Attachment 149248 Details for Bug 230850 – test case

test case

vdso-test.c (text/plain), 2.28 KB, created by Roland McGrath on 2007-03-05 08:16:06 UTC

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Creator: Roland McGrath

Created: 2007-03-05 08:16:06 UTC

Size: 2.28 KB

patch

obsolete

>
>#include <config.h>
>#include <stdio.h>
>#include <stdio_ext.h>
>#include <inttypes.h>
>#include <locale.h>
>#include <stdlib.h>
>#include <string.h>
>#include <errno.h>
>#include <error.h>
>#include <unistd.h>
>#include <signal.h>
>#include <sys/wait.h>
>#include <sys/ptrace.h>
>#include ELFUTILS_HEADER(dwfl)
>
>static int
>check_module (Dwfl_Module *mod,
>	      void **userdata __attribute__ ((unused)),
>	      const char *name, Dwarf_Addr base __attribute__ ((unused)),
>	      void *arg __attribute__ ((unused)))
>{
>  if (strncmp (name, "[vdso: ", sizeof "[vdso: " - 1))
>    return DWARF_CB_OK;
>
>  int n = dwfl_module_getsymtab (mod);
>  if (n < 0)
>    error (2, 0, "dwfl_module_getsymtab: %s", dwfl_errmsg (-1));
>
>  for (int i = 0; i < n; ++i)
>    {
>      GElf_Sym sym;
>      const char *name = dwfl_module_getsym (mod, i, &sym, NULL);
>      printf ("%#" PRIx64 "  %s\n", sym.st_value, name);
>    }
>
>  exit (0);
>}
>
>int
>main (int argc, char **argv)
>{
>  /* We use no threads here which can interfere with handling a stream.  */
>  (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER);
>
>  /* Set locale.  */
>  (void) setlocale (LC_ALL, "");
>
>  pid_t ppid = getpid ();
>  pid_t pid = fork ();
>  if (pid < 0)
>    error (2, errno, "fork");
>
>  if (pid == 0)
>    {
>      if (argc > 1 && !strcmp (argv[1], "ptrace"))
>	ptrace (PTRACE_TRACEME);
>      raise (SIGSTOP);
>
>      do
>	sleep (1);
>      while (kill (ppid, 0) == 0);
>      _exit (0);
>    }
>
>  int status;
>  if (waitpid (pid, &status, WUNTRACED) != pid)
>    error (2, errno, "waitpid (child %d)", pid);
>
>  static const Dwfl_Callbacks proc_callbacks =
>    {
>      .find_debuginfo = dwfl_standard_find_debuginfo,
>      .find_elf = dwfl_linux_proc_find_elf,
>    };
>  Dwfl *dwfl = dwfl_begin (&proc_callbacks);
>  if (dwfl == NULL)
>    error (2, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
>
>  int result = dwfl_linux_proc_report (dwfl, pid);
>  if (result < 0)
>    error (2, 0, "dwfl_linux_proc_report: %s", dwfl_errmsg (-1));
>  else if (result > 0)
>    error (2, result, "dwfl_linux_proc_report");
>
>  if (dwfl_report_end (dwfl, NULL, NULL) != 0)
>    error (2, 0, "dwfl_report_end: %s", dwfl_errmsg (-1));
>
>  ptrdiff_t p = 0;
>  do
>    p = dwfl_getmodules (dwfl, &check_module, NULL, p);
>  while (p > 0);
>  if (p < 0)
>    error (2, 0, "dwfl_getmodules: %s", dwfl_errmsg (-1));
>
>  dwfl_end (dwfl);
>
>  return 1;
>}

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Attachments on bug 230850: 149185 | 149186 | 149248 | 149350