Handle OOM failures correctly in the CEntryStub when embedders set V8::IgnoreOutOfMemoryException()

src/arm/code-stubs-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3514 matching lines @@
   // check if we should retry or throw exception
   Label retry;
   __ bind(&failure_returned);
   STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0);
   __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize));
   __ b(eq, &retry);
 
   // Special handling of out of memory exceptions.
   JumpIfOOM(masm, r0, ip, throw_out_of_memory_exception);
 
-  // Retrieve the pending exception and clear the variable.
+  // Retrieve the pending exception.
+  __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
+                                       isolate)));
+  __ ldr(r0, MemOperand(ip));
+
+  // See if we just retrieved an OOM exception.
+  JumpIfOOM(masm, r0, ip, throw_out_of_memory_exception);
+
+  // Clear the pending exception.
   __ mov(r3, Operand(isolate->factory()->the_hole_value()));
   __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                        isolate)));
-  __ ldr(r0, MemOperand(ip));
   __ str(r3, MemOperand(ip));
 
   // Special handling of termination exceptions which are uncatchable
   // by javascript code.
   __ cmp(r0, Operand(isolate->factory()->termination_exception()));
   __ b(eq, throw_termination_exception);
 
   // Handle normal exception.
   __ jmp(throw_normal_exception);
 
@@ skipping 3968 matching lines @@
 
   __ Pop(lr, r5, r1);
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM