Move stack unwinding logic into the runtime.

src/arm64/macro-assembler-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 #define V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 
 #include <vector>
 
 #include "src/bailout-reason.h"
@@ skipping 1060 matching lines @@
       Register first_object_instance_type, Register second_object_instance_type,
       Register scratch1, Register scratch2, Label* failure);
 
   void JumpIfNotUniqueNameInstanceType(Register type, Label* not_unique_name);
 
   // ---- Calling / Jumping helpers ----
 
   // This is required for compatibility in architecture indepenedant code.
   inline void jmp(Label* L) { B(L); }
 
-  // Passes thrown value to the handler of top of the try handler chain.
-  // Register value must be x0.
-  void Throw(Register value,
-             Register scratch1,
-             Register scratch2,
-             Register scratch3,
-             Register scratch4);
-
-  // Propagates an uncatchable exception to the top of the current JS stack's
-  // handler chain. Register value must be x0.
-  void ThrowUncatchable(Register value,
-                        Register scratch1,
-                        Register scratch2,
-                        Register scratch3,
-                        Register scratch4);
-
   void CallStub(CodeStub* stub, TypeFeedbackId ast_id = TypeFeedbackId::None());
   void TailCallStub(CodeStub* stub);
 
   void CallRuntime(const Runtime::Function* f,
                    int num_arguments,
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs);
 
   void CallRuntime(Runtime::FunctionId id,
                    int num_arguments,
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs) {
@@ skipping 961 matching lines @@
   // Call Printf. On a native build, a simple call will be generated, but if the
   // simulator is being used then a suitable pseudo-instruction is used. The
   // arguments and stack (csp) must be prepared by the caller as for a normal
   // AAPCS64 call to 'printf'.
   //
   // The 'args' argument should point to an array of variable arguments in their
   // proper PCS registers (and in calling order). The argument registers can
   // have mixed types. The format string (x0) should not be included.
   void CallPrintf(int arg_count = 0, const CPURegister * args = NULL);
 
-  // Helper for throwing exceptions.  Compute a handler address and jump to
-  // it.  See the implementation for register usage.
-  void JumpToHandlerEntry(Register exception,
-                          Register object,
-                          Register state,
-                          Register scratch1,
-                          Register scratch2);
-
   // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace.
   void InNewSpace(Register object,
                   Condition cond,  // eq for new space, ne otherwise.
                   Label* branch);
 
   // Try to represent a double as an int so that integer fast-paths may be
   // used. Not every valid integer value is guaranteed to be caught.
   // It supports both 32-bit and 64-bit integers depending whether 'as_int'
   // is a W or X register.
   //
@@ skipping 226 matching lines @@
 #error "Unsupported option"
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 #endif  // V8_ARM64_MACRO_ASSEMBLER_ARM64_H_