mirror of
https://github.com/ianlancetaylor/libbacktrace.git
synced 2026-09-07 12:17:06 +08:00
Ian Lance Taylor
6f8310e238
Based on patch from Andi Kleen. * backtrace.h (backtrace_create_state): Rewrite comment to change threaded parameter to flags. (backtrace_full_callback, backtrace_syminfo_callback): Document behavior change if moredata flag is set. (struct backtrace_moredata): Define. * backtrace-supported.h.in (BACKTRACE_SUPPORTS_MOREDATA): Define. * internal.h (struct backtrace_state): Add moredata field. (BACKTRACE_MOREDATA_VERSION): Define. * state.c (backtrace_create_state): Change threaded parameter to flags. Set state moredata field based on flags. * dwarf.c (struct line): Add disc field. (struct function): Add caller_disc field. (call_callback): New static function. (add_line): Add disc parameter. Change all callers. Store disc in new line value. (read_line_program): Track discriminator value. (read_line_info): Initialize disc field in final line entry. (read_function_entry): Handle DW_AT_GNU_discriminator. (report_inlined_functions): Add disc parameter. Change all callers. Call call_callback rather than calling callback directly. (dwarf_lookup_pc): Handle inlined discriminators. Call call_callback rather than calling callback directly. (dwarf_fileline): Call call_callback rather than calling callback directly. * elf.c (elf_syminfo): Pass moredata if requested. * macho.c (macho_syminfo): Likewise. * pecoff.c (coff_syminfo): Likewise. * xcoff.c (xcoff_syminfo): Likewise. (xcoff_lookup_pc): Likewise. * backtrace.c: #include <string.h>. (unwind): Pass moredata if requested. * unknown.c: #include <string.h>. (unknown_fileline): Pass moredata if requested. * fileline.c (backtrace_syminfo_to_full_callback): Add comment about moredata. * mdtest.c: New test file. * Makefile.am (mdtest_SOURCES): Define. (mdtest_CFLAGS, mdtest_LDFLAGS, mdtest_LDADD): Define. (BUILDTESTS): Add mdtest. * Makefile.in: Regenerate.
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/* unknown.c -- used when backtrace configury does not know file format.
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Copyright (C) 2012-2026 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Google.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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(1) Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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(2) Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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(3) The name of the author may not be used to
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endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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#include "config.h"
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#include <string.h>
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#include <sys/types.h>
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#include "backtrace.h"
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#include "internal.h"
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/* A trivial routine that always fails to find fileline data. */
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static int
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unknown_fileline (struct backtrace_state *state, uintptr_t pc,
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backtrace_full_callback callback,
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backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
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void *data)
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{
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if (!state->moredata)
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return callback (data, pc, NULL, 0, NULL);
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else
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{
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struct backtrace_moredata md;
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memset (&md, 0, sizeof md);
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md.backtrace_version = 3;
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md.backtrace_data = data;
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return callback ((void *) &md, pc, NULL, 0, NULL);
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}
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}
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/* Initialize the backtrace data when we don't know how to read the
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debug info. */
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int
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backtrace_initialize (struct backtrace_state *state ATTRIBUTE_UNUSED,
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const char *filename ATTRIBUTE_UNUSED,
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int descriptor ATTRIBUTE_UNUSED,
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backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
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void *data ATTRIBUTE_UNUSED, fileline *fileline_fn)
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{
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state->fileline_data = NULL;
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*fileline_fn = unknown_fileline;
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return 1;
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}
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