blob: 3ef7eacf06be4f1faecde1b7ceacbd7db4143841 [file] [log] [blame]
/*===- InstrProfiling.h- Support library for PGO instrumentation ----------===*\
|* The LLVM Compiler Infrastructure
|* This file is distributed under the University of Illinois Open Source
|* License. See LICENSE.TXT for details.
#include "InstrProfilingPort.h"
#include ""
enum ValueKind {
#define VALUE_PROF_KIND(Enumerator, Value) Enumerator = Value,
#include ""
typedef void *IntPtrT;
__llvm_profile_data {
#define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) Type Name;
#include ""
} __llvm_profile_data;
typedef struct __llvm_profile_header {
#define INSTR_PROF_RAW_HEADER(Type, Name, Initializer) Type Name;
#include ""
} __llvm_profile_header;
typedef struct ValueProfNode * PtrToNodeT;
typedef struct ValueProfNode {
#define INSTR_PROF_VALUE_NODE(Type, LLVMType, Name, Initializer) Type Name;
#include ""
} ValueProfNode;
* \brief Get number of bytes necessary to pad the argument to eight
* byte boundary.
uint8_t __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes);
* \brief Get required size for profile buffer.
uint64_t __llvm_profile_get_size_for_buffer(void);
* \brief Write instrumentation data to the given buffer.
* \pre \c Buffer is the start of a buffer at least as big as \a
* __llvm_profile_get_size_for_buffer().
int __llvm_profile_write_buffer(char *Buffer);
const __llvm_profile_data *__llvm_profile_begin_data(void);
const __llvm_profile_data *__llvm_profile_end_data(void);
const char *__llvm_profile_begin_names(void);
const char *__llvm_profile_end_names(void);
uint64_t *__llvm_profile_begin_counters(void);
uint64_t *__llvm_profile_end_counters(void);
ValueProfNode *__llvm_profile_begin_vnodes();
ValueProfNode *__llvm_profile_end_vnodes();
* \brief Clear profile counters to zero.
void __llvm_profile_reset_counters(void);
* \brief Merge profile data from buffer.
* Read profile data form buffer \p Profile and merge with
* in-process profile counters. The client is expected to
* have checked or already knows the profile data in the
* buffer matches the in-process counter structure before
* calling it.
void __llvm_profile_merge_from_buffer(const char *Profile, uint64_t Size);
/*! \brief Check if profile in buffer matches the current binary.
* Returns 0 (success) if the profile data in buffer \p Profile with size
* \p Size was generated by the same binary and therefore matches
* structurally the in-process counters. If the profile data in buffer is
* not compatible, the interface returns 1 (failure).
int __llvm_profile_check_compatibility(const char *Profile,
uint64_t Size);
* \brief Counts the number of times a target value is seen.
* Records the target value for the CounterIndex if not seen before. Otherwise,
* increments the counter associated w/ the target value.
* void __llvm_profile_instrument_target(uint64_t TargetValue, void *Data,
* uint32_t CounterIndex);
#define VALUE_PROF_FUNC_PARAM(ArgType, ArgName, ArgLLVMType) ArgType ArgName
#include ""
void __llvm_profile_instrument_target_value(uint64_t TargetValue, void *Data,
uint32_t CounterIndex,
uint64_t CounterValue);
* \brief Write instrumentation data to the current file.
* Writes to the file with the last name given to \a *
* __llvm_profile_set_filename(),
* or if it hasn't been called, the \c LLVM_PROFILE_FILE environment variable,
* or if that's not set, the last name set to INSTR_PROF_PROFILE_NAME_VAR,
* or if that's not set, \c "default.profraw".
int __llvm_profile_write_file(void);
* \brief this is a wrapper interface to \c __llvm_profile_write_file.
* After this interface is invoked, a arleady dumped flag will be set
* so that profile won't be dumped again during program exit.
* Invocation of interface __llvm_profile_reset_counters will clear
* the flag. This interface is designed to be used to collect profile
* data from user selected hot regions. The use model is
* __llvm_profile_reset_counters();
* ... hot region 1
* __llvm_profile_dump();
* .. some other code
* __llvm_profile_reset_counters();
* ... hot region 2
* __llvm_profile_dump();
* It is expected that on-line profile merging is on with \c %m specifier
* used in profile filename . If merging is not turned on, user is expected
* to invoke __llvm_profile_set_filename to specify different profile names
* for different regions before dumping to avoid profile write clobbering.
int __llvm_profile_dump(void);
* \brief Set the filename for writing instrumentation data.
* Sets the filename to be used for subsequent calls to
* \a __llvm_profile_write_file().
* \c Name is not copied, so it must remain valid. Passing NULL resets the
* filename logic to the default behaviour.
void __llvm_profile_set_filename(const char *Name);
/*! \brief Register to write instrumentation data to file at exit. */
int __llvm_profile_register_write_file_atexit(void);
/*! \brief Initialize file handling. */
void __llvm_profile_initialize_file(void);
* \brief Return path prefix (excluding the base filename) of the profile data.
* This is useful for users using \c -fprofile-generate=./path_prefix who do
* not care about the default raw profile name. It is also useful to collect
* more than more profile data files dumped in the same directory (Online
* merge mode is turned on for instrumented programs with shared libs).
* Side-effect: this API call will invoke malloc with dynamic memory allocation.
const char *__llvm_profile_get_path_prefix();
* \brief Return filename (including path) of the profile data. Note that if the
* user calls __llvm_profile_set_filename later after invoking this interface,
* the actual file name may differ from what is returned here.
* Side-effect: this API call will invoke malloc with dynamic memory allocation.
const char *__llvm_profile_get_filename();
/*! \brief Get the magic token for the file format. */
uint64_t __llvm_profile_get_magic(void);
/*! \brief Get the version of the file format. */
uint64_t __llvm_profile_get_version(void);
/*! \brief Get the number of entries in the profile data section. */
uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
const __llvm_profile_data *End);
* This variable is defined in as a hidden
* symbol. Its main purpose is to enable profile runtime user to
* bypass runtime initialization code -- if the client code explicitly
* define this variable, then InstProfileRuntime.o won't be linked in.
* Note that this variable's visibility needs to be hidden so that the
* definition of this variable in an instrumented shared library won't
* affect runtime initialization decision of the main program.
* __llvm_profile_profile_runtime. */
* This variable is defined in InstrProfiling.c. Its main purpose is to
* encode the raw profile version value and other format related information
* such as whether the profile is from IR based instrumentation. The variable
* is defined as weak so that compiler can emit an overriding definition
* depending on user option. Since we don't support mixing FE and IR based
* data in the same raw profile data file (in other words, shared libs and
* main program are expected to be instrumented in the same way), there is
* no need for this variable to be hidden.
extern uint64_t INSTR_PROF_RAW_VERSION_VAR; /* __llvm_profile_raw_version */
* This variable is a weak symbol defined in InstrProfiling.c. It allows
* compiler instrumentation to provide overriding definition with value
* from compiler command line. This variable has default visibility.
extern char INSTR_PROF_PROFILE_NAME_VAR[1]; /* __llvm_profile_filename. */