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Use safe_strerror instead of strerror where possible 

This provides threadsafety. Unfortunately, since libinproctrace.so
does not link to gnulib, we can't use it there, especially since it
still includes the gnulib headers (so it is difficult to directly
call the system strerror_r).

gdb/ChangeLog:

2019-11-26  Christian Biesinger  <cbiesinger@google.com>

	* linux-nat.c (detach_one_lwp): Call safe_strerror instead of
	strerror.
	* nto-procfs.c (nto_procfs_target::create_inferior): Likewise.
	* windows-nat.c (windows_nat_target::create_inferior): Likewise.

gdb/gdbserver/ChangeLog:

2019-11-26  Christian Biesinger  <cbiesinger@google.com>

	* debug.c (debug_set_output): Call safe_strerror instead of
	strerror.
	* linux-low.c (attach_proc_task_lwp_callback): Likewise.
	(linux_kill_one_lwp): Likewise.
	(linux_detach_one_lwp): Likewise.
	(linux_wait_for_event_filtered): Likewise.
	(store_register): Likewise.
	* lynx-low.c (lynx_attach): Likewise.
	* mem-break.c (insert_memory_breakpoint): Likewise.
	(remove_memory_breakpoint): Likewise.
	(delete_fast_tracepoint_jump): Likewise.
	(set_fast_tracepoint_jump): Likewise.
	(uninsert_fast_tracepoint_jumps_at): Likewise.
	(reinsert_fast_tracepoint_jumps_at): Likewise.
	* nto-low.c (nto_xfer_memory): Likewise.
	(nto_resume): Likewise.

Change-Id: I9e259cdcaa6e11bbcc4ee6bdc5b7127d73e11abe
This commit is contained in:
Christian Biesinger 2019-11-22 14:31:35 -06:00
parent 0dfeecca1c
commit 6d91ce9a65
10 changed files with 48 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2019-11-26 Christian Biesinger <cbiesinger@google.com>
* linux-nat.c (detach_one_lwp): Call safe_strerror instead of
strerror.
* nto-procfs.c (nto_procfs_target::create_inferior): Likewise.
* windows-nat.c (windows_nat_target::create_inferior): Likewise.
2019-11-25 Tom de Vries <tdevries@suse.de>
* contrib/words.sh: Add -c option.

19
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,22 @@
2019-11-26 Christian Biesinger <cbiesinger@google.com>
* debug.c (debug_set_output): Call safe_strerror instead of
strerror.
* linux-low.c (attach_proc_task_lwp_callback): Likewise.
(linux_kill_one_lwp): Likewise.
(linux_detach_one_lwp): Likewise.
(linux_wait_for_event_filtered): Likewise.
(store_register): Likewise.
* lynx-low.c (lynx_attach): Likewise.
* mem-break.c (insert_memory_breakpoint): Likewise.
(remove_memory_breakpoint): Likewise.
(delete_fast_tracepoint_jump): Likewise.
(set_fast_tracepoint_jump): Likewise.
(uninsert_fast_tracepoint_jumps_at): Likewise.
(reinsert_fast_tracepoint_jumps_at): Likewise.
* nto-low.c (nto_xfer_memory): Likewise.
(nto_resume): Likewise.
2019-11-20 Luis Machado <luis.machado@linaro.org>
* linux-aarch64-low.c (is_sve_tdesc): Check against target feature

2
gdb/gdbserver/debug.c
View File

@ -55,7 +55,7 @@ debug_set_output (const char *new_debug_file)
if (fptr == nullptr)
{
debug_printf ("Cannot open %s for writing. %s. Switching to stderr.\n",
new_debug_file, strerror (errno));
new_debug_file, safe_strerror (errno));
return;
}

14
gdb/gdbserver/linux-low.c
View File

@ -1159,7 +1159,7 @@ attach_proc_task_lwp_callback (ptid_t ptid)
{
debug_printf ("Cannot attach to lwp %d: "
"thread is gone (%d: %s)\n",
lwpid, err, strerror (err));
lwpid, err, safe_strerror (err));
}
}
else if (err != 0)
@ -1303,7 +1303,7 @@ linux_kill_one_lwp (struct lwp_info *lwp)
debug_printf ("LKL: kill_lwp (SIGKILL) %s, 0, 0 (%s)\n",
target_pid_to_str (ptid_of (thr)),
save_errno ? strerror (save_errno) : "OK");
save_errno ? safe_strerror (save_errno) : "OK");
}
errno = 0;
@ -1314,7 +1314,7 @@ linux_kill_one_lwp (struct lwp_info *lwp)
debug_printf ("LKL: PTRACE_KILL %s, 0, 0 (%s)\n",
target_pid_to_str (ptid_of (thr)),
save_errno ? strerror (save_errno) : "OK");
save_errno ? safe_strerror (save_errno) : "OK");
}
}
@ -1560,7 +1560,7 @@ linux_detach_one_lwp (struct lwp_info *lwp)
if (ret == -1)
{
warning (_("Couldn't reap LWP %d while detaching: %s"),
lwpid, strerror (errno));
lwpid, safe_strerror (errno));
}
else if (!WIFEXITED (status) && !WIFSIGNALED (status))
{
@ -1573,7 +1573,7 @@ linux_detach_one_lwp (struct lwp_info *lwp)
{
error (_("Can't detach %s: %s"),
target_pid_to_str (ptid_of (thread)),
strerror (save_errno));
safe_strerror (save_errno));
}
}
else if (debug_threads)
@ -2715,7 +2715,7 @@ linux_wait_for_event_filtered (ptid_t wait_ptid, ptid_t filter_ptid,
if (debug_threads)
debug_printf ("LWFE: waitpid(-1, ...) returned %d, %s\n",
ret, errno ? strerror (errno) : "ERRNO-OK");
ret, errno ? safe_strerror (errno) : "ERRNO-OK");
if (ret > 0)
{
@ -5593,7 +5593,7 @@ store_register (const struct usrregs_info *usrregs,
return;
if ((*the_low_target.cannot_store_register) (regno) == 0)
error ("writing register %d: %s", regno, strerror (errno));
error ("writing register %d: %s", regno, safe_strerror (errno));
}
regaddr += sizeof (PTRACE_XFER_TYPE);
}

2
gdb/gdbserver/lynx-low.c
View File

@ -316,7 +316,7 @@ lynx_attach (unsigned long pid)
if (lynx_ptrace (PTRACE_ATTACH, ptid, 0, 0, 0) != 0)
error ("Cannot attach to process %lu: %s (%d)\n", pid,
strerror (errno), errno);
safe_strerror (errno), errno);
lynx_add_process (pid, 1);
lynx_add_threads_after_attach (pid);

16
gdb/gdbserver/mem-break.c
View File

@ -374,7 +374,7 @@ insert_memory_breakpoint (struct raw_breakpoint *bp)
if (debug_threads)
debug_printf ("Failed to read shadow memory of"
" breakpoint at 0x%s (%s).\n",
paddress (bp->pc), strerror (err));
paddress (bp->pc), safe_strerror (err));
}
else
{
@ -386,7 +386,7 @@ insert_memory_breakpoint (struct raw_breakpoint *bp)
{
if (debug_threads)
debug_printf ("Failed to insert breakpoint at 0x%s (%s).\n",
paddress (bp->pc), strerror (err));
paddress (bp->pc), safe_strerror (err));
}
}
return err != 0 ? -1 : 0;
@ -415,7 +415,7 @@ remove_memory_breakpoint (struct raw_breakpoint *bp)
if (debug_threads)
debug_printf ("Failed to uninsert raw breakpoint "
"at 0x%s (%s) while deleting it.\n",
paddress (bp->pc), strerror (err));
paddress (bp->pc), safe_strerror (err));
}
return err != 0 ? -1 : 0;
}
@ -597,7 +597,7 @@ delete_fast_tracepoint_jump (struct fast_tracepoint_jump *todel)
if (debug_threads)
debug_printf ("Failed to uninsert fast tracepoint jump "
"at 0x%s (%s) while deleting it.\n",
paddress (bp->pc), strerror (ret));
paddress (bp->pc), safe_strerror (ret));
return ret;
}
@ -660,7 +660,7 @@ set_fast_tracepoint_jump (CORE_ADDR where,
if (debug_threads)
debug_printf ("Failed to read shadow memory of"
" fast tracepoint at 0x%s (%s).\n",
paddress (where), strerror (err));
paddress (where), safe_strerror (err));
free (jp);
return NULL;
}
@ -684,7 +684,7 @@ set_fast_tracepoint_jump (CORE_ADDR where,
{
if (debug_threads)
debug_printf ("Failed to insert fast tracepoint jump at 0x%s (%s).\n",
paddress (where), strerror (err));
paddress (where), safe_strerror (err));
/* Unlink it. */
proc->fast_tracepoint_jumps = jp->next;
@ -739,7 +739,7 @@ uninsert_fast_tracepoint_jumps_at (CORE_ADDR pc)
if (debug_threads)
debug_printf ("Failed to uninsert fast tracepoint jump at"
" 0x%s (%s).\n",
paddress (pc), strerror (err));
paddress (pc), safe_strerror (err));
}
}
}
@ -786,7 +786,7 @@ reinsert_fast_tracepoint_jumps_at (CORE_ADDR where)
if (debug_threads)
debug_printf ("Failed to reinsert fast tracepoint jump at"
" 0x%s (%s).\n",
paddress (where), strerror (err));
paddress (where), safe_strerror (err));
}
}

4
gdb/gdbserver/nto-low.c
View File

@ -247,7 +247,7 @@ nto_xfer_memory (off_t memaddr, unsigned char *myaddr, int len,
if (nbytes == 0)
{
int e = errno;
TRACE ("Error in %s : errno=%d (%s)\n", __func__, e, strerror (e));
TRACE ("Error in %s : errno=%d (%s)\n", __func__, e, safe_strerror (e));
}
return nbytes;
}
@ -505,7 +505,7 @@ nto_resume (struct thread_resume *resume_info, size_t n)
err = devctl (nto_inferior.ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0);
if (err != EOK)
TRACE ("Error: %d \"%s\"\n", err, strerror (err));
TRACE ("Error: %d \"%s\"\n", err, safe_strerror (err));
}
/* Wait for inferior's event.

2
gdb/linux-nat.c
View File

@ -1420,7 +1420,7 @@ detach_one_lwp (struct lwp_info *lp, int *signo_p)
if (ret == -1)
{
warning (_("Couldn't reap LWP %d while detaching: %s"),
lwpid, strerror (errno));
lwpid, safe_strerror (errno));
}
else if (!WIFEXITED (status) && !WIFSIGNALED (status))
{

2
gdb/nto-procfs.c
View File

@ -1317,7 +1317,7 @@ nto_procfs_target::create_inferior (const char *exec_file,
{
/* FIXME: expected warning? */
/* warning( "Failed to set Kill-on-Last-Close flag: errno = %d(%s)\n",
errn, strerror(errn) ); */
errn, safe_strerror(errn) ); */
}
if (!target_is_pushed (ops))
push_target (ops);

2
gdb/windows-nat.c
View File

@ -2710,7 +2710,7 @@ windows_nat_target::create_inferior (const char *exec_file,
redirect_inferior_handles (allargs, allargs_copy,
&fd_inp, &fd_out, &fd_err);
if (errno)
warning (_("Error in redirection: %s."), strerror (errno));
warning (_("Error in redirection: %s."), safe_strerror (errno));
else
errno = e;
allargs_len = strlen (allargs_copy);