/* Generic remote debugging interface for simulators.
- Copyright (C) 1993-2018 Free Software Foundation, Inc.
+ Copyright (C) 1993-2019 Free Software Foundation, Inc.
Contributed by Cygnus Support.
Steve Chamberlain (sac@cygnus.com).
#include <setjmp.h>
#include "terminal.h"
#include "target.h"
+#include "process-stratum-target.h"
#include "gdbcore.h"
#include "gdb/callback.h"
#include "gdb/remote-sim.h"
#include "arch-utils.h"
#include "readline/readline.h"
#include "gdbthread.h"
-#include "common/byte-vector.h"
+#include "gdbsupport/byte-vector.h"
/* Prototypes */
static void gdb_os_error (host_callback *, const char *, ...)
ATTRIBUTE_NORETURN;
-void simulator_command (char *args, int from_tty);
-
/* Naming convention:
sim_* are the interface to the simulator (see remote-sim.h).
gdbsim_* are stuff which is internal to gdb. */
+static const target_info gdbsim_target_info = {
+ "sim",
+ N_("simulator"),
+ N_("Use the compiled-in simulator.")
+};
+
struct gdbsim_target final
- : public memory_breakpoint_target<target_ops>
+ : public memory_breakpoint_target<process_stratum_target>
{
- gdbsim_target ()
- { to_stratum = process_stratum; }
-
- const char *shortname () override
- { return "sim"; }
+ gdbsim_target () = default;
- const char *longname () override
- { return _("simulator"); }
+ const target_info &info () const override
+ { return gdbsim_target_info; }
- const char *doc () override
- { return _("Use the compiled-in simulator."); }
-
- void open (const char *, int) override;
void close () override;
void detach (inferior *inf, int) override;
void interrupt () override;
- int thread_alive (ptid_t ptid) override;
-
- const char *pid_to_str (ptid_t) override;
-
- int has_all_memory () override;
- int has_memory () override;
-
- int has_stack () override
- { return default_child_has_stack (); }
+ bool thread_alive (ptid_t ptid) override;
- int has_registers () override
- { return default_child_has_registers (); }
+ std::string pid_to_str (ptid_t) override;
- int has_execution (ptid_t ptid) override
- { return default_child_has_execution (ptid); }
+ bool has_all_memory () override;
+ bool has_memory () override;
};
static struct gdbsim_target gdbsim_ops;
-static const struct inferior_data *sim_inferior_data_key;
+/* Value of the next pid to allocate for an inferior. As indicated
+ elsewhere, its initial value is somewhat arbitrary; it's critical
+ though that it's not zero or negative. */
+static int next_pid;
+#define INITIAL_PID 42000
/* Simulator-specific, per-inferior state. */
struct sim_inferior_data {
+ explicit sim_inferior_data (SIM_DESC desc)
+ : gdbsim_desc (desc),
+ remote_sim_ptid (next_pid, 0, next_pid)
+ {
+ ++next_pid;
+ }
+
+ ~sim_inferior_data ();
+
/* Flag which indicates whether or not the program has been loaded. */
- int program_loaded;
+ int program_loaded = 0;
/* Simulator descriptor for this inferior. */
SIM_DESC gdbsim_desc;
ptid_t remote_sim_ptid;
/* Signal with which to resume. */
- enum gdb_signal resume_siggnal;
+ enum gdb_signal resume_siggnal = GDB_SIGNAL_0;
/* Flag which indicates whether resume should step or not. */
- int resume_step;
+ int resume_step = 0;
};
+static inferior_key<sim_inferior_data> sim_inferior_data_key;
+
/* Flag indicating the "open" status of this module. It's set to 1
in gdbsim_open() and 0 in gdbsim_close(). */
static int gdbsim_is_open = 0;
-/* Value of the next pid to allocate for an inferior. As indicated
- elsewhere, its initial value is somewhat arbitrary; it's critical
- though that it's not zero or negative. */
-static int next_pid;
-#define INITIAL_PID 42000
-
/* Argument list to pass to sim_open(). It is allocated in gdbsim_open()
and deallocated in gdbsim_close(). The lifetime needs to extend beyond
the call to gdbsim_open() due to the fact that other sim instances other
struct sim_inferior_data *sim_data;
SIM_DESC new_sim_desc = (SIM_DESC) arg;
- sim_data = ((struct sim_inferior_data *)
- inferior_data (inf, sim_inferior_data_key));
+ sim_data = sim_inferior_data_key.get (inf);
return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc);
}
get_sim_inferior_data (struct inferior *inf, int sim_instance_needed)
{
SIM_DESC sim_desc = NULL;
- struct sim_inferior_data *sim_data
- = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key);
+ struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf);
/* Try to allocate a new sim instance, if needed. We do this ahead of
a potential allocation of a sim_inferior_data struct in order to
if (sim_data == NULL)
{
- sim_data = XCNEW(struct sim_inferior_data);
- set_inferior_data (inf, sim_inferior_data_key, sim_data);
-
- /* Allocate a ptid for this inferior. */
- sim_data->remote_sim_ptid = ptid_build (next_pid, 0, next_pid);
- next_pid++;
-
- /* Initialize the other instance variables. */
- sim_data->program_loaded = 0;
- sim_data->gdbsim_desc = sim_desc;
- sim_data->resume_siggnal = GDB_SIGNAL_0;
- sim_data->resume_step = 0;
+ sim_data = sim_inferior_data_key.emplace (inf, sim_desc);
}
else if (sim_desc)
{
get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed)
{
struct inferior *inf;
- int pid = ptid_get_pid (ptid);
+ int pid = ptid.pid ();
if (pid <= 0)
return NULL;
/* Free the per-inferior simulator data. */
-static void
-sim_inferior_data_cleanup (struct inferior *inf, void *data)
+sim_inferior_data::~sim_inferior_data ()
{
- struct sim_inferior_data *sim_data = (struct sim_inferior_data *) data;
-
- if (sim_data != NULL)
- {
- if (sim_data->gdbsim_desc)
- {
- sim_close (sim_data->gdbsim_desc, 0);
- sim_data->gdbsim_desc = NULL;
- }
- xfree (sim_data);
- }
+ if (gdbsim_desc)
+ sim_close (gdbsim_desc, 0);
}
static void
static int
gdb_os_write_stdout (host_callback *p, const char *buf, int len)
{
- int i;
- char b[2];
-
ui_file_write (gdb_stdtarg, buf, len);
return len;
}
gdbsim_target::fetch_registers (struct regcache *regcache, int regno)
{
struct gdbarch *gdbarch = regcache->arch ();
- struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache));
+ struct inferior *inf = find_inferior_ptid (regcache->ptid ());
struct sim_inferior_data *sim_data
= get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED);
gdbsim_target::store_registers (struct regcache *regcache, int regno)
{
struct gdbarch *gdbarch = regcache->arch ();
- struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache));
+ struct inferior *inf = find_inferior_ptid (regcache->ptid ());
struct sim_inferior_data *sim_data
= get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED);
(exec_file ? exec_file : "(NULL)"),
args);
- if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid))
+ if (inferior_ptid == sim_data->remote_sim_ptid)
kill ();
remove_breakpoints ();
init_wait_for_inferior ();
built_argv.reset (arg_buf);
}
- if (!have_inferiors ())
- init_thread_list ();
-
if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd,
built_argv.get (), env)
!= SIM_RC_OK)
error (_("Unable to create sim inferior."));
inferior_ptid = sim_data->remote_sim_ptid;
- inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid));
+ inferior_appeared (current_inferior (), inferior_ptid.pid ());
add_thread_silent (inferior_ptid);
insert_breakpoints (); /* Needed to get correct instruction
Targets should supply this routine, if only to provide an error message. */
/* Called when selecting the simulator. E.g. (gdb) target sim name. */
-void
-gdbsim_target::open (const char *args, int from_tty)
+static void
+gdbsim_target_open (const char *args, int from_tty)
{
int len;
char *arg_buf;
}
gdb_argv argv (arg_buf);
- sim_argv = argv.get ();
+ sim_argv = argv.release ();
init_callbacks ();
gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv);
if (gdbsim_desc == 0)
{
+ freeargv (sim_argv);
sim_argv = NULL;
error (_("unable to create simulator instance"));
}
- argv.release ();
-
/* Reset the pid numberings for this batch of sim instances. */
next_pid = INITIAL_PID;
static int
gdbsim_close_inferior (struct inferior *inf, void *arg)
{
- struct sim_inferior_data *sim_data
- = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key);
+ struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf);
if (sim_data != NULL)
{
ptid_t ptid = sim_data->remote_sim_ptid;
- sim_inferior_data_cleanup (inf, sim_data);
- set_inferior_data (inf, sim_inferior_data_key, NULL);
+ sim_inferior_data_key.clear (inf);
/* Having a ptid allocated and stored in remote_sim_ptid does
not mean that a corresponding inferior was ever created.
void
gdbsim_target::close ()
{
- struct sim_inferior_data *sim_data
- = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED);
-
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n");
if (sim_data)
gdbsim_resume_inferior (find_inferior_ptid (ptid), &rd);
- else if (ptid_equal (ptid, minus_one_ptid))
+ else if (ptid == minus_one_ptid)
iterate_over_inferiors (gdbsim_resume_inferior, &rd);
else
error (_("The program is not being run."));
/* This target isn't able to (yet) resume more than one inferior at a time.
When ptid is minus_one_ptid, just use the current inferior. If we're
given an explicit pid, we'll try to find it and use that instead. */
- if (ptid_equal (ptid, minus_one_ptid))
+ if (ptid == minus_one_ptid)
sim_data = get_sim_inferior_data (current_inferior (),
SIM_INSTANCE_NEEDED);
else
sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED);
if (sim_data == NULL)
error (_("Unable to wait for pid %d. Inferior not found."),
- ptid_get_pid (ptid));
+ ptid.pid ());
inferior_ptid = ptid;
}
void
gdbsim_target::mourn_inferior ()
{
- struct sim_inferior_data *sim_data
- = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED);
-
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n");
remove_breakpoints ();
generic_mourn_inferior ();
- delete_thread_silent (sim_data->remote_sim_ptid);
}
/* Pass the command argument through to the simulator verbatim. The
simulator must do any command interpretation work. */
-void
+static void
simulator_command (const char *args, int from_tty)
{
struct sim_inferior_data *sim_data;
thus allocating memory that would not be garbage collected until
the ultimate destruction of the associated inferior. */
- sim_data = ((struct sim_inferior_data *)
- inferior_data (current_inferior (), sim_inferior_data_key));
+ sim_data = sim_inferior_data_key.get (current_inferior ());
if (sim_data == NULL || sim_data->gdbsim_desc == NULL)
{
{
struct sim_inferior_data *sim_data;
- sim_data = ((struct sim_inferior_data *)
- inferior_data (current_inferior (), sim_inferior_data_key));
+ sim_data = sim_inferior_data_key.get (current_inferior ());
if (sim_data == NULL || sim_data->gdbsim_desc == NULL)
return;
/* Check to see if a thread is still alive. */
-int
+bool
gdbsim_target::thread_alive (ptid_t ptid)
{
struct sim_inferior_data *sim_data
= get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED);
if (sim_data == NULL)
- return 0;
+ return false;
- if (ptid_equal (ptid, sim_data->remote_sim_ptid))
+ if (ptid == sim_data->remote_sim_ptid)
/* The simulators' task is always alive. */
- return 1;
+ return true;
- return 0;
+ return false;
}
-/* Convert a thread ID to a string. Returns the string in a static
- buffer. */
+/* Convert a thread ID to a string. */
-const char *
+std::string
gdbsim_target::pid_to_str (ptid_t ptid)
{
return normal_pid_to_str (ptid);
/* Simulator memory may be accessed after the program has been loaded. */
-int
+bool
gdbsim_target::has_all_memory ()
{
struct sim_inferior_data *sim_data
= get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED);
if (!sim_data->program_loaded)
- return 0;
+ return false;
- return 1;
+ return true;
}
-int
+bool
gdbsim_target::has_memory ()
{
struct sim_inferior_data *sim_data
= get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED);
if (!sim_data->program_loaded)
- return 0;
+ return false;
- return 1;
+ return true;
}
void
{
struct cmd_list_element *c;
- add_target (&gdbsim_ops);
+ add_target (gdbsim_target_info, gdbsim_target_open);
c = add_com ("sim", class_obscure, simulator_command,
_("Send a command to the simulator."));
set_cmd_completer (c, sim_command_completer);
-
- sim_inferior_data_key
- = register_inferior_data_with_cleanup (NULL, sim_inferior_data_cleanup);
}
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