18b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch// Copyright 2011 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "v8.h" 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 30f7060e27768c550ace7ec48ad8c093466db52dfaLeon Clarke#if defined(V8_TARGET_ARCH_IA32) 31f7060e27768c550ace7ec48ad8c093466db52dfaLeon Clarke 328b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch#include "codegen.h" 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "debug.h" 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef ENABLE_DEBUGGER_SUPPORT 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockbool BreakLocationIterator::IsDebugBreakAtReturn() { 42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return Debug::IsDebugBreakAtReturn(rinfo()); 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Patch the JS frame exit code with a debug break call. See 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-ia32.cc 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// for the precise return instructions sequence. 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid BreakLocationIterator::SetDebugBreakAtReturn() { 50d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ASSERT(Assembler::kJSReturnSequenceLength >= 51d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block Assembler::kCallInstructionLength); 5244f0eee88ff00398ff7f715fab053374d808c90dSteve Block Isolate* isolate = Isolate::Current(); 5344f0eee88ff00398ff7f715fab053374d808c90dSteve Block rinfo()->PatchCodeWithCall(isolate->debug()->debug_break_return()->entry(), 54d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Restore the JS frame exit code. 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid BreakLocationIterator::ClearDebugBreakAtReturn() { 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block rinfo()->PatchCode(original_rinfo()->pc(), 61d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block Assembler::kJSReturnSequenceLength); 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 63a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 65a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A debug break in the frame exit code is identified by the JS frame exit code 66a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// having been patched with a call instruction. 67a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockbool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) { 68a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); 693ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block return rinfo->IsPatchedReturnSequence(); 70a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 71a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 72a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 737f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdochbool BreakLocationIterator::IsDebugBreakAtSlot() { 747f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch ASSERT(IsDebugBreakSlot()); 757f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch // Check whether the debug break slot instructions have been patched. 767f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch return rinfo()->IsPatchedDebugBreakSlotSequence(); 777f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch} 787f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 797f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 807f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdochvoid BreakLocationIterator::SetDebugBreakAtSlot() { 817f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch ASSERT(IsDebugBreakSlot()); 8244f0eee88ff00398ff7f715fab053374d808c90dSteve Block Isolate* isolate = Isolate::Current(); 837f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch rinfo()->PatchCodeWithCall( 8444f0eee88ff00398ff7f715fab053374d808c90dSteve Block isolate->debug()->debug_break_slot()->entry(), 857f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); 867f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch} 877f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 887f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 897f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdochvoid BreakLocationIterator::ClearDebugBreakAtSlot() { 907f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch ASSERT(IsDebugBreakSlot()); 917f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); 927f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch} 937f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 947f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 95a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#define __ ACCESS_MASM(masm) 96a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 97a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 98a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockstatic void Generate_DebugBreakCallHelper(MacroAssembler* masm, 9980d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen RegList object_regs, 10080d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen RegList non_object_regs, 101a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool convert_call_to_jmp) { 102a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Enter an internal frame. 1033ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch { 1043ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch FrameScope scope(masm, StackFrame::INTERNAL); 1053ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 1063ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Store the registers containing live values on the expression stack to 1073ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // make sure that these are correctly updated during GC. Non object values 1083ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // are stored as a smi causing it to be untouched by GC. 1093ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch ASSERT((object_regs & ~kJSCallerSaved) == 0); 1103ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch ASSERT((non_object_regs & ~kJSCallerSaved) == 0); 1113ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch ASSERT((object_regs & non_object_regs) == 0); 1123ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch for (int i = 0; i < kNumJSCallerSaved; i++) { 1133ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch int r = JSCallerSavedCode(i); 1143ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch Register reg = { r }; 1153ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if ((object_regs & (1 << r)) != 0) { 1163ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ push(reg); 1173ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1183ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if ((non_object_regs & (1 << r)) != 0) { 1193ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if (FLAG_debug_code) { 1203ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ test(reg, Immediate(0xc0000000)); 1213ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ Assert(zero, "Unable to encode value as smi"); 1223ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1233ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ SmiTag(reg); 1243ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ push(reg); 12580d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen } 12680d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen } 127a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 128a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 1293ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ RecordComment("// Calling from debug break to runtime - come in - over"); 130a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 1313ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ Set(eax, Immediate(0)); // No arguments. 1323ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ mov(ebx, Immediate(ExternalReference::debug_break(masm->isolate()))); 1333ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 1343ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch CEntryStub ceb(1); 1353ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ CallStub(&ceb); 1363ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 1373ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Restore the register values containing object pointers from the 1383ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // expression stack. 1393ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch for (int i = kNumJSCallerSaved; --i >= 0;) { 1403ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch int r = JSCallerSavedCode(i); 1413ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch Register reg = { r }; 1423ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if (FLAG_debug_code) { 1433ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ Set(reg, Immediate(kDebugZapValue)); 1443ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1453ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if ((object_regs & (1 << r)) != 0) { 1463ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ pop(reg); 1473ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 1483ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch if ((non_object_regs & (1 << r)) != 0) { 1493ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ pop(reg); 1503ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ SmiUntag(reg); 1513ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 15280d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen } 153a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1543ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Get rid of the internal frame. 1553ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 15685b71799222b55eb5dd74ea26efe0c64ab655c8cBen Murdoch 157a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If this call did not replace a call but patched other code then there will 158a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // be an unwanted return address left on the stack. Here we get rid of that. 159a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (convert_call_to_jmp) { 1603ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ add(esp, Immediate(kPointerSize)); 161a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 162a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 163a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Now that the break point has been handled, resume normal execution by 164a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // jumping to the target address intended by the caller and that was 165a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // overwritten by the address of DebugBreakXXX. 166a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference after_break_target = 16744f0eee88ff00398ff7f715fab053374d808c90dSteve Block ExternalReference(Debug_Address::AfterBreakTarget(), masm->isolate()); 168a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block __ jmp(Operand::StaticVariable(after_break_target)); 169a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 170a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 171a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 172a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) { 173a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Register state for IC load call (from ic-ia32.cc). 174a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------- S t a t e ------------- 175402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // -- eax : receiver 176a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // -- ecx : name 177a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------------------------------- 17880d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen Generate_DebugBreakCallHelper(masm, eax.bit() | ecx.bit(), 0, false); 179a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 180a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 181a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 182a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) { 1834515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // Register state for IC store call (from ic-ia32.cc). 184a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------- S t a t e ------------- 185a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // -- eax : value 186a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // -- ecx : name 1874515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // -- edx : receiver 188a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------------------------------- 18980d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen Generate_DebugBreakCallHelper( 19080d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen masm, eax.bit() | ecx.bit() | edx.bit(), 0, false); 191a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 192a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 193a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 194a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) { 195a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Register state for keyed IC load call (from ic-ia32.cc). 196a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------- S t a t e ------------- 1976ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // -- edx : receiver 1986ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // -- eax : key 199a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------------------------------- 20080d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen Generate_DebugBreakCallHelper(masm, eax.bit() | edx.bit(), 0, false); 201a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 202a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 203a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 204a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) { 205a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Register state for keyed IC load call (from ic-ia32.cc). 206a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------- S t a t e ------------- 207a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // -- eax : value 2086ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // -- ecx : key 2096ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // -- edx : receiver 210a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------------------------------- 21180d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen Generate_DebugBreakCallHelper( 21280d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen masm, eax.bit() | ecx.bit() | edx.bit(), 0, false); 213a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 214a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 215a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 216a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid Debug::GenerateCallICDebugBreak(MacroAssembler* masm) { 217a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Register state for keyed IC call call (from ic-ia32.cc) 218a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------- S t a t e ------------- 21980d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen // -- ecx: name 220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ----------------------------------- 22180d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen Generate_DebugBreakCallHelper(masm, ecx.bit(), 0, false); 222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 223a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 2253ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochvoid Debug::GenerateReturnDebugBreak(MacroAssembler* masm) { 226a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Register state just before return from JS function (from codegen-ia32.cc). 2273ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // ----------- S t a t e ------------- 2283ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- eax: return value 2293ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // ----------------------------------- 2303ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch Generate_DebugBreakCallHelper(masm, eax.bit(), 0, true); 2313ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch} 2323ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 2333ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 2343ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochvoid Debug::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) { 2353ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Register state for CallFunctionStub (from code-stubs-ia32.cc). 2363ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // ----------- S t a t e ------------- 2373ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- edi: function 2383ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // ----------------------------------- 2393ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch Generate_DebugBreakCallHelper(masm, edi.bit(), 0, false); 2403ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch} 2413ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 2423ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 2433ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochvoid Debug::GenerateCallFunctionStubRecordDebugBreak(MacroAssembler* masm) { 2443ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Register state for CallFunctionStub (from code-stubs-ia32.cc). 2453ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // ----------- S t a t e ------------- 2463ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- ebx: cache cell for call target 2473ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- edi: function 2483ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // ----------------------------------- 2493ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch Generate_DebugBreakCallHelper(masm, ebx.bit() | edi.bit(), 0, false); 2503ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch} 2513ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 2523ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 2533ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochvoid Debug::GenerateCallConstructStubDebugBreak(MacroAssembler* masm) { 2543ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Register state for CallConstructStub (from code-stubs-ia32.cc). 2555d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // eax is the actual number of arguments not encoded as a smi see comment 2565d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // above IC call. 2575d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // ----------- S t a t e ------------- 2585d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // -- eax: number of arguments (not smi) 2595d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // -- edi: constructor function 2605d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // ----------------------------------- 2615d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch // The number of arguments in eax is not smi encoded. 2625d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch Generate_DebugBreakCallHelper(masm, edi.bit(), eax.bit(), false); 2635d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch} 2645d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch 2655d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch 2663ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochvoid Debug::GenerateCallConstructStubRecordDebugBreak(MacroAssembler* masm) { 2673ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Register state for CallConstructStub (from code-stubs-ia32.cc). 2683ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // eax is the actual number of arguments not encoded as a smi see comment 2693ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // above IC call. 27085b71799222b55eb5dd74ea26efe0c64ab655c8cBen Murdoch // ----------- S t a t e ------------- 2713ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- eax: number of arguments (not smi) 2723ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- ebx: cache cell for call target 2733ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // -- edi: constructor function 27485b71799222b55eb5dd74ea26efe0c64ab655c8cBen Murdoch // ----------------------------------- 2753ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // The number of arguments in eax is not smi encoded. 2763ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch Generate_DebugBreakCallHelper(masm, ebx.bit() | edi.bit(), eax.bit(), false); 2775d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch} 2785d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch 2795d4cdbf7a67d3662fa0bee4efdb7edd8daec9b0bBen Murdoch 2807f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdochvoid Debug::GenerateSlot(MacroAssembler* masm) { 2817f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch // Generate enough nop's to make space for a call instruction. 2827f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch Label check_codesize; 2837f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch __ bind(&check_codesize); 2847f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch __ RecordDebugBreakSlot(); 2853ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ Nop(Assembler::kDebugBreakSlotLength); 2867f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch ASSERT_EQ(Assembler::kDebugBreakSlotLength, 2877f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch masm->SizeOfCodeGeneratedSince(&check_codesize)); 2887f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch} 2897f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 2907f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 2917f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdochvoid Debug::GenerateSlotDebugBreak(MacroAssembler* masm) { 2927f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch // In the places where a debug break slot is inserted no registers can contain 2937f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch // object pointers. 29480d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen Generate_DebugBreakCallHelper(masm, 0, 0, true); 2957f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch} 2967f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 2977f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 2986ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid Debug::GeneratePlainReturnLiveEdit(MacroAssembler* masm) { 2996ded16be15dd865a9b21ea304d5273c8be299c87Steve Block masm->ret(0); 3006ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 3016ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3027f4d5bd8c03935e2c0cd412e561b8fc5a6a880aeBen Murdoch 3036ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { 304bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch ExternalReference restarter_frame_function_slot = 30544f0eee88ff00398ff7f715fab053374d808c90dSteve Block ExternalReference(Debug_Address::RestarterFrameFunctionPointer(), 30644f0eee88ff00398ff7f715fab053374d808c90dSteve Block masm->isolate()); 307bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch __ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0)); 308bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch 3096ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // We do not know our frame height, but set esp based on ebp. 310756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrick __ lea(esp, Operand(ebp, -1 * kPointerSize)); 3116ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 312756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrick __ pop(edi); // Function. 3136ded16be15dd865a9b21ea304d5273c8be299c87Steve Block __ pop(ebp); 3146ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 315756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrick // Load context from the function. 316756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrick __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); 317756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrick 3186ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Get function code. 3196ded16be15dd865a9b21ea304d5273c8be299c87Steve Block __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); 3206ded16be15dd865a9b21ea304d5273c8be299c87Steve Block __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); 3216ded16be15dd865a9b21ea304d5273c8be299c87Steve Block __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); 3226ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3236ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Re-run JSFunction, edi is function, esi is context. 3243ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ jmp(edx); 3256ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 3266ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 327756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrickconst bool Debug::kFrameDropperSupported = true; 3286ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 329756813857a4c2a4d8ad2e805969d5768d3cf43a0Iain Merrick#undef __ 3306ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 331a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // ENABLE_DEBUGGER_SUPPORT 332a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 333a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} } // namespace v8::internal 334f7060e27768c550ace7ec48ad8c093466db52dfaLeon Clarke 335f7060e27768c550ace7ec48ad8c093466db52dfaLeon Clarke#endif // V8_TARGET_ARCH_IA32 336