1 /*===-- InstrProfData.inc - instr profiling runtime structures -*- C++ -*-=== *\
3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 |* See https://llvm.org/LICENSE.txt for license information.
5 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 \*===----------------------------------------------------------------------===*/
9 * This is the main file that defines all the data structure, signature,
10 * constant literals that are shared across profiling runtime library,
11 * compiler (instrumentation), and host tools (reader/writer). The entities
12 * defined in this file affect the profile runtime ABI, the raw profile format,
15 * The file has two identical copies. The primary copy lives in LLVM and
16 * the other one sits in compiler-rt/lib/profile directory. To make changes
17 * in this file, first modify the primary copy and copy it over to compiler-rt.
18 * Testing of any change in this file can start only after the two copies are
21 * The first part of the file includes macros that defines types, names, and
22 * initializers for the member fields of the core data structures. The field
23 * declarations for one structure is enabled by defining the field activation
24 * macro associated with that structure. Only one field activation record
25 * can be defined at one time and the rest definitions will be filtered out by
28 * Examples of how the template is used to instantiate structure definition:
29 * 1. To declare a structure:
32 * #define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) \
34 * #include "llvm/ProfileData/InstrProfData.inc"
37 * 2. To construct LLVM type arrays for the struct type:
39 * Type *DataTypes[] = {
40 * #define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) \
42 * #include "llvm/ProfileData/InstrProfData.inc"
45 * 4. To construct constant array for the initializers:
46 * #define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) \
48 * Constant *ConstantVals[] = {
49 * #include "llvm/ProfileData/InstrProfData.inc"
53 * The second part of the file includes definitions all other entities that
54 * are related to runtime ABI and format. When no field activation macro is
55 * defined, this file can be included to introduce the definitions.
57 \*===----------------------------------------------------------------------===*/
59 /* Functions marked with INSTR_PROF_VISIBILITY must have hidden visibility in
60 * the compiler runtime. */
61 #ifndef INSTR_PROF_VISIBILITY
62 #define INSTR_PROF_VISIBILITY
65 /* INSTR_PROF_DATA start. */
66 /* Definition of member fields of the per-function control structure. */
67 #ifndef INSTR_PROF_DATA
68 #define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer)
70 #define INSTR_PROF_DATA_DEFINED
72 INSTR_PROF_DATA(const uint64_t, llvm::Type::getInt64Ty(Ctx), NameRef, \
73 ConstantInt::get(llvm::Type::getInt64Ty(Ctx), \
74 IndexedInstrProf::ComputeHash(getPGOFuncNameVarInitializer(Inc->getName()))))
75 INSTR_PROF_DATA(const uint64_t, llvm::Type::getInt64Ty(Ctx), FuncHash, \
76 ConstantInt::get(llvm::Type::getInt64Ty(Ctx), \
77 Inc->getHash()->getZExtValue()))
78 INSTR_PROF_DATA(const IntPtrT, IntPtrTy, CounterPtr, RelativeCounterPtr)
79 INSTR_PROF_DATA(const IntPtrT, IntPtrTy, BitmapPtr, RelativeBitmapPtr)
80 /* This is used to map function pointers for the indirect call targets to
81 * function name hashes during the conversion from raw to merged profile
84 INSTR_PROF_DATA(const IntPtrT, llvm::Type::getInt8PtrTy(Ctx), FunctionPointer, \
86 INSTR_PROF_DATA(IntPtrT, llvm::Type::getInt8PtrTy(Ctx), Values, \
88 INSTR_PROF_DATA(const uint32_t, llvm::Type::getInt32Ty(Ctx), NumCounters, \
89 ConstantInt::get(llvm::Type::getInt32Ty(Ctx), NumCounters))
90 INSTR_PROF_DATA(const uint16_t, Int16ArrayTy, NumValueSites[IPVK_Last+1], \
91 ConstantArray::get(Int16ArrayTy, Int16ArrayVals)) \
92 INSTR_PROF_DATA(const uint32_t, llvm::Type::getInt32Ty(Ctx), NumBitmapBytes, \
93 ConstantInt::get(llvm::Type::getInt32Ty(Ctx), NumBitmapBytes))
94 #undef INSTR_PROF_DATA
95 /* INSTR_PROF_DATA end. */
98 /* This is an internal data structure used by value profiler. It
99 * is defined here to allow serialization code sharing by LLVM
100 * to be used in unit test.
102 * typedef struct ValueProfNode {
103 * // InstrProfValueData VData;
106 * struct ValueProfNode *Next;
109 /* INSTR_PROF_VALUE_NODE start. */
110 #ifndef INSTR_PROF_VALUE_NODE
111 #define INSTR_PROF_VALUE_NODE(Type, LLVMType, Name, Initializer)
113 #define INSTR_PROF_DATA_DEFINED
115 INSTR_PROF_VALUE_NODE(uint64_t, llvm::Type::getInt64Ty(Ctx), Value, \
116 ConstantInt::get(llvm::Type::GetInt64Ty(Ctx), 0))
117 INSTR_PROF_VALUE_NODE(uint64_t, llvm::Type::getInt64Ty(Ctx), Count, \
118 ConstantInt::get(llvm::Type::GetInt64Ty(Ctx), 0))
119 INSTR_PROF_VALUE_NODE(PtrToNodeT, llvm::Type::getInt8PtrTy(Ctx), Next, \
120 ConstantInt::get(llvm::Type::GetInt8PtrTy(Ctx), 0))
121 #undef INSTR_PROF_VALUE_NODE
122 /* INSTR_PROF_VALUE_NODE end. */
124 /* INSTR_PROF_RAW_HEADER start */
125 /* Definition of member fields of the raw profile header data structure. */
126 #ifndef INSTR_PROF_RAW_HEADER
127 #define INSTR_PROF_RAW_HEADER(Type, Name, Initializer)
129 #define INSTR_PROF_DATA_DEFINED
131 INSTR_PROF_RAW_HEADER(uint64_t, Magic, __llvm_profile_get_magic())
132 INSTR_PROF_RAW_HEADER(uint64_t, Version, __llvm_profile_get_version())
133 INSTR_PROF_RAW_HEADER(uint64_t, BinaryIdsSize, __llvm_write_binary_ids(NULL))
134 INSTR_PROF_RAW_HEADER(uint64_t, NumData, NumData)
135 INSTR_PROF_RAW_HEADER(uint64_t, PaddingBytesBeforeCounters, PaddingBytesBeforeCounters)
136 INSTR_PROF_RAW_HEADER(uint64_t, NumCounters, NumCounters)
137 INSTR_PROF_RAW_HEADER(uint64_t, PaddingBytesAfterCounters, PaddingBytesAfterCounters)
138 INSTR_PROF_RAW_HEADER(uint64_t, NumBitmapBytes, NumBitmapBytes)
139 INSTR_PROF_RAW_HEADER(uint64_t, PaddingBytesAfterBitmapBytes, PaddingBytesAfterBitmapBytes)
140 INSTR_PROF_RAW_HEADER(uint64_t, NamesSize, NamesSize)
141 INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta,
142 (uintptr_t)CountersBegin - (uintptr_t)DataBegin)
143 INSTR_PROF_RAW_HEADER(uint64_t, BitmapDelta,
144 (uintptr_t)BitmapBegin - (uintptr_t)DataBegin)
145 INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
146 INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
147 #undef INSTR_PROF_RAW_HEADER
148 /* INSTR_PROF_RAW_HEADER end */
150 /* VALUE_PROF_FUNC_PARAM start */
151 /* Definition of parameter types of the runtime API used to do value profiling
152 * for a given value site.
154 #ifndef VALUE_PROF_FUNC_PARAM
155 #define VALUE_PROF_FUNC_PARAM(ArgType, ArgName, ArgLLVMType)
156 #define INSTR_PROF_COMMA
158 #define INSTR_PROF_DATA_DEFINED
159 #define INSTR_PROF_COMMA ,
161 VALUE_PROF_FUNC_PARAM(uint64_t, TargetValue, Type::getInt64Ty(Ctx)) \
163 VALUE_PROF_FUNC_PARAM(void *, Data, Type::getInt8PtrTy(Ctx)) INSTR_PROF_COMMA
164 VALUE_PROF_FUNC_PARAM(uint32_t, CounterIndex, Type::getInt32Ty(Ctx))
165 #undef VALUE_PROF_FUNC_PARAM
166 #undef INSTR_PROF_COMMA
167 /* VALUE_PROF_FUNC_PARAM end */
169 /* VALUE_PROF_KIND start */
170 #ifndef VALUE_PROF_KIND
171 #define VALUE_PROF_KIND(Enumerator, Value, Descr)
173 #define INSTR_PROF_DATA_DEFINED
175 /* For indirect function call value profiling, the addresses of the target
176 * functions are profiled by the instrumented code. The target addresses are
177 * written in the raw profile data and converted to target function name's MD5
178 * hash by the profile reader during deserialization. Typically, this happens
179 * when the raw profile data is read during profile merging.
181 * For this remapping the ProfData is used. ProfData contains both the function
182 * name hash and the function address.
184 VALUE_PROF_KIND(IPVK_IndirectCallTarget, 0, "indirect call target")
185 /* For memory intrinsic functions size profiling. */
186 VALUE_PROF_KIND(IPVK_MemOPSize, 1, "memory intrinsic functions size")
187 /* These two kinds must be the last to be
188 * declared. This is to make sure the string
189 * array created with the template can be
190 * indexed with the kind value.
192 VALUE_PROF_KIND(IPVK_First, IPVK_IndirectCallTarget, "first")
193 VALUE_PROF_KIND(IPVK_Last, IPVK_MemOPSize, "last")
195 #undef VALUE_PROF_KIND
196 /* VALUE_PROF_KIND end */
198 #undef COVMAP_V2_OR_V3
200 #define COVMAP_V2_OR_V3
203 #define COVMAP_V2_OR_V3
206 /* COVMAP_FUNC_RECORD start */
207 /* Definition of member fields of the function record structure in coverage
210 #ifndef COVMAP_FUNC_RECORD
211 #define COVMAP_FUNC_RECORD(Type, LLVMType, Name, Initializer)
213 #define INSTR_PROF_DATA_DEFINED
216 COVMAP_FUNC_RECORD(const IntPtrT, llvm::Type::getInt8PtrTy(Ctx), \
217 NamePtr, llvm::ConstantExpr::getBitCast(NamePtr, \
218 llvm::Type::getInt8PtrTy(Ctx)))
219 COVMAP_FUNC_RECORD(const uint32_t, llvm::Type::getInt32Ty(Ctx), NameSize, \
220 llvm::ConstantInt::get(llvm::Type::getInt32Ty(Ctx), \
223 #ifdef COVMAP_V2_OR_V3
224 COVMAP_FUNC_RECORD(const int64_t, llvm::Type::getInt64Ty(Ctx), NameRef, \
225 llvm::ConstantInt::get( \
226 llvm::Type::getInt64Ty(Ctx), NameHash))
228 COVMAP_FUNC_RECORD(const uint32_t, llvm::Type::getInt32Ty(Ctx), DataSize, \
229 llvm::ConstantInt::get( \
230 llvm::Type::getInt32Ty(Ctx), CoverageMapping.size()))
231 COVMAP_FUNC_RECORD(const uint64_t, llvm::Type::getInt64Ty(Ctx), FuncHash, \
232 llvm::ConstantInt::get( \
233 llvm::Type::getInt64Ty(Ctx), FuncHash))
235 COVMAP_FUNC_RECORD(const uint64_t, llvm::Type::getInt64Ty(Ctx), FilenamesRef, \
236 llvm::ConstantInt::get( \
237 llvm::Type::getInt64Ty(Ctx), FilenamesRef))
238 COVMAP_FUNC_RECORD(const char, \
239 llvm::ArrayType::get(llvm::Type::getInt8Ty(Ctx), \
240 CoverageMapping.size()), \
242 llvm::ConstantDataArray::getRaw( \
243 CoverageMapping, CoverageMapping.size(), \
244 llvm::Type::getInt8Ty(Ctx)))
246 #undef COVMAP_FUNC_RECORD
247 /* COVMAP_FUNC_RECORD end. */
249 /* COVMAP_HEADER start */
250 /* Definition of member fields of coverage map header.
252 #ifndef COVMAP_HEADER
253 #define COVMAP_HEADER(Type, LLVMType, Name, Initializer)
255 #define INSTR_PROF_DATA_DEFINED
257 COVMAP_HEADER(uint32_t, Int32Ty, NRecords, \
258 llvm::ConstantInt::get(Int32Ty, NRecords))
259 COVMAP_HEADER(uint32_t, Int32Ty, FilenamesSize, \
260 llvm::ConstantInt::get(Int32Ty, FilenamesSize))
261 COVMAP_HEADER(uint32_t, Int32Ty, CoverageSize, \
262 llvm::ConstantInt::get(Int32Ty, CoverageMappingSize))
263 COVMAP_HEADER(uint32_t, Int32Ty, Version, \
264 llvm::ConstantInt::get(Int32Ty, CovMapVersion::CurrentVersion))
266 /* COVMAP_HEADER end. */
269 #ifdef INSTR_PROF_SECT_ENTRY
270 #define INSTR_PROF_DATA_DEFINED
271 INSTR_PROF_SECT_ENTRY(IPSK_data, \
272 INSTR_PROF_QUOTE(INSTR_PROF_DATA_COMMON), \
273 INSTR_PROF_DATA_COFF, "__DATA,")
274 INSTR_PROF_SECT_ENTRY(IPSK_cnts, \
275 INSTR_PROF_QUOTE(INSTR_PROF_CNTS_COMMON), \
276 INSTR_PROF_CNTS_COFF, "__DATA,")
277 INSTR_PROF_SECT_ENTRY(IPSK_bitmap, \
278 INSTR_PROF_QUOTE(INSTR_PROF_BITS_COMMON), \
279 INSTR_PROF_BITS_COFF, "__DATA,")
280 INSTR_PROF_SECT_ENTRY(IPSK_name, \
281 INSTR_PROF_QUOTE(INSTR_PROF_NAME_COMMON), \
282 INSTR_PROF_NAME_COFF, "__DATA,")
283 INSTR_PROF_SECT_ENTRY(IPSK_vals, \
284 INSTR_PROF_QUOTE(INSTR_PROF_VALS_COMMON), \
285 INSTR_PROF_VALS_COFF, "__DATA,")
286 INSTR_PROF_SECT_ENTRY(IPSK_vnodes, \
287 INSTR_PROF_QUOTE(INSTR_PROF_VNODES_COMMON), \
288 INSTR_PROF_VNODES_COFF, "__DATA,")
289 INSTR_PROF_SECT_ENTRY(IPSK_covmap, \
290 INSTR_PROF_QUOTE(INSTR_PROF_COVMAP_COMMON), \
291 INSTR_PROF_COVMAP_COFF, "__LLVM_COV,")
292 INSTR_PROF_SECT_ENTRY(IPSK_covfun, \
293 INSTR_PROF_QUOTE(INSTR_PROF_COVFUN_COMMON), \
294 INSTR_PROF_COVFUN_COFF, "__LLVM_COV,")
295 INSTR_PROF_SECT_ENTRY(IPSK_orderfile, \
296 INSTR_PROF_QUOTE(INSTR_PROF_ORDERFILE_COMMON), \
297 INSTR_PROF_QUOTE(INSTR_PROF_ORDERFILE_COFF), "__DATA,")
299 #undef INSTR_PROF_SECT_ENTRY
303 #ifdef INSTR_PROF_VALUE_PROF_DATA
304 #define INSTR_PROF_DATA_DEFINED
306 #define INSTR_PROF_MAX_NUM_VAL_PER_SITE 255
308 * This is the header of the data structure that defines the on-disk
309 * layout of the value profile data of a particular kind for one function.
311 typedef struct ValueProfRecord {
312 /* The kind of the value profile record. */
315 * The number of value profile sites. It is guaranteed to be non-zero;
316 * otherwise the record for this kind won't be emitted.
318 uint32_t NumValueSites;
320 * The first element of the array that stores the number of profiled
321 * values for each value site. The size of the array is NumValueSites.
322 * Since NumValueSites is greater than zero, there is at least one
323 * element in the array.
325 uint8_t SiteCountArray[1];
328 * The fake declaration is for documentation purpose only.
329 * Align the start of next field to be on 8 byte boundaries.
333 /* The array of value profile data. The size of the array is the sum
334 * of all elements in SiteCountArray[].
335 InstrProfValueData ValueData[];
340 * Return the number of value sites.
342 uint32_t getNumValueSites() const { return NumValueSites; }
344 * Read data from this record and save it to Record.
346 void deserializeTo(InstrProfRecord &Record,
347 InstrProfSymtab *SymTab);
349 * In-place byte swap:
350 * Do byte swap for this instance. \c Old is the original order before
351 * the swap, and \c New is the New byte order.
353 void swapBytes(support::endianness Old, support::endianness New);
358 * Per-function header/control data structure for value profiling
359 * data in indexed format.
361 typedef struct ValueProfData {
363 * Total size in bytes including this field. It must be a multiple
364 * of sizeof(uint64_t).
368 *The number of value profile kinds that has value profile data.
369 * In this implementation, a value profile kind is considered to
370 * have profile data if the number of value profile sites for the
371 * kind is not zero. More aggressively, the implementation can
372 * choose to check the actual data value: if none of the value sites
373 * has any profiled values, the kind can be skipped.
375 uint32_t NumValueKinds;
378 * Following are a sequence of variable length records. The prefix/header
379 * of each record is defined by ValueProfRecord type. The number of
380 * records is NumValueKinds.
381 * ValueProfRecord Record_1;
382 * ValueProfRecord Record_N;
387 * Return the total size in bytes of the on-disk value profile data
388 * given the data stored in Record.
390 static uint32_t getSize(const InstrProfRecord &Record);
392 * Return a pointer to \c ValueProfData instance ready to be streamed.
394 static std::unique_ptr<ValueProfData>
395 serializeFrom(const InstrProfRecord &Record);
397 * Check the integrity of the record.
399 Error checkIntegrity();
401 * Return a pointer to \c ValueProfileData instance ready to be read.
402 * All data in the instance are properly byte swapped. The input
403 * data is assumed to be in little endian order.
405 static Expected<std::unique_ptr<ValueProfData>>
406 getValueProfData(const unsigned char *SrcBuffer,
407 const unsigned char *const SrcBufferEnd,
408 support::endianness SrcDataEndianness);
410 * Swap byte order from \c Endianness order to host byte order.
412 void swapBytesToHost(support::endianness Endianness);
414 * Swap byte order from host byte order to \c Endianness order.
416 void swapBytesFromHost(support::endianness Endianness);
418 * Return the total size of \c ValueProfileData.
420 uint32_t getSize() const { return TotalSize; }
422 * Read data from this data and save it to \c Record.
424 void deserializeTo(InstrProfRecord &Record,
425 InstrProfSymtab *SymTab);
426 void operator delete(void *ptr) { ::operator delete(ptr); }
431 * The closure is designed to abstact away two types of value profile data:
432 * - InstrProfRecord which is the primary data structure used to
433 * represent profile data in host tools (reader, writer, and profile-use)
434 * - value profile runtime data structure suitable to be used by C
437 * Both sources of data need to serialize to disk/memory-buffer in common
438 * format: ValueProfData. The abstraction allows compiler-rt's raw profiler
439 * writer to share the same format and code with indexed profile writer.
441 * For documentation of the member methods below, refer to corresponding methods
442 * in class InstrProfRecord.
444 typedef struct ValueProfRecordClosure {
446 uint32_t (*GetNumValueKinds)(const void *Record);
447 uint32_t (*GetNumValueSites)(const void *Record, uint32_t VKind);
448 uint32_t (*GetNumValueData)(const void *Record, uint32_t VKind);
449 uint32_t (*GetNumValueDataForSite)(const void *R, uint32_t VK, uint32_t S);
452 * After extracting the value profile data from the value profile record,
453 * this method is used to map the in-memory value to on-disk value. If
454 * the method is null, value will be written out untranslated.
456 uint64_t (*RemapValueData)(uint32_t, uint64_t Value);
457 void (*GetValueForSite)(const void *R, InstrProfValueData *Dst, uint32_t K,
459 ValueProfData *(*AllocValueProfData)(size_t TotalSizeInBytes);
460 } ValueProfRecordClosure;
462 INSTR_PROF_VISIBILITY ValueProfRecord *
463 getFirstValueProfRecord(ValueProfData *VPD);
464 INSTR_PROF_VISIBILITY ValueProfRecord *
465 getValueProfRecordNext(ValueProfRecord *VPR);
466 INSTR_PROF_VISIBILITY InstrProfValueData *
467 getValueProfRecordValueData(ValueProfRecord *VPR);
468 INSTR_PROF_VISIBILITY uint32_t
469 getValueProfRecordHeaderSize(uint32_t NumValueSites);
471 #undef INSTR_PROF_VALUE_PROF_DATA
472 #endif /* INSTR_PROF_VALUE_PROF_DATA */
475 #ifdef INSTR_PROF_COMMON_API_IMPL
476 #define INSTR_PROF_DATA_DEFINED
478 #define INSTR_PROF_INLINE inline
479 #define INSTR_PROF_NULLPTR nullptr
481 #define INSTR_PROF_INLINE
482 #define INSTR_PROF_NULLPTR NULL
486 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
490 * Return the \c ValueProfRecord header size including the
493 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
494 uint32_t getValueProfRecordHeaderSize(uint32_t NumValueSites) {
495 uint32_t Size = offsetof(ValueProfRecord, SiteCountArray) +
496 sizeof(uint8_t) * NumValueSites;
497 /* Round the size to multiple of 8 bytes. */
498 Size = (Size + 7) & ~7;
503 * Return the total size of the value profile record including the
504 * header and the value data.
506 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
507 uint32_t getValueProfRecordSize(uint32_t NumValueSites,
508 uint32_t NumValueData) {
509 return getValueProfRecordHeaderSize(NumValueSites) +
510 sizeof(InstrProfValueData) * NumValueData;
514 * Return the pointer to the start of value data array.
516 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
517 InstrProfValueData *getValueProfRecordValueData(ValueProfRecord *This) {
518 return (InstrProfValueData *)((char *)This + getValueProfRecordHeaderSize(
519 This->NumValueSites));
523 * Return the total number of value data for \c This record.
525 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
526 uint32_t getValueProfRecordNumValueData(ValueProfRecord *This) {
527 uint32_t NumValueData = 0;
529 for (I = 0; I < This->NumValueSites; I++)
530 NumValueData += This->SiteCountArray[I];
535 * Use this method to advance to the next \c This \c ValueProfRecord.
537 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
538 ValueProfRecord *getValueProfRecordNext(ValueProfRecord *This) {
539 uint32_t NumValueData = getValueProfRecordNumValueData(This);
540 return (ValueProfRecord *)((char *)This +
541 getValueProfRecordSize(This->NumValueSites,
546 * Return the first \c ValueProfRecord instance.
548 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
549 ValueProfRecord *getFirstValueProfRecord(ValueProfData *This) {
550 return (ValueProfRecord *)((char *)This + sizeof(ValueProfData));
553 /* Closure based interfaces. */
556 * Return the total size in bytes of the on-disk value profile data
557 * given the data stored in Record.
559 INSTR_PROF_VISIBILITY uint32_t
560 getValueProfDataSize(ValueProfRecordClosure *Closure) {
562 uint32_t TotalSize = sizeof(ValueProfData);
563 const void *Record = Closure->Record;
565 for (Kind = IPVK_First; Kind <= IPVK_Last; Kind++) {
566 uint32_t NumValueSites = Closure->GetNumValueSites(Record, Kind);
569 TotalSize += getValueProfRecordSize(NumValueSites,
570 Closure->GetNumValueData(Record, Kind));
576 * Extract value profile data of a function for the profile kind \c ValueKind
577 * from the \c Closure and serialize the data into \c This record instance.
579 INSTR_PROF_VISIBILITY void
580 serializeValueProfRecordFrom(ValueProfRecord *This,
581 ValueProfRecordClosure *Closure,
582 uint32_t ValueKind, uint32_t NumValueSites) {
584 const void *Record = Closure->Record;
585 This->Kind = ValueKind;
586 This->NumValueSites = NumValueSites;
587 InstrProfValueData *DstVD = getValueProfRecordValueData(This);
589 for (S = 0; S < NumValueSites; S++) {
590 uint32_t ND = Closure->GetNumValueDataForSite(Record, ValueKind, S);
591 This->SiteCountArray[S] = ND;
592 Closure->GetValueForSite(Record, DstVD, ValueKind, S);
598 * Extract value profile data of a function from the \c Closure
599 * and serialize the data into \c DstData if it is not NULL or heap
600 * memory allocated by the \c Closure's allocator method. If \c
601 * DstData is not null, the caller is expected to set the TotalSize
604 INSTR_PROF_VISIBILITY ValueProfData *
605 serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
606 ValueProfData *DstData) {
609 DstData ? DstData->TotalSize : getValueProfDataSize(Closure);
612 DstData ? DstData : Closure->AllocValueProfData(TotalSize);
614 VPD->TotalSize = TotalSize;
615 VPD->NumValueKinds = Closure->GetNumValueKinds(Closure->Record);
616 ValueProfRecord *VR = getFirstValueProfRecord(VPD);
617 for (Kind = IPVK_First; Kind <= IPVK_Last; Kind++) {
618 uint32_t NumValueSites = Closure->GetNumValueSites(Closure->Record, Kind);
621 serializeValueProfRecordFrom(VR, Closure, Kind, NumValueSites);
622 VR = getValueProfRecordNext(VR);
627 #undef INSTR_PROF_COMMON_API_IMPL
628 #endif /* INSTR_PROF_COMMON_API_IMPL */
630 /*============================================================================*/
632 #ifndef INSTR_PROF_DATA_DEFINED
634 #ifndef INSTR_PROF_DATA_INC
635 #define INSTR_PROF_DATA_INC
638 #define INSTR_PROF_SIMPLE_QUOTE(x) #x
639 #define INSTR_PROF_QUOTE(x) INSTR_PROF_SIMPLE_QUOTE(x)
640 #define INSTR_PROF_SIMPLE_CONCAT(x,y) x ## y
641 #define INSTR_PROF_CONCAT(x,y) INSTR_PROF_SIMPLE_CONCAT(x,y)
643 /* Magic number to detect file format and endianness.
644 * Use 255 at one end, since no UTF-8 file can use that character. Avoid 0,
645 * so that utilities, like strings, don't grab it as a string. 129 is also
646 * invalid UTF-8, and high enough to be interesting.
647 * Use "lprofr" in the centre to stand for "LLVM Profile Raw", or "lprofR"
648 * for 32-bit platforms.
650 #define INSTR_PROF_RAW_MAGIC_64 (uint64_t)255 << 56 | (uint64_t)'l' << 48 | \
651 (uint64_t)'p' << 40 | (uint64_t)'r' << 32 | (uint64_t)'o' << 24 | \
652 (uint64_t)'f' << 16 | (uint64_t)'r' << 8 | (uint64_t)129
653 #define INSTR_PROF_RAW_MAGIC_32 (uint64_t)255 << 56 | (uint64_t)'l' << 48 | \
654 (uint64_t)'p' << 40 | (uint64_t)'r' << 32 | (uint64_t)'o' << 24 | \
655 (uint64_t)'f' << 16 | (uint64_t)'R' << 8 | (uint64_t)129
657 /* Raw profile format version (start from 1). */
658 #define INSTR_PROF_RAW_VERSION 9
659 /* Indexed profile format version (start from 1). */
660 #define INSTR_PROF_INDEX_VERSION 11
661 /* Coverage mapping format version (start from 0). */
662 #define INSTR_PROF_COVMAP_VERSION 6
664 /* Profile version is always of type uint64_t. Reserve the upper 32 bits in the
665 * version for other variants of profile. We set the 8th most significant bit
666 * (i.e. bit 56) to 1 to indicate if this is an IR-level instrumentation
667 * generated profile, and 0 if this is a Clang FE generated profile.
668 * 1 in bit 57 indicates there are context-sensitive records in the profile.
669 * The 59th bit indicates whether to use debug info to correlate profiles.
670 * The 60th bit indicates single byte coverage instrumentation.
671 * The 61st bit indicates function entry instrumentation only.
672 * The 62nd bit indicates whether memory profile information is present.
673 * The 63rd bit indicates if this is a temporal profile.
675 #define VARIANT_MASKS_ALL 0xffffffff00000000ULL
676 #define GET_VERSION(V) ((V) & ~VARIANT_MASKS_ALL)
677 #define VARIANT_MASK_IR_PROF (0x1ULL << 56)
678 #define VARIANT_MASK_CSIR_PROF (0x1ULL << 57)
679 #define VARIANT_MASK_INSTR_ENTRY (0x1ULL << 58)
680 #define VARIANT_MASK_DBG_CORRELATE (0x1ULL << 59)
681 #define VARIANT_MASK_BYTE_COVERAGE (0x1ULL << 60)
682 #define VARIANT_MASK_FUNCTION_ENTRY_ONLY (0x1ULL << 61)
683 #define VARIANT_MASK_MEMPROF (0x1ULL << 62)
684 #define VARIANT_MASK_TEMPORAL_PROF (0x1ULL << 63)
685 #define INSTR_PROF_RAW_VERSION_VAR __llvm_profile_raw_version
686 #define INSTR_PROF_PROFILE_RUNTIME_VAR __llvm_profile_runtime
687 #define INSTR_PROF_PROFILE_COUNTER_BIAS_VAR __llvm_profile_counter_bias
688 #define INSTR_PROF_PROFILE_SET_TIMESTAMP __llvm_profile_set_timestamp
690 /* The variable that holds the name of the profile data
691 * specified via command line. */
692 #define INSTR_PROF_PROFILE_NAME_VAR __llvm_profile_filename
694 /* section name strings common to all targets other
696 #define INSTR_PROF_DATA_COMMON __llvm_prf_data
697 #define INSTR_PROF_NAME_COMMON __llvm_prf_names
698 #define INSTR_PROF_CNTS_COMMON __llvm_prf_cnts
699 #define INSTR_PROF_BITS_COMMON __llvm_prf_bits
700 #define INSTR_PROF_VALS_COMMON __llvm_prf_vals
701 #define INSTR_PROF_VNODES_COMMON __llvm_prf_vnds
702 #define INSTR_PROF_COVMAP_COMMON __llvm_covmap
703 #define INSTR_PROF_COVFUN_COMMON __llvm_covfun
704 #define INSTR_PROF_ORDERFILE_COMMON __llvm_orderfile
705 /* Windows section names. Because these section names contain dollar characters,
706 * they must be quoted.
708 #define INSTR_PROF_DATA_COFF ".lprfd$M"
709 #define INSTR_PROF_NAME_COFF ".lprfn$M"
710 #define INSTR_PROF_CNTS_COFF ".lprfc$M"
711 #define INSTR_PROF_BITS_COFF ".lprfb$M"
712 #define INSTR_PROF_VALS_COFF ".lprfv$M"
713 #define INSTR_PROF_VNODES_COFF ".lprfnd$M"
714 #define INSTR_PROF_COVMAP_COFF ".lcovmap$M"
715 #define INSTR_PROF_COVFUN_COFF ".lcovfun$M"
716 #define INSTR_PROF_ORDERFILE_COFF ".lorderfile$M"
719 /* Runtime section names and name strings. */
720 #define INSTR_PROF_DATA_SECT_NAME INSTR_PROF_DATA_COFF
721 #define INSTR_PROF_NAME_SECT_NAME INSTR_PROF_NAME_COFF
722 #define INSTR_PROF_CNTS_SECT_NAME INSTR_PROF_CNTS_COFF
723 #define INSTR_PROF_BITS_SECT_NAME INSTR_PROF_BITS_COFF
724 /* Array of pointers. Each pointer points to a list
725 * of value nodes associated with one value site.
727 #define INSTR_PROF_VALS_SECT_NAME INSTR_PROF_VALS_COFF
728 /* Value profile nodes section. */
729 #define INSTR_PROF_VNODES_SECT_NAME INSTR_PROF_VNODES_COFF
730 #define INSTR_PROF_COVMAP_SECT_NAME INSTR_PROF_COVMAP_COFF
731 #define INSTR_PROF_COVFUN_SECT_NAME INSTR_PROF_COVFUN_COFF
732 #define INSTR_PROF_ORDERFILE_SECT_NAME INSTR_PROF_ORDERFILE_COFF
734 /* Runtime section names and name strings. */
735 #define INSTR_PROF_DATA_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_DATA_COMMON)
736 #define INSTR_PROF_NAME_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_NAME_COMMON)
737 #define INSTR_PROF_CNTS_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_CNTS_COMMON)
738 #define INSTR_PROF_BITS_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_BITS_COMMON)
739 /* Array of pointers. Each pointer points to a list
740 * of value nodes associated with one value site.
742 #define INSTR_PROF_VALS_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_VALS_COMMON)
743 /* Value profile nodes section. */
744 #define INSTR_PROF_VNODES_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_VNODES_COMMON)
745 #define INSTR_PROF_COVMAP_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_COVMAP_COMMON)
746 #define INSTR_PROF_COVFUN_SECT_NAME INSTR_PROF_QUOTE(INSTR_PROF_COVFUN_COMMON)
747 /* Order file instrumentation. */
748 #define INSTR_PROF_ORDERFILE_SECT_NAME \
749 INSTR_PROF_QUOTE(INSTR_PROF_ORDERFILE_COMMON)
752 #define INSTR_PROF_ORDERFILE_BUFFER_NAME _llvm_order_file_buffer
753 #define INSTR_PROF_ORDERFILE_BUFFER_NAME_STR \
754 INSTR_PROF_QUOTE(INSTR_PROF_ORDERFILE_BUFFER_NAME)
755 #define INSTR_PROF_ORDERFILE_BUFFER_IDX_NAME _llvm_order_file_buffer_idx
756 #define INSTR_PROF_ORDERFILE_BUFFER_IDX_NAME_STR \
757 INSTR_PROF_QUOTE(INSTR_PROF_ORDERFILE_BUFFER_IDX_NAME)
759 /* Macros to define start/stop section symbol for a given
760 * section on Linux. For instance
761 * INSTR_PROF_SECT_START(INSTR_PROF_DATA_SECT_NAME) will
762 * expand to __start___llvm_prof_data
764 #define INSTR_PROF_SECT_START(Sect) \
765 INSTR_PROF_CONCAT(__start_,Sect)
766 #define INSTR_PROF_SECT_STOP(Sect) \
767 INSTR_PROF_CONCAT(__stop_,Sect)
769 /* Value Profiling API linkage name. */
770 #define INSTR_PROF_VALUE_PROF_FUNC __llvm_profile_instrument_target
771 #define INSTR_PROF_VALUE_PROF_FUNC_STR \
772 INSTR_PROF_QUOTE(INSTR_PROF_VALUE_PROF_FUNC)
773 #define INSTR_PROF_VALUE_PROF_MEMOP_FUNC __llvm_profile_instrument_memop
774 #define INSTR_PROF_VALUE_PROF_MEMOP_FUNC_STR \
775 INSTR_PROF_QUOTE(INSTR_PROF_VALUE_PROF_MEMOP_FUNC)
777 /* InstrProfile per-function control data alignment. */
778 #define INSTR_PROF_DATA_ALIGNMENT 8
780 /* The data structure that represents a tracked value by the
783 typedef struct InstrProfValueData {
784 /* Profiled value. */
786 /* Number of times the value appears in the training run. */
788 } InstrProfValueData;
790 #endif /* INSTR_PROF_DATA_INC */
792 #ifndef INSTR_ORDER_FILE_INC
793 /* The maximal # of functions: 128*1024 (the buffer size will be 128*4 KB). */
794 #define INSTR_ORDER_FILE_BUFFER_SIZE 131072
795 #define INSTR_ORDER_FILE_BUFFER_BITS 17
796 #define INSTR_ORDER_FILE_BUFFER_MASK 0x1ffff
797 #endif /* INSTR_ORDER_FILE_INC */
799 #undef INSTR_PROF_DATA_DEFINED
802 #undef COVMAP_V2_OR_V3
804 #ifdef INSTR_PROF_VALUE_PROF_MEMOP_API
807 #define INSTR_PROF_INLINE inline
809 #define INSTR_PROF_INLINE
812 /* The value range buckets (22 buckets) for the memop size value profiling looks
838 * Each range has a 'representative value' which is the lower end value of the
839 * range and used to store in the runtime profile data records and the VP
840 * metadata. For example, it's 2 for [2, 2] and 64 for [65, 127].
842 #define INSTR_PROF_NUM_BUCKETS 22
845 * Clz and Popcount. This code was copied from
846 * compiler-rt/lib/fuzzer/{FuzzerBuiltins.h,FuzzerBuiltinsMsvc.h} and
847 * llvm/include/llvm/Support/MathExtras.h.
849 #if defined(_MSC_VER) && !defined(__clang__)
852 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
853 int InstProfClzll(unsigned long long X) {
854 unsigned long LeadZeroIdx = 0;
855 #if !defined(_M_ARM64) && !defined(_M_X64)
856 // Scan the high 32 bits.
857 if (_BitScanReverse(&LeadZeroIdx, (unsigned long)(X >> 32)))
858 return (int)(63 - (LeadZeroIdx + 32)); // Create a bit offset
860 // Scan the low 32 bits.
861 if (_BitScanReverse(&LeadZeroIdx, (unsigned long)(X)))
862 return (int)(63 - LeadZeroIdx);
864 if (_BitScanReverse64(&LeadZeroIdx, X)) return 63 - LeadZeroIdx;
868 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
869 int InstProfPopcountll(unsigned long long X) {
870 // This code originates from https://reviews.llvm.org/rG30626254510f.
871 unsigned long long v = X;
872 v = v - ((v >> 1) & 0x5555555555555555ULL);
873 v = (v & 0x3333333333333333ULL) + ((v >> 2) & 0x3333333333333333ULL);
874 v = (v + (v >> 4)) & 0x0F0F0F0F0F0F0F0FULL;
875 return (int)((unsigned long long)(v * 0x0101010101010101ULL) >> 56);
880 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
881 int InstProfClzll(unsigned long long X) { return __builtin_clzll(X); }
882 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE
883 int InstProfPopcountll(unsigned long long X) { return __builtin_popcountll(X); }
885 #endif /* defined(_MSC_VER) && !defined(__clang__) */
887 /* Map an (observed) memop size value to the representative value of its range.
888 * For example, 5 -> 5, 22 -> 17, 99 -> 65, 256 -> 256, 1001 -> 513. */
889 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE uint64_t
890 InstrProfGetRangeRepValue(uint64_t Value) {
892 // The first ranges are individually tracked. Use the value as is.
894 else if (Value >= 513)
895 // The last range is mapped to its lowest value.
897 else if (InstProfPopcountll(Value) == 1)
898 // If it's a power of two, use it as is.
901 // Otherwise, take to the previous power of two + 1.
902 return (UINT64_C(1) << (64 - InstProfClzll(Value) - 1)) + 1;
905 /* Return true if the range that an (observed) memop size value belongs to has
906 * only a single value in the range. For example, 0 -> true, 8 -> true, 10 ->
907 * false, 64 -> true, 100 -> false, 513 -> false. */
908 INSTR_PROF_VISIBILITY INSTR_PROF_INLINE unsigned
909 InstrProfIsSingleValRange(uint64_t Value) {
911 // The first ranges are individually tracked.
913 else if (InstProfPopcountll(Value) == 1)
914 // If it's a power of two, there's only one value.
917 // Otherwise, there's more than one value in the range.
921 #endif /* INSTR_PROF_VALUE_PROF_MEMOP_API */