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.
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/* state.c -- Create the backtrace state.
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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 "backtrace-supported.h"
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#include "internal.h"
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/* Create the backtrace state. This will then be passed to all the
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other routines. */
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struct backtrace_state *
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backtrace_create_state (const char *filename, int flags,
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backtrace_error_callback error_callback,
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void *data)
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{
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int threaded;
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int moredata;
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struct backtrace_state init_state;
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struct backtrace_state *state;
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threaded = (flags & 1) != 0;
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moredata = (flags & 2) != 0;
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if ((flags & ~3) != 0)
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{
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error_callback (data, "backtrace_create_state: unsupported flag", 0);
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return NULL;
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}
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#ifndef HAVE_SYNC_FUNCTIONS
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if (threaded)
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{
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error_callback (data, "backtrace library does not support threads", 0);
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return NULL;
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}
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#endif
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memset (&init_state, 0, sizeof init_state);
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init_state.filename = filename;
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init_state.threaded = threaded;
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init_state.moredata = moredata;
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state = ((struct backtrace_state *)
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backtrace_alloc (&init_state, sizeof *state, error_callback, data));
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if (state == NULL)
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return NULL;
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*state = init_state;
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return state;
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}
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