diff options
Diffstat (limited to 'src/3rdparty/v8/src/x64/debug-x64.cc')
| -rw-r--r-- | src/3rdparty/v8/src/x64/debug-x64.cc | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/src/3rdparty/v8/src/x64/debug-x64.cc b/src/3rdparty/v8/src/x64/debug-x64.cc deleted file mode 100644 index 1b29e58..0000000 --- a/src/3rdparty/v8/src/x64/debug-x64.cc +++ /dev/null @@ -1,354 +0,0 @@ -// Copyright 2012 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" - -#if defined(V8_TARGET_ARCH_X64) - -#include "assembler.h" -#include "codegen.h" -#include "debug.h" - - -namespace v8 { -namespace internal { - -#ifdef ENABLE_DEBUGGER_SUPPORT - -bool BreakLocationIterator::IsDebugBreakAtReturn() { - return Debug::IsDebugBreakAtReturn(rinfo()); -} - - -// Patch the JS frame exit code with a debug break call. See -// CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-x64.cc -// for the precise return instructions sequence. -void BreakLocationIterator::SetDebugBreakAtReturn() { - ASSERT(Assembler::kJSReturnSequenceLength >= - Assembler::kCallInstructionLength); - rinfo()->PatchCodeWithCall( - Isolate::Current()->debug()->debug_break_return()->entry(), - Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); -} - - -// Restore the JS frame exit code. -void BreakLocationIterator::ClearDebugBreakAtReturn() { - rinfo()->PatchCode(original_rinfo()->pc(), - Assembler::kJSReturnSequenceLength); -} - - -// A debug break in the frame exit code is identified by the JS frame exit code -// having been patched with a call instruction. -bool Debug::IsDebugBreakAtReturn(v8::internal::RelocInfo* rinfo) { - ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); - return rinfo->IsPatchedReturnSequence(); -} - - -bool BreakLocationIterator::IsDebugBreakAtSlot() { - ASSERT(IsDebugBreakSlot()); - // Check whether the debug break slot instructions have been patched. - return !Assembler::IsNop(rinfo()->pc()); -} - - -void BreakLocationIterator::SetDebugBreakAtSlot() { - ASSERT(IsDebugBreakSlot()); - rinfo()->PatchCodeWithCall( - Isolate::Current()->debug()->debug_break_slot()->entry(), - Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); -} - - -void BreakLocationIterator::ClearDebugBreakAtSlot() { - ASSERT(IsDebugBreakSlot()); - rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); -} - -const bool Debug::FramePaddingLayout::kIsSupported = true; - - -#define __ ACCESS_MASM(masm) - - -static void Generate_DebugBreakCallHelper(MacroAssembler* masm, - RegList object_regs, - RegList non_object_regs, - bool convert_call_to_jmp) { - // Enter an internal frame. - { - FrameScope scope(masm, StackFrame::INTERNAL); - - // Load padding words on stack. - for (int i = 0; i < Debug::FramePaddingLayout::kInitialSize; i++) { - __ Push(Smi::FromInt(Debug::FramePaddingLayout::kPaddingValue)); - } - __ Push(Smi::FromInt(Debug::FramePaddingLayout::kInitialSize)); - - // Store the registers containing live values on the expression stack to - // make sure that these are correctly updated during GC. Non object values - // are stored as as two smis causing it to be untouched by GC. - ASSERT((object_regs & ~kJSCallerSaved) == 0); - ASSERT((non_object_regs & ~kJSCallerSaved) == 0); - ASSERT((object_regs & non_object_regs) == 0); - for (int i = 0; i < kNumJSCallerSaved; i++) { - int r = JSCallerSavedCode(i); - Register reg = { r }; - ASSERT(!reg.is(kScratchRegister)); - if ((object_regs & (1 << r)) != 0) { - __ push(reg); - } - // Store the 64-bit value as two smis. - if ((non_object_regs & (1 << r)) != 0) { - __ movq(kScratchRegister, reg); - __ Integer32ToSmi(reg, reg); - __ push(reg); - __ sar(kScratchRegister, Immediate(32)); - __ Integer32ToSmi(kScratchRegister, kScratchRegister); - __ push(kScratchRegister); - } - } - -#ifdef DEBUG - __ RecordComment("// Calling from debug break to runtime - come in - over"); -#endif - __ Set(rax, 0); // No arguments (argc == 0). - __ movq(rbx, ExternalReference::debug_break(masm->isolate())); - - CEntryStub ceb(1); - __ CallStub(&ceb); - - // Restore the register values from the expression stack. - for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { - int r = JSCallerSavedCode(i); - Register reg = { r }; - if (FLAG_debug_code) { - __ Set(reg, kDebugZapValue); - } - if ((object_regs & (1 << r)) != 0) { - __ pop(reg); - } - // Reconstruct the 64-bit value from two smis. - if ((non_object_regs & (1 << r)) != 0) { - __ pop(kScratchRegister); - __ SmiToInteger32(kScratchRegister, kScratchRegister); - __ shl(kScratchRegister, Immediate(32)); - __ pop(reg); - __ SmiToInteger32(reg, reg); - __ or_(reg, kScratchRegister); - } - } - - // Read current padding counter and skip corresponding number of words. - __ pop(kScratchRegister); - __ SmiToInteger32(kScratchRegister, kScratchRegister); - __ lea(rsp, Operand(rsp, kScratchRegister, times_pointer_size, 0)); - - // Get rid of the internal frame. - } - - // If this call did not replace a call but patched other code then there will - // be an unwanted return address left on the stack. Here we get rid of that. - if (convert_call_to_jmp) { - __ addq(rsp, Immediate(kPointerSize)); - } - - // 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. - ExternalReference after_break_target = - ExternalReference(Debug_Address::AfterBreakTarget(), masm->isolate()); - __ movq(kScratchRegister, after_break_target); - __ jmp(Operand(kScratchRegister, 0)); -} - - -void Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) { - // Register state for IC load call (from ic-x64.cc). - // ----------- S t a t e ------------- - // -- rax : receiver - // -- rcx : name - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, rax.bit() | rcx.bit(), 0, false); -} - - -void Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) { - // Register state for IC store call (from ic-x64.cc). - // ----------- S t a t e ------------- - // -- rax : value - // -- rcx : name - // -- rdx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper( - masm, rax.bit() | rcx.bit() | rdx.bit(), 0, false); -} - - -void Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) { - // Register state for keyed IC load call (from ic-x64.cc). - // ----------- S t a t e ------------- - // -- rax : key - // -- rdx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, rax.bit() | rdx.bit(), 0, false); -} - - -void Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) { - // Register state for keyed IC load call (from ic-x64.cc). - // ----------- S t a t e ------------- - // -- rax : value - // -- rcx : key - // -- rdx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper( - masm, rax.bit() | rcx.bit() | rdx.bit(), 0, false); -} - - -void Debug::GenerateCallICDebugBreak(MacroAssembler* masm) { - // Register state for IC call call (from ic-x64.cc) - // ----------- S t a t e ------------- - // -- rcx: function name - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, rcx.bit(), 0, false); -} - - -void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) { - // Register state just before return from JS function (from codegen-x64.cc). - // ----------- S t a t e ------------- - // -- rax: return value - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, rax.bit(), 0, true); -} - - -void Debug::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) { - // Register state for CallFunctionStub (from code-stubs-x64.cc). - // ----------- S t a t e ------------- - // -- rdi : function - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, rdi.bit(), 0, false); -} - - -void Debug::GenerateCallFunctionStubRecordDebugBreak(MacroAssembler* masm) { - // Register state for CallFunctionStub (from code-stubs-x64.cc). - // ----------- S t a t e ------------- - // -- rdi : function - // -- rbx: cache cell for call target - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, rbx.bit() | rdi.bit(), 0, false); -} - - -void Debug::GenerateCallConstructStubDebugBreak(MacroAssembler* masm) { - // Register state for CallConstructStub (from code-stubs-x64.cc). - // rax is the actual number of arguments not encoded as a smi, see comment - // above IC call. - // ----------- S t a t e ------------- - // -- rax: number of arguments - // ----------------------------------- - // The number of arguments in rax is not smi encoded. - Generate_DebugBreakCallHelper(masm, rdi.bit(), rax.bit(), false); -} - - -void Debug::GenerateCallConstructStubRecordDebugBreak(MacroAssembler* masm) { - // Register state for CallConstructStub (from code-stubs-x64.cc). - // rax is the actual number of arguments not encoded as a smi, see comment - // above IC call. - // ----------- S t a t e ------------- - // -- rax: number of arguments - // -- rbx: cache cell for call target - // ----------------------------------- - // The number of arguments in rax is not smi encoded. - Generate_DebugBreakCallHelper(masm, rbx.bit() | rdi.bit(), rax.bit(), false); -} - - -void Debug::GenerateSlot(MacroAssembler* masm) { - // Generate enough nop's to make space for a call instruction. - Label check_codesize; - __ bind(&check_codesize); - __ RecordDebugBreakSlot(); - __ Nop(Assembler::kDebugBreakSlotLength); - ASSERT_EQ(Assembler::kDebugBreakSlotLength, - masm->SizeOfCodeGeneratedSince(&check_codesize)); -} - - -void Debug::GenerateSlotDebugBreak(MacroAssembler* masm) { - // In the places where a debug break slot is inserted no registers can contain - // object pointers. - Generate_DebugBreakCallHelper(masm, 0, 0, true); -} - - -void Debug::GeneratePlainReturnLiveEdit(MacroAssembler* masm) { - masm->ret(0); -} - - -void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { - ExternalReference restarter_frame_function_slot = - ExternalReference(Debug_Address::RestarterFrameFunctionPointer(), - masm->isolate()); - __ movq(rax, restarter_frame_function_slot); - __ movq(Operand(rax, 0), Immediate(0)); - - // We do not know our frame height, but set rsp based on rbp. - __ lea(rsp, Operand(rbp, -1 * kPointerSize)); - - __ pop(rdi); // Function. - __ pop(rbp); - - // Load context from the function. - __ movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); - - // Get function code. - __ movq(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); - __ movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); - __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); - - // Re-run JSFunction, rdi is function, rsi is context. - __ jmp(rdx); -} - -const bool Debug::kFrameDropperSupported = true; - -#undef __ - -#endif // ENABLE_DEBUGGER_SUPPORT - -} } // namespace v8::internal - -#endif // V8_TARGET_ARCH_X64 |