diff options
Diffstat (limited to 'src/3rdparty/v8/src/ia32/debug-ia32.cc')
| -rw-r--r-- | src/3rdparty/v8/src/ia32/debug-ia32.cc | 362 |
1 files changed, 0 insertions, 362 deletions
diff --git a/src/3rdparty/v8/src/ia32/debug-ia32.cc b/src/3rdparty/v8/src/ia32/debug-ia32.cc deleted file mode 100644 index d153e18..0000000 --- a/src/3rdparty/v8/src/ia32/debug-ia32.cc +++ /dev/null @@ -1,362 +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_IA32) - -#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-ia32.cc -// for the precise return instructions sequence. -void BreakLocationIterator::SetDebugBreakAtReturn() { - ASSERT(Assembler::kJSReturnSequenceLength >= - Assembler::kCallInstructionLength); - Isolate* isolate = Isolate::Current(); - rinfo()->PatchCodeWithCall(isolate->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(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 rinfo()->IsPatchedDebugBreakSlotSequence(); -} - - -void BreakLocationIterator::SetDebugBreakAtSlot() { - ASSERT(IsDebugBreakSlot()); - Isolate* isolate = Isolate::Current(); - rinfo()->PatchCodeWithCall( - isolate->debug()->debug_break_slot()->entry(), - Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); -} - - -void BreakLocationIterator::ClearDebugBreakAtSlot() { - ASSERT(IsDebugBreakSlot()); - rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); -} - -// All debug break stubs support padding for LiveEdit. -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(Immediate(Smi::FromInt( - Debug::FramePaddingLayout::kPaddingValue))); - } - __ push(Immediate(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 a smi 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 }; - if ((object_regs & (1 << r)) != 0) { - __ push(reg); - } - if ((non_object_regs & (1 << r)) != 0) { - if (FLAG_debug_code) { - __ test(reg, Immediate(0xc0000000)); - __ Assert(zero, "Unable to encode value as smi"); - } - __ SmiTag(reg); - __ push(reg); - } - } - -#ifdef DEBUG - __ RecordComment("// Calling from debug break to runtime - come in - over"); -#endif - __ Set(eax, Immediate(0)); // No arguments. - __ mov(ebx, Immediate(ExternalReference::debug_break(masm->isolate()))); - - CEntryStub ceb(1); - __ CallStub(&ceb); - - // Automatically find register that could be used after register restore. - // We need one register for padding skip instructions. - Register unused_reg = { -1 }; - - // Restore the register values containing object pointers from the - // expression stack. - for (int i = kNumJSCallerSaved; --i >= 0;) { - int r = JSCallerSavedCode(i); - Register reg = { r }; - if (FLAG_debug_code) { - __ Set(reg, Immediate(kDebugZapValue)); - } - bool taken = reg.code() == esi.code(); - if ((object_regs & (1 << r)) != 0) { - __ pop(reg); - taken = true; - } - if ((non_object_regs & (1 << r)) != 0) { - __ pop(reg); - __ SmiUntag(reg); - taken = true; - } - if (!taken) { - unused_reg = reg; - } - } - - ASSERT(unused_reg.code() != -1); - - // Read current padding counter and skip corresponding number of words. - __ pop(unused_reg); - // We divide stored value by 2 (untagging) and multiply it by word's size. - STATIC_ASSERT(kSmiTagSize == 1 && kSmiShiftSize == 0); - __ lea(esp, Operand(esp, unused_reg, times_half_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) { - __ add(esp, 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()); - __ jmp(Operand::StaticVariable(after_break_target)); -} - - -void Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) { - // Register state for IC load call (from ic-ia32.cc). - // ----------- S t a t e ------------- - // -- ecx : name - // -- edx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, ecx.bit() | edx.bit(), 0, false); -} - - -void Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) { - // Register state for IC store call (from ic-ia32.cc). - // ----------- S t a t e ------------- - // -- eax : value - // -- ecx : name - // -- edx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper( - masm, eax.bit() | ecx.bit() | edx.bit(), 0, false); -} - - -void Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) { - // Register state for keyed IC load call (from ic-ia32.cc). - // ----------- S t a t e ------------- - // -- ecx : key - // -- edx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, ecx.bit() | edx.bit(), 0, false); -} - - -void Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) { - // Register state for keyed IC load call (from ic-ia32.cc). - // ----------- S t a t e ------------- - // -- eax : value - // -- ecx : key - // -- edx : receiver - // ----------------------------------- - Generate_DebugBreakCallHelper( - masm, eax.bit() | ecx.bit() | edx.bit(), 0, false); -} - - -void Debug::GenerateCallICDebugBreak(MacroAssembler* masm) { - // Register state for keyed IC call call (from ic-ia32.cc) - // ----------- S t a t e ------------- - // -- ecx: name - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, ecx.bit(), 0, false); -} - - -void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) { - // Register state just before return from JS function (from codegen-ia32.cc). - // ----------- S t a t e ------------- - // -- eax: return value - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, eax.bit(), 0, true); -} - - -void Debug::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) { - // Register state for CallFunctionStub (from code-stubs-ia32.cc). - // ----------- S t a t e ------------- - // -- edi: function - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, edi.bit(), 0, false); -} - - -void Debug::GenerateCallFunctionStubRecordDebugBreak(MacroAssembler* masm) { - // Register state for CallFunctionStub (from code-stubs-ia32.cc). - // ----------- S t a t e ------------- - // -- ebx: cache cell for call target - // -- edi: function - // ----------------------------------- - Generate_DebugBreakCallHelper(masm, ebx.bit() | edi.bit(), 0, false); -} - - -void Debug::GenerateCallConstructStubDebugBreak(MacroAssembler* masm) { - // Register state for CallConstructStub (from code-stubs-ia32.cc). - // eax is the actual number of arguments not encoded as a smi see comment - // above IC call. - // ----------- S t a t e ------------- - // -- eax: number of arguments (not smi) - // -- edi: constructor function - // ----------------------------------- - // The number of arguments in eax is not smi encoded. - Generate_DebugBreakCallHelper(masm, edi.bit(), eax.bit(), false); -} - - -void Debug::GenerateCallConstructStubRecordDebugBreak(MacroAssembler* masm) { - // Register state for CallConstructStub (from code-stubs-ia32.cc). - // eax is the actual number of arguments not encoded as a smi see comment - // above IC call. - // ----------- S t a t e ------------- - // -- eax: number of arguments (not smi) - // -- ebx: cache cell for call target - // -- edi: constructor function - // ----------------------------------- - // The number of arguments in eax is not smi encoded. - Generate_DebugBreakCallHelper(masm, ebx.bit() | edi.bit(), eax.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()); - __ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0)); - - // We do not know our frame height, but set esp based on ebp. - __ lea(esp, Operand(ebp, -1 * kPointerSize)); - - __ pop(edi); // Function. - __ pop(ebp); - - // Load context from the function. - __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); - - // Get function code. - __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); - __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); - __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); - - // Re-run JSFunction, edi is function, esi is context. - __ jmp(edx); -} - -const bool Debug::kFrameDropperSupported = true; - -#undef __ - -#endif // ENABLE_DEBUGGER_SUPPORT - -} } // namespace v8::internal - -#endif // V8_TARGET_ARCH_IA32 |