// Copyright 2011 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "v8.h"
-
-#include "codegen.h"
-#include "deoptimizer.h"
-#include "full-codegen.h"
-#include "safepoint-table.h"
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/codegen.h"
+#include "src/deoptimizer.h"
+#include "src/full-codegen.h"
+#include "src/safepoint-table.h"
namespace v8 {
namespace internal {
// code patching below, and is not needed any more.
code->InvalidateRelocation();
- // For each LLazyBailout instruction insert a call to the corresponding
- // deoptimization entry.
+ if (FLAG_zap_code_space) {
+ // Fail hard and early if we enter this code object again.
+ byte* pointer = code->FindCodeAgeSequence();
+ if (pointer != NULL) {
+ pointer += kNoCodeAgeSequenceLength;
+ } else {
+ pointer = code->instruction_start();
+ }
+ CodePatcher patcher(pointer, 1);
+ patcher.masm()->break_(0xCC);
+
+ DeoptimizationInputData* data =
+ DeoptimizationInputData::cast(code->deoptimization_data());
+ int osr_offset = data->OsrPcOffset()->value();
+ if (osr_offset > 0) {
+ CodePatcher osr_patcher(code->instruction_start() + osr_offset, 1);
+ osr_patcher.masm()->break_(0xCC);
+ }
+ }
+
DeoptimizationInputData* deopt_data =
DeoptimizationInputData::cast(code->deoptimization_data());
#ifdef DEBUG
Address prev_call_address = NULL;
#endif
+ // For each LLazyBailout instruction insert a call to the corresponding
+ // deoptimization entry.
for (int i = 0; i < deopt_data->DeoptCount(); i++) {
if (deopt_data->Pc(i)->value() == -1) continue;
Address call_address = code_start_address + deopt_data->Pc(i)->value();
int call_size_in_bytes = MacroAssembler::CallSize(deopt_entry,
RelocInfo::NONE32);
int call_size_in_words = call_size_in_bytes / Assembler::kInstrSize;
- ASSERT(call_size_in_bytes % Assembler::kInstrSize == 0);
- ASSERT(call_size_in_bytes <= patch_size());
+ DCHECK(call_size_in_bytes % Assembler::kInstrSize == 0);
+ DCHECK(call_size_in_bytes <= patch_size());
CodePatcher patcher(call_address, call_size_in_words);
patcher.masm()->Call(deopt_entry, RelocInfo::NONE32);
- ASSERT(prev_call_address == NULL ||
+ DCHECK(prev_call_address == NULL ||
call_address >= prev_call_address + patch_size());
- ASSERT(call_address + patch_size() <= code->instruction_end());
+ DCHECK(call_address + patch_size() <= code->instruction_end());
#ifdef DEBUG
prev_call_address = call_address;
void Deoptimizer::SetPlatformCompiledStubRegisters(
- FrameDescription* output_frame, CodeStubInterfaceDescriptor* descriptor) {
- ApiFunction function(descriptor->deoptimization_handler_);
+ FrameDescription* output_frame, CodeStubDescriptor* descriptor) {
+ ApiFunction function(descriptor->deoptimization_handler());
ExternalReference xref(&function, ExternalReference::BUILTIN_CALL, isolate_);
intptr_t handler = reinterpret_cast<intptr_t>(xref.address());
int params = descriptor->GetHandlerParameterCount();
}
-Code* Deoptimizer::NotifyStubFailureBuiltin() {
- return isolate_->builtins()->builtin(Builtins::kNotifyStubFailureSaveDoubles);
-}
-
-
#define __ masm()->
__ lw(a1, MemOperand(v0, Deoptimizer::input_offset()));
// Copy core registers into FrameDescription::registers_[kNumRegisters].
- ASSERT(Register::kNumRegisters == kNumberOfRegisters);
+ DCHECK(Register::kNumRegisters == kNumberOfRegisters);
for (int i = 0; i < kNumberOfRegisters; i++) {
int offset = (i * kPointerSize) + FrameDescription::registers_offset();
if ((saved_regs & (1 << i)) != 0) {
__ Addu(a3, a1, Operand(FrameDescription::frame_content_offset()));
Label pop_loop;
Label pop_loop_header;
- __ Branch(&pop_loop_header);
+ __ BranchShort(&pop_loop_header);
__ bind(&pop_loop);
__ pop(t0);
__ sw(t0, MemOperand(a3, 0));
__ addiu(a3, a3, sizeof(uint32_t));
__ bind(&pop_loop_header);
- __ Branch(&pop_loop, ne, a2, Operand(sp));
+ __ BranchShort(&pop_loop, ne, a2, Operand(sp));
// Compute the output frame in the deoptimizer.
__ push(a0); // Preserve deoptimizer object across call.
__ lw(t3, MemOperand(t2, FrameDescription::frame_content_offset()));
__ push(t3);
__ bind(&inner_loop_header);
- __ Branch(&inner_push_loop, ne, a3, Operand(zero_reg));
+ __ BranchShort(&inner_push_loop, ne, a3, Operand(zero_reg));
__ Addu(t0, t0, Operand(kPointerSize));
__ bind(&outer_loop_header);
- __ Branch(&outer_push_loop, lt, t0, Operand(a1));
+ __ BranchShort(&outer_push_loop, lt, t0, Operand(a1));
__ lw(a1, MemOperand(a0, Deoptimizer::input_offset()));
for (int i = 0; i < FPURegister::kMaxNumAllocatableRegisters; ++i) {
// Technically restoring 'at' should work unless zero_reg is also restored
// but it's safer to check for this.
- ASSERT(!(at.bit() & restored_regs));
+ DCHECK(!(at.bit() & restored_regs));
// Restore the registers from the last output frame.
__ mov(at, a2);
for (int i = kNumberOfRegisters - 1; i >= 0; i--) {
// Maximum size of a table entry generated below.
-const int Deoptimizer::table_entry_size_ = 7 * Assembler::kInstrSize;
+const int Deoptimizer::table_entry_size_ = 2 * Assembler::kInstrSize;
void Deoptimizer::TableEntryGenerator::GeneratePrologue() {
Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm());
// Create a sequence of deoptimization entries.
// Note that registers are still live when jumping to an entry.
- Label table_start;
+ Label table_start, done, done_special, trampoline_jump;
__ bind(&table_start);
- for (int i = 0; i < count(); i++) {
- Label start;
- __ bind(&start);
- __ addiu(sp, sp, -1 * kPointerSize);
- // Jump over the remaining deopt entries (including this one).
- // This code is always reached by calling Jump, which puts the target (label
- // start) into t9.
- const int remaining_entries = (count() - i) * table_entry_size_;
- __ Addu(t9, t9, remaining_entries);
- // 'at' was clobbered so we can only load the current entry value here.
- __ li(at, i);
- __ jr(t9); // Expose delay slot.
- __ sw(at, MemOperand(sp, 0 * kPointerSize)); // In the delay slot.
-
- // Pad the rest of the code.
- while (table_entry_size_ > (masm()->SizeOfCodeGeneratedSince(&start))) {
- __ nop();
+ int kMaxEntriesBranchReach = (1 << (kImm16Bits - 2))/
+ (table_entry_size_ / Assembler::kInstrSize);
+
+ if (count() <= kMaxEntriesBranchReach) {
+ // Common case.
+ for (int i = 0; i < count(); i++) {
+ Label start;
+ __ bind(&start);
+ DCHECK(is_int16(i));
+ __ Branch(USE_DELAY_SLOT, &done); // Expose delay slot.
+ __ li(at, i); // In the delay slot.
+
+ DCHECK_EQ(table_entry_size_, masm()->SizeOfCodeGeneratedSince(&start));
}
- ASSERT_EQ(table_entry_size_, masm()->SizeOfCodeGeneratedSince(&start));
- }
+ DCHECK_EQ(masm()->SizeOfCodeGeneratedSince(&table_start),
+ count() * table_entry_size_);
+ __ bind(&done);
+ __ Push(at);
+ } else {
+ // Uncommon case, the branch cannot reach.
+ // Create mini trampoline and adjust id constants to get proper value at
+ // the end of table.
+ for (int i = kMaxEntriesBranchReach; i > 1; i--) {
+ Label start;
+ __ bind(&start);
+ DCHECK(is_int16(i));
+ __ Branch(USE_DELAY_SLOT, &trampoline_jump); // Expose delay slot.
+ __ li(at, - i); // In the delay slot.
+ DCHECK_EQ(table_entry_size_, masm()->SizeOfCodeGeneratedSince(&start));
+ }
+ // Entry with id == kMaxEntriesBranchReach - 1.
+ __ bind(&trampoline_jump);
+ __ Branch(USE_DELAY_SLOT, &done_special);
+ __ li(at, -1);
+
+ for (int i = kMaxEntriesBranchReach ; i < count(); i++) {
+ Label start;
+ __ bind(&start);
+ DCHECK(is_int16(i));
+ __ Branch(USE_DELAY_SLOT, &done); // Expose delay slot.
+ __ li(at, i); // In the delay slot.
+ }
- ASSERT_EQ(masm()->SizeOfCodeGeneratedSince(&table_start),
- count() * table_entry_size_);
+ DCHECK_EQ(masm()->SizeOfCodeGeneratedSince(&table_start),
+ count() * table_entry_size_);
+ __ bind(&done_special);
+ __ addiu(at, at, kMaxEntriesBranchReach);
+ __ bind(&done);
+ __ Push(at);
+ }
}
}
+void FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) {
+ // No out-of-line constant pool support.
+ UNREACHABLE();
+}
+
+
#undef __
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