void reachability_treet::create_next_state(void) { execution_statet &ex_state = get_cur_state(); if (next_thread_id != ex_state.threads_state.size()) { auto new_state = ex_state.clone(); execution_states.push_back(new_state); //begin - H.Savino if (round_robin) { if(next_thread_id == ex_state.active_thread) new_state->increment_time_slice(); else new_state->reset_time_slice(); } //end - H.Savino /* Make it active, make it follow on from previous state... */ if (new_state->get_active_state_number() != next_thread_id) new_state->increment_context_switch(); new_state->switch_to_thread(next_thread_id); new_state->update_after_switch_point(); } return; }
/* we can make some assumptions here: * - we are not the idle thread * - we know that we don't activate ourself * --> save time :-))) */ INLINE void ipc_switch_to_thread(tcb_t * current, tcb_t * tcb) { #if defined(CONFIG_DEBUG_TRACE_MISC) //printf("ipc_switch_to_thread(%x->%x)\n", current, tcb); #endif ASSERT(current->cpu == tcb->cpu); switch_to_thread(tcb, current); }
static PyObject * thpy_switch (PyObject *self, PyObject *args) { thread_object *thread_obj = (thread_object *) self; volatile struct gdb_exception except; THPY_REQUIRE_VALID (thread_obj); TRY_CATCH (except, RETURN_MASK_ALL) { switch_to_thread (thread_obj->thread->ptid); }
static void schedule(struct thread *t) { struct thread *current = current_thread(); /* If t is NULL need to find new runnable thread. */ if (t == NULL) { if (thread_list_empty(&runnable_threads)) die("Runnable thread list is empty!\n"); t = pop_runnable(); } else { /* current is still runnable. */ push_runnable(current); } switch_to_thread(t->stack_current, ¤t->stack_current); }
static PyObject * thpy_switch (PyObject *self, PyObject *args) { thread_object *thread_obj = (thread_object *) self; THPY_REQUIRE_VALID (thread_obj); TRY { switch_to_thread (thread_obj->thread->ptid); } CATCH (except, RETURN_MASK_ALL) { GDB_PY_HANDLE_EXCEPTION (except); }
void switch_to_program_space_and_thread (program_space *pspace) { inferior *inf = find_inferior_for_program_space (pspace); if (inf != NULL && inf->pid != 0) { thread_info *tp = any_live_thread_of_inferior (inf); if (tp != NULL) { switch_to_thread (tp); /* Switching thread switches pspace implicitly. We're done. */ return; } } switch_to_no_thread (); set_current_program_space (pspace); }
void dispatch_thread(tcb_t * tcb) { tcb_t * current = get_current_tcb(); if (tcb == current) return; if (tcb == get_idle_tcb()) { printf("dispatch: switch to idle, current=%x, state=%x\n", current, current->thread_state); enter_kdebug("dispatch: switch to idle"); switch_to_idle(current); return; } //printf("dispatch: %p -> %p\n", current, tcb); /* Do not insert TCBS not in the ready queue into the prio_queue */ if (tcb->queue_state & TS_QUEUE_READY) prio_queue[tcb->priority] = tcb; //printf("switch_to %x->%x (%x)\n", current, tcb, tcb->thread_state); switch_to_thread(tcb, current); }
static void core_open (char *filename, int from_tty) { const char *p; int siggy; struct cleanup *old_chain; char *temp; bfd *temp_bfd; int scratch_chan; int flags; volatile struct gdb_exception except; target_preopen (from_tty); if (!filename) { if (core_bfd) error (_("No core file specified. (Use `detach' " "to stop debugging a core file.)")); else error (_("No core file specified.")); } filename = tilde_expand (filename); if (!IS_ABSOLUTE_PATH (filename)) { temp = concat (current_directory, "/", filename, (char *) NULL); xfree (filename); filename = temp; } old_chain = make_cleanup (xfree, filename); flags = O_BINARY | O_LARGEFILE; if (write_files) flags |= O_RDWR; else flags |= O_RDONLY; scratch_chan = open (filename, flags, 0); if (scratch_chan < 0) perror_with_name (filename); temp_bfd = bfd_fopen (filename, gnutarget, write_files ? FOPEN_RUB : FOPEN_RB, scratch_chan); if (temp_bfd == NULL) perror_with_name (filename); if (!bfd_check_format (temp_bfd, bfd_core) && !gdb_check_format (temp_bfd)) { /* Do it after the err msg */ /* FIXME: should be checking for errors from bfd_close (for one thing, on error it does not free all the storage associated with the bfd). */ make_cleanup_bfd_close (temp_bfd); error (_("\"%s\" is not a core dump: %s"), filename, bfd_errmsg (bfd_get_error ())); } /* Looks semi-reasonable. Toss the old core file and work on the new. */ discard_cleanups (old_chain); /* Don't free filename any more */ unpush_target (&core_ops); core_bfd = temp_bfd; old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); /* FIXME: kettenis/20031023: This is very dangerous. The CORE_GDBARCH that results from this call may very well be different from CURRENT_GDBARCH. However, its methods may only work if it is selected as the current architecture, because they rely on swapped data (see gdbarch.c). We should get rid of that swapped data. */ core_gdbarch = gdbarch_from_bfd (core_bfd); /* Find a suitable core file handler to munch on core_bfd */ core_vec = sniff_core_bfd (core_bfd); validate_files (); core_data = XZALLOC (struct target_section_table); /* Find the data section */ if (build_section_table (core_bfd, &core_data->sections, &core_data->sections_end)) error (_("\"%s\": Can't find sections: %s"), bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); /* If we have no exec file, try to set the architecture from the core file. We don't do this unconditionally since an exec file typically contains more information that helps us determine the architecture than a core file. */ if (!exec_bfd) set_gdbarch_from_file (core_bfd); push_target (&core_ops); discard_cleanups (old_chain); /* Do this before acknowledging the inferior, so if post_create_inferior throws (can happen easilly if you're loading a core file with the wrong exec), we aren't left with threads from the previous inferior. */ init_thread_list (); inferior_ptid = null_ptid; /* Need to flush the register cache (and the frame cache) from a previous debug session. If inferior_ptid ends up the same as the last debug session --- e.g., b foo; run; gcore core1; step; gcore core2; core core1; core core2 --- then there's potential for get_current_regcache to return the cached regcache of the previous session, and the frame cache being stale. */ registers_changed (); /* Build up thread list from BFD sections, and possibly set the current thread to the .reg/NN section matching the .reg section. */ bfd_map_over_sections (core_bfd, add_to_thread_list, bfd_get_section_by_name (core_bfd, ".reg")); if (ptid_equal (inferior_ptid, null_ptid)) { /* Either we found no .reg/NN section, and hence we have a non-threaded core (single-threaded, from gdb's perspective), or for some reason add_to_thread_list couldn't determine which was the "main" thread. The latter case shouldn't usually happen, but we're dealing with input here, which can always be broken in different ways. */ struct thread_info *thread = first_thread_of_process (-1); if (thread == NULL) { inferior_appeared (current_inferior (), CORELOW_PID); inferior_ptid = pid_to_ptid (CORELOW_PID); add_thread_silent (inferior_ptid); } else switch_to_thread (thread->ptid); } post_create_inferior (&core_ops, from_tty); /* Now go through the target stack looking for threads since there may be a thread_stratum target loaded on top of target core by now. The layer above should claim threads found in the BFD sections. */ TRY_CATCH (except, RETURN_MASK_ERROR) { target_find_new_threads (); } if (except.reason < 0) exception_print (gdb_stderr, except); p = bfd_core_file_failing_command (core_bfd); if (p) printf_filtered (_("Core was generated by `%s'.\n"), p); siggy = bfd_core_file_failing_signal (core_bfd); if (siggy > 0) { /* If we don't have a CORE_GDBARCH to work with, assume a native core (map gdb_signal from host signals). If we do have CORE_GDBARCH to work with, but no gdb_signal_from_target implementation for that gdbarch, as a fallback measure, assume the host signal mapping. It'll be correct for native cores, but most likely incorrect for cross-cores. */ enum gdb_signal sig = (core_gdbarch != NULL && gdbarch_gdb_signal_from_target_p (core_gdbarch) ? gdbarch_gdb_signal_from_target (core_gdbarch, siggy) : gdb_signal_from_host (siggy)); printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy, gdb_signal_to_string (sig)); } /* Fetch all registers from core file. */ target_fetch_registers (get_current_regcache (), -1); /* Now, set up the frame cache, and print the top of stack. */ reinit_frame_cache (); print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); }
void startup_inferior (int ntraps) { int pending_execs = ntraps; int terminal_initted = 0; ptid_t resume_ptid; if (target_supports_multi_process ()) resume_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); else resume_ptid = minus_one_ptid; /* The process was started by the fork that created it, but it will have stopped one instruction after execing the shell. Here we must get it up to actual execution of the real program. */ if (exec_wrapper) pending_execs++; while (1) { enum target_signal resume_signal = TARGET_SIGNAL_0; ptid_t event_ptid; struct target_waitstatus ws; memset (&ws, 0, sizeof (ws)); event_ptid = target_wait (resume_ptid, &ws, 0); if (ws.kind == TARGET_WAITKIND_IGNORE) /* The inferior didn't really stop, keep waiting. */ continue; switch (ws.kind) { case TARGET_WAITKIND_SPURIOUS: case TARGET_WAITKIND_LOADED: case TARGET_WAITKIND_FORKED: case TARGET_WAITKIND_VFORKED: case TARGET_WAITKIND_SYSCALL_ENTRY: case TARGET_WAITKIND_SYSCALL_RETURN: /* Ignore gracefully during startup of the inferior. */ switch_to_thread (event_ptid); break; case TARGET_WAITKIND_SIGNALLED: target_terminal_ours (); target_mourn_inferior (); error (_("During startup program terminated with signal %s, %s."), target_signal_to_name (ws.value.sig), target_signal_to_string (ws.value.sig)); return; case TARGET_WAITKIND_EXITED: target_terminal_ours (); target_mourn_inferior (); if (ws.value.integer) error (_("During startup program exited with code %d."), ws.value.integer); else error (_("During startup program exited normally.")); return; case TARGET_WAITKIND_EXECD: /* Handle EXEC signals as if they were SIGTRAP signals. */ xfree (ws.value.execd_pathname); resume_signal = TARGET_SIGNAL_TRAP; switch_to_thread (event_ptid); break; case TARGET_WAITKIND_STOPPED: resume_signal = ws.value.sig; switch_to_thread (event_ptid); break; } if (resume_signal != TARGET_SIGNAL_TRAP) { /* Let shell child handle its own signals in its own way. */ target_resume (resume_ptid, 0, resume_signal); } else { /* We handle SIGTRAP, however; it means child did an exec. */ if (!terminal_initted) { /* Now that the child has exec'd we know it has already set its process group. On POSIX systems, tcsetpgrp will fail with EPERM if we try it before the child's setpgid. */ /* Set up the "saved terminal modes" of the inferior based on what modes we are starting it with. */ target_terminal_init (); /* Install inferior's terminal modes. */ target_terminal_inferior (); terminal_initted = 1; } if (--pending_execs == 0) break; /* Just make it go on. */ target_resume (resume_ptid, 0, TARGET_SIGNAL_0); } } /* Mark all threads non-executing. */ set_executing (resume_ptid, 0); }
static void core_open (const char *arg, int from_tty) { const char *p; int siggy; struct cleanup *old_chain; char *temp; int scratch_chan; int flags; char *filename; target_preopen (from_tty); if (!arg) { if (core_bfd) error (_("No core file specified. (Use `detach' " "to stop debugging a core file.)")); else error (_("No core file specified.")); } filename = tilde_expand (arg); if (!IS_ABSOLUTE_PATH (filename)) { temp = concat (current_directory, "/", filename, (char *) NULL); xfree (filename); filename = temp; } old_chain = make_cleanup (xfree, filename); flags = O_BINARY | O_LARGEFILE; if (write_files) flags |= O_RDWR; else flags |= O_RDONLY; scratch_chan = gdb_open_cloexec (filename, flags, 0); if (scratch_chan < 0) perror_with_name (filename); gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename, gnutarget, write_files ? FOPEN_RUB : FOPEN_RB, scratch_chan)); if (temp_bfd == NULL) perror_with_name (filename); if (!bfd_check_format (temp_bfd.get (), bfd_core) && !gdb_check_format (temp_bfd.get ())) { /* Do it after the err msg */ /* FIXME: should be checking for errors from bfd_close (for one thing, on error it does not free all the storage associated with the bfd). */ error (_("\"%s\" is not a core dump: %s"), filename, bfd_errmsg (bfd_get_error ())); } /* Looks semi-reasonable. Toss the old core file and work on the new. */ do_cleanups (old_chain); unpush_target (&core_ops); core_bfd = temp_bfd.release (); old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/); core_gdbarch = gdbarch_from_bfd (core_bfd); /* Find a suitable core file handler to munch on core_bfd */ core_vec = sniff_core_bfd (core_bfd); validate_files (); core_data = XCNEW (struct target_section_table); /* Find the data section */ if (build_section_table (core_bfd, &core_data->sections, &core_data->sections_end)) error (_("\"%s\": Can't find sections: %s"), bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); /* If we have no exec file, try to set the architecture from the core file. We don't do this unconditionally since an exec file typically contains more information that helps us determine the architecture than a core file. */ if (!exec_bfd) set_gdbarch_from_file (core_bfd); push_target (&core_ops); discard_cleanups (old_chain); /* Do this before acknowledging the inferior, so if post_create_inferior throws (can happen easilly if you're loading a core file with the wrong exec), we aren't left with threads from the previous inferior. */ init_thread_list (); inferior_ptid = null_ptid; /* Need to flush the register cache (and the frame cache) from a previous debug session. If inferior_ptid ends up the same as the last debug session --- e.g., b foo; run; gcore core1; step; gcore core2; core core1; core core2 --- then there's potential for get_current_regcache to return the cached regcache of the previous session, and the frame cache being stale. */ registers_changed (); /* Build up thread list from BFD sections, and possibly set the current thread to the .reg/NN section matching the .reg section. */ bfd_map_over_sections (core_bfd, add_to_thread_list, bfd_get_section_by_name (core_bfd, ".reg")); if (ptid_equal (inferior_ptid, null_ptid)) { /* Either we found no .reg/NN section, and hence we have a non-threaded core (single-threaded, from gdb's perspective), or for some reason add_to_thread_list couldn't determine which was the "main" thread. The latter case shouldn't usually happen, but we're dealing with input here, which can always be broken in different ways. */ struct thread_info *thread = first_thread_of_process (-1); if (thread == NULL) { inferior_appeared (current_inferior (), CORELOW_PID); inferior_ptid = pid_to_ptid (CORELOW_PID); add_thread_silent (inferior_ptid); } else switch_to_thread (thread->ptid); } post_create_inferior (&core_ops, from_tty); /* Now go through the target stack looking for threads since there may be a thread_stratum target loaded on top of target core by now. The layer above should claim threads found in the BFD sections. */ TRY { target_update_thread_list (); } CATCH (except, RETURN_MASK_ERROR) { exception_print (gdb_stderr, except); }
void core_target_open (const char *arg, int from_tty) { const char *p; int siggy; int scratch_chan; int flags; target_preopen (from_tty); if (!arg) { if (core_bfd) error (_("No core file specified. (Use `detach' " "to stop debugging a core file.)")); else error (_("No core file specified.")); } gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg)); if (!IS_ABSOLUTE_PATH (filename.get ())) filename.reset (concat (current_directory, "/", filename.get (), (char *) NULL)); flags = O_BINARY | O_LARGEFILE; if (write_files) flags |= O_RDWR; else flags |= O_RDONLY; scratch_chan = gdb_open_cloexec (filename.get (), flags, 0); if (scratch_chan < 0) perror_with_name (filename.get ()); gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename.get (), gnutarget, write_files ? FOPEN_RUB : FOPEN_RB, scratch_chan)); if (temp_bfd == NULL) perror_with_name (filename.get ()); if (!bfd_check_format (temp_bfd.get (), bfd_core) && !gdb_check_format (temp_bfd.get ())) { /* Do it after the err msg */ /* FIXME: should be checking for errors from bfd_close (for one thing, on error it does not free all the storage associated with the bfd). */ error (_("\"%s\" is not a core dump: %s"), filename.get (), bfd_errmsg (bfd_get_error ())); } current_program_space->cbfd = std::move (temp_bfd); core_target *target = new core_target (); /* Own the target until it is successfully pushed. */ target_ops_up target_holder (target); validate_files (); /* If we have no exec file, try to set the architecture from the core file. We don't do this unconditionally since an exec file typically contains more information that helps us determine the architecture than a core file. */ if (!exec_bfd) set_gdbarch_from_file (core_bfd); push_target (std::move (target_holder)); inferior_ptid = null_ptid; /* Need to flush the register cache (and the frame cache) from a previous debug session. If inferior_ptid ends up the same as the last debug session --- e.g., b foo; run; gcore core1; step; gcore core2; core core1; core core2 --- then there's potential for get_current_regcache to return the cached regcache of the previous session, and the frame cache being stale. */ registers_changed (); /* Build up thread list from BFD sections, and possibly set the current thread to the .reg/NN section matching the .reg section. */ bfd_map_over_sections (core_bfd, add_to_thread_list, bfd_get_section_by_name (core_bfd, ".reg")); if (inferior_ptid == null_ptid) { /* Either we found no .reg/NN section, and hence we have a non-threaded core (single-threaded, from gdb's perspective), or for some reason add_to_thread_list couldn't determine which was the "main" thread. The latter case shouldn't usually happen, but we're dealing with input here, which can always be broken in different ways. */ thread_info *thread = first_thread_of_inferior (current_inferior ()); if (thread == NULL) { inferior_appeared (current_inferior (), CORELOW_PID); inferior_ptid = ptid_t (CORELOW_PID); add_thread_silent (inferior_ptid); } else switch_to_thread (thread); } post_create_inferior (target, from_tty); /* Now go through the target stack looking for threads since there may be a thread_stratum target loaded on top of target core by now. The layer above should claim threads found in the BFD sections. */ try { target_update_thread_list (); } catch (const gdb_exception_error &except) { exception_print (gdb_stderr, except); } p = bfd_core_file_failing_command (core_bfd); if (p) printf_filtered (_("Core was generated by `%s'.\n"), p); /* Clearing any previous state of convenience variables. */ clear_exit_convenience_vars (); siggy = bfd_core_file_failing_signal (core_bfd); if (siggy > 0) { gdbarch *core_gdbarch = target->core_gdbarch (); /* If we don't have a CORE_GDBARCH to work with, assume a native core (map gdb_signal from host signals). If we do have CORE_GDBARCH to work with, but no gdb_signal_from_target implementation for that gdbarch, as a fallback measure, assume the host signal mapping. It'll be correct for native cores, but most likely incorrect for cross-cores. */ enum gdb_signal sig = (core_gdbarch != NULL && gdbarch_gdb_signal_from_target_p (core_gdbarch) ? gdbarch_gdb_signal_from_target (core_gdbarch, siggy) : gdb_signal_from_host (siggy)); printf_filtered (_("Program terminated with signal %s, %s.\n"), gdb_signal_to_name (sig), gdb_signal_to_string (sig)); /* Set the value of the internal variable $_exitsignal, which holds the signal uncaught by the inferior. */ set_internalvar_integer (lookup_internalvar ("_exitsignal"), siggy); } /* Fetch all registers from core file. */ target_fetch_registers (get_current_regcache (), -1); /* Now, set up the frame cache, and print the top of stack. */ reinit_frame_cache (); print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); /* Current thread should be NUM 1 but the user does not know that. If a program is single threaded gdb in general does not mention anything about threads. That is why the test is >= 2. */ if (thread_count () >= 2) { try { thread_command (NULL, from_tty); } catch (const gdb_exception_error &except) { exception_print (gdb_stderr, except); } } }