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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __PERF_LLVM_C_HELPERS3#define __PERF_LLVM_C_HELPERS 14 5/*6 * Helpers to call into LLVM C++ code from C, for the parts that do not have7 * C APIs.8 */9 10#include <linux/compiler.h>11 12#ifdef __cplusplus13extern "C" {14#endif15 16struct dso;17 18struct llvm_a2l_frame {19 char* filename;20 char* funcname;21 unsigned int line;22};23 24/*25 * Implement addr2line() using libLLVM. LLVM is a C++ API, and26 * many of the linux/ headers cannot be included in a C++ compile unit,27 * so we need to make a little bridge code here. llvm_addr2line() will28 * convert the inline frame information from LLVM's internal structures29 * and put them into a flat array given in inline_frames. The caller30 * is then responsible for taking that array and convert it into perf's31 * regular inline frame structures (which depend on e.g. struct list_head).32 *33 * If the address could not be resolved, or an error occurred (e.g. OOM),34 * returns 0. Otherwise, returns the number of inline frames (which means 135 * if the address was not part of an inlined function). If unwind_inlines36 * is set and the return code is nonzero, inline_frames will be set to37 * a newly allocated array with that length. The caller is then responsible38 * for freeing both the strings and the array itself.39 */40int llvm_addr2line(const char* dso_name,41 u64 addr,42 char** file,43 unsigned int* line,44 bool unwind_inlines,45 struct llvm_a2l_frame** inline_frames);46 47/*48 * Simple symbolizers for addresses; will convert something like49 * 0x12345 to "func+0x123". Will return NULL if no symbol was found.50 *51 * The returned value must be freed by the caller, with free().52 */53char *llvm_name_for_code(struct dso *dso, const char *dso_name, u64 addr);54char *llvm_name_for_data(struct dso *dso, const char *dso_name, u64 addr);55 56#ifdef __cplusplus57}58#endif59 60#endif /* __PERF_LLVM_C_HELPERS */61