Pass new pool pointer to the JumpToException stub instead of reloading in through the frame's Code …

runtime/vm/stub_code_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 1823 matching lines @@
 
 
 // Jump to the exception or error handler.
 // TOS + 0: return address
 // Arg1: program counter
 // Arg2: stack pointer
 // Arg3: frame_pointer
 // Arg4: exception object
 // Arg5: stacktrace object
 // Arg6: thread
+// Arg7: pool pointer
 // No Result.
 void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
   ASSERT(kExceptionObjectReg == RAX);
   ASSERT(kStackTraceObjectReg == RDX);
   ASSERT(CallingConventions::kArg4Reg != kStackTraceObjectReg);
   ASSERT(CallingConventions::kArg1Reg != kStackTraceObjectReg);
 
 #if defined(_WIN64)
   Register stacktrace_reg = RBX;
   __ movq(stacktrace_reg, Address(RSP, 5 * kWordSize));
   __ movq(THR, Address(RSP, 6 * kWordSize));
+  __ movq(PP, Address(RSP, 7 * kWordSize));
 #else
   Register stacktrace_reg = CallingConventions::kArg5Reg;
   __ movq(THR, CallingConventions::kArg6Reg);
+  __ movq(PP, Address(RSP, 1 * kWordSize));
 #endif
   __ movq(RBP, CallingConventions::kArg3Reg);
   __ movq(RSP, CallingConventions::kArg2Reg);
   __ movq(kStackTraceObjectReg, stacktrace_reg);
   __ movq(kExceptionObjectReg, CallingConventions::kArg4Reg);
   // Set the tag.
   __ movq(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
   // Clear top exit frame.
   __ movq(Address(THR, Thread::top_exit_frame_info_offset()),
           Immediate(0));
-  // Restore the pool pointer.
-  __ RestoreCodePointer();
-  __ LoadPoolPointer(PP);
   __ jmp(CallingConventions::kArg1Reg);  // Jump to the exception handler code.
 }
 
 
 // Calls to the runtime to optimize the given function.
 // RDI: function to be reoptimized.
 // R10: argument descriptor (preserved).
 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(R10);  // Preserve args descriptor.
@@ skipping 364 matching lines @@
 }
 
 
 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
   __ int3();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64