1212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org// Copyright 2012 the V8 project authors. All rights reserved. 28bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// Redistribution and use in source and binary forms, with or without 38bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// modification, are permitted provided that the following conditions are 48bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// met: 58bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// 68bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// * Redistributions of source code must retain the above copyright 78bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// notice, this list of conditions and the following disclaimer. 88bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// * Redistributions in binary form must reproduce the above 98bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// copyright notice, this list of conditions and the following 108bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// disclaimer in the documentation and/or other materials provided 118bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// with the distribution. 128bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// * Neither the name of Google Inc. nor the names of its 138bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// contributors may be used to endorse or promote products derived 148bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// from this software without specific prior written permission. 158bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// 168bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 178bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 188bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 198bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 208bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 218bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 228bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 238bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 248bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 258bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 268bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 278bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 288bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org#include "v8.h" 298bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 3093a47f4837f2137c8d8349250fd8e91da3108126jkummerow@chromium.org#if V8_TARGET_ARCH_IA32 319dfbea4c7d423c7bc1db94425cb78e7f7cf41f78erik.corry@gmail.com 3244bc7080a85cc25bff3b9b77cd53f7beffab711bkarlklose@chromium.org#include "codegen.h" 338bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org#include "debug.h" 348bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 358bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 3671affb54842da76b24f0bb3184e9f0960523f89dkasperl@chromium.orgnamespace v8 { 3771affb54842da76b24f0bb3184e9f0960523f89dkasperl@chromium.orgnamespace internal { 388bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 3965dad4b091d2925543c6326db635d0f7cf9e1edcager@chromium.org#ifdef ENABLE_DEBUGGER_SUPPORT 408bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 41245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.orgbool BreakLocationIterator::IsDebugBreakAtReturn() { 42381abbb58260f2fc7d346d0e2f83d0f132a4c14bager@chromium.org return Debug::IsDebugBreakAtReturn(rinfo()); 43245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org} 44245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org 45245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org 46245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org// Patch the JS frame exit code with a debug break call. See 47245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org// CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-ia32.cc 48245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org// for the precise return instructions sequence. 49245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.orgvoid BreakLocationIterator::SetDebugBreakAtReturn() { 50ac6aa175ab59d65cfb7a88dbb621e1d7f1a80b8fsgjesse@chromium.org ASSERT(Assembler::kJSReturnSequenceLength >= 51ac6aa175ab59d65cfb7a88dbb621e1d7f1a80b8fsgjesse@chromium.org Assembler::kCallInstructionLength); 52ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org Isolate* isolate = Isolate::Current(); 53ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org rinfo()->PatchCodeWithCall(isolate->debug()->debug_break_return()->entry(), 54ac6aa175ab59d65cfb7a88dbb621e1d7f1a80b8fsgjesse@chromium.org Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); 55245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org} 56245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org 57245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org 58245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org// Restore the JS frame exit code. 59245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.orgvoid BreakLocationIterator::ClearDebugBreakAtReturn() { 60245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org rinfo()->PatchCode(original_rinfo()->pc(), 61ac6aa175ab59d65cfb7a88dbb621e1d7f1a80b8fsgjesse@chromium.org Assembler::kJSReturnSequenceLength); 62245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org} 63245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org 64245aa859d34fd516161c48ef4c69d38d9b889284iposva@chromium.org 65a1645e29968e70a41226edda2c49788fcea48b74ager@chromium.org// A debug break in the frame exit code is identified by the JS frame exit code 66a1645e29968e70a41226edda2c49788fcea48b74ager@chromium.org// having been patched with a call instruction. 67381abbb58260f2fc7d346d0e2f83d0f132a4c14bager@chromium.orgbool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) { 68381abbb58260f2fc7d346d0e2f83d0f132a4c14bager@chromium.org ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); 699d58c2b1c27d8b2890b9bd46e57d3842b09e0292christian.plesner.hansen@gmail.com return rinfo->IsPatchedReturnSequence(); 70381abbb58260f2fc7d346d0e2f83d0f132a4c14bager@chromium.org} 71381abbb58260f2fc7d346d0e2f83d0f132a4c14bager@chromium.org 72381abbb58260f2fc7d346d0e2f83d0f132a4c14bager@chromium.org 732356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.orgbool BreakLocationIterator::IsDebugBreakAtSlot() { 742356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org ASSERT(IsDebugBreakSlot()); 752356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org // Check whether the debug break slot instructions have been patched. 762356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org return rinfo()->IsPatchedDebugBreakSlotSequence(); 772356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org} 782356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 792356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 802356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.orgvoid BreakLocationIterator::SetDebugBreakAtSlot() { 812356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org ASSERT(IsDebugBreakSlot()); 82ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org Isolate* isolate = Isolate::Current(); 832356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org rinfo()->PatchCodeWithCall( 84ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org isolate->debug()->debug_break_slot()->entry(), 852356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); 862356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org} 872356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 882356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 892356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.orgvoid BreakLocationIterator::ClearDebugBreakAtSlot() { 902356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org ASSERT(IsDebugBreakSlot()); 912356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); 922356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org} 932356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 94e0e1b0d3e70c933d36ed381d511e9fda39f2a751mstarzinger@chromium.org 95212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org// All debug break stubs support padding for LiveEdit. 96212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.orgconst bool Debug::FramePaddingLayout::kIsSupported = true; 972356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 988bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 99212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org#define __ ACCESS_MASM(masm) 1008bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 1018bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgstatic void Generate_DebugBreakCallHelper(MacroAssembler* masm, 102d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org RegList object_regs, 103d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org RegList non_object_regs, 1048bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org bool convert_call_to_jmp) { 1058bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Enter an internal frame. 106c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com { 107c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com FrameScope scope(masm, StackFrame::INTERNAL); 108c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com 109212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org // Load padding words on stack. 110212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org for (int i = 0; i < Debug::FramePaddingLayout::kInitialSize; i++) { 111212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org __ push(Immediate(Smi::FromInt( 112212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org Debug::FramePaddingLayout::kPaddingValue))); 113212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org } 114212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org __ push(Immediate(Smi::FromInt(Debug::FramePaddingLayout::kInitialSize))); 115212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org 116c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com // Store the registers containing live values on the expression stack to 117c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com // make sure that these are correctly updated during GC. Non object values 118c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com // are stored as a smi causing it to be untouched by GC. 119c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com ASSERT((object_regs & ~kJSCallerSaved) == 0); 120c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com ASSERT((non_object_regs & ~kJSCallerSaved) == 0); 121c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com ASSERT((object_regs & non_object_regs) == 0); 122c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com for (int i = 0; i < kNumJSCallerSaved; i++) { 123c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com int r = JSCallerSavedCode(i); 124c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com Register reg = { r }; 125c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com if ((object_regs & (1 << r)) != 0) { 126c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ push(reg); 127c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 128c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com if ((non_object_regs & (1 << r)) != 0) { 129c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com if (FLAG_debug_code) { 130c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ test(reg, Immediate(0xc0000000)); 131594006017e46d82ed7146611dc12c20e3c509c7ddanno@chromium.org __ Assert(zero, kUnableToEncodeValueAsSmi); 132c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 133c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ SmiTag(reg); 134c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ push(reg); 135d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org } 136d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org } 1378bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 1388bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org#ifdef DEBUG 139c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ RecordComment("// Calling from debug break to runtime - come in - over"); 1408bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org#endif 141c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ Set(eax, Immediate(0)); // No arguments. 142c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ mov(ebx, Immediate(ExternalReference::debug_break(masm->isolate()))); 143c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com 144c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com CEntryStub ceb(1); 145c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ CallStub(&ceb); 146c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com 147212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org // Automatically find register that could be used after register restore. 148212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org // We need one register for padding skip instructions. 149212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org Register unused_reg = { -1 }; 150212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org 151c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com // Restore the register values containing object pointers from the 152c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com // expression stack. 153c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com for (int i = kNumJSCallerSaved; --i >= 0;) { 154c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com int r = JSCallerSavedCode(i); 155c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com Register reg = { r }; 156c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com if (FLAG_debug_code) { 157c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ Set(reg, Immediate(kDebugZapValue)); 158c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 159212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org bool taken = reg.code() == esi.code(); 160c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com if ((object_regs & (1 << r)) != 0) { 161c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ pop(reg); 162212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org taken = true; 163c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 164c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com if ((non_object_regs & (1 << r)) != 0) { 165c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ pop(reg); 166c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ SmiUntag(reg); 167212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org taken = true; 168212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org } 169212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org if (!taken) { 170212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org unused_reg = reg; 171c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 172d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org } 1738bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 174212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org ASSERT(unused_reg.code() != -1); 175212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org 176212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org // Read current padding counter and skip corresponding number of words. 177212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org __ pop(unused_reg); 178212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org // We divide stored value by 2 (untagging) and multiply it by word's size. 179d6899c3545b051ec84363203d4235f883b4981bfulan@chromium.org STATIC_ASSERT(kSmiTagSize == 1 && kSmiShiftSize == 0); 180212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org __ lea(esp, Operand(esp, unused_reg, times_half_pointer_size, 0)); 181212d964d8f853ddb1fdf3a64037f3af294d55cf3jkummerow@chromium.org 182c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com // Get rid of the internal frame. 183c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 1848bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 1858bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // If this call did not replace a call but patched other code then there will 1868bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // be an unwanted return address left on the stack. Here we get rid of that. 1878bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org if (convert_call_to_jmp) { 188c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ add(esp, Immediate(kPointerSize)); 1898bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org } 1908bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 1918bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Now that the break point has been handled, resume normal execution by 1928bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // jumping to the target address intended by the caller and that was 1938bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // overwritten by the address of DebugBreakXXX. 1948bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org ExternalReference after_break_target = 195ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org ExternalReference(Debug_Address::AfterBreakTarget(), masm->isolate()); 1968bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org __ jmp(Operand::StaticVariable(after_break_target)); 1978bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 1988bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 1998bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2008bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgvoid Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) { 2018bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Register state for IC load call (from ic-ia32.cc). 2028bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 2038bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // -- ecx : name 2041044a4d5f9e933d03cf05a0d7d49d8afccec0879danno@chromium.org // -- edx : receiver 2058bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 2061044a4d5f9e933d03cf05a0d7d49d8afccec0879danno@chromium.org Generate_DebugBreakCallHelper(masm, ecx.bit() | edx.bit(), 0, false); 2078bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2088bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2098bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2108bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgvoid Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) { 211b302e56e5b70c4504faa2adf4ec3efb64a9d3e38sgjesse@chromium.org // Register state for IC store call (from ic-ia32.cc). 2128bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 2138bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // -- eax : value 2148bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // -- ecx : name 215b302e56e5b70c4504faa2adf4ec3efb64a9d3e38sgjesse@chromium.org // -- edx : receiver 2168bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 217d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org Generate_DebugBreakCallHelper( 218d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org masm, eax.bit() | ecx.bit() | edx.bit(), 0, false); 2198bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2208bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2218bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2228bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgvoid Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) { 2238bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Register state for keyed IC load call (from ic-ia32.cc). 2248bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 2251044a4d5f9e933d03cf05a0d7d49d8afccec0879danno@chromium.org // -- ecx : key 226ce5e87bd905d592a8bd612b3dedf7a994177c13aager@chromium.org // -- edx : receiver 2278bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 2281044a4d5f9e933d03cf05a0d7d49d8afccec0879danno@chromium.org Generate_DebugBreakCallHelper(masm, ecx.bit() | edx.bit(), 0, false); 2298bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2308bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2318bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2328bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgvoid Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) { 2338bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Register state for keyed IC load call (from ic-ia32.cc). 2348bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 2358bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // -- eax : value 236ce5e87bd905d592a8bd612b3dedf7a994177c13aager@chromium.org // -- ecx : key 237ce5e87bd905d592a8bd612b3dedf7a994177c13aager@chromium.org // -- edx : receiver 2388bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 239d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org Generate_DebugBreakCallHelper( 240d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org masm, eax.bit() | ecx.bit() | edx.bit(), 0, false); 2418bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2428bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2438bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 244f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.orgvoid Debug::GenerateCompareNilICDebugBreak(MacroAssembler* masm) { 245f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org // Register state for CompareNil IC 246f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org // ----------- S t a t e ------------- 247f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org // -- eax : value 248f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org // ----------------------------------- 249f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org Generate_DebugBreakCallHelper(masm, eax.bit(), 0, false); 250f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org} 251f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org 252f005df6c3232e65028420519fbab7284bc9b33aedanno@chromium.org 2538bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgvoid Debug::GenerateCallICDebugBreak(MacroAssembler* masm) { 2548bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Register state for keyed IC call call (from ic-ia32.cc) 2558bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 25665fae84840520e9ce49a78bf542abf073b49ac3fricow@chromium.org // -- ecx: name 2578bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 258d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org Generate_DebugBreakCallHelper(masm, ecx.bit(), 0, false); 2598bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2608bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2618bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2628bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.orgvoid Debug::GenerateReturnDebugBreak(MacroAssembler* masm) { 2638bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // Register state just before return from JS function (from codegen-ia32.cc). 2648bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 2658bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // -- eax: return value 2668bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 267d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org Generate_DebugBreakCallHelper(masm, eax.bit(), 0, true); 2688bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2698bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2708bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 271c612e0211bdb8821cbd7886e15b0273ed82d2e9edanno@chromium.orgvoid Debug::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) { 272fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // Register state for CallFunctionStub (from code-stubs-ia32.cc). 2738bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------- S t a t e ------------- 274c612e0211bdb8821cbd7886e15b0273ed82d2e9edanno@chromium.org // -- edi: function 2758bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org // ----------------------------------- 276c612e0211bdb8821cbd7886e15b0273ed82d2e9edanno@chromium.org Generate_DebugBreakCallHelper(masm, edi.bit(), 0, false); 2778bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} 2788bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 2798bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 280fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.orgvoid Debug::GenerateCallFunctionStubRecordDebugBreak(MacroAssembler* masm) { 281fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // Register state for CallFunctionStub (from code-stubs-ia32.cc). 282fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // ----------- S t a t e ------------- 283fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- ebx: cache cell for call target 284fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- edi: function 285fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // ----------------------------------- 286fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org Generate_DebugBreakCallHelper(masm, ebx.bit() | edi.bit(), 0, false); 287fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org} 288fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org 289fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org 290fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.orgvoid Debug::GenerateCallConstructStubDebugBreak(MacroAssembler* masm) { 291fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // Register state for CallConstructStub (from code-stubs-ia32.cc). 292fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // eax is the actual number of arguments not encoded as a smi see comment 293fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // above IC call. 294fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // ----------- S t a t e ------------- 295fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- eax: number of arguments (not smi) 296fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- edi: constructor function 297fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // ----------------------------------- 298fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // The number of arguments in eax is not smi encoded. 299fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org Generate_DebugBreakCallHelper(masm, edi.bit(), eax.bit(), false); 300fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org} 301fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org 302fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org 303fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.orgvoid Debug::GenerateCallConstructStubRecordDebugBreak(MacroAssembler* masm) { 304fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // Register state for CallConstructStub (from code-stubs-ia32.cc). 305fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // eax is the actual number of arguments not encoded as a smi see comment 306fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // above IC call. 307fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // ----------- S t a t e ------------- 308fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- eax: number of arguments (not smi) 309fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- ebx: cache cell for call target 310fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // -- edi: constructor function 311fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // ----------------------------------- 312fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org // The number of arguments in eax is not smi encoded. 313fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org Generate_DebugBreakCallHelper(masm, ebx.bit() | edi.bit(), eax.bit(), false); 314fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org} 315fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org 316fa458e413c3e5b8d479e49258d060b7bb4567c57danno@chromium.org 3172356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.orgvoid Debug::GenerateSlot(MacroAssembler* masm) { 3182356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org // Generate enough nop's to make space for a call instruction. 3192356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org Label check_codesize; 3202356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org __ bind(&check_codesize); 3212356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org __ RecordDebugBreakSlot(); 32264e3a4be4a99f31920128de34573c8ac9038de42ricow@chromium.org __ Nop(Assembler::kDebugBreakSlotLength); 3232356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org ASSERT_EQ(Assembler::kDebugBreakSlotLength, 3242356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org masm->SizeOfCodeGeneratedSince(&check_codesize)); 3252356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org} 3262356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 3272356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 3282356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.orgvoid Debug::GenerateSlotDebugBreak(MacroAssembler* masm) { 3292356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org // In the places where a debug break slot is inserted no registers can contain 3302356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org // object pointers. 331d236f4d96b5dd21acc5ec57f4e50fa97cdd97bb6ricow@chromium.org Generate_DebugBreakCallHelper(masm, 0, 0, true); 3322356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org} 3332356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 3342356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 335357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.orgvoid Debug::GeneratePlainReturnLiveEdit(MacroAssembler* masm) { 336357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org masm->ret(0); 337357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org} 338357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 3392356e6fbe66ac3aa027b61cb43a3c3619b3c3a5evegorov@chromium.org 340357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.orgvoid Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { 341e90029b96bc4097e0f14d33cc086030d7ad5007awhesse@chromium.org ExternalReference restarter_frame_function_slot = 342ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org ExternalReference(Debug_Address::RestarterFrameFunctionPointer(), 343ea88ce93dcb41a9200ec8747ae7642a5db1f4ce7sgjesse@chromium.org masm->isolate()); 344e90029b96bc4097e0f14d33cc086030d7ad5007awhesse@chromium.org __ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0)); 345e90029b96bc4097e0f14d33cc086030d7ad5007awhesse@chromium.org 346357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org // We do not know our frame height, but set esp based on ebp. 347ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.org __ lea(esp, Operand(ebp, -1 * kPointerSize)); 348357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 349ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.org __ pop(edi); // Function. 350357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org __ pop(ebp); 351357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 352ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.org // Load context from the function. 353ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.org __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); 354ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.org 355357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org // Get function code. 356357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); 357357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); 358357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); 359357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 360357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org // Re-run JSFunction, edi is function, esi is context. 361c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ jmp(edx); 362357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org} 363357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 364ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.orgconst bool Debug::kFrameDropperSupported = true; 365357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 366ea4f62e1df22417fc8dc2c2425485dca98b13d07ager@chromium.org#undef __ 367357bf65ed5309ac3a2c4bf20b6ce7770488787c2ager@chromium.org 36865dad4b091d2925543c6326db635d0f7cf9e1edcager@chromium.org#endif // ENABLE_DEBUGGER_SUPPORT 3698bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org 3708bb60585bafbf81564e6b30fcf18c82615a76f95ager@chromium.org} } // namespace v8::internal 3719dfbea4c7d423c7bc1db94425cb78e7f7cf41f78erik.corry@gmail.com 3729dfbea4c7d423c7bc1db94425cb78e7f7cf41f78erik.corry@gmail.com#endif // V8_TARGET_ARCH_IA32 373