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-rw-r--r--deps/v8/src/x87/debug-x87.cc282
1 files changed, 0 insertions, 282 deletions
diff --git a/deps/v8/src/x87/debug-x87.cc b/deps/v8/src/x87/debug-x87.cc
deleted file mode 100644
index d0fcc82eaa..0000000000
--- a/deps/v8/src/x87/debug-x87.cc
+++ /dev/null
@@ -1,282 +0,0 @@
-// 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_X87
-
-#include "src/codegen.h"
-#include "src/debug.h"
-
-
-namespace v8 {
-namespace internal {
-
-// Patch the code at the current PC with a call to the target address.
-// Additional guard int3 instructions can be added if required.
-void PatchCodeWithCall(Address pc, Address target, int guard_bytes) {
- // Call instruction takes up 5 bytes and int3 takes up one byte.
- static const int kCallCodeSize = 5;
- int code_size = kCallCodeSize + guard_bytes;
-
- // Create a code patcher.
- CodePatcher patcher(pc, code_size);
-
-// Add a label for checking the size of the code used for returning.
-#ifdef DEBUG
- Label check_codesize;
- patcher.masm()->bind(&check_codesize);
-#endif
-
- // Patch the code.
- patcher.masm()->call(target, RelocInfo::NONE32);
-
- // Check that the size of the code generated is as expected.
- DCHECK_EQ(kCallCodeSize,
- patcher.masm()->SizeOfCodeGeneratedSince(&check_codesize));
-
- // Add the requested number of int3 instructions after the call.
- DCHECK_GE(guard_bytes, 0);
- for (int i = 0; i < guard_bytes; i++) {
- patcher.masm()->int3();
- }
-
- CpuFeatures::FlushICache(pc, code_size);
-}
-
-
-// Patch the JS frame exit code with a debug break call. See
-// CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-x87.cc
-// for the precise return instructions sequence.
-void BreakLocation::SetDebugBreakAtReturn() {
- DCHECK(Assembler::kJSReturnSequenceLength >=
- Assembler::kCallInstructionLength);
- PatchCodeWithCall(
- pc(), debug_info_->GetIsolate()->builtins()->Return_DebugBreak()->entry(),
- Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength);
-}
-
-
-void BreakLocation::SetDebugBreakAtSlot() {
- DCHECK(IsDebugBreakSlot());
- Isolate* isolate = debug_info_->GetIsolate();
- PatchCodeWithCall(
- pc(), isolate->builtins()->Slot_DebugBreak()->entry(),
- Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength);
-}
-
-
-#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 < LiveEdit::kFramePaddingInitialSize; i++) {
- __ push(Immediate(Smi::FromInt(LiveEdit::kFramePaddingValue)));
- }
- __ push(Immediate(Smi::FromInt(LiveEdit::kFramePaddingInitialSize)));
-
- // 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.
- DCHECK((object_regs & ~kJSCallerSaved) == 0);
- DCHECK((non_object_regs & ~kJSCallerSaved) == 0);
- DCHECK((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, kUnableToEncodeValueAsSmi);
- }
- __ SmiTag(reg);
- __ push(reg);
- }
- }
-
-#ifdef DEBUG
- __ RecordComment("// Calling from debug break to runtime - come in - over");
-#endif
- __ Move(eax, Immediate(0)); // No arguments.
- __ mov(ebx, Immediate(ExternalReference::debug_break(masm->isolate())));
-
- CEntryStub ceb(masm->isolate(), 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) {
- __ Move(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;
- }
- }
-
- DCHECK(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_after_break_target_address(masm->isolate());
- __ jmp(Operand::StaticVariable(after_break_target));
-}
-
-
-void DebugCodegen::GenerateCallICStubDebugBreak(MacroAssembler* masm) {
- // Register state for CallICStub
- // ----------- S t a t e -------------
- // -- edx : type feedback slot (smi)
- // -- edi : function
- // -----------------------------------
- Generate_DebugBreakCallHelper(masm, edx.bit() | edi.bit(),
- 0, false);
-}
-
-
-void DebugCodegen::GenerateReturnDebugBreak(MacroAssembler* masm) {
- // Register state just before return from JS function (from codegen-x87.cc).
- // ----------- S t a t e -------------
- // -- eax: return value
- // -----------------------------------
- Generate_DebugBreakCallHelper(masm, eax.bit(), 0, true);
-}
-
-
-void DebugCodegen::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) {
- // Register state for CallFunctionStub (from code-stubs-x87.cc).
- // ----------- S t a t e -------------
- // -- edi: function
- // -----------------------------------
- Generate_DebugBreakCallHelper(masm, edi.bit(), 0, false);
-}
-
-
-void DebugCodegen::GenerateCallConstructStubDebugBreak(MacroAssembler* masm) {
- // Register state for CallConstructStub (from code-stubs-x87.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 DebugCodegen::GenerateCallConstructStubRecordDebugBreak(
- MacroAssembler* masm) {
- // Register state for CallConstructStub (from code-stubs-x87.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: feedback array
- // -- edx: feedback slot (smi)
- // -- edi: constructor function
- // -----------------------------------
- // The number of arguments in eax is not smi encoded.
- Generate_DebugBreakCallHelper(masm, ebx.bit() | edx.bit() | edi.bit(),
- eax.bit(), false);
-}
-
-
-void DebugCodegen::GenerateSlot(MacroAssembler* masm) {
- // Generate enough nop's to make space for a call instruction.
- Label check_codesize;
- __ bind(&check_codesize);
- __ RecordDebugBreakSlot();
- __ Nop(Assembler::kDebugBreakSlotLength);
- DCHECK_EQ(Assembler::kDebugBreakSlotLength,
- masm->SizeOfCodeGeneratedSince(&check_codesize));
-}
-
-
-void DebugCodegen::GenerateSlotDebugBreak(MacroAssembler* masm) {
- Generate_DebugBreakCallHelper(masm, 0, 0, true);
-}
-
-
-void DebugCodegen::GeneratePlainReturnLiveEdit(MacroAssembler* masm) {
- masm->ret(0);
-}
-
-
-void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
- ExternalReference restarter_frame_function_slot =
- ExternalReference::debug_restarter_frame_function_pointer_address(
- 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 LiveEdit::kFrameDropperSupported = true;
-
-#undef __
-
-} // namespace internal
-} // namespace v8
-
-#endif // V8_TARGET_ARCH_X87
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