#include "inf-ptrace.h"
#include "auxv.h"
#include <sys/param.h> /* for MAXPATHLEN */
-#include <sys/procfs.h> /* for elf_gregset etc. */
+#include <sys/procfs.h> /* for elf_gregset etc. */
#include "elf-bfd.h" /* for elfcore_write_* */
#include "gregset.h" /* for gregset */
#include "gdbcore.h" /* for get_exec_file */
#include <ctype.h> /* for isdigit */
-#include "gdbthread.h" /* for struct thread_info etc. */
+#include "gdbthread.h" /* for struct thread_info etc. */
#include "gdb_stat.h" /* for struct stat */
#include <fcntl.h> /* for O_RDONLY */
#include "inf-loop.h"
# endif
#endif /* HAVE_PERSONALITY */
-/* This comment documents high-level logic of this file.
+/* This comment documents high-level logic of this file.
Waiting for events in sync mode
===============================
When waiting for an event in a specific thread, we just use waitpid, passing
the specific pid, and not passing WNOHANG.
-When waiting for an event in all threads, waitpid is not quite good. Prior to
+When waiting for an event in all threads, waitpid is not quite good. Prior to
version 2.4, Linux can either wait for event in main thread, or in secondary
-threads. (2.4 has the __WALL flag). So, if we use blocking waitpid, we might
+threads. (2.4 has the __WALL flag). So, if we use blocking waitpid, we might
miss an event. The solution is to use non-blocking waitpid, together with
sigsuspend. First, we use non-blocking waitpid to get an event in the main
-process, if any. Second, we use non-blocking waitpid with the __WCLONED
+process, if any. Second, we use non-blocking waitpid with the __WCLONED
flag to check for events in cloned processes. If nothing is found, we use
sigsuspend to wait for SIGCHLD. When SIGCHLD arrives, it means something
happened to a child process -- and SIGCHLD will be delivered both for events
in main debugged process and in cloned processes. As soon as we know there's
-an event, we get back to calling nonblocking waitpid with and without __WCLONED.
+an event, we get back to calling nonblocking waitpid with and without
+__WCLONED.
Note that SIGCHLD should be blocked between waitpid and sigsuspend calls,
-so that we don't miss a signal. If SIGCHLD arrives in between, when it's
+so that we don't miss a signal. If SIGCHLD arrives in between, when it's
blocked, the signal becomes pending and sigsuspend immediately
notices it and returns.
#define PTRACE_SETOPTIONS 0x4200
#define PTRACE_GETEVENTMSG 0x4201
-/* options set using PTRACE_SETOPTIONS */
+/* Options set using PTRACE_SETOPTIONS. */
#define PTRACE_O_TRACESYSGOOD 0x00000001
#define PTRACE_O_TRACEFORK 0x00000002
#define PTRACE_O_TRACEVFORK 0x00000004
show_debug_linux_nat_async (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("Debugging of GNU/Linux async lwp module is %s.\n"),
+ fprintf_filtered (file,
+ _("Debugging of GNU/Linux async lwp module is %s.\n"),
value);
}
struct cmd_list_element *c, const char *value)
{
#ifdef HAVE_PERSONALITY
- fprintf_filtered (file, _("\
-Disabling randomization of debuggee's virtual address space is %s.\n"),
+ fprintf_filtered (file,
+ _("Disabling randomization of debuggee's "
+ "virtual address space is %s.\n"),
value);
#else /* !HAVE_PERSONALITY */
- fputs_filtered (_("\
-Disabling randomization of debuggee's virtual address space is unsupported on\n\
-this platform.\n"), file);
+ fputs_filtered (_("Disabling randomization of debuggee's "
+ "virtual address space is unsupported on\n"
+ "this platform.\n"), file);
#endif /* !HAVE_PERSONALITY */
}
static void
-set_disable_randomization (char *args, int from_tty, struct cmd_list_element *c)
+set_disable_randomization (char *args, int from_tty,
+ struct cmd_list_element *c)
{
#ifndef HAVE_PERSONALITY
- error (_("\
-Disabling randomization of debuggee's virtual address space is unsupported on\n\
-this platform."));
+ error (_("Disabling randomization of debuggee's "
+ "virtual address space is unsupported on\n"
+ "this platform."));
#endif /* !HAVE_PERSONALITY */
}
static int linux_supports_tracefork_flag = -1;
-/* This variable is a tri-state flag: -1 for unknown, 0 if PTRACE_O_TRACESYSGOOD
- can not be used, 1 if it can. */
+/* This variable is a tri-state flag: -1 for unknown, 0 if
+ PTRACE_O_TRACESYSGOOD can not be used, 1 if it can. */
static int linux_supports_tracesysgood_flag = -1;
static int linux_supports_tracevforkdone_flag = -1;
-/* Async mode support */
+/* Async mode support. */
/* Zero if the async mode, although enabled, is masked, which means
linux_nat_wait should behave as if async mode was off. */
}
static void linux_nat_async (void (*callback)
- (enum inferior_event_type event_type, void *context),
+ (enum inferior_event_type event_type,
+ void *context),
void *context);
static int linux_nat_async_mask (int mask);
static int kill_lwp (int lwpid, int signo);
else if (ret != child_pid)
error (_("linux_test_for_tracefork: waitpid: unexpected result %d."), ret);
if (! WIFSTOPPED (status))
- error (_("linux_test_for_tracefork: waitpid: unexpected status %d."), status);
+ error (_("linux_test_for_tracefork: waitpid: unexpected status %d."),
+ status);
ret = ptrace (PTRACE_SETOPTIONS, child_pid, 0, PTRACE_O_TRACEFORK);
if (ret != 0)
ret = my_waitpid (child_pid, &status, 0);
if (ret != child_pid)
- warning (_("linux_test_for_tracefork: failed to wait for killed child"));
+ warning (_("linux_test_for_tracefork: failed "
+ "to wait for killed child"));
else if (!WIFSIGNALED (status))
- warning (_("linux_test_for_tracefork: unexpected wait status 0x%x from "
- "killed child"), status);
+ warning (_("linux_test_for_tracefork: unexpected "
+ "wait status 0x%x from killed child"), status);
restore_child_signals_mask (&prev_mask);
return;
my_waitpid (second_pid, &second_status, 0);
ret = ptrace (PTRACE_KILL, second_pid, 0, 0);
if (ret != 0)
- warning (_("linux_test_for_tracefork: failed to kill second child"));
+ warning (_("linux_test_for_tracefork: "
+ "failed to kill second child"));
my_waitpid (second_pid, &status, 0);
}
}
Can not resume the parent process over vfork in the foreground while\n\
holding the child stopped. Try \"set detach-on-fork\" or \
\"set schedule-multiple\".\n"));
+ /* FIXME output string > 80 columns. */
return 1;
}
{
struct lwp_info *child_lp = NULL;
- /* We're already attached to the parent, by default. */
+ /* We're already attached to the parent, by default. */
/* Detach new forked process? */
if (detach_fork)
{
target_terminal_ours ();
fprintf_filtered (gdb_stdlog,
- "Detaching after fork from child process %d.\n",
+ "Detaching after fork from "
+ "child process %d.\n",
child_pid);
}
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
- "LCFF: no VFORK_DONE support, sleeping a bit\n");
+ "LCFF: no VFORK_DONE "
+ "support, sleeping a bit\n");
usleep (10000);
{
target_terminal_ours ();
if (has_vforked)
- fprintf_filtered (gdb_stdlog, _("\
-Attaching after process %d vfork to child process %d.\n"),
+ fprintf_filtered (gdb_stdlog,
+ _("Attaching after process %d "
+ "vfork to child process %d.\n"),
parent_pid, child_pid);
else
- fprintf_filtered (gdb_stdlog, _("\
-Attaching after process %d fork to child process %d.\n"),
+ fprintf_filtered (gdb_stdlog,
+ _("Attaching after process %d "
+ "fork to child process %d.\n"),
parent_pid, child_pid);
}
}
\f
-static void
+static int
linux_child_insert_fork_catchpoint (int pid)
{
- if (! linux_supports_tracefork (pid))
- error (_("Your system does not support fork catchpoints."));
+ return !linux_supports_tracefork (pid);
}
-static void
+static int
linux_child_insert_vfork_catchpoint (int pid)
{
- if (!linux_supports_tracefork (pid))
- error (_("Your system does not support vfork catchpoints."));
+ return !linux_supports_tracefork (pid);
}
-static void
+static int
linux_child_insert_exec_catchpoint (int pid)
{
- if (!linux_supports_tracefork (pid))
- error (_("Your system does not support exec catchpoints."));
+ return !linux_supports_tracefork (pid);
}
static int
linux_child_set_syscall_catchpoint (int pid, int needed, int any_count,
int table_size, int *table)
{
- if (! linux_supports_tracesysgood (pid))
- error (_("Your system does not support syscall catchpoints."));
+ if (!linux_supports_tracesysgood (pid))
+ return 1;
+
/* On GNU/Linux, we ignore the arguments. It means that we only
enable the syscall catchpoints, but do not disable them.
-
+
Also, we do not use the `table' information because we do not
filter system calls here. We let GDB do the logic for us. */
return 0;
else if (!signal_pass_state (signo))
{
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "\
-GPT: lwp %s had signal %s, but it is in no pass state\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "GPT: lwp %s had signal %s, "
+ "but it is in no pass state\n",
target_pid_to_str (lp->ptid),
target_signal_to_string (signo));
}
lp->stopped_by_watchpoint = 0;
}
else if (lp->stopped && debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "RC: Not resuming sibling %s (has pending)\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "RC: Not resuming sibling %s (has pending)\n",
target_pid_to_str (lp->ptid));
else if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "RC: Not resuming sibling %s (not stopped)\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "RC: Not resuming sibling %s (not stopped)\n",
target_pid_to_str (lp->ptid));
return 0;
fprintf_unfiltered (gdb_stdlog,
"LHST: stopping for %s of syscall %d"
" for LWP %ld\n",
- lp->syscall_state == TARGET_WAITKIND_SYSCALL_ENTRY
+ lp->syscall_state
+ == TARGET_WAITKIND_SYSCALL_ENTRY
? "entry" : "return",
syscall_number,
GET_LWP (lp->ptid));
PT_CONTINUE, can not trigger a syscall trace event. */
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
- "LHST: caught syscall event with no syscall catchpoints."
+ "LHST: caught syscall event "
+ "with no syscall catchpoints."
" %d for LWP %ld, ignoring\n",
syscall_number,
GET_LWP (lp->ptid));
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
- "LHEW: Got clone event from LWP %ld, resuming\n",
+ "LHEW: Got clone event "
+ "from LWP %ld, resuming\n",
GET_LWP (lp->ptid));
linux_ops->to_resume (linux_ops, pid_to_ptid (GET_LWP (lp->ptid)),
0, TARGET_SIGNAL_0);
if (current_inferior ()->waiting_for_vfork_done)
{
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "\
-LHEW: Got expected PTRACE_EVENT_VFORK_DONE from LWP %ld: stopping\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "LHEW: Got expected PTRACE_EVENT_"
+ "VFORK_DONE from LWP %ld: stopping\n",
GET_LWP (lp->ptid));
ourstatus->kind = TARGET_WAITKIND_VFORK_DONE;
}
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "\
-LHEW: Got PTRACE_EVENT_VFORK_DONE from LWP %ld: resuming\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "LHEW: Got PTRACE_EVENT_VFORK_DONE "
+ "from LWP %ld: resuming\n",
GET_LWP (lp->ptid));
ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
return 1;
ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
if (debug_linux_nat)
fprintf_unfiltered (gdb_stdlog,
- "PTRACE_CONT %s, 0, 0 (%s) (discarding SIGINT)\n",
+ "PTRACE_CONT %s, 0, 0 (%s) "
+ "(discarding SIGINT)\n",
target_pid_to_str (lp->ptid),
errno ? safe_strerror (errno) : "OK");
save_sigtrap (lp);
- /* Now resume this LWP and get the SIGSTOP event. */
+ /* Now resume this LWP and get the SIGSTOP event. */
errno = 0;
ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
if (debug_linux_nat)
target_pid_to_str (lp->ptid));
}
/* Hold this event/waitstatus while we check to see if
- there are any more (we still want to get that SIGSTOP). */
+ there are any more (we still want to get that SIGSTOP). */
stop_wait_callback (lp, NULL);
/* Hold the SIGTRAP for handling by linux_nat_wait. If
there's another event, throw it back into the
- queue. */
+ queue. */
if (lp->status)
{
if (debug_linux_nat)
kill_lwp (GET_LWP (lp->ptid), WSTOPSIG (lp->status));
}
- /* Save the sigtrap event. */
+ /* Save the sigtrap event. */
lp->status = status;
return 0;
}
else
{
/* The thread was stopped with a signal other than
- SIGSTOP, and didn't accidentally trip a breakpoint. */
+ SIGSTOP, and didn't accidentally trip a breakpoint. */
if (debug_linux_nat)
{
status_to_str ((int) status),
target_pid_to_str (lp->ptid));
}
- /* Now resume this LWP and get the SIGSTOP event. */
+ /* Now resume this LWP and get the SIGSTOP event. */
errno = 0;
ptrace (PTRACE_CONT, GET_LWP (lp->ptid), 0, 0);
if (debug_linux_nat)
errno ? safe_strerror (errno) : "OK");
/* Hold this event/waitstatus while we check to see if
- there are any more (we still want to get that SIGSTOP). */
+ there are any more (we still want to get that SIGSTOP). */
stop_wait_callback (lp, NULL);
/* If the lp->status field is still empty, use it to
gdb_assert (selector != NULL);
- /* Select only resumed LWPs that have a SIGTRAP event pending. */
+ /* Select only resumed LWPs that have a SIGTRAP event pending. */
if (lp->resumed && linux_nat_lp_status_is_event (lp))
if ((*selector)-- == 0)
return 1;
}
/* Make sure we don't report an event for the exit of an LWP not in
- our list, i.e. not part of the current process. This can happen
+ our list, i.e. not part of the current process. This can happen
if we detach from a program we original forked and then it
exits. */
if (!WIFSTOPPED (status) && !lp)
gdb_assert (lp->resumed);
if (debug_linux_nat)
- fprintf (stderr, "LWP %ld got an event %06x, leaving pending.\n",
+ fprintf (stderr,
+ "LWP %ld got an event %06x, leaving pending.\n",
ptid_get_lwp (lp->ptid), lp->status);
if (WIFSTOPPED (lp->status))
if (debug_linux_nat)
fprintf (stderr,
- "LLW: LWP %ld hit a breakpoint while waiting "
- "for another process; cancelled it\n",
+ "LLW: LWP %ld hit a breakpoint while"
+ " waiting for another process;"
+ " cancelled it\n",
ptid_get_lwp (lp->ptid));
}
lp->stopped = 1;
else if (WIFEXITED (lp->status) || WIFSIGNALED (lp->status))
{
if (debug_linux_nat)
- fprintf (stderr, "Process %ld exited while stopping LWPs\n",
+ fprintf (stderr,
+ "Process %ld exited while stopping LWPs\n",
ptid_get_lwp (lp->ptid));
/* This was the last lwp in the process. Since
ptid_t event_ptid;
if (debug_linux_nat)
- fprintf_unfiltered (gdb_stdlog, "linux_nat_wait: [%s]\n", target_pid_to_str (ptid));
+ fprintf_unfiltered (gdb_stdlog,
+ "linux_nat_wait: [%s]\n", target_pid_to_str (ptid));
/* Flush the async file first. */
if (target_can_async_p ())
if (core_regset_p
&& (regset = gdbarch_regset_from_core_section (gdbarch, ".reg",
- sizeof (gregs))) != NULL
- && regset->collect_regset != NULL)
+ sizeof (gregs)))
+ != NULL && regset->collect_regset != NULL)
regset->collect_regset (regset, regcache, -1,
&gregs, sizeof (gregs));
else
if (core_regset_p
&& (regset = gdbarch_regset_from_core_section (gdbarch, ".reg2",
- sizeof (fpregs))) != NULL
- && regset->collect_regset != NULL)
+ sizeof (fpregs)))
+ != NULL && regset->collect_regset != NULL)
regset->collect_regset (regset, regcache, -1,
&fpregs, sizeof (fpregs));
else
}
else
{
- /* [...] (future options here) */
+ /* [...] (future options here). */
}
argv++;
}
if (fscanf (procfile, "%ld ", <mp) > 0)
printf_filtered (_("stime, children: %ld\n"), ltmp);
if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("jiffies remaining in current time slice: %ld\n"),
- ltmp);
+ printf_filtered (_("jiffies remaining in current "
+ "time slice: %ld\n"), ltmp);
if (fscanf (procfile, "%ld ", <mp) > 0)
printf_filtered (_("'nice' value: %ld\n"), ltmp);
if (fscanf (procfile, "%lu ", <mp) > 0)
printf_filtered (_("jiffies until next SIGALRM: %lu\n"),
(unsigned long) ltmp);
if (fscanf (procfile, "%ld ", <mp) > 0)
- printf_filtered (_("start time (jiffies since system boot): %ld\n"),
- ltmp);
+ printf_filtered (_("start time (jiffies since "
+ "system boot): %ld\n"), ltmp);
if (fscanf (procfile, "%lu ", <mp) > 0)
printf_filtered (_("Virtual memory size: %lu\n"),
(unsigned long) ltmp);
if (fscanf (procfile, "%lu ", <mp) > 0)
- printf_filtered (_("Resident set size: %lu\n"), (unsigned long) ltmp);
+ printf_filtered (_("Resident set size: %lu\n"),
+ (unsigned long) ltmp);
if (fscanf (procfile, "%lu ", <mp) > 0)
printf_filtered (_("rlim: %lu\n"), (unsigned long) ltmp);
if (fscanf (procfile, "%lu ", <mp) > 0)
printf_filtered (_("End of text: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%lu ", <mp) > 0)
printf_filtered (_("Start of stack: 0x%lx\n"), ltmp);
-#if 0 /* Don't know how architecture-dependent the rest is...
- Anyway the signal bitmap info is available from "status". */
- if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
+#if 0 /* Don't know how architecture-dependent the rest is...
+ Anyway the signal bitmap info is available from "status". */
+ if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
printf_filtered (_("Kernel stack pointer: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
+ if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
printf_filtered (_("Kernel instr pointer: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%ld ", <mp) > 0)
printf_filtered (_("Pending signals bitmap: 0x%lx\n"), ltmp);
printf_filtered (_("Ignored signals bitmap: 0x%lx\n"), ltmp);
if (fscanf (procfile, "%ld ", <mp) > 0)
printf_filtered (_("Catched signals bitmap: 0x%lx\n"), ltmp);
- if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
+ if (fscanf (procfile, "%lu ", <mp) > 0) /* FIXME arch? */
printf_filtered (_("wchan (system call): 0x%lx\n"), ltmp);
#endif
do_cleanups (cleanup);
SIGS to match. */
void
-linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored)
+linux_proc_pending_signals (int pid, sigset_t *pending,
+ sigset_t *blocked, sigset_t *ignored)
{
FILE *procfile;
char buffer[MAXPATHLEN], fname[MAXPATHLEN];
obstack_init (&obstack);
obstack_grow_str (&obstack, "<osdata type=\"types\">\n");
- obstack_xml_printf (
- &obstack,
+ obstack_xml_printf (&obstack,
"<item>"
"<column name=\"Type\">processes</column>"
- "<column name=\"Description\">Listing of all processes</column>"
+ "<column name=\"Description\">"
+ "Listing of all processes</column>"
"</item>");
obstack_grow_str0 (&obstack, "</osdata>\n");
if (debug_linux_nat)
{
if (find_thread_ptid (lwp->ptid)->stop_requested)
- fprintf_unfiltered (gdb_stdlog, "\
-LNSL: already stopped/stop_requested %s\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "LNSL: already stopped/stop_requested %s\n",
target_pid_to_str (lwp->ptid));
else
- fprintf_unfiltered (gdb_stdlog, "\
-LNSL: already stopped/no stop_requested yet %s\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "LNSL: already stopped/no "
+ "stop_requested yet %s\n",
target_pid_to_str (lwp->ptid));
}
}
projects / deliverable / binutils-gdb.git / blobdiff