Switch full-codegen from StackHandlers to handler table.

src/arm64/code-stubs-arm64.cc

 // 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 1208 matching lines @@
   __ SetStackPointer(jssp);
 
   // Retrieve the handler context, SP and FP.
   __ Mov(cp, Operand(pending_handler_context_address));
   __ Ldr(cp, MemOperand(cp));
   __ Mov(jssp, Operand(pending_handler_sp_address));
   __ Ldr(jssp, MemOperand(jssp));
   __ 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.
+  // If the handler is a JS frame, restore the context to the frame. Note that
+  // the context will be set to (cp == 0) for non-JS frames.
   Label not_js_frame;
   __ Cbz(cp, &not_js_frame);
   __ Str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   __ Bind(&not_js_frame);
 
   // Compute the handler entry address and jump to it.
   __ Mov(x10, Operand(pending_handler_code_address));
   __ Ldr(x10, MemOperand(x10));
   __ Mov(x11, Operand(pending_handler_offset_address));
   __ Ldr(x11, MemOperand(x11));
@@ skipping 97 matching lines @@
     // field in the JSEnv and return a failure sentinel. Coming in here the
     // fp will be invalid because the PushTryHandler below sets it to 0 to
     // signal the existence of the JSEntry frame.
     __ Mov(x10, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                           isolate())));
   }
   __ Str(code_entry, MemOperand(x10));
   __ LoadRoot(x0, Heap::kExceptionRootIndex);
   __ B(&exit);
 
-  // Invoke: Link this frame into the handler chain.  There's only one
-  // handler block in this code object, so its index is 0.
+  // Invoke: Link this frame into the handler chain.
   __ Bind(&invoke);
-  __ PushTryHandler(StackHandler::JS_ENTRY, 0);
+  __ PushStackHandler();
   // If an exception not caught by another handler occurs, this handler
   // returns control to the code after the B(&invoke) above, which
   // restores all callee-saved registers (including cp and fp) to their
   // saved values before returning a failure to C.
 
   // Clear any pending exceptions.
   __ Mov(x10, Operand(isolate()->factory()->the_hole_value()));
   __ Mov(x11, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                         isolate())));
   __ Str(x10, MemOperand(x11));
@@ skipping 13 matching lines @@
                               : Builtins::kJSEntryTrampoline,
                           isolate());
   __ Mov(x10, entry);
 
   // Call the JSEntryTrampoline.
   __ Ldr(x11, MemOperand(x10));  // Dereference the address.
   __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag);
   __ Blr(x12);
 
   // Unlink this frame from the handler chain.
-  __ PopTryHandler();
+  __ PopStackHandler();
 
 
   __ Bind(&exit);
   // x0 holds the result.
   // The stack pointer points to the top of the entry frame pushed on entry from
   // C++ (at the beginning of this stub):
   // jssp[0] : JS entry frame marker.
   // jssp[1] : C entry FP.
   // jssp[2] : stack frame marker.
   // jssp[3] : stack frmae marker.
@@ skipping 4348 matching lines @@
                            kStackUnwindSpace, NULL, spill_offset,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64