1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "src/arm64/instrument-arm64.h"
10 Counter::Counter(const char* name, CounterType type)
11 : count_(0), enabled_(false), type_(type) {
13 strncpy(name_, name, kCounterNameMaxLength);
17 void Counter::Enable() {
22 void Counter::Disable() {
27 bool Counter::IsEnabled() {
32 void Counter::Increment() {
39 uint64_t Counter::count() {
40 uint64_t result = count_;
42 // If the counter is a Gauge, reset the count after reading.
49 const char* Counter::name() {
54 CounterType Counter::type() {
65 static const CounterDescriptor kCounterList[] = {
66 {"Instruction", Cumulative},
68 {"Move Immediate", Gauge},
69 {"Add/Sub DP", Gauge},
70 {"Logical DP", Gauge},
71 {"Other Int DP", Gauge},
74 {"Conditional Select", Gauge},
75 {"Conditional Compare", Gauge},
77 {"Unconditional Branch", Gauge},
78 {"Compare and Branch", Gauge},
79 {"Test and Branch", Gauge},
80 {"Conditional Branch", Gauge},
82 {"Load Integer", Gauge},
85 {"Load Literal", Gauge},
87 {"Store Integer", Gauge},
89 {"Store Pair", Gauge},
91 {"PC Addressing", Gauge},
97 Instrument::Instrument(const char* datafile, uint64_t sample_period)
98 : output_stream_(stderr), sample_period_(sample_period) {
100 // Set up the output stream. If datafile is non-NULL, use that file. If it
101 // can't be opened, or datafile is NULL, use stderr.
102 if (datafile != NULL) {
103 output_stream_ = fopen(datafile, "w");
104 if (output_stream_ == NULL) {
105 fprintf(stderr, "Can't open output file %s. Using stderr.\n", datafile);
106 output_stream_ = stderr;
110 static const int num_counters = ARRAY_SIZE(kCounterList);
112 // Dump an instrumentation description comment at the top of the file.
113 fprintf(output_stream_, "# counters=%d\n", num_counters);
114 fprintf(output_stream_, "# sample_period=%" PRIu64 "\n", sample_period_);
116 // Construct Counter objects from counter description array.
117 for (int i = 0; i < num_counters; i++) {
118 Counter* counter = new Counter(kCounterList[i].name, kCounterList[i].type);
119 counters_.push_back(counter);
126 Instrument::~Instrument() {
127 // Dump any remaining instruction data to the output file.
130 // Free all the counter objects.
131 std::list<Counter*>::iterator it;
132 for (it = counters_.begin(); it != counters_.end(); it++) {
136 if (output_stream_ != stderr) {
137 fclose(output_stream_);
142 void Instrument::Update() {
143 // Increment the instruction counter, and dump all counters if a sample period
145 static Counter* counter = GetCounter("Instruction");
146 DCHECK(counter->type() == Cumulative);
147 counter->Increment();
149 if (counter->IsEnabled() && (counter->count() % sample_period_) == 0) {
155 void Instrument::DumpCounters() {
156 // Iterate through the counter objects, dumping their values to the output
158 std::list<Counter*>::const_iterator it;
159 for (it = counters_.begin(); it != counters_.end(); it++) {
160 fprintf(output_stream_, "%" PRIu64 ",", (*it)->count());
162 fprintf(output_stream_, "\n");
163 fflush(output_stream_);
167 void Instrument::DumpCounterNames() {
168 // Iterate through the counter objects, dumping the counter names to the
170 std::list<Counter*>::const_iterator it;
171 for (it = counters_.begin(); it != counters_.end(); it++) {
172 fprintf(output_stream_, "%s,", (*it)->name());
174 fprintf(output_stream_, "\n");
175 fflush(output_stream_);
179 void Instrument::HandleInstrumentationEvent(unsigned event) {
181 case InstrumentStateEnable: Enable(); break;
182 case InstrumentStateDisable: Disable(); break;
183 default: DumpEventMarker(event);
188 void Instrument::DumpEventMarker(unsigned marker) {
189 // Dumpan event marker to the output stream as a specially formatted comment
191 static Counter* counter = GetCounter("Instruction");
193 fprintf(output_stream_, "# %c%c @ %" PRId64 "\n", marker & 0xff,
194 (marker >> 8) & 0xff, counter->count());
198 Counter* Instrument::GetCounter(const char* name) {
199 // Get a Counter object by name from the counter list.
200 std::list<Counter*>::const_iterator it;
201 for (it = counters_.begin(); it != counters_.end(); it++) {
202 if (strcmp((*it)->name(), name) == 0) {
207 // A Counter by that name does not exist: print an error message to stderr
208 // and the output file, and exit.
209 static const char* error_message =
210 "# Error: Unknown counter \"%s\". Exiting.\n";
211 fprintf(stderr, error_message, name);
212 fprintf(output_stream_, error_message, name);
217 void Instrument::Enable() {
218 std::list<Counter*>::iterator it;
219 for (it = counters_.begin(); it != counters_.end(); it++) {
225 void Instrument::Disable() {
226 std::list<Counter*>::iterator it;
227 for (it = counters_.begin(); it != counters_.end(); it++) {
233 void Instrument::VisitPCRelAddressing(Instruction* instr) {
235 static Counter* counter = GetCounter("PC Addressing");
236 counter->Increment();
240 void Instrument::VisitAddSubImmediate(Instruction* instr) {
242 static Counter* sp_counter = GetCounter("SP Adjust");
243 static Counter* add_sub_counter = GetCounter("Add/Sub DP");
244 if (((instr->Mask(AddSubOpMask) == SUB) ||
245 (instr->Mask(AddSubOpMask) == ADD)) &&
246 (instr->Rd() == 31) && (instr->Rn() == 31)) {
247 // Count adjustments to the C stack pointer caused by V8 needing two SPs.
248 sp_counter->Increment();
250 add_sub_counter->Increment();
255 void Instrument::VisitLogicalImmediate(Instruction* instr) {
257 static Counter* counter = GetCounter("Logical DP");
258 counter->Increment();
262 void Instrument::VisitMoveWideImmediate(Instruction* instr) {
264 static Counter* counter = GetCounter("Move Immediate");
266 if (instr->IsMovn() && (instr->Rd() == kZeroRegCode)) {
267 unsigned imm = instr->ImmMoveWide();
268 HandleInstrumentationEvent(imm);
270 counter->Increment();
275 void Instrument::VisitBitfield(Instruction* instr) {
277 static Counter* counter = GetCounter("Other Int DP");
278 counter->Increment();
282 void Instrument::VisitExtract(Instruction* instr) {
284 static Counter* counter = GetCounter("Other Int DP");
285 counter->Increment();
289 void Instrument::VisitUnconditionalBranch(Instruction* instr) {
291 static Counter* counter = GetCounter("Unconditional Branch");
292 counter->Increment();
296 void Instrument::VisitUnconditionalBranchToRegister(Instruction* instr) {
298 static Counter* counter = GetCounter("Unconditional Branch");
299 counter->Increment();
303 void Instrument::VisitCompareBranch(Instruction* instr) {
305 static Counter* counter = GetCounter("Compare and Branch");
306 counter->Increment();
310 void Instrument::VisitTestBranch(Instruction* instr) {
312 static Counter* counter = GetCounter("Test and Branch");
313 counter->Increment();
317 void Instrument::VisitConditionalBranch(Instruction* instr) {
319 static Counter* counter = GetCounter("Conditional Branch");
320 counter->Increment();
324 void Instrument::VisitSystem(Instruction* instr) {
326 static Counter* counter = GetCounter("Other");
327 counter->Increment();
331 void Instrument::VisitException(Instruction* instr) {
333 static Counter* counter = GetCounter("Other");
334 counter->Increment();
338 void Instrument::InstrumentLoadStorePair(Instruction* instr) {
339 static Counter* load_pair_counter = GetCounter("Load Pair");
340 static Counter* store_pair_counter = GetCounter("Store Pair");
341 if (instr->Mask(LoadStorePairLBit) != 0) {
342 load_pair_counter->Increment();
344 store_pair_counter->Increment();
349 void Instrument::VisitLoadStorePairPostIndex(Instruction* instr) {
351 InstrumentLoadStorePair(instr);
355 void Instrument::VisitLoadStorePairOffset(Instruction* instr) {
357 InstrumentLoadStorePair(instr);
361 void Instrument::VisitLoadStorePairPreIndex(Instruction* instr) {
363 InstrumentLoadStorePair(instr);
367 void Instrument::VisitLoadStorePairNonTemporal(Instruction* instr) {
369 InstrumentLoadStorePair(instr);
373 void Instrument::VisitLoadLiteral(Instruction* instr) {
375 static Counter* counter = GetCounter("Load Literal");
376 counter->Increment();
380 void Instrument::InstrumentLoadStore(Instruction* instr) {
381 static Counter* load_int_counter = GetCounter("Load Integer");
382 static Counter* store_int_counter = GetCounter("Store Integer");
383 static Counter* load_fp_counter = GetCounter("Load FP");
384 static Counter* store_fp_counter = GetCounter("Store FP");
386 switch (instr->Mask(LoadStoreOpMask)) {
387 case STRB_w: // Fall through.
388 case STRH_w: // Fall through.
389 case STR_w: // Fall through.
390 case STR_x: store_int_counter->Increment(); break;
391 case STR_s: // Fall through.
392 case STR_d: store_fp_counter->Increment(); break;
393 case LDRB_w: // Fall through.
394 case LDRH_w: // Fall through.
395 case LDR_w: // Fall through.
396 case LDR_x: // Fall through.
397 case LDRSB_x: // Fall through.
398 case LDRSH_x: // Fall through.
399 case LDRSW_x: // Fall through.
400 case LDRSB_w: // Fall through.
401 case LDRSH_w: load_int_counter->Increment(); break;
402 case LDR_s: // Fall through.
403 case LDR_d: load_fp_counter->Increment(); break;
404 default: UNREACHABLE();
409 void Instrument::VisitLoadStoreUnscaledOffset(Instruction* instr) {
411 InstrumentLoadStore(instr);
415 void Instrument::VisitLoadStorePostIndex(Instruction* instr) {
417 InstrumentLoadStore(instr);
421 void Instrument::VisitLoadStorePreIndex(Instruction* instr) {
423 InstrumentLoadStore(instr);
427 void Instrument::VisitLoadStoreRegisterOffset(Instruction* instr) {
429 InstrumentLoadStore(instr);
433 void Instrument::VisitLoadStoreUnsignedOffset(Instruction* instr) {
435 InstrumentLoadStore(instr);
439 void Instrument::VisitLogicalShifted(Instruction* instr) {
441 static Counter* counter = GetCounter("Logical DP");
442 counter->Increment();
446 void Instrument::VisitAddSubShifted(Instruction* instr) {
448 static Counter* counter = GetCounter("Add/Sub DP");
449 counter->Increment();
453 void Instrument::VisitAddSubExtended(Instruction* instr) {
455 static Counter* sp_counter = GetCounter("SP Adjust");
456 static Counter* add_sub_counter = GetCounter("Add/Sub DP");
457 if (((instr->Mask(AddSubOpMask) == SUB) ||
458 (instr->Mask(AddSubOpMask) == ADD)) &&
459 (instr->Rd() == 31) && (instr->Rn() == 31)) {
460 // Count adjustments to the C stack pointer caused by V8 needing two SPs.
461 sp_counter->Increment();
463 add_sub_counter->Increment();
468 void Instrument::VisitAddSubWithCarry(Instruction* instr) {
470 static Counter* counter = GetCounter("Add/Sub DP");
471 counter->Increment();
475 void Instrument::VisitConditionalCompareRegister(Instruction* instr) {
477 static Counter* counter = GetCounter("Conditional Compare");
478 counter->Increment();
482 void Instrument::VisitConditionalCompareImmediate(Instruction* instr) {
484 static Counter* counter = GetCounter("Conditional Compare");
485 counter->Increment();
489 void Instrument::VisitConditionalSelect(Instruction* instr) {
491 static Counter* counter = GetCounter("Conditional Select");
492 counter->Increment();
496 void Instrument::VisitDataProcessing1Source(Instruction* instr) {
498 static Counter* counter = GetCounter("Other Int DP");
499 counter->Increment();
503 void Instrument::VisitDataProcessing2Source(Instruction* instr) {
505 static Counter* counter = GetCounter("Other Int DP");
506 counter->Increment();
510 void Instrument::VisitDataProcessing3Source(Instruction* instr) {
512 static Counter* counter = GetCounter("Other Int DP");
513 counter->Increment();
517 void Instrument::VisitFPCompare(Instruction* instr) {
519 static Counter* counter = GetCounter("FP DP");
520 counter->Increment();
524 void Instrument::VisitFPConditionalCompare(Instruction* instr) {
526 static Counter* counter = GetCounter("Conditional Compare");
527 counter->Increment();
531 void Instrument::VisitFPConditionalSelect(Instruction* instr) {
533 static Counter* counter = GetCounter("Conditional Select");
534 counter->Increment();
538 void Instrument::VisitFPImmediate(Instruction* instr) {
540 static Counter* counter = GetCounter("FP DP");
541 counter->Increment();
545 void Instrument::VisitFPDataProcessing1Source(Instruction* instr) {
547 static Counter* counter = GetCounter("FP DP");
548 counter->Increment();
552 void Instrument::VisitFPDataProcessing2Source(Instruction* instr) {
554 static Counter* counter = GetCounter("FP DP");
555 counter->Increment();
559 void Instrument::VisitFPDataProcessing3Source(Instruction* instr) {
561 static Counter* counter = GetCounter("FP DP");
562 counter->Increment();
566 void Instrument::VisitFPIntegerConvert(Instruction* instr) {
568 static Counter* counter = GetCounter("FP DP");
569 counter->Increment();
573 void Instrument::VisitFPFixedPointConvert(Instruction* instr) {
575 static Counter* counter = GetCounter("FP DP");
576 counter->Increment();
580 void Instrument::VisitUnallocated(Instruction* instr) {
582 static Counter* counter = GetCounter("Other");
583 counter->Increment();
587 void Instrument::VisitUnimplemented(Instruction* instr) {
589 static Counter* counter = GetCounter("Other");
590 counter->Increment();
594 } } // namespace v8::internal