/* Multi-process/thread control defs for GDB, the GNU debugger.
Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1997, 1998, 1999,
- 2000, 2007, 2008 Free Software Foundation, Inc.
+ 2000, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
#include "ui-out.h"
#include "inferior.h"
-struct thread_info
-{
- struct thread_info *next;
- ptid_t ptid; /* "Actual process id";
- In fact, this may be overloaded with
- kernel thread id, etc. */
- int num; /* Convenient handle (GDB thread id) */
+/* Inferior thread specific part of `struct infcall_control_state'.
- /* Non-zero means the thread is executing. Note: this is different
- from saying that there is an active target and we are stopped at
- a breakpoint, for instance. This is a real indicator whether the
- thread is off and running. */
- /* This field is internal to thread.c. Never access it directly,
- use is_executing instead. */
- int executing_;
-
- /* Frontend view of the thread state. Note that the RUNNING/STOPPED
- states are different from EXECUTING. When the thread is stopped
- internally while handling an internal event, like a software
- single-step breakpoint, EXECUTING will be false, but running will
- still be true. As a possible future extension, this could turn
- into enum { stopped, exited, stepping, finishing, until(ling),
- running ... } */
- /* This field is internal to thread.c. Never access it directly,
- use is_running instead. */
- int state_;
-
- /* If this is > 0, then it means there's code out there that relies
- on this thread being listed. Don't delete it from the lists even
- if we detect it exiting. */
- int refcount;
+ Inferior process counterpart is `struct inferior_control_state'. */
+struct thread_control_state
+{
/* User/external stepping state. */
/* Step-resume or longjmp-resume breakpoint. */
struct breakpoint *step_resume_breakpoint;
+ /* Exception-resume breakpoint. */
+ struct breakpoint *exception_resume_breakpoint;
+
/* Range to single step within.
If this is nonzero, respond to a single-step signal by continuing
This is how we know when we step into a subroutine call, and how
to set the frame for the breakpoint used to step out. */
struct frame_id step_frame_id;
- int current_line;
- struct symtab *current_symtab;
- /* Internal stepping state. */
-
- /* Record the pc of the thread the last time it stopped. This is
- maintained by proceed and keep_going, and used in
- adjust_pc_after_break to distinguish a hardware single-step
- SIGTRAP from a breakpoint SIGTRAP. */
- CORE_ADDR prev_pc;
+ /* Similarly, the frame ID of the underlying stack frame (skipping
+ any inlined frames). */
+ struct frame_id step_stack_frame_id;
/* Nonzero if we are presently stepping over a breakpoint.
by keep_going. */
int trap_expected;
+ /* Nonzero if the thread is being proceeded for a "finish" command
+ or a similar situation when stop_registers should be saved. */
+ int proceed_to_finish;
+
+ /* Nonzero if the thread is being proceeded for an inferior function
+ call. */
+ int in_infcall;
+
+ enum step_over_calls_kind step_over_calls;
+
+ /* Nonzero if stopped due to a step command. */
+ int stop_step;
+
+ /* Chain containing status of breakpoint(s) the thread stopped
+ at. */
+ bpstat stop_bpstat;
+};
+
+/* Inferior thread specific part of `struct infcall_suspend_state'.
+
+ Inferior process counterpart is `struct inferior_suspend_state'. */
+
+struct thread_suspend_state
+{
+ /* Last signal that the inferior received (why it stopped). */
+ enum target_signal stop_signal;
+};
+
+struct thread_info
+{
+ struct thread_info *next;
+ ptid_t ptid; /* "Actual process id";
+ In fact, this may be overloaded with
+ kernel thread id, etc. */
+ int num; /* Convenient handle (GDB thread id) */
+
+ /* Non-zero means the thread is executing. Note: this is different
+ from saying that there is an active target and we are stopped at
+ a breakpoint, for instance. This is a real indicator whether the
+ thread is off and running. */
+ /* This field is internal to thread.c. Never access it directly,
+ use is_executing instead. */
+ int executing_;
+
+ /* Frontend view of the thread state. Note that the RUNNING/STOPPED
+ states are different from EXECUTING. When the thread is stopped
+ internally while handling an internal event, like a software
+ single-step breakpoint, EXECUTING will be false, but running will
+ still be true. As a possible future extension, this could turn
+ into enum { stopped, exited, stepping, finishing, until(ling),
+ running ... } */
+ /* This field is internal to thread.c. Never access it directly,
+ use is_running instead. */
+ int state_;
+
+ /* If this is > 0, then it means there's code out there that relies
+ on this thread being listed. Don't delete it from the lists even
+ if we detect it exiting. */
+ int refcount;
+
+ /* State of GDB control of inferior thread execution.
+ See `struct thread_control_state'. */
+ struct thread_control_state control;
+
+ /* State of inferior thread to restore after GDB is done with an inferior
+ call. See `struct thread_suspend_state'. */
+ struct thread_suspend_state suspend;
+
+ int current_line;
+ struct symtab *current_symtab;
+
+ /* Internal stepping state. */
+
+ /* Record the pc of the thread the last time it stopped. This is
+ maintained by proceed and keep_going, and used in
+ adjust_pc_after_break to distinguish a hardware single-step
+ SIGTRAP from a breakpoint SIGTRAP. */
+ CORE_ADDR prev_pc;
+
/* Should we step over breakpoint next time keep_going is called? */
int stepping_over_breakpoint;
command. */
struct continuation *intermediate_continuations;
- /* Nonzero if the thread is being proceeded for a "finish" command
- or a similar situation when stop_registers should be saved. */
- int proceed_to_finish;
-
- enum step_over_calls_kind step_over_calls;
-
- /* Nonzero if stopped due to a step command. */
- int stop_step;
-
/* If stepping, nonzero means step count is > 1 so don't print frame
next time inferior stops if it stops due to stepping. */
int step_multi;
- /* Last signal that the inferior received (why it stopped). */
- enum target_signal stop_signal;
+ /* This is used to remember when a fork or vfork event was caught by
+ a catchpoint, and thus the event is to be followed at the next
+ resume of the thread, and not immediately. */
+ struct target_waitstatus pending_follow;
- /* Chain containing status of breakpoint(s) the thread stopped
- at. */
- bpstat stop_bpstat;
+ /* True if this thread has been explicitly requested to stop. */
+ int stop_requested;
+
+ /* The initiating frame of a nexting operation, used for deciding
+ which exceptions to intercept. */
+ struct frame_id initiating_frame;
/* Private data used by the target vector implementation. */
struct private_thread_info *private;
+
+ /* Function that is called to free PRIVATE. If this is NULL, then
+ xfree will be called on PRIVATE. */
+ void (*private_dtor) (struct private_thread_info *);
};
/* Create an empty thread list, or empty the existing one. */
/* Delete a step_resume_breakpoint from the thread database. */
extern void delete_step_resume_breakpoint (struct thread_info *);
+/* Delete an exception_resume_breakpoint from the thread database. */
+extern void delete_exception_resume_breakpoint (struct thread_info *);
+
/* Translate the integer thread id (GDB's homegrown id, not the system's)
into a "pid" (which may be overloaded with extra thread information). */
extern ptid_t thread_id_to_pid (int);
extern int valid_thread_id (int thread);
/* Search function to lookup a thread by 'pid'. */
-extern struct thread_info *find_thread_pid (ptid_t ptid);
+extern struct thread_info *find_thread_ptid (ptid_t ptid);
/* Find thread by GDB user-visible thread number. */
struct thread_info *find_thread_id (int num);
+/* Finds the first thread of the inferior given by PID. If PID is -1,
+ returns the first thread in the list. */
+struct thread_info *first_thread_of_process (int pid);
+
+/* Returns any thread of process PID. */
+extern struct thread_info *any_thread_of_process (int pid);
+
+/* Returns any non-exited thread of process PID, giving preference for
+ already stopped threads. */
+extern struct thread_info *any_live_thread_of_process (int pid);
+
/* Change the ptid of thread OLD_PTID to NEW_PTID. */
void thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid);
extern int thread_count (void);
-/* infrun context switch: save the debugger state for the given thread. */
-extern void save_infrun_state (ptid_t ptid);
-
-/* infrun context switch: load the debugger state previously saved
- for the given thread. */
-extern void load_infrun_state (ptid_t ptid);
-
/* Switch from one thread to another. */
extern void switch_to_thread (ptid_t ptid);
If PIDGET (PTID) is -1, marks all threads. */
extern void set_running (ptid_t ptid, int running);
+/* Marks or clears thread(s) PTID as having been requested to stop.
+ If PTID is MINUS_ONE_PTID, applies to all threads. If
+ ptid_is_pid(PTID) is true, applies to all threads of the process
+ pointed at by PTID. If STOP, then the THREAD_STOP_REQUESTED
+ observer is called with PTID as argument. */
+extern void set_stop_requested (ptid_t ptid, int stop);
+
/* NOTE: Since the thread state is not a boolean, most times, you do
not want to check it with negation. If you really want to check if
the thread is stopped,
/* Reports if thread PTID is executing. */
extern int is_executing (ptid_t ptid);
+/* Merge the executing property of thread PTID over to its thread
+ state property (frontend running/stopped view).
+
+ "not executing" -> "stopped"
+ "executing" -> "running"
+ "exited" -> "exited"
+
+ If PIDGET (PTID) is -1, go over all threads.
+
+ Notifications are only emitted if the thread state did change. */
+extern void finish_thread_state (ptid_t ptid);
+
+/* Same as FINISH_THREAD_STATE, but with an interface suitable to be
+ registered as a cleanup. PTID_P points to the ptid_t that is
+ passed to FINISH_THREAD_STATE. */
+extern void finish_thread_state_cleanup (void *ptid_p);
+
/* Commands with a prefix of `thread'. */
extern struct cmd_list_element *thread_cmd_list;
`set print thread-events'. */
extern int print_thread_events;
-extern void print_thread_info (struct ui_out *uiout, int thread);
+extern void print_thread_info (struct ui_out *uiout, int thread,
+ int pid);
extern struct cleanup *make_cleanup_restore_current_thread (void);
INFERIOR_PTID. INFERIOR_PTID *must* be in the thread list. */
extern struct thread_info* inferior_thread (void);
+extern void update_thread_list (void);
+
#endif /* GDBTHREAD_H */
projects / deliverable / binutils-gdb.git / blobdiff