mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Ian RogersandArnaldo Carvalho de Melo
88b4275ff5
Local unwinding only works on the machine libunwind is built for, rather than cross platform, the APIs for remote and local unwinding are similar but types like unw_word_t depend on the included header. Place the architecture specific code into the appropriate libunwind-<arch>.c file. Put generic code in unwind-libunwind.c and use libunwind-arch to choose the correct implementation based on the thread's e_machine. Structuring the code this way avoids including the unwind-libunwind-local.c for each architecture of remote unwinding. Data is moved into the struct unwind_info to simplify the architecture and generic code, trying to keep as much code as possible generic. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andrew Jones <andrew.jones@oss.qualcomm.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Florian Fainelli <florian.fainelli@broadcom.com> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: Li Guan <guanli.oerv@isrc.iscas.ac.cn> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <pjw@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shimin Guo <shimin.guo@skydio.com> Cc: Thomas Richter <tmricht@linux.ibm.com> Cc: Tomas Glozar <tglozar@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/* 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 <stdint.h>
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include "map_symbol.h"
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struct maps;
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struct option;
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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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int unwind__configure(const char *var, const char *value, void *cb);
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int unwind__option(const struct option *opt, const char *arg, int unset);
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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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#ifdef HAVE_LIBDW_SUPPORT
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int libdw__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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#else
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#include "debug.h"
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static inline int libdw__get_entries(unwind_entry_cb_t cb __maybe_unused, 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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pr_warning_once("Error: libdw dwarf unwinding not built into perf\n");
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return 0;
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}
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#endif
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#ifdef HAVE_LIBUNWIND_SUPPORT
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/* libunwind specific */
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int libunwind__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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int unwind__prepare_access(struct maps *maps, uint16_t e_machine);
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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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#include "debug.h"
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static inline int libunwind__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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pr_warning_once("Error: libunwind dwarf unwinding not built into perf\n");
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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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uint16_t e_machine __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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#endif /* __UNWIND_H */
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