Do not initiate Oilpan GC if under known stack pressure.

third_party/WebKit/Source/platform/heap/StackFrameDepth.cpp

 // 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.
 
 #include "platform/heap/StackFrameDepth.h"
 
 #include "public/platform/Platform.h"
 
 #if OS(WIN)
 #include <stddef.h>
@@ skipping 40 matching lines @@
 
     // Fallback version
     // Allocate a 32KB object on stack and query stack frame base after it.
     char dummy[kSafeStackFrameSize];
     s_stackFrameLimit = currentStackFrameBaseOnCallee(dummy);
 
     // Assert that the stack frame can be used.
     dummy[sizeof(dummy) - 1] = 0;
 }
 
+bool StackFrameDepth::hasInsufficientStackForGC()
+{
+    size_t stackSize = getUnderestimatedStackSize();
+    if (!stackSize)
+        return false;
+
+    Address stackBase = reinterpret_cast<Address>(getStackStart());
+    RELEASE_ASSERT(stackBase > reinterpret_cast<Address>(stackSize));
+    uintptr_t stackLimit = reinterpret_cast<uintptr_t>(stackBase - stackSize);
+
+    // If less than 8k of stack space is left, better not run a GC.
+    char dummy[2];
+    return (currentStackFrameBaseOnCallee(dummy) - stackLimit) < 8 * 1024;
+}
+
 size_t StackFrameDepth::getUnderestimatedStackSize()
 {
     // FIXME: ASAN bot uses a fake stack as a thread stack frame,
     // and its size is different from the value which APIs tells us.
 #if defined(ADDRESS_SANITIZER)
     return 0;
 #endif
 
     // FIXME: On Mac OSX and Linux, this method cannot estimate stack size
     // correctly for the main thread.
@@ skipping 95 matching lines @@
     return reinterpret_cast<void*>(__readgsqword(offsetof(NT_TIB64, StackBase)));
 #else
     return reinterpret_cast<void*>(__readfsdword(offsetof(NT_TIB, StackBase)));
 #endif
 #else
 #error Unsupported getStackStart on this platform.
 #endif
 }
 
 } // namespace blink