/* Multi-process/thread control for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1993
+ Copyright 1986, 1987, 1988, 1993, 1998
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "environ.h"
#include "value.h"
#include "target.h"
-#include "thread.h"
+#include "gdbthread.h"
#include "command.h"
+#include "gdbcmd.h"
+#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
-/*#include "lynxos-core.h"*/
+/*#include "lynxos-core.h" */
struct thread_info
-{
- struct thread_info *next;
- int pid; /* Actual process id */
- int num; /* Convenient handle */
-};
+ {
+ struct thread_info *next;
+ int pid; /* Actual process id */
+ int num; /* Convenient handle */
+ CORE_ADDR prev_pc; /* State from wait_for_inferior */
+ CORE_ADDR prev_func_start;
+ char *prev_func_name;
+ struct breakpoint *step_resume_breakpoint;
+ struct breakpoint *through_sigtramp_breakpoint;
+ CORE_ADDR step_range_start;
+ CORE_ADDR step_range_end;
+ CORE_ADDR step_frame_address;
+ int trap_expected;
+ int handling_longjmp;
+ int another_trap;
+
+ /* This is set TRUE when a catchpoint of a shared library event
+ triggers. Since we don't wish to leave the inferior in the
+ solib hook when we report the event, we step the inferior
+ back to user code before stopping and reporting the event.
+ */
+ int stepping_through_solib_after_catch;
+
+ /* When stepping_through_solib_after_catch is TRUE, this is a
+ list of the catchpoints that should be reported as triggering
+ when we finally do stop stepping.
+ */
+ bpstat stepping_through_solib_catchpoints;
+
+ /* This is set to TRUE when this thread is in a signal handler
+ trampoline and we're single-stepping through it */
+ int stepping_through_sigtramp;
+
+ };
+
+/* Prototypes for exported functions. */
+
+void _initialize_thread PARAMS ((void));
+
+/* Prototypes for local functions. */
static struct thread_info *thread_list = NULL;
static int highest_thread_num;
-static void thread_command PARAMS ((char * tidstr, int from_tty));
+static struct thread_info *find_thread_id PARAMS ((int num));
+static void thread_command PARAMS ((char *tidstr, int from_tty));
+static void thread_apply_all_command PARAMS ((char *, int));
+static int thread_alive PARAMS ((struct thread_info *));
+static void info_threads_command PARAMS ((char *, int));
+static void thread_apply_command PARAMS ((char *, int));
+static void restore_current_thread PARAMS ((int));
+static void switch_to_thread PARAMS ((int pid));
static void prune_threads PARAMS ((void));
-static void thread_switch PARAMS ((int pid));
-
void
init_thread_list ()
{
tp->pid = pid;
tp->num = ++highest_thread_num;
+ tp->prev_pc = 0;
+ tp->prev_func_start = 0;
+ tp->prev_func_name = NULL;
+ tp->step_range_start = 0;
+ tp->step_range_end = 0;
+ tp->step_frame_address = 0;
+ tp->step_resume_breakpoint = 0;
+ tp->through_sigtramp_breakpoint = 0;
+ tp->handling_longjmp = 0;
+ tp->trap_expected = 0;
+ tp->another_trap = 0;
+ tp->stepping_through_solib_after_catch = 0;
+ tp->stepping_through_solib_catchpoints = NULL;
+ tp->stepping_through_sigtramp = 0;
tp->next = thread_list;
thread_list = tp;
}
+void
+delete_thread (pid)
+ int pid;
+{
+ struct thread_info *tp, *tpprev;
+
+ tpprev = NULL;
+
+ for (tp = thread_list; tp; tpprev = tp, tp = tp->next)
+ if (tp->pid == pid)
+ break;
+
+ if (!tp)
+ return;
+
+ if (tpprev)
+ tpprev->next = tp->next;
+ else
+ thread_list = tp->next;
+
+ /* NOTE: this will take care of any left-over step_resume breakpoints,
+ but not any user-specified thread-specific breakpoints. */
+ if (tp->step_resume_breakpoint)
+ delete_breakpoint (tp->step_resume_breakpoint);
+
+ free (tp);
+
+ return;
+}
+
static struct thread_info *
find_thread_id (num)
- int num;
+ int num;
{
struct thread_info *tp;
return NULL;
}
+int
+valid_thread_id (num)
+ int num;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->num == num)
+ return 1;
+
+ return 0;
+}
+
+int
+pid_to_thread_id (pid)
+ int pid;
+{
+ struct thread_info *tp;
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (tp->pid == pid)
+ return tp->num;
+
+ return 0;
+}
+
+int
+thread_id_to_pid (num)
+ int num;
+{
+ struct thread_info *thread = find_thread_id (num);
+ if (thread)
+ return thread->pid;
+ else
+ return -1;
+}
+
int
in_thread_list (pid)
- int pid;
+ int pid;
{
struct thread_info *tp;
return 0; /* Never heard of 'im */
}
-static void
-prune_threads ()
+/* Load infrun state for the thread PID. */
+
+void
+load_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
+ trap_expected, step_resume_breakpoint,
+ through_sigtramp_breakpoint, step_range_start,
+ step_range_end, step_frame_address,
+ handling_longjmp, another_trap,
+ stepping_through_solib_after_catch,
+ stepping_through_solib_catchpoints,
+ stepping_through_sigtramp)
+ int pid;
+ CORE_ADDR *prev_pc;
+ CORE_ADDR *prev_func_start;
+ char **prev_func_name;
+ int *trap_expected;
+ struct breakpoint **step_resume_breakpoint;
+ struct breakpoint **through_sigtramp_breakpoint;
+ CORE_ADDR *step_range_start;
+ CORE_ADDR *step_range_end;
+ CORE_ADDR *step_frame_address;
+ int *handling_longjmp;
+ int *another_trap;
+ int *stepping_through_solib_after_catch;
+ bpstat *stepping_through_solib_catchpoints;
+ int *stepping_through_sigtramp;
{
- struct thread_info *tp, *tpprev;
+ struct thread_info *tp;
- tpprev = 0;
+ /* If we can't find the thread, then we're debugging a single threaded
+ process. No need to do anything in that case. */
+ tp = find_thread_id (pid_to_thread_id (pid));
+ if (tp == NULL)
+ return;
- for (tp = thread_list; tp; tp = tp->next)
- if (tp->pid == -1)
- {
- if (tpprev)
- tpprev->next = tp->next;
- else
- thread_list = NULL;
+ *prev_pc = tp->prev_pc;
+ *prev_func_start = tp->prev_func_start;
+ *prev_func_name = tp->prev_func_name;
+ *step_resume_breakpoint = tp->step_resume_breakpoint;
+ *step_range_start = tp->step_range_start;
+ *step_range_end = tp->step_range_end;
+ *step_frame_address = tp->step_frame_address;
+ *through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint;
+ *handling_longjmp = tp->handling_longjmp;
+ *trap_expected = tp->trap_expected;
+ *another_trap = tp->another_trap;
+ *stepping_through_solib_after_catch = tp->stepping_through_solib_after_catch;
+ *stepping_through_solib_catchpoints = tp->stepping_through_solib_catchpoints;
+ *stepping_through_sigtramp = tp->stepping_through_sigtramp;
+}
- free (tp);
- }
- else
- tpprev = tp;
+/* Save infrun state for the thread PID. */
+
+void
+save_infrun_state (pid, prev_pc, prev_func_start, prev_func_name,
+ trap_expected, step_resume_breakpoint,
+ through_sigtramp_breakpoint, step_range_start,
+ step_range_end, step_frame_address,
+ handling_longjmp, another_trap,
+ stepping_through_solib_after_catch,
+ stepping_through_solib_catchpoints,
+ stepping_through_sigtramp)
+ int pid;
+ CORE_ADDR prev_pc;
+ CORE_ADDR prev_func_start;
+ char *prev_func_name;
+ int trap_expected;
+ struct breakpoint *step_resume_breakpoint;
+ struct breakpoint *through_sigtramp_breakpoint;
+ CORE_ADDR step_range_start;
+ CORE_ADDR step_range_end;
+ CORE_ADDR step_frame_address;
+ int handling_longjmp;
+ int another_trap;
+ int stepping_through_solib_after_catch;
+ bpstat stepping_through_solib_catchpoints;
+ int stepping_through_sigtramp;
+{
+ struct thread_info *tp;
+
+ /* If we can't find the thread, then we're debugging a single-threaded
+ process. Nothing to do in that case. */
+ tp = find_thread_id (pid_to_thread_id (pid));
+ if (tp == NULL)
+ return;
+
+ tp->prev_pc = prev_pc;
+ tp->prev_func_start = prev_func_start;
+ tp->prev_func_name = prev_func_name;
+ tp->step_resume_breakpoint = step_resume_breakpoint;
+ tp->step_range_start = step_range_start;
+ tp->step_range_end = step_range_end;
+ tp->step_frame_address = step_frame_address;
+ tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint;
+ tp->handling_longjmp = handling_longjmp;
+ tp->trap_expected = trap_expected;
+ tp->another_trap = another_trap;
+ tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch;
+ tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints;
+ tp->stepping_through_sigtramp = stepping_through_sigtramp;
+}
+
+/* Return true if TP is an active thread. */
+static int
+thread_alive (tp)
+ struct thread_info *tp;
+{
+ if (tp->pid == -1)
+ return 0;
+ if (!target_thread_alive (tp->pid))
+ {
+ tp->pid = -1; /* Mark it as dead */
+ return 0;
+ }
+ return 1;
+}
+
+static void
+prune_threads ()
+{
+ struct thread_info *tp, *tpprev, *next;
+
+ for (tp = thread_list; tp; tp = next)
+ {
+ next = tp->next;
+ if (!thread_alive (tp))
+ delete_thread (tp->pid);
+ }
}
-/* Print information about currently known threads */
+/* Print information about currently known threads
+
+ * Note: this has the drawback that it _really_ switches
+ * threads, which frees the frame cache. A no-side
+ * effects info-threads command would be nicer.
+ */
static void
info_threads_command (arg, from_tty)
int from_tty;
{
struct thread_info *tp;
- int current_pid = inferior_pid;
+ int current_pid;
+ struct frame_info *cur_frame;
+ int saved_frame_level = selected_frame_level;
+ int counter;
+
+ /* Avoid coredumps which would happen if we tried to access a NULL
+ selected_frame. */
+ if (!target_has_stack)
+ error ("No stack.");
+ prune_threads ();
+ target_find_new_threads ();
+ current_pid = inferior_pid;
for (tp = thread_list; tp; tp = tp->next)
{
- if (target_has_execution
- && kill (tp->pid, 0) == -1)
- {
- tp->pid = -1; /* Mark it as dead */
- continue;
- }
-
if (tp->pid == current_pid)
printf_filtered ("* ");
else
printf_filtered (" ");
+#ifdef HPUXHPPA
+ printf_filtered ("%d %s ", tp->num, target_tid_to_str (tp->pid));
+#else
printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid));
+#endif
+ switch_to_thread (tp->pid);
+ if (selected_frame)
+ print_only_stack_frame (selected_frame, -1, 0);
+ else
+ printf_filtered ("[No stack.]\n");
+ }
- thread_switch (tp->pid);
+ switch_to_thread (current_pid);
+
+ /* Code below copied from "up_silently_base" in "stack.c".
+ * It restores the frame set by the user before the "info threads"
+ * command. We have finished the info-threads display by switching
+ * back to the current thread. That switch has put us at the top
+ * of the stack (leaf frame).
+ */
+ counter = saved_frame_level;
+ cur_frame = find_relative_frame (selected_frame, &counter);
+ if (counter != 0)
+ {
+ /* Ooops, can't restore, tell user where we are. */
+ warning ("Couldn't restore frame in current thread, at frame 0");
print_stack_frame (selected_frame, -1, 0);
}
+ else
+ {
+ select_frame (cur_frame, saved_frame_level);
+ }
- thread_switch (current_pid);
- prune_threads ();
+ /* re-show current frame. */
+ show_stack_frame (cur_frame);
}
/* Switch from one thread to another. */
static void
-thread_switch (pid)
+switch_to_thread (pid)
int pid;
{
if (pid == inferior_pid)
inferior_pid = pid;
flush_cached_frames ();
registers_changed ();
- stop_pc = read_pc();
- set_current_frame (create_new_frame (read_fp (), stop_pc));
- stop_frame_address = FRAME_FP (get_current_frame ());
+ stop_pc = read_pc ();
select_frame (get_current_frame (), 0);
}
+static void
+restore_current_thread (pid)
+ int pid;
+{
+ if (pid != inferior_pid)
+ {
+ switch_to_thread (pid);
+ print_stack_frame (get_current_frame (), 0, -1);
+ }
+}
+
+/* Apply a GDB command to a list of threads. List syntax is a whitespace
+ seperated list of numbers, or ranges, or the keyword `all'. Ranges consist
+ of two numbers seperated by a hyphen. Examples:
+
+ thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4
+ thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9
+ thread apply all p x/i $pc Apply x/i $pc cmd to all threads
+ */
+
+static void
+thread_apply_all_command (cmd, from_tty)
+ char *cmd;
+ int from_tty;
+{
+ struct thread_info *tp;
+ struct cleanup *old_chain;
+
+ if (cmd == NULL || *cmd == '\000')
+ error ("Please specify a command following the thread ID list");
+
+ old_chain = make_cleanup ((make_cleanup_func) restore_current_thread,
+ (void *) inferior_pid);
+
+ for (tp = thread_list; tp; tp = tp->next)
+ if (thread_alive (tp))
+ {
+ switch_to_thread (tp->pid);
+#ifdef HPUXHPPA
+ printf_filtered ("\nThread %d (%s):\n",
+ tp->num,
+ target_tid_to_str (inferior_pid));
+#else
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_pid_to_str (inferior_pid));
+#endif
+ execute_command (cmd, from_tty);
+ }
+}
+
+static void
+thread_apply_command (tidlist, from_tty)
+ char *tidlist;
+ int from_tty;
+{
+ char *cmd;
+ char *p;
+ struct cleanup *old_chain;
+
+ if (tidlist == NULL || *tidlist == '\000')
+ error ("Please specify a thread ID list");
+
+ for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++);
+
+ if (*cmd == '\000')
+ error ("Please specify a command following the thread ID list");
+
+ old_chain = make_cleanup ((make_cleanup_func) restore_current_thread,
+ (void *) inferior_pid);
+
+ while (tidlist < cmd)
+ {
+ struct thread_info *tp;
+ int start, end;
+
+ start = strtol (tidlist, &p, 10);
+ if (p == tidlist)
+ error ("Error parsing %s", tidlist);
+ tidlist = p;
+
+ while (*tidlist == ' ' || *tidlist == '\t')
+ tidlist++;
+
+ if (*tidlist == '-') /* Got a range of IDs? */
+ {
+ tidlist++; /* Skip the - */
+ end = strtol (tidlist, &p, 10);
+ if (p == tidlist)
+ error ("Error parsing %s", tidlist);
+ tidlist = p;
+
+ while (*tidlist == ' ' || *tidlist == '\t')
+ tidlist++;
+ }
+ else
+ end = start;
+
+ for (; start <= end; start++)
+ {
+ tp = find_thread_id (start);
+
+ if (!tp)
+ warning ("Unknown thread %d.", start);
+ else if (!thread_alive (tp))
+ warning ("Thread %d has terminated.", start);
+ else
+ {
+ switch_to_thread (tp->pid);
+#ifdef HPUXHPPA
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_tid_to_str (inferior_pid));
+#else
+ printf_filtered ("\nThread %d (%s):\n", tp->num,
+ target_pid_to_str (inferior_pid));
+#endif
+ execute_command (cmd, from_tty);
+ }
+ }
+ }
+}
+
+/* Switch to the specified thread. Will dispatch off to thread_apply_command
+ if prefix of arg is `apply'. */
+
static void
thread_command (tidstr, from_tty)
char *tidstr;
struct thread_info *tp;
if (!tidstr)
- error ("Please specify a thread ID. Use the \"info threads\" command to\n\
-see the IDs of currently known threads.");
-
-
+ {
+ /* Don't generate an error, just say which thread is current. */
+ if (target_has_stack)
+ printf_filtered ("[Current thread is %d (%s)]\n",
+ pid_to_thread_id (inferior_pid),
+#if defined(HPUXHPPA)
+ target_tid_to_str (inferior_pid)
+#else
+ target_pid_to_str (inferior_pid)
+#endif
+ );
+ else
+ error ("No stack.");
+ return;
+ }
num = atoi (tidstr);
tp = find_thread_id (num);
error ("Thread ID %d not known. Use the \"info threads\" command to\n\
see the IDs of currently known threads.", num);
- thread_switch (tp->pid);
+ if (!thread_alive (tp))
+ error ("Thread ID %d has terminated.\n", num);
- printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid));
+ switch_to_thread (tp->pid);
+
+ if (context_hook)
+ context_hook (num);
+
+ printf_filtered ("[Switching to thread %d (%s)]\n",
+ pid_to_thread_id (inferior_pid),
+#if defined(HPUXHPPA)
+ target_tid_to_str (inferior_pid)
+#else
+ target_pid_to_str (inferior_pid)
+#endif
+ );
print_stack_frame (selected_frame, selected_frame_level, 1);
}
+/* Commands with a prefix of `thread'. */
+struct cmd_list_element *thread_cmd_list = NULL;
+
void
_initialize_thread ()
{
+ static struct cmd_list_element *thread_apply_list = NULL;
+
add_info ("threads", info_threads_command,
"IDs of currently known threads.");
- add_com ("thread", class_info, thread_command,
- "Use this command to switch between threads.\n\
-The new thread ID must be currently known.");
+
+ add_prefix_cmd ("thread", class_run, thread_command,
+ "Use this command to switch between threads.\n\
+The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1,
+ &cmdlist);
+
+ add_prefix_cmd ("apply", class_run, thread_apply_command,
+ "Apply a command to a list of threads.",
+ &thread_apply_list, "apply ", 1, &thread_cmd_list);
+
+ add_cmd ("all", class_run, thread_apply_all_command,
+ "Apply a command to all threads.",
+ &thread_apply_list);
+
+ if (!xdb_commands)
+ add_com_alias ("t", "thread", class_run, 1);
}
projects / deliverable / binutils-gdb.git / blobdiff