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/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.

Functions
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	ParseLine (const StringRef &Input, bool &IsCallsite, uint32_t &Depth, uint64_t &NumSamples, uint32_t &LineOffset, uint32_t &Discriminator, StringRef &CalleeName, DenseMap< StringRef, uint64_t > &TargetCountMap)
	Parse Input as line sample. More...
static ErrorOr< std::unique_ptr< MemoryBuffer > >	setupMemoryBuffer (const Twine &Filename)
	Prepare a memory buffer for the contents of Filename. More...

Function Documentation

isOffsetLegal()

static bool isOffsetLegal ( unsigned  L )

static

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  )

static

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.

Returns

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::read().

ParseLine()

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

static

Parse Input as line sample.

Parameters

Input	input line.
IsCallsite	true if the line represents an inlined callsite.
Depth	the depth of the inline stack.
NumSamples	total samples of the line/inlined callsite.
LineOffset	line offset to the start of the function.
Discriminator	discriminator of the line.
TargetCountMap	map from indirect call target to count.

returns true if parsing is successful.

Definition at line 97 of file SampleProfReader.cpp.

References 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(), llvm::StringRef::npos, llvm::StringRef::size(), and llvm::StringRef::substr().

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

setupMemoryBuffer()

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

static

Prepare a memory buffer for the contents of Filename.

Returns

an error code indicating the status of the buffer.

Definition at line 953 of file SampleProfReader.cpp.

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

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