2008-12-09 11:12:14 +00:00
|
|
|
// Copyright 2006-2008 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
|
|
|
|
// with the distribution.
|
|
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
|
|
// contributors may be used to endorse or promote products derived
|
|
|
|
// from this software without specific prior written permission.
|
|
|
|
//
|
|
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
|
|
|
#include "v8.h"
|
|
|
|
|
|
|
|
#include "codegen-inl.h"
|
|
|
|
#include "debug.h"
|
|
|
|
|
2009-05-25 10:05:56 +00:00
|
|
|
namespace v8 {
|
|
|
|
namespace internal {
|
2008-12-09 11:12:14 +00:00
|
|
|
|
2009-04-20 16:36:13 +00:00
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
2009-02-09 12:17:39 +00:00
|
|
|
bool BreakLocationIterator::IsDebugBreakAtReturn() {
|
2009-09-14 06:57:24 +00:00
|
|
|
return Debug::IsDebugBreakAtReturn(rinfo());
|
2009-02-09 12:17:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void BreakLocationIterator::SetDebugBreakAtReturn() {
|
2009-09-14 06:57:24 +00:00
|
|
|
// Patch the code changing the return from JS function sequence from
|
|
|
|
// mov sp, fp
|
|
|
|
// ldmia sp!, {fp, lr}
|
|
|
|
// add sp, sp, #4
|
|
|
|
// bx lr
|
|
|
|
// to a call to the debug break return code.
|
2010-03-19 14:05:11 +00:00
|
|
|
// #if USE_BLX
|
|
|
|
// ldr ip, [pc, #0]
|
|
|
|
// blx ip
|
|
|
|
// #else
|
2009-09-14 06:57:24 +00:00
|
|
|
// mov lr, pc
|
|
|
|
// ldr pc, [pc, #-4]
|
2010-03-19 14:05:11 +00:00
|
|
|
// #endif
|
2009-09-14 06:57:24 +00:00
|
|
|
// <debug break return code entry point address>
|
|
|
|
// bktp 0
|
|
|
|
CodePatcher patcher(rinfo()->pc(), 4);
|
2010-03-19 14:05:11 +00:00
|
|
|
#ifdef USE_BLX
|
|
|
|
patcher.masm()->ldr(v8::internal::ip, MemOperand(v8::internal::pc, 0));
|
|
|
|
patcher.masm()->blx(v8::internal::ip);
|
|
|
|
#else
|
2009-09-14 06:57:24 +00:00
|
|
|
patcher.masm()->mov(v8::internal::lr, v8::internal::pc);
|
|
|
|
patcher.masm()->ldr(v8::internal::pc, MemOperand(v8::internal::pc, -4));
|
2010-03-19 14:05:11 +00:00
|
|
|
#endif
|
2009-09-14 06:57:24 +00:00
|
|
|
patcher.Emit(Debug::debug_break_return()->entry());
|
|
|
|
patcher.masm()->bkpt(0);
|
2009-02-09 12:17:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-09-14 06:57:24 +00:00
|
|
|
// Restore the JS frame exit code.
|
2009-02-09 12:17:39 +00:00
|
|
|
void BreakLocationIterator::ClearDebugBreakAtReturn() {
|
2009-09-14 06:57:24 +00:00
|
|
|
rinfo()->PatchCode(original_rinfo()->pc(),
|
2009-11-30 15:09:49 +00:00
|
|
|
Assembler::kJSReturnSequenceLength);
|
2009-02-09 12:17:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-09-14 06:57:24 +00:00
|
|
|
// A debug break in the exit code is identified by a call.
|
2009-02-13 12:36:58 +00:00
|
|
|
bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) {
|
|
|
|
ASSERT(RelocInfo::IsJSReturn(rinfo->rmode()));
|
2009-10-15 11:52:53 +00:00
|
|
|
return rinfo->IsPatchedReturnSequence();
|
2009-02-13 12:36:58 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-04-21 13:42:12 +00:00
|
|
|
#define __ ACCESS_MASM(masm)
|
2008-12-09 11:12:14 +00:00
|
|
|
|
|
|
|
|
|
|
|
static void Generate_DebugBreakCallHelper(MacroAssembler* masm,
|
|
|
|
RegList pointer_regs) {
|
|
|
|
// Save the content of all general purpose registers in memory. This copy in
|
|
|
|
// memory is later pushed onto the JS expression stack for the fake JS frame
|
|
|
|
// generated and also to the C frame generated on top of that. In the JS
|
|
|
|
// frame ONLY the registers containing pointers will be pushed on the
|
|
|
|
// expression stack. This causes the GC to update these pointers so that
|
|
|
|
// they will have the correct value when returning from the debugger.
|
|
|
|
__ SaveRegistersToMemory(kJSCallerSaved);
|
|
|
|
|
|
|
|
__ EnterInternalFrame();
|
|
|
|
|
|
|
|
// Store the registers containing object pointers on the expression stack to
|
|
|
|
// make sure that these are correctly updated during GC.
|
|
|
|
// Use sp as base to push.
|
|
|
|
__ CopyRegistersFromMemoryToStack(sp, pointer_regs);
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
__ RecordComment("// Calling from debug break to runtime - come in - over");
|
|
|
|
#endif
|
|
|
|
__ mov(r0, Operand(0)); // no arguments
|
|
|
|
__ mov(r1, Operand(ExternalReference::debug_break()));
|
|
|
|
|
2010-02-02 18:35:53 +00:00
|
|
|
CEntryStub ceb(1, ExitFrame::MODE_DEBUG);
|
2008-12-09 11:12:14 +00:00
|
|
|
__ CallStub(&ceb);
|
|
|
|
|
|
|
|
// Restore the register values containing object pointers from the expression
|
|
|
|
// stack in the reverse order as they where pushed.
|
|
|
|
// Use sp as base to pop.
|
|
|
|
__ CopyRegistersFromStackToMemory(sp, r3, pointer_regs);
|
|
|
|
|
|
|
|
__ LeaveInternalFrame();
|
|
|
|
|
|
|
|
// Finally restore all registers.
|
|
|
|
__ RestoreRegistersFromMemory(kJSCallerSaved);
|
|
|
|
|
|
|
|
// Now that the break point has been handled, resume normal execution by
|
|
|
|
// jumping to the target address intended by the caller and that was
|
|
|
|
// overwritten by the address of DebugBreakXXX.
|
|
|
|
__ mov(ip, Operand(ExternalReference(Debug_Address::AfterBreakTarget())));
|
|
|
|
__ ldr(ip, MemOperand(ip));
|
|
|
|
__ Jump(ip);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) {
|
|
|
|
// Calling convention for IC load (from ic-arm.cc).
|
|
|
|
// ----------- S t a t e -------------
|
|
|
|
// -- r0 : receiver
|
|
|
|
// -- r2 : name
|
|
|
|
// -- lr : return address
|
|
|
|
// -- [sp] : receiver
|
|
|
|
// -----------------------------------
|
2010-02-10 15:06:08 +00:00
|
|
|
// Registers r0 and r2 contain objects that need to be pushed on the
|
2008-12-09 11:12:14 +00:00
|
|
|
// expression stack of the fake JS frame.
|
|
|
|
Generate_DebugBreakCallHelper(masm, r0.bit() | r2.bit());
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) {
|
|
|
|
// Calling convention for IC store (from ic-arm.cc).
|
|
|
|
// ----------- S t a t e -------------
|
2010-02-10 15:06:08 +00:00
|
|
|
// -- r0 : value
|
|
|
|
// -- r1 : receiver
|
2008-12-09 11:12:14 +00:00
|
|
|
// -- r2 : name
|
|
|
|
// -- lr : return address
|
|
|
|
// -----------------------------------
|
2010-02-10 15:06:08 +00:00
|
|
|
// Registers r0, r1, and r2 contain objects that need to be pushed on the
|
2008-12-09 11:12:14 +00:00
|
|
|
// expression stack of the fake JS frame.
|
2010-02-10 15:06:08 +00:00
|
|
|
Generate_DebugBreakCallHelper(masm, r0.bit() | r1.bit() | r2.bit());
|
2008-12-09 11:12:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
|
2009-09-14 06:57:24 +00:00
|
|
|
// ---------- S t a t e --------------
|
|
|
|
// -- lr : return address
|
|
|
|
// -- sp[0] : key
|
|
|
|
// -- sp[4] : receiver
|
|
|
|
Generate_DebugBreakCallHelper(masm, 0);
|
2008-12-09 11:12:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
|
2009-09-14 06:57:24 +00:00
|
|
|
// ---------- S t a t e --------------
|
|
|
|
// -- lr : return address
|
|
|
|
// -- sp[0] : key
|
|
|
|
// -- sp[4] : receiver
|
|
|
|
Generate_DebugBreakCallHelper(masm, 0);
|
2008-12-09 11:12:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateCallICDebugBreak(MacroAssembler* masm) {
|
|
|
|
// Calling convention for IC call (from ic-arm.cc)
|
|
|
|
// ----------- S t a t e -------------
|
|
|
|
// -- r0: number of arguments
|
|
|
|
// -- r1: receiver
|
|
|
|
// -- lr: return address
|
|
|
|
// -----------------------------------
|
|
|
|
// Register r1 contains an object that needs to be pushed on the expression
|
|
|
|
// stack of the fake JS frame. r0 is the actual number of arguments not
|
|
|
|
// encoded as a smi, therefore it cannot be on the expression stack of the
|
|
|
|
// fake JS frame as it can easily be an invalid pointer (e.g. 1). r0 will be
|
|
|
|
// pushed on the stack of the C frame and restored from there.
|
|
|
|
Generate_DebugBreakCallHelper(masm, r1.bit());
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateConstructCallDebugBreak(MacroAssembler* masm) {
|
|
|
|
// In places other than IC call sites it is expected that r0 is TOS which
|
|
|
|
// is an object - this is not generally the case so this should be used with
|
|
|
|
// care.
|
|
|
|
Generate_DebugBreakCallHelper(masm, r0.bit());
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) {
|
|
|
|
// In places other than IC call sites it is expected that r0 is TOS which
|
|
|
|
// is an object - this is not generally the case so this should be used with
|
|
|
|
// care.
|
|
|
|
Generate_DebugBreakCallHelper(masm, r0.bit());
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Debug::GenerateStubNoRegistersDebugBreak(MacroAssembler* masm) {
|
2009-09-14 06:57:24 +00:00
|
|
|
// ----------- S t a t e -------------
|
|
|
|
// No registers used on entry.
|
|
|
|
// -----------------------------------
|
|
|
|
Generate_DebugBreakCallHelper(masm, 0);
|
2008-12-09 11:12:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2010-04-06 17:58:28 +00:00
|
|
|
void Debug::GeneratePlainReturnLiveEdit(MacroAssembler* masm) {
|
|
|
|
masm->Abort("LiveEdit frame dropping is not supported on arm");
|
|
|
|
}
|
|
|
|
|
|
|
|
void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
|
|
|
|
masm->Abort("LiveEdit frame dropping is not supported on arm");
|
|
|
|
}
|
|
|
|
|
2008-12-09 11:12:14 +00:00
|
|
|
#undef __
|
|
|
|
|
2010-04-06 17:58:28 +00:00
|
|
|
|
|
|
|
void Debug::SetUpFrameDropperFrame(StackFrame* bottom_js_frame,
|
|
|
|
Handle<Code> code) {
|
|
|
|
UNREACHABLE();
|
|
|
|
}
|
|
|
|
const int Debug::kFrameDropperFrameSize = -1;
|
|
|
|
|
2009-04-20 16:36:13 +00:00
|
|
|
#endif // ENABLE_DEBUGGER_SUPPORT
|
2008-12-09 11:12:14 +00:00
|
|
|
|
|
|
|
} } // namespace v8::internal
|