jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
rossberg@chromium.org | 3484964 | 2014-04-29 16:30:47 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 4 | |
machenbach@chromium.org | 196eb60 | 2014-06-04 00:06:13 +0000 | [diff] [blame] | 5 | #include "src/v8.h" |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 6 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 7 | #if V8_TARGET_ARCH_IA32 |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 8 | |
machenbach@chromium.org | 196eb60 | 2014-06-04 00:06:13 +0000 | [diff] [blame] | 9 | #include "src/codegen.h" |
| 10 | #include "src/debug.h" |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 11 | |
| 12 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 13 | namespace v8 { |
| 14 | namespace internal { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 15 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 16 | bool BreakLocationIterator::IsDebugBreakAtReturn() { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 17 | return Debug::IsDebugBreakAtReturn(rinfo()); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 18 | } |
| 19 | |
| 20 | |
| 21 | // Patch the JS frame exit code with a debug break call. See |
| 22 | // CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-ia32.cc |
| 23 | // for the precise return instructions sequence. |
| 24 | void BreakLocationIterator::SetDebugBreakAtReturn() { |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 25 | DCHECK(Assembler::kJSReturnSequenceLength >= |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 26 | Assembler::kCallInstructionLength); |
dslomov@chromium.org | e97852d | 2013-09-12 09:02:59 +0000 | [diff] [blame] | 27 | rinfo()->PatchCodeWithCall( |
machenbach@chromium.org | af6f699 | 2014-05-06 00:04:47 +0000 | [diff] [blame] | 28 | debug_info_->GetIsolate()->builtins()->Return_DebugBreak()->entry(), |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 29 | Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | |
| 33 | // Restore the JS frame exit code. |
| 34 | void BreakLocationIterator::ClearDebugBreakAtReturn() { |
| 35 | rinfo()->PatchCode(original_rinfo()->pc(), |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 36 | Assembler::kJSReturnSequenceLength); |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 37 | } |
| 38 | |
| 39 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 40 | // A debug break in the frame exit code is identified by the JS frame exit code |
| 41 | // having been patched with a call instruction. |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 42 | bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) { |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 43 | DCHECK(RelocInfo::IsJSReturn(rinfo->rmode())); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 44 | return rinfo->IsPatchedReturnSequence(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 48 | bool BreakLocationIterator::IsDebugBreakAtSlot() { |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 49 | DCHECK(IsDebugBreakSlot()); |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 50 | // Check whether the debug break slot instructions have been patched. |
| 51 | return rinfo()->IsPatchedDebugBreakSlotSequence(); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | void BreakLocationIterator::SetDebugBreakAtSlot() { |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 56 | DCHECK(IsDebugBreakSlot()); |
dslomov@chromium.org | e97852d | 2013-09-12 09:02:59 +0000 | [diff] [blame] | 57 | Isolate* isolate = debug_info_->GetIsolate(); |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 58 | rinfo()->PatchCodeWithCall( |
machenbach@chromium.org | af6f699 | 2014-05-06 00:04:47 +0000 | [diff] [blame] | 59 | isolate->builtins()->Slot_DebugBreak()->entry(), |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 60 | Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | void BreakLocationIterator::ClearDebugBreakAtSlot() { |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 65 | DCHECK(IsDebugBreakSlot()); |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 66 | rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); |
| 67 | } |
| 68 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 69 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 70 | #define __ ACCESS_MASM(masm) |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 71 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 72 | static void Generate_DebugBreakCallHelper(MacroAssembler* masm, |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 73 | RegList object_regs, |
| 74 | RegList non_object_regs, |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 75 | bool convert_call_to_jmp) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 76 | // Enter an internal frame. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 77 | { |
| 78 | FrameScope scope(masm, StackFrame::INTERNAL); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 79 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 80 | // Load padding words on stack. |
machenbach@chromium.org | e31b63e | 2014-05-29 00:04:57 +0000 | [diff] [blame] | 81 | for (int i = 0; i < LiveEdit::kFramePaddingInitialSize; i++) { |
| 82 | __ push(Immediate(Smi::FromInt(LiveEdit::kFramePaddingValue))); |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 83 | } |
machenbach@chromium.org | e31b63e | 2014-05-29 00:04:57 +0000 | [diff] [blame] | 84 | __ push(Immediate(Smi::FromInt(LiveEdit::kFramePaddingInitialSize))); |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 85 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 86 | // Store the registers containing live values on the expression stack to |
| 87 | // make sure that these are correctly updated during GC. Non object values |
| 88 | // are stored as a smi causing it to be untouched by GC. |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 89 | DCHECK((object_regs & ~kJSCallerSaved) == 0); |
| 90 | DCHECK((non_object_regs & ~kJSCallerSaved) == 0); |
| 91 | DCHECK((object_regs & non_object_regs) == 0); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 92 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 93 | int r = JSCallerSavedCode(i); |
| 94 | Register reg = { r }; |
| 95 | if ((object_regs & (1 << r)) != 0) { |
| 96 | __ push(reg); |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 97 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 98 | if ((non_object_regs & (1 << r)) != 0) { |
| 99 | if (FLAG_debug_code) { |
| 100 | __ test(reg, Immediate(0xc0000000)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 101 | __ Assert(zero, kUnableToEncodeValueAsSmi); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 102 | } |
| 103 | __ SmiTag(reg); |
| 104 | __ push(reg); |
| 105 | } |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 106 | } |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 107 | |
| 108 | #ifdef DEBUG |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 109 | __ RecordComment("// Calling from debug break to runtime - come in - over"); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 110 | #endif |
machenbach@chromium.org | a221880 | 2014-03-25 07:30:47 +0000 | [diff] [blame] | 111 | __ Move(eax, Immediate(0)); // No arguments. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 112 | __ mov(ebx, Immediate(ExternalReference::debug_break(masm->isolate()))); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 113 | |
machenbach@chromium.org | f2f0489 | 2014-04-25 00:05:01 +0000 | [diff] [blame] | 114 | CEntryStub ceb(masm->isolate(), 1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 115 | __ CallStub(&ceb); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 116 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 117 | // Automatically find register that could be used after register restore. |
| 118 | // We need one register for padding skip instructions. |
| 119 | Register unused_reg = { -1 }; |
| 120 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 121 | // Restore the register values containing object pointers from the |
| 122 | // expression stack. |
| 123 | for (int i = kNumJSCallerSaved; --i >= 0;) { |
| 124 | int r = JSCallerSavedCode(i); |
| 125 | Register reg = { r }; |
| 126 | if (FLAG_debug_code) { |
machenbach@chromium.org | a221880 | 2014-03-25 07:30:47 +0000 | [diff] [blame] | 127 | __ Move(reg, Immediate(kDebugZapValue)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 128 | } |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 129 | bool taken = reg.code() == esi.code(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 130 | if ((object_regs & (1 << r)) != 0) { |
| 131 | __ pop(reg); |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 132 | taken = true; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 133 | } |
| 134 | if ((non_object_regs & (1 << r)) != 0) { |
| 135 | __ pop(reg); |
| 136 | __ SmiUntag(reg); |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 137 | taken = true; |
| 138 | } |
| 139 | if (!taken) { |
| 140 | unused_reg = reg; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 141 | } |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 142 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 143 | |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 144 | DCHECK(unused_reg.code() != -1); |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 145 | |
| 146 | // Read current padding counter and skip corresponding number of words. |
| 147 | __ pop(unused_reg); |
| 148 | // We divide stored value by 2 (untagging) and multiply it by word's size. |
ulan@chromium.org | d6899c3 | 2012-05-18 14:12:25 +0000 | [diff] [blame] | 149 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiShiftSize == 0); |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 150 | __ lea(esp, Operand(esp, unused_reg, times_half_pointer_size, 0)); |
| 151 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 152 | // Get rid of the internal frame. |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 153 | } |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 154 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 155 | // If this call did not replace a call but patched other code then there will |
| 156 | // be an unwanted return address left on the stack. Here we get rid of that. |
| 157 | if (convert_call_to_jmp) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 158 | __ add(esp, Immediate(kPointerSize)); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 159 | } |
| 160 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 161 | // Now that the break point has been handled, resume normal execution by |
| 162 | // jumping to the target address intended by the caller and that was |
| 163 | // overwritten by the address of DebugBreakXXX. |
| 164 | ExternalReference after_break_target = |
machenbach@chromium.org | fb547e0 | 2014-05-23 00:04:50 +0000 | [diff] [blame] | 165 | ExternalReference::debug_after_break_target_address(masm->isolate()); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 166 | __ jmp(Operand::StaticVariable(after_break_target)); |
| 167 | } |
| 168 | |
| 169 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 170 | void DebugCodegen::GenerateCallICStubDebugBreak(MacroAssembler* masm) { |
machenbach@chromium.org | a86d416 | 2014-05-01 00:05:11 +0000 | [diff] [blame] | 171 | // Register state for CallICStub |
| 172 | // ----------- S t a t e ------------- |
| 173 | // -- edx : type feedback slot (smi) |
| 174 | // -- edi : function |
| 175 | // ----------------------------------- |
| 176 | Generate_DebugBreakCallHelper(masm, edx.bit() | edi.bit(), |
| 177 | 0, false); |
| 178 | } |
| 179 | |
| 180 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 181 | void DebugCodegen::GenerateLoadICDebugBreak(MacroAssembler* masm) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 182 | // Register state for IC load call (from ic-ia32.cc). |
machenbach@chromium.org | 9aaa825 | 2014-09-04 10:39:50 +0000 | [diff] [blame] | 183 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 184 | Register name = LoadDescriptor::NameRegister(); |
machenbach@chromium.org | 248dd43 | 2014-06-30 00:04:54 +0000 | [diff] [blame] | 185 | Generate_DebugBreakCallHelper(masm, receiver.bit() | name.bit(), 0, false); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 189 | void DebugCodegen::GenerateStoreICDebugBreak(MacroAssembler* masm) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 190 | // Register state for IC store call (from ic-ia32.cc). |
machenbach@chromium.org | 9aaa825 | 2014-09-04 10:39:50 +0000 | [diff] [blame] | 191 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 192 | Register name = StoreDescriptor::NameRegister(); |
| 193 | Register value = StoreDescriptor::ValueRegister(); |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 194 | Generate_DebugBreakCallHelper( |
machenbach@chromium.org | 70d29e1 | 2014-07-11 07:33:43 +0000 | [diff] [blame] | 195 | masm, receiver.bit() | name.bit() | value.bit(), 0, false); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 199 | void DebugCodegen::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 200 | // Register state for keyed IC load call (from ic-ia32.cc). |
yangguo@chromium.org | 5de0074 | 2014-07-01 11:58:10 +0000 | [diff] [blame] | 201 | GenerateLoadICDebugBreak(masm); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 205 | void DebugCodegen::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) { |
machenbach@chromium.org | 70d29e1 | 2014-07-11 07:33:43 +0000 | [diff] [blame] | 206 | // Register state for keyed IC store call (from ic-ia32.cc). |
machenbach@chromium.org | 9aaa825 | 2014-09-04 10:39:50 +0000 | [diff] [blame] | 207 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 208 | Register name = StoreDescriptor::NameRegister(); |
| 209 | Register value = StoreDescriptor::ValueRegister(); |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 210 | Generate_DebugBreakCallHelper( |
machenbach@chromium.org | 70d29e1 | 2014-07-11 07:33:43 +0000 | [diff] [blame] | 211 | masm, receiver.bit() | name.bit() | value.bit(), 0, false); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 215 | void DebugCodegen::GenerateCompareNilICDebugBreak(MacroAssembler* masm) { |
danno@chromium.org | f005df6 | 2013-04-30 16:36:45 +0000 | [diff] [blame] | 216 | // Register state for CompareNil IC |
| 217 | // ----------- S t a t e ------------- |
| 218 | // -- eax : value |
| 219 | // ----------------------------------- |
| 220 | Generate_DebugBreakCallHelper(masm, eax.bit(), 0, false); |
| 221 | } |
| 222 | |
| 223 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 224 | void DebugCodegen::GenerateReturnDebugBreak(MacroAssembler* masm) { |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 225 | // Register state just before return from JS function (from codegen-ia32.cc). |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 226 | // ----------- S t a t e ------------- |
| 227 | // -- eax: return value |
| 228 | // ----------------------------------- |
| 229 | Generate_DebugBreakCallHelper(masm, eax.bit(), 0, true); |
| 230 | } |
| 231 | |
| 232 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 233 | void DebugCodegen::GenerateCallFunctionStubDebugBreak(MacroAssembler* masm) { |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 234 | // Register state for CallFunctionStub (from code-stubs-ia32.cc). |
| 235 | // ----------- S t a t e ------------- |
| 236 | // -- edi: function |
| 237 | // ----------------------------------- |
| 238 | Generate_DebugBreakCallHelper(masm, edi.bit(), 0, false); |
| 239 | } |
| 240 | |
| 241 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 242 | void DebugCodegen::GenerateCallConstructStubDebugBreak(MacroAssembler* masm) { |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 243 | // Register state for CallConstructStub (from code-stubs-ia32.cc). |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 244 | // eax is the actual number of arguments not encoded as a smi see comment |
| 245 | // above IC call. |
| 246 | // ----------- S t a t e ------------- |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 247 | // -- eax: number of arguments (not smi) |
| 248 | // -- edi: constructor function |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 249 | // ----------------------------------- |
| 250 | // The number of arguments in eax is not smi encoded. |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 251 | Generate_DebugBreakCallHelper(masm, edi.bit(), eax.bit(), false); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 255 | void DebugCodegen::GenerateCallConstructStubRecordDebugBreak( |
| 256 | MacroAssembler* masm) { |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 257 | // Register state for CallConstructStub (from code-stubs-ia32.cc). |
| 258 | // eax is the actual number of arguments not encoded as a smi see comment |
| 259 | // above IC call. |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 260 | // ----------- S t a t e ------------- |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 261 | // -- eax: number of arguments (not smi) |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 262 | // -- ebx: feedback array |
| 263 | // -- edx: feedback slot (smi) |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 264 | // -- edi: constructor function |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 265 | // ----------------------------------- |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 266 | // The number of arguments in eax is not smi encoded. |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 267 | Generate_DebugBreakCallHelper(masm, ebx.bit() | edx.bit() | edi.bit(), |
| 268 | eax.bit(), false); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 272 | void DebugCodegen::GenerateSlot(MacroAssembler* masm) { |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 273 | // Generate enough nop's to make space for a call instruction. |
| 274 | Label check_codesize; |
| 275 | __ bind(&check_codesize); |
| 276 | __ RecordDebugBreakSlot(); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 277 | __ Nop(Assembler::kDebugBreakSlotLength); |
machenbach@chromium.org | e3c177a | 2014-08-05 00:05:55 +0000 | [diff] [blame] | 278 | DCHECK_EQ(Assembler::kDebugBreakSlotLength, |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 279 | masm->SizeOfCodeGeneratedSince(&check_codesize)); |
| 280 | } |
| 281 | |
| 282 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 283 | void DebugCodegen::GenerateSlotDebugBreak(MacroAssembler* masm) { |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 284 | // In the places where a debug break slot is inserted no registers can contain |
| 285 | // object pointers. |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 286 | Generate_DebugBreakCallHelper(masm, 0, 0, true); |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 290 | void DebugCodegen::GeneratePlainReturnLiveEdit(MacroAssembler* masm) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 291 | masm->ret(0); |
| 292 | } |
| 293 | |
vegorov@chromium.org | 2356e6f | 2010-06-09 09:38:56 +0000 | [diff] [blame] | 294 | |
machenbach@chromium.org | d06b926 | 2014-05-28 06:48:05 +0000 | [diff] [blame] | 295 | void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 296 | ExternalReference restarter_frame_function_slot = |
machenbach@chromium.org | fb547e0 | 2014-05-23 00:04:50 +0000 | [diff] [blame] | 297 | ExternalReference::debug_restarter_frame_function_pointer_address( |
| 298 | masm->isolate()); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 299 | __ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0)); |
| 300 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 301 | // We do not know our frame height, but set esp based on ebp. |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 302 | __ lea(esp, Operand(ebp, -1 * kPointerSize)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 303 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 304 | __ pop(edi); // Function. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 305 | __ pop(ebp); |
| 306 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 307 | // Load context from the function. |
| 308 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 309 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 310 | // Get function code. |
| 311 | __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 312 | __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset)); |
| 313 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 314 | |
| 315 | // Re-run JSFunction, edi is function, esi is context. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 316 | __ jmp(edx); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 317 | } |
| 318 | |
machenbach@chromium.org | e31b63e | 2014-05-29 00:04:57 +0000 | [diff] [blame] | 319 | |
| 320 | const bool LiveEdit::kFrameDropperSupported = true; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 321 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 322 | #undef __ |
| 323 | |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 324 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 325 | |
| 326 | #endif // V8_TARGET_ARCH_IA32 |