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b7a2b011e9
Rather than have 2 Dwfl unify the Dwfl in skip-callchain-idx with that is used by libdw__addr2line(). Rename that variable in 'struct dso' from 'a2l_libdw' to just 'libdw' as it is now used in more than addr2line. The Dwfl in skip-callchain-idx uses a map address when being read with dwfl_report_elf (rather than dwfl_report_offline that addr2line uses). skip-callchain-idx is wrong as the map address can vary between processes because of ASLR, ie it should need a different Dwfl per process. In the code after this patch the base address becomes 0 and the mapped PC is used with the dwfl functions. This should increase the accuracy of skip-callchain-idx, but the impact has only been build tested. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Aditya Bodkhe <aditya.b1@linux.ibm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Chun-Tse Shao <ctshao@google.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Guo Ren <guoren@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.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: Krzysztof Łopatowski <krzysztof.m.lopatowski@gmail.com> Cc: Leo Yan <leo.yan@linux.dev> Cc: Mark Wielaard <mark@klomp.org> 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: Sergei Trofimovich <slyich@gmail.com> Cc: Shimin Guo <shimin.guo@skydio.com> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Thomas Falcon <thomas.falcon@intel.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef PERF_LIBDW_H
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#define PERF_LIBDW_H
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#include <linux/types.h>
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struct dso;
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struct inline_node;
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struct symbol;
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#ifdef HAVE_LIBDW_SUPPORT
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/*
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* libdw__addr2line - Convert address to source location using libdw
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* @addr: Address to resolve
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* @file: Pointer to return filename (caller must free)
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* @line_nr: Pointer to return line number
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* @dso: The dso struct
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* @unwind_inlines: Whether to unwind inline function calls
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* @node: Inline node list to append to
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* @sym: The symbol associated with the address
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*
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* This function initializes a Dwfl context for the DSO if not already present,
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* finds the source line information for the given address, and optionally
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* resolves inline function call chains.
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*
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* Returns 1 on success (found), 0 on failure (not found).
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*/
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int libdw__addr2line(u64 addr, char **file,
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unsigned int *line_nr, struct dso *dso,
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bool unwind_inlines, struct inline_node *node,
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struct symbol *sym);
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/*
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* dso__free_libdw - Free libdw resources associated with the DSO
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* @dso: The dso to free resources for
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*
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* This function cleans up the Dwfl context used for addr2line lookups.
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*/
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void dso__free_libdw(struct dso *dso);
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#else /* HAVE_LIBDW_SUPPORT */
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static inline int libdw__addr2line(u64 addr __maybe_unused, char **file __maybe_unused,
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unsigned int *line_nr __maybe_unused,
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struct dso *dso __maybe_unused,
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bool unwind_inlines __maybe_unused,
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struct inline_node *node __maybe_unused,
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struct symbol *sym __maybe_unused)
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{
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return 0;
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}
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static inline void dso__free_libdw(struct dso *dso __maybe_unused)
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{
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}
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#endif /* HAVE_LIBDW_SUPPORT */
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#endif /* PERF_LIBDW_H */
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