forked from OSchip/llvm-project
221 lines
8.4 KiB
C
221 lines
8.4 KiB
C
/*===- InstrProfiling.h- Support library for PGO instrumentation ----------===*\
|
|
|*
|
|
|* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
|* See https://llvm.org/LICENSE.txt for license information.
|
|
|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|*
|
|
\*===----------------------------------------------------------------------===*/
|
|
|
|
#ifndef PROFILE_INSTRPROFILING_H_
|
|
#define PROFILE_INSTRPROFILING_H_
|
|
|
|
#include "InstrProfilingPort.h"
|
|
|
|
#define INSTR_PROF_VISIBILITY COMPILER_RT_VISIBILITY
|
|
#include "InstrProfData.inc"
|
|
|
|
enum ValueKind {
|
|
#define VALUE_PROF_KIND(Enumerator, Value) Enumerator = Value,
|
|
#include "InstrProfData.inc"
|
|
};
|
|
|
|
typedef void *IntPtrT;
|
|
typedef struct COMPILER_RT_ALIGNAS(INSTR_PROF_DATA_ALIGNMENT)
|
|
__llvm_profile_data {
|
|
#define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) Type Name;
|
|
#include "InstrProfData.inc"
|
|
} __llvm_profile_data;
|
|
|
|
typedef struct __llvm_profile_header {
|
|
#define INSTR_PROF_RAW_HEADER(Type, Name, Initializer) Type Name;
|
|
#include "InstrProfData.inc"
|
|
} __llvm_profile_header;
|
|
|
|
typedef struct ValueProfNode * PtrToNodeT;
|
|
typedef struct ValueProfNode {
|
|
#define INSTR_PROF_VALUE_NODE(Type, LLVMType, Name, Initializer) Type Name;
|
|
#include "InstrProfData.inc"
|
|
} 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);
|
|
*/
|
|
void INSTR_PROF_VALUE_PROF_FUNC(
|
|
#define VALUE_PROF_FUNC_PARAM(ArgType, ArgName, ArgLLVMType) ArgType ArgName
|
|
#include "InstrProfData.inc"
|
|
);
|
|
|
|
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 InstrProfilingRuntime.cc 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. */
|
|
COMPILER_RT_VISIBILITY extern int INSTR_PROF_PROFILE_RUNTIME_VAR;
|
|
|
|
/*!
|
|
* 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. */
|
|
|
|
#endif /* PROFILE_INSTRPROFILING_H_ */
|