78925604e9
- use libunwrap which seems to be industry standard - display traceback on console if running interactive or with syslog disabled (color output unless nocolor specified) - print hexdump of offending code - print library filename for each stack frame Type: improvement Change-Id: I61d3056251b87076be0578ccda300aa311c222ef Signed-off-by: Damjan Marion <damarion@cisco.com>
76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
/* SPDX-License-Identifier: Apache-2.0
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* Copyright (c) 2024 Cisco Systems, Inc.
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*/
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#define _GNU_SOURCE
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#include <dlfcn.h>
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#include <vppinfra/clib.h>
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#include <vppinfra/stack.h>
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#include <vppinfra/error.h>
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#if HAVE_LIBUNWIND == 1
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#define UNW_LOCAL_ONLY
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#include <libunwind.h>
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static __thread unw_cursor_t cursor;
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static __thread unw_context_t context;
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#endif
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__clib_export clib_stack_frame_t *
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clib_stack_frame_get (clib_stack_frame_t *sf)
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{
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#if HAVE_LIBUNWIND == 1
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Dl_info info = {};
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if (sf->index == 0)
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{
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if (unw_getcontext (&context) < 0)
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{
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clib_warning ("libunwind: cannot get local machine state\n");
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return 0;
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}
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if (unw_init_local (&cursor, &context) < 0)
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{
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clib_warning (
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"libunwind: cannot initialize cursor for local unwinding\n");
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return 0;
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}
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if (unw_step (&cursor) < 1)
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return 0;
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}
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else if (unw_step (&cursor) < 1)
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return 0;
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if (unw_get_reg (&cursor, UNW_REG_IP, &sf->ip))
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{
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clib_warning ("libunwind: cannot read IP\n");
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return 0;
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}
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if (unw_get_reg (&cursor, UNW_REG_SP, &sf->sp))
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{
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clib_warning ("libunwind: cannot read SP\n");
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return 0;
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}
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if (unw_get_proc_name (&cursor, sf->name, sizeof (sf->name), &sf->offset) <
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0)
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sf->name[0] = sf->offset = 0;
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sf->is_signal_frame = unw_is_signal_frame (&cursor) ? 1 : 0;
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if (dladdr ((void *) sf->ip, &info))
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sf->file_name = info.dli_fname;
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else
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sf->file_name = 0;
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sf->index++;
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return sf;
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#else
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return 0;
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#endif
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}
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