LLVM  13.0.0git
Enumerations | Functions
SampleProfReader.cpp File Reference
#include "llvm/ProfileData/SampleProfReader.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/ProfileSummary.h"
#include "llvm/ProfileData/ProfileCommon.h"
#include "llvm/ProfileData/SampleProf.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <memory>
#include <system_error>
#include <vector>
Include dependency graph for SampleProfReader.cpp:

Go to the source code of this file.


enum  LineType { LineType::CallSiteProfile, LineType::BodyProfile, LineType::Metadata }


static bool ParseHead (const StringRef &Input, StringRef &FName, uint64_t &NumSamples, uint64_t &NumHeadSamples)
 Parse Input as function head. More...
static bool isOffsetLegal (unsigned L)
 Returns true if line offset L is legal (only has 16 bits). More...
static bool parseMetadata (const StringRef &Input, uint64_t &FunctionHash)
 Parse Input that contains metadata. More...
static bool ParseLine (const StringRef &Input, LineType &LineTy, uint32_t &Depth, uint64_t &NumSamples, uint32_t &LineOffset, uint32_t &Discriminator, StringRef &CalleeName, DenseMap< StringRef, uint64_t > &TargetCountMap, uint64_t &FunctionHash)
 Parse Input as line sample. More...
static std::string getSecFlagsStr (const SecHdrTableEntry &Entry)
static ErrorOr< std::unique_ptr< MemoryBuffer > > setupMemoryBuffer (const Twine &Filename)
 Prepare a memory buffer for the contents of Filename. More...

Enumeration Type Documentation

◆ LineType

enum LineType

Definition at line 99 of file SampleProfReader.cpp.

Function Documentation

◆ getSecFlagsStr()

static std::string getSecFlagsStr ( const SecHdrTableEntry Entry)

Definition at line 997 of file SampleProfReader.cpp.

◆ isOffsetLegal()

static bool isOffsetLegal ( unsigned  L)

Returns true if line offset L is legal (only has 16 bits).

Definition at line 84 of file SampleProfReader.cpp.

Referenced by ParseLine(), and llvm::sampleprof::SampleProfileReaderBinary::readProfile().

◆ ParseHead()

static bool ParseHead ( const StringRef Input,
StringRef FName,
uint64_t &  NumSamples,
uint64_t &  NumHeadSamples 

Parse Input as function head.

Parse one line of Input, and update function name in FName, function's total sample count in NumSamples, function's entry count in NumHeadSamples.

true if parsing is successful.

Definition at line 69 of file SampleProfReader.cpp.

References llvm::StringRef::getAsInteger(), llvm::StringRef::rfind(), and llvm::StringRef::substr().

Referenced by llvm::sampleprof::SampleProfileReaderText::hasFormat(), and llvm::sampleprof::SampleProfileReaderText::readImpl().

◆ ParseLine()

static bool ParseLine ( const StringRef Input,
LineType LineTy,
uint32_t Depth,
uint64_t &  NumSamples,
uint32_t LineOffset,
uint32_t Discriminator,
StringRef CalleeName,
DenseMap< StringRef, uint64_t > &  TargetCountMap,
uint64_t &  FunctionHash 

Parse Input as line sample.

Inputinput line.
LineTyType of this line.
Depththe depth of the inline stack.
NumSamplestotal samples of the line/inlined callsite.
LineOffsetline offset to the start of the function.
Discriminatordiscriminator of the line.
TargetCountMapmap from indirect call target to count.
FunctionHashthe function's CFG hash, used by pseudo probe.

returns true if parsing is successful.

Definition at line 117 of file SampleProfReader.cpp.

References BodyProfile, CallSiteProfile, llvm::count(), llvm::Depth, llvm::StringRef::find(), llvm::StringRef::find_first_not_of(), llvm::StringRef::find_first_of(), llvm::StringRef::find_last_of(), llvm::StringRef::getAsInteger(), isOffsetLegal(), Metadata, llvm::StringRef::npos, parseMetadata(), llvm::StringRef::size(), and llvm::StringRef::substr().

Referenced by llvm::sampleprof::SampleProfileReaderText::readImpl().

◆ parseMetadata()

static bool parseMetadata ( const StringRef Input,
uint64_t &  FunctionHash 

Parse Input that contains metadata.

Possible metadata:

  • CFG Checksum information: !CFGChecksum: 12345 Stores the FunctionHash (a.k.a. CFG Checksum) into FunctionHash.

Definition at line 91 of file SampleProfReader.cpp.

References llvm::StringRef::getAsInteger(), llvm::StringRef::startswith(), llvm::StringRef::substr(), and llvm::StringRef::trim().

Referenced by llvm::MetadataLoader::parseFunctionMetadata(), ParseLine(), and llvm::MetadataLoader::parseModuleMetadata().

◆ setupMemoryBuffer()

static ErrorOr<std::unique_ptr<MemoryBuffer> > setupMemoryBuffer ( const Twine Filename)

Prepare a memory buffer for the contents of Filename.

an error code indicating the status of the buffer.

Definition at line 1484 of file SampleProfReader.cpp.

References llvm::sampleprof::SampleProfileReader::Buffer, llvm::MemoryBuffer::getFileOrSTDIN(), llvm::max(), move, and llvm::too_large.

Referenced by llvm::sampleprof::SampleProfileReaderItaniumRemapper::create(), and llvm::sampleprof::SampleProfileReader::create().