index 9c84f16..cd2edcb 100644
--- a/chrome/app/chrome_exe_main_gtk.cc
+++ b/chrome/app/chrome_exe_main_gtk.cc
@@ -16,12 +16,30 @@
 
 extern "C" {
 int ChromeMain(int argc, const char** argv);
+
+#if defined(LINUX_USE_TCMALLOC)
+
+int tc_set_new_mode(int mode);
+
+#endif  // defined(LINUX_USE_TCMALLOC)
+
 }
 
 int main(int argc, const char** argv) {
   base::EnableTerminationOnHeapCorruption();
   base::EnableTerminationOnOutOfMemory();
 
+  // NOTE(willchan): One might ask why this call is done here rather than in
+  // process_util_linux.cc with the definition of
+  // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
+  // dependency on TCMalloc.  Really, we ought to have our allocator shim code
+  // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.  This
+  // works for now.
+#if defined(LINUX_USE_TCMALLOC)
+  // For tcmalloc, we need to tell it to behave like new.
+  tc_set_new_mode(1);
+#endif
+
   // The exit manager is in charge of calling the dtors of singletons.
   // Win has one here, but we assert with multiples from BrowserMain() if we
   // keep it.