1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
|
// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_CODEGEN_OPTIMIZED_COMPILATION_INFO_H_
#define V8_CODEGEN_OPTIMIZED_COMPILATION_INFO_H_
#include <memory>
#include "src/codegen/bailout-reason.h"
#include "src/codegen/source-position-table.h"
#include "src/codegen/tick-counter.h"
#include "src/common/globals.h"
#include "src/execution/frames.h"
#include "src/handles/handles.h"
#include "src/objects/objects.h"
#include "src/utils/utils.h"
#include "src/utils/vector.h"
namespace v8 {
namespace tracing {
class TracedValue;
}
namespace internal {
class DeferredHandles;
class FunctionLiteral;
class Isolate;
class JavaScriptFrame;
class JSGlobalObject;
class Zone;
namespace wasm {
struct WasmCompilationResult;
}
// OptimizedCompilationInfo encapsulates the information needed to compile
// optimized code for a given function, and the results of the optimized
// compilation.
class V8_EXPORT_PRIVATE OptimizedCompilationInfo final {
public:
// Various configuration flags for a compilation, as well as some properties
// of the compiled code produced by a compilation.
enum Flag {
kFunctionContextSpecializing = 1 << 0,
kInliningEnabled = 1 << 1,
kDisableFutureOptimization = 1 << 2,
kSplittingEnabled = 1 << 3,
kSourcePositionsEnabled = 1 << 4,
kBailoutOnUninitialized = 1 << 5,
kLoopPeelingEnabled = 1 << 6,
kUntrustedCodeMitigations = 1 << 7,
kSwitchJumpTableEnabled = 1 << 8,
kCalledWithCodeStartRegister = 1 << 9,
kPoisonRegisterArguments = 1 << 10,
kAllocationFoldingEnabled = 1 << 11,
kAnalyzeEnvironmentLiveness = 1 << 12,
kTraceTurboJson = 1 << 13,
kTraceTurboGraph = 1 << 14,
kTraceTurboScheduled = 1 << 15,
kTraceTurboAllocation = 1 << 16,
kTraceHeapBroker = 1 << 17,
kWasmRuntimeExceptionSupport = 1 << 18,
kTurboControlFlowAwareAllocation = 1 << 19,
kTurboPreprocessRanges = 1 << 20,
kConcurrentInlining = 1 << 21,
};
// Construct a compilation info for optimized compilation.
OptimizedCompilationInfo(Zone* zone, Isolate* isolate,
Handle<SharedFunctionInfo> shared,
Handle<JSFunction> closure);
// Construct a compilation info for stub compilation, Wasm, and testing.
OptimizedCompilationInfo(Vector<const char> debug_name, Zone* zone,
Code::Kind code_kind);
~OptimizedCompilationInfo();
Zone* zone() { return zone_; }
bool is_osr() const { return !osr_offset_.IsNone(); }
Handle<SharedFunctionInfo> shared_info() const { return shared_info_; }
bool has_shared_info() const { return !shared_info().is_null(); }
Handle<BytecodeArray> bytecode_array() const { return bytecode_array_; }
bool has_bytecode_array() const { return !bytecode_array_.is_null(); }
Handle<JSFunction> closure() const { return closure_; }
Handle<Code> code() const { return code_; }
Code::Kind code_kind() const { return code_kind_; }
int32_t builtin_index() const { return builtin_index_; }
void set_builtin_index(int32_t index) { builtin_index_ = index; }
BailoutId osr_offset() const { return osr_offset_; }
JavaScriptFrame* osr_frame() const { return osr_frame_; }
// Flags used by optimized compilation.
void MarkAsConcurrentInlining() { SetFlag(kConcurrentInlining); }
bool is_concurrent_inlining() const { return GetFlag(kConcurrentInlining); }
void MarkAsTurboControlFlowAwareAllocation() {
SetFlag(kTurboControlFlowAwareAllocation);
}
bool is_turbo_control_flow_aware_allocation() const {
return GetFlag(kTurboControlFlowAwareAllocation);
}
void MarkAsTurboPreprocessRanges() { SetFlag(kTurboPreprocessRanges); }
bool is_turbo_preprocess_ranges() const {
return GetFlag(kTurboPreprocessRanges);
}
void MarkAsFunctionContextSpecializing() {
SetFlag(kFunctionContextSpecializing);
}
bool is_function_context_specializing() const {
return GetFlag(kFunctionContextSpecializing);
}
void MarkAsSourcePositionsEnabled() { SetFlag(kSourcePositionsEnabled); }
bool is_source_positions_enabled() const {
return GetFlag(kSourcePositionsEnabled);
}
void MarkAsInliningEnabled() { SetFlag(kInliningEnabled); }
bool is_inlining_enabled() const { return GetFlag(kInliningEnabled); }
void SetPoisoningMitigationLevel(PoisoningMitigationLevel poisoning_level) {
poisoning_level_ = poisoning_level;
}
PoisoningMitigationLevel GetPoisoningMitigationLevel() const {
return poisoning_level_;
}
void MarkAsSplittingEnabled() { SetFlag(kSplittingEnabled); }
bool is_splitting_enabled() const { return GetFlag(kSplittingEnabled); }
void MarkAsBailoutOnUninitialized() { SetFlag(kBailoutOnUninitialized); }
bool is_bailout_on_uninitialized() const {
return GetFlag(kBailoutOnUninitialized);
}
void MarkAsLoopPeelingEnabled() { SetFlag(kLoopPeelingEnabled); }
bool is_loop_peeling_enabled() const { return GetFlag(kLoopPeelingEnabled); }
bool has_untrusted_code_mitigations() const {
return GetFlag(kUntrustedCodeMitigations);
}
bool switch_jump_table_enabled() const {
return GetFlag(kSwitchJumpTableEnabled);
}
bool called_with_code_start_register() const {
bool enabled = GetFlag(kCalledWithCodeStartRegister);
return enabled;
}
void MarkAsPoisoningRegisterArguments() {
DCHECK(has_untrusted_code_mitigations());
SetFlag(kPoisonRegisterArguments);
}
bool is_poisoning_register_arguments() const {
bool enabled = GetFlag(kPoisonRegisterArguments);
DCHECK_IMPLIES(enabled, has_untrusted_code_mitigations());
DCHECK_IMPLIES(enabled, called_with_code_start_register());
return enabled;
}
void MarkAsAllocationFoldingEnabled() { SetFlag(kAllocationFoldingEnabled); }
bool is_allocation_folding_enabled() const {
return GetFlag(kAllocationFoldingEnabled);
}
void MarkAsAnalyzeEnvironmentLiveness() {
SetFlag(kAnalyzeEnvironmentLiveness);
}
bool is_analyze_environment_liveness() const {
return GetFlag(kAnalyzeEnvironmentLiveness);
}
void SetWasmRuntimeExceptionSupport() {
SetFlag(kWasmRuntimeExceptionSupport);
}
bool wasm_runtime_exception_support() {
return GetFlag(kWasmRuntimeExceptionSupport);
}
bool trace_turbo_json_enabled() const { return GetFlag(kTraceTurboJson); }
bool trace_turbo_graph_enabled() const { return GetFlag(kTraceTurboGraph); }
bool trace_turbo_allocation_enabled() const {
return GetFlag(kTraceTurboAllocation);
}
bool trace_turbo_scheduled_enabled() const {
return GetFlag(kTraceTurboScheduled);
}
bool trace_heap_broker_enabled() const { return GetFlag(kTraceHeapBroker); }
// Code getters and setters.
void SetCode(Handle<Code> code) { code_ = code; }
void SetWasmCompilationResult(std::unique_ptr<wasm::WasmCompilationResult>);
std::unique_ptr<wasm::WasmCompilationResult> ReleaseWasmCompilationResult();
bool has_context() const;
Context context() const;
bool has_native_context() const;
NativeContext native_context() const;
bool has_global_object() const;
JSGlobalObject global_object() const;
// Accessors for the different compilation modes.
bool IsOptimizing() const { return code_kind() == Code::OPTIMIZED_FUNCTION; }
bool IsWasm() const { return code_kind() == Code::WASM_FUNCTION; }
bool IsNotOptimizedFunctionOrWasmFunction() const {
return code_kind() != Code::OPTIMIZED_FUNCTION &&
code_kind() != Code::WASM_FUNCTION;
}
void SetOptimizingForOsr(BailoutId osr_offset, JavaScriptFrame* osr_frame) {
DCHECK(IsOptimizing());
osr_offset_ = osr_offset;
osr_frame_ = osr_frame;
}
void set_deferred_handles(std::unique_ptr<DeferredHandles> deferred_handles);
void ReopenHandlesInNewHandleScope(Isolate* isolate);
void AbortOptimization(BailoutReason reason);
void RetryOptimization(BailoutReason reason);
BailoutReason bailout_reason() const { return bailout_reason_; }
bool is_disable_future_optimization() const {
return GetFlag(kDisableFutureOptimization);
}
int optimization_id() const {
DCHECK(IsOptimizing());
return optimization_id_;
}
unsigned inlined_bytecode_size() const { return inlined_bytecode_size_; }
void set_inlined_bytecode_size(unsigned size) {
inlined_bytecode_size_ = size;
}
struct InlinedFunctionHolder {
Handle<SharedFunctionInfo> shared_info;
Handle<BytecodeArray> bytecode_array; // Explicit to prevent flushing.
InliningPosition position;
InlinedFunctionHolder(Handle<SharedFunctionInfo> inlined_shared_info,
Handle<BytecodeArray> inlined_bytecode,
SourcePosition pos);
void RegisterInlinedFunctionId(size_t inlined_function_id) {
position.inlined_function_id = static_cast<int>(inlined_function_id);
}
};
using InlinedFunctionList = std::vector<InlinedFunctionHolder>;
InlinedFunctionList& inlined_functions() { return inlined_functions_; }
// Returns the inlining id for source position tracking.
int AddInlinedFunction(Handle<SharedFunctionInfo> inlined_function,
Handle<BytecodeArray> inlined_bytecode,
SourcePosition pos);
std::unique_ptr<char[]> GetDebugName() const;
StackFrame::Type GetOutputStackFrameType() const;
const char* trace_turbo_filename() const {
return trace_turbo_filename_.get();
}
void set_trace_turbo_filename(std::unique_ptr<char[]> filename) {
trace_turbo_filename_ = std::move(filename);
}
TickCounter& tick_counter() { return tick_counter_; }
private:
OptimizedCompilationInfo(Code::Kind code_kind, Zone* zone);
void ConfigureFlags();
void SetFlag(Flag flag) { flags_ |= flag; }
bool GetFlag(Flag flag) const { return (flags_ & flag) != 0; }
void SetTracingFlags(bool passes_filter);
// Compilation flags.
unsigned flags_ = 0;
PoisoningMitigationLevel poisoning_level_ =
PoisoningMitigationLevel::kDontPoison;
Code::Kind code_kind_;
int32_t builtin_index_ = -1;
// We retain a reference the bytecode array specifically to ensure it doesn't
// get flushed while we are optimizing the code.
Handle<BytecodeArray> bytecode_array_;
Handle<SharedFunctionInfo> shared_info_;
Handle<JSFunction> closure_;
// The compiled code.
Handle<Code> code_;
// The WebAssembly compilation result, not published in the NativeModule yet.
std::unique_ptr<wasm::WasmCompilationResult> wasm_compilation_result_;
// Entry point when compiling for OSR, {BailoutId::None} otherwise.
BailoutId osr_offset_ = BailoutId::None();
// The zone from which the compilation pipeline working on this
// OptimizedCompilationInfo allocates.
Zone* zone_;
std::unique_ptr<DeferredHandles> deferred_handles_;
BailoutReason bailout_reason_ = BailoutReason::kNoReason;
InlinedFunctionList inlined_functions_;
int optimization_id_ = -1;
unsigned inlined_bytecode_size_ = 0;
// The current OSR frame for specialization or {nullptr}.
JavaScriptFrame* osr_frame_ = nullptr;
Vector<const char> debug_name_;
std::unique_ptr<char[]> trace_turbo_filename_;
TickCounter tick_counter_;
DISALLOW_COPY_AND_ASSIGN(OptimizedCompilationInfo);
};
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_OPTIMIZED_COMPILATION_INFO_H_
|