| /*===- 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" |
| #include <stdio.h> |
| |
| // Make sure __LLVM_INSTR_PROFILE_GENERATE is always defined before |
| // including instr_prof_interface.h so the interface functions are |
| // declared correctly for the runtime. |
| // __LLVM_INSTR_PROFILE_GENERATE is always `#undef`ed after the header, |
| // because compiler-rt does not support profiling the profiling runtime itself. |
| #ifndef __LLVM_INSTR_PROFILE_GENERATE |
| #define __LLVM_INSTR_PROFILE_GENERATE |
| #endif |
| #include "profile/instr_prof_interface.h" |
| #undef __LLVM_INSTR_PROFILE_GENERATE |
| |
| #define INSTR_PROF_VISIBILITY COMPILER_RT_VISIBILITY |
| #include "profile/InstrProfData.inc" |
| |
| enum ValueKind { |
| #define VALUE_PROF_KIND(Enumerator, Value, Descr) Enumerator = Value, |
| #include "profile/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 "profile/InstrProfData.inc" |
| } __llvm_profile_data; |
| |
| typedef struct __llvm_profile_header { |
| #define INSTR_PROF_RAW_HEADER(Type, Name, Initializer) Type Name; |
| #include "profile/InstrProfData.inc" |
| } __llvm_profile_header; |
| |
| typedef struct ValueProfNode * PtrToNodeT; |
| typedef struct ValueProfNode { |
| #define INSTR_PROF_VALUE_NODE(Type, LLVMType, Name, Initializer) Type Name; |
| #include "profile/InstrProfData.inc" |
| } ValueProfNode; |
| |
| typedef struct COMPILER_RT_ALIGNAS(INSTR_PROF_DATA_ALIGNMENT) VTableProfData { |
| #define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Initializer) Type Name; |
| #include "profile/InstrProfData.inc" |
| } VTableProfData; |
| |
| /*! |
| * \brief Return 1 if profile counters are continuously synced to the raw |
| * profile via an mmap(). This is in contrast to the default mode, in which |
| * the raw profile is written out at program exit time. |
| */ |
| int __llvm_profile_is_continuous_mode_enabled(void); |
| |
| /*! |
| * \brief Enable continuous mode. |
| * |
| * See \ref __llvm_profile_is_continuous_mode_enabled. The behavior is undefined |
| * if continuous mode is already enabled, or if it cannot be enable due to |
| * conflicting options. |
| */ |
| void __llvm_profile_enable_continuous_mode(void); |
| |
| /*! |
| * \brief Disable continuous mode. |
| * |
| */ |
| void __llvm_profile_disable_continuous_mode(void); |
| |
| /*! |
| * \brief Set the page size. |
| * |
| * This is a pre-requisite for enabling continuous mode. The buffer size |
| * calculation code inside of libprofile cannot simply call getpagesize(), as |
| * it is not allowed to depend on libc. |
| */ |
| void __llvm_profile_set_page_size(unsigned PageSize); |
| |
| /*! |
| * \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); |
| const char *__llvm_profile_begin_vtabnames(void); |
| const char *__llvm_profile_end_vtabnames(void); |
| char *__llvm_profile_begin_counters(void); |
| char *__llvm_profile_end_counters(void); |
| char *__llvm_profile_begin_bitmap(void); |
| char *__llvm_profile_end_bitmap(void); |
| ValueProfNode *__llvm_profile_begin_vnodes(); |
| ValueProfNode *__llvm_profile_end_vnodes(); |
| const VTableProfData *__llvm_profile_begin_vtables(); |
| const VTableProfData *__llvm_profile_end_vtables(); |
| uint32_t *__llvm_profile_begin_orderfile(); |
| |
| /*! |
| * \brief Merge profile data from buffer. |
| * |
| * Read profile data from buffer \p Profile and merge with in-process profile |
| * counters and bitmaps. The client is expected to have checked or already |
| * know the profile data in the buffer matches the in-process counter |
| * structure before calling it. Returns 0 (success) if the profile data is |
| * valid. Upon reading invalid/corrupted profile data, returns 1 (failure). |
| */ |
| int __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 and bitmaps. 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 "profile/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); |
| |
| int __llvm_orderfile_write_file(void); |
| |
| /*! |
| * \brief Set the FILE object for writing instrumentation data. Return 0 if set |
| * successfully or return 1 if failed. |
| * |
| * Sets the FILE object to be used for subsequent calls to |
| * \a __llvm_profile_write_file(). The profile file name set by environment |
| * variable, command-line option, or calls to \a __llvm_profile_set_filename |
| * will be ignored. |
| * |
| * \c File will not be closed after a call to \a __llvm_profile_write_file() but |
| * it may be flushed. Passing NULL restores default behavior. |
| * |
| * If \c EnableMerge is nonzero, the runtime will always merge profiling data |
| * with the contents of the profiling file. If EnableMerge is zero, the runtime |
| * may still merge the data if it would have merged for another reason (for |
| * example, because of a %m specifier in the file name). |
| * |
| * Note: There may be multiple copies of the profile runtime (one for each |
| * instrumented image/DSO). This API only modifies the file object within the |
| * copy of the runtime available to the calling image. |
| * |
| * Warning: This is a no-op if EnableMerge is 0 in continuous mode (\ref |
| * __llvm_profile_is_continuous_mode_enabled), because disable merging requires |
| * copying the old profile file to new profile file and this function is usually |
| * used when the proess doesn't have permission to open file. |
| */ |
| int __llvm_profile_set_file_object(FILE *File, int EnableMerge); |
| |
| /*! \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 Initialize the profile runtime. */ |
| void __llvm_profile_initialize(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 |
| * (the returned pointer must be passed to `free` to avoid a leak). |
| * |
| * Note: There may be multiple copies of the profile runtime (one for each |
| * instrumented image/DSO). This API only retrieves the filename from the copy |
| * of the runtime available to the calling image. |
| */ |
| 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_num_data(const __llvm_profile_data *Begin, |
| const __llvm_profile_data *End); |
| |
| /*! \brief Get the size of the profile data section in bytes. */ |
| uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin, |
| const __llvm_profile_data *End); |
| |
| /*! \brief Get the size in bytes of a single counter entry. */ |
| size_t __llvm_profile_counter_entry_size(void); |
| |
| /*! \brief Get the number of entries in the profile counters section. */ |
| uint64_t __llvm_profile_get_num_counters(const char *Begin, const char *End); |
| |
| /*! \brief Get the size of the profile counters section in bytes. */ |
| uint64_t __llvm_profile_get_counters_size(const char *Begin, const char *End); |
| |
| /*! \brief Get the number of bytes in the profile bitmap section. */ |
| uint64_t __llvm_profile_get_num_bitmap_bytes(const char *Begin, |
| const char *End); |
| |
| /*! \brief Get the size of the profile name section in bytes. */ |
| uint64_t __llvm_profile_get_name_size(const char *Begin, const char *End); |
| |
| /*! \brief Get the number of virtual table profile data entries */ |
| uint64_t __llvm_profile_get_num_vtable(const VTableProfData *Begin, |
| const VTableProfData *End); |
| |
| /*! \brief Get the size of virtual table profile data in bytes. */ |
| uint64_t __llvm_profile_get_vtable_section_size(const VTableProfData *Begin, |
| const VTableProfData *End); |
| |
| /* ! \brief Given the sizes of the data and counter information, computes the |
| * number of padding bytes before and after the counter section, as well as the |
| * number of padding bytes after other setions in the raw profile. |
| * Returns -1 upon errors and 0 upon success. Output parameters should be used |
| * iff return value is 0. |
| * |
| * Note: When mmap() mode is disabled, no padding bytes before/after counters |
| * are needed. However, in mmap() mode, the counter section in the raw profile |
| * must be page-aligned: this API computes the number of padding bytes |
| * needed to achieve that. |
| */ |
| int __llvm_profile_get_padding_sizes_for_counters( |
| uint64_t DataSize, uint64_t CountersSize, uint64_t NumBitmapBytes, |
| uint64_t NamesSize, uint64_t VTableSize, uint64_t VNameSize, |
| uint64_t *PaddingBytesBeforeCounters, uint64_t *PaddingBytesAfterCounters, |
| uint64_t *PaddingBytesAfterBitmap, uint64_t *PaddingBytesAfterNames, |
| uint64_t *PaddingBytesAfterVTable, uint64_t *PaddingBytesAfterVNames); |
| |
| /*! |
| * \brief Set the flag that profile data has been dumped to the file. |
| * This is useful for users to disable dumping profile data to the file for |
| * certain processes in case the processes don't have permission to write to |
| * the disks, and trying to do so would result in side effects such as crashes. |
| */ |
| void __llvm_profile_set_dumped(); |
| |
| /*! |
| * This variable is defined in InstrProfilingRuntime.cpp 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 InstrProfilingVersionVar.c as a hidden symbol |
| * (except on Apple platforms where this symbol is checked by TAPI). 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. |
| */ |
| COMPILER_RT_VISIBILITY 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_ */ |