Delegate throwing in RegExpExecStub to CEntryStub.

src/arm/code-stubs-arm.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 920 matching lines @@
   isolate->set_fp_stubs_generated(true);
 }
 
 
 void CEntryStub::GenerateAheadOfTime(Isolate* isolate) {
   CEntryStub stub(isolate, 1, kDontSaveFPRegs);
   stub.GetCode();
 }
 
 
-static void ThrowPendingException(MacroAssembler* masm) {
-  Isolate* isolate = masm->isolate();
-
-  ExternalReference pending_handler_context_address(
-      Isolate::kPendingHandlerContextAddress, isolate);
-  ExternalReference pending_handler_code_address(
-      Isolate::kPendingHandlerCodeAddress, isolate);
-  ExternalReference pending_handler_offset_address(
-      Isolate::kPendingHandlerOffsetAddress, isolate);
-  ExternalReference pending_handler_fp_address(
-      Isolate::kPendingHandlerFPAddress, isolate);
-  ExternalReference pending_handler_sp_address(
-      Isolate::kPendingHandlerSPAddress, isolate);
-
-  // Ask the runtime for help to determine the handler. This will set r0 to
-  // contain the current pending exception, don't clobber it.
-  ExternalReference find_handler(Runtime::kFindExceptionHandler, isolate);
-  {
-    FrameScope scope(masm, StackFrame::MANUAL);
-    __ PrepareCallCFunction(3, 0, r0);
-    __ mov(r0, Operand(0));
-    __ mov(r1, Operand(0));
-    __ mov(r2, Operand(ExternalReference::isolate_address(isolate)));
-    __ CallCFunction(find_handler, 3);
-  }
-
-  // Retrieve the handler context, SP and FP.
-  __ mov(cp, Operand(pending_handler_context_address));
-  __ ldr(cp, MemOperand(cp));
-  __ mov(sp, Operand(pending_handler_sp_address));
-  __ ldr(sp, MemOperand(sp));
-  __ mov(fp, Operand(pending_handler_fp_address));
-  __ ldr(fp, MemOperand(fp));
-
-  // If the handler is a JS frame, restore the context to the frame.
-  // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp
-  // or cp.
-  __ cmp(cp, Operand(0));
-  __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne);
-
-  // Compute the handler entry address and jump to it.
-  ConstantPoolUnavailableScope constant_pool_unavailable(masm);
-  __ mov(r1, Operand(pending_handler_code_address));
-  __ ldr(r1, MemOperand(r1));
-  __ mov(r2, Operand(pending_handler_offset_address));
-  __ ldr(r2, MemOperand(r2));
-  if (FLAG_enable_ool_constant_pool) {
-    __ ldr(pp, FieldMemOperand(r1, Code::kConstantPoolOffset));
-  }
-  __ add(r1, r1, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ add(pc, r1, r2);
-}
-
-
 void CEntryStub::Generate(MacroAssembler* masm) {
   // Called from JavaScript; parameters are on stack as if calling JS function.
   // r0: number of arguments including receiver
   // r1: pointer to builtin function
   // fp: frame pointer  (restored after C call)
   // sp: stack pointer  (restored as callee's sp after C call)
   // cp: current context  (C callee-saved)
 
   ProfileEntryHookStub::MaybeCallEntryHook(masm);
 
@@ skipping 86 matching lines @@
   // Exit C frame and return.
   // r0:r1: result
   // sp: stack pointer
   // fp: frame pointer
   // Callee-saved register r4 still holds argc.
   __ LeaveExitFrame(save_doubles(), r4, true);
   __ mov(pc, lr);
 
   // Handling of exception.
   __ bind(&exception_returned);
-  ThrowPendingException(masm);
+
+  ExternalReference pending_handler_context_address(
+      Isolate::kPendingHandlerContextAddress, isolate());
+  ExternalReference pending_handler_code_address(
+      Isolate::kPendingHandlerCodeAddress, isolate());
+  ExternalReference pending_handler_offset_address(
+      Isolate::kPendingHandlerOffsetAddress, isolate());
+  ExternalReference pending_handler_fp_address(
+      Isolate::kPendingHandlerFPAddress, isolate());
+  ExternalReference pending_handler_sp_address(
+      Isolate::kPendingHandlerSPAddress, isolate());
+
+  // Ask the runtime for help to determine the handler. This will set r0 to
+  // contain the current pending exception, don't clobber it.
+  ExternalReference find_handler(Runtime::kFindExceptionHandler, isolate());
+  {
+    FrameScope scope(masm, StackFrame::MANUAL);
+    __ PrepareCallCFunction(3, 0, r0);
+    __ mov(r0, Operand(0));
+    __ mov(r1, Operand(0));
+    __ mov(r2, Operand(ExternalReference::isolate_address(isolate())));
+    __ CallCFunction(find_handler, 3);
+  }
+
+  // Retrieve the handler context, SP and FP.
+  __ mov(cp, Operand(pending_handler_context_address));
+  __ ldr(cp, MemOperand(cp));
+  __ mov(sp, Operand(pending_handler_sp_address));
+  __ ldr(sp, MemOperand(sp));
+  __ mov(fp, Operand(pending_handler_fp_address));
+  __ ldr(fp, MemOperand(fp));
+
+  // If the handler is a JS frame, restore the context to the frame.
+  // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp
+  // or cp.
+  __ cmp(cp, Operand(0));
+  __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne);
+
+  // Compute the handler entry address and jump to it.
+  ConstantPoolUnavailableScope constant_pool_unavailable(masm);
+  __ mov(r1, Operand(pending_handler_code_address));
+  __ ldr(r1, MemOperand(r1));
+  __ mov(r2, Operand(pending_handler_offset_address));
+  __ ldr(r2, MemOperand(r2));
+  if (FLAG_enable_ool_constant_pool) {
+    __ ldr(pp, FieldMemOperand(r1, Code::kConstantPoolOffset));
+  }
+  __ add(r1, r1, Operand(Code::kHeaderSize - kHeapObjectTag));
+  __ add(pc, r1, r2);
 }
 
 
 void JSEntryStub::Generate(MacroAssembler* masm) {
   // r0: code entry
   // r1: function
   // r2: receiver
   // r3: argc
   // [sp+0]: argv
 
@@ skipping 1117 matching lines @@
   // haven't created the exception yet. Handle that in the runtime system.
   // TODO(592): Rerunning the RegExp to get the stack overflow exception.
   __ mov(r1, Operand(isolate()->factory()->the_hole_value()));
   __ mov(r2, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                        isolate())));
   __ ldr(r0, MemOperand(r2, 0));
   __ cmp(r0, r1);
   __ b(eq, &runtime);
 
   // For exception, throw the exception again.
-  __ EnterExitFrame(false);
-  ThrowPendingException(masm);
+  __ TailCallRuntime(Runtime::kRegExpExecReThrow, 4, 1);
 
   __ bind(&failure);
   // For failure and exception return null.
   __ mov(r0, Operand(isolate()->factory()->null_value()));
   __ add(sp, sp, Operand(4 * kPointerSize));
   __ Ret();
 
   // Process the result from the native regexp code.
   __ bind(&success);
   __ ldr(r1,
@@ skipping 3033 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM