91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __UNWIND_H
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#define __UNWIND_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include "util/map_symbol.h"
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struct maps;
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struct perf_sample;
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struct thread;
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struct unwind_entry {
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struct map_symbol ms;
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u64 ip;
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};
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typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
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struct unwind_libunwind_ops {
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int (*prepare_access)(struct maps *maps);
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void (*flush_access)(struct maps *maps);
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void (*finish_access)(struct maps *maps);
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int (*get_entries)(unwind_entry_cb_t cb, void *arg,
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struct thread *thread,
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struct perf_sample *data, int max_stack, bool best_effort);
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};
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#ifdef HAVE_DWARF_UNWIND_SUPPORT
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/*
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* When best_effort is set, don't report errors and fail silently. This could
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* be expanded in the future to be more permissive about things other than
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* error messages.
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*/
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int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
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struct thread *thread,
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struct perf_sample *data, int max_stack,
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bool best_effort);
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/* libunwind specific */
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#ifdef HAVE_LIBUNWIND_SUPPORT
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#ifndef LIBUNWIND__ARCH_REG_ID
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#define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
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#endif
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#ifndef LIBUNWIND__ARCH_REG_SP
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#define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
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#endif
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#ifndef LIBUNWIND__ARCH_REG_IP
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#define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
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#endif
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int LIBUNWIND__ARCH_REG_ID(int regnum);
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int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized);
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void unwind__flush_access(struct maps *maps);
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void unwind__finish_access(struct maps *maps);
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#else
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static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
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struct map *map __maybe_unused,
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bool *initialized __maybe_unused)
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{
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return 0;
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}
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static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
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static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
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#endif
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#else
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static inline int
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unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
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void *arg __maybe_unused,
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struct thread *thread __maybe_unused,
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struct perf_sample *data __maybe_unused,
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int max_stack __maybe_unused,
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bool best_effort __maybe_unused)
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{
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return 0;
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}
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static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
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struct map *map __maybe_unused,
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bool *initialized __maybe_unused)
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{
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return 0;
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}
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static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
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static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
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#endif /* HAVE_DWARF_UNWIND_SUPPORT */
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#endif /* __UNWIND_H */
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