Adds an API for setting the stack limit per-thread.

src/arm/simulator-arm.h

 // Copyright 2009 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 24 matching lines @@
 
 #ifndef V8_ARM_SIMULATOR_ARM_H_
 #define V8_ARM_SIMULATOR_ARM_H_
 
 #if defined(__arm__)
 
 // When running without a simulator we call the entry directly.
 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
   (entry(p0, p1, p2, p3, p4))
 
-// Calculated the stack limit beyond which we will throw stack overflow errors.
-// This macro must be called from a C++ method. It relies on being able to take
-// the address of "this" to get a value on the current execution stack and then
-// calculates the stack limit based on that value.
-#define GENERATED_CODE_STACK_LIMIT(limit) \
-  (reinterpret_cast<uintptr_t>(this) - limit)
+// The stack limit beyond which we will throw stack overflow errors in
+// generated code. Because generated code on arm uses the C stack, we
+// just use the C stack limit.
+#define GENERATED_CODE_STACK_LIMIT(c_limit) \
+  (c_limit)
 
 
 // Call the generated regexp code directly. The entry function pointer should
 // expect seven int/pointer sized arguments and return an int.
 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
   entry(p0, p1, p2, p3, p4, p5, p6)
 
 #else  // defined(__arm__)
 
 // When running with the simulator transition into simulated execution at this
 // point.
 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
   reinterpret_cast<Object*>( \
       assembler::arm::Simulator::current()->Call(FUNCTION_ADDR(entry), 5, \
                                                  p0, p1, p2, p3, p4))
 
 // The simulator has its own stack. Thus it has a different stack limit from
 // the C-based native code.
-#define GENERATED_CODE_STACK_LIMIT(limit) \
+#define GENERATED_CODE_STACK_LIMIT(c_limit) \
   (assembler::arm::Simulator::current()->StackLimit())
 
 
 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
   assembler::arm::Simulator::current()->Call( \
     FUNCTION_ADDR(entry), 7, p0, p1, p2, p3, p4, p5, p6)
 
 #include "constants-arm.h"
 
 
@@ skipping 135 matching lines @@
   // registered breakpoints
   Instr* break_pc_;
   instr_t break_instr_;
 };
 
 } }  // namespace assembler::arm
 
 #endif  // defined(__arm__)
 
 #endif  // V8_ARM_SIMULATOR_ARM_H_