55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
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#include <sys/ptrace.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <libunwind-ptrace.h>
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void die(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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exit(1);
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}
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int main(int argc, char **argv)
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{
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if (argc != 2)
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die("USAGE: unwind-pid <pid>\n");
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unw_addr_space_t as = unw_create_addr_space(&_UPT_accessors, 0);
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pid_t pid = atoi(argv[1]);
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if (ptrace(PTRACE_ATTACH, pid, 0, 0) != 0)
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die("ERROR: cannot attach to %d\n", pid);
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void *context = _UPT_create(pid);
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unw_cursor_t cursor;
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if (unw_init_remote(&cursor, as, context) != 0)
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die("ERROR: cannot initialize cursor for remote unwinding\n");
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do {
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unw_word_t offset, pc;
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char sym[4096];
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if (unw_get_reg(&cursor, UNW_REG_IP, &pc))
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die("ERROR: cannot read program counter\n");
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printf("0x%lx: ", pc);
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if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0)
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printf("(%s+0x%lx)\n", sym, offset);
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else
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printf("-- no symbol name found\n");
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} while (unw_step(&cursor) > 0);
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_UPT_destroy(context);
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(void) ptrace(PTRACE_DETACH, pid, 0, 0);
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return 0;
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}
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