/* Generic remote debugging interface for simulators.
- Copyright (C) 1993-2018 Free Software Foundation, Inc.
+ Copyright (C) 1993-2020 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;
-static void gdbsim_kill (struct target_ops *);
+/* Naming convention:
-static void gdbsim_load (struct target_ops *self, const char *prog,
- int fromtty);
+ sim_* are the interface to the simulator (see remote-sim.h).
+ gdbsim_* are stuff which is internal to gdb. */
-static void gdbsim_open (const char *args, int from_tty);
+static const target_info gdbsim_target_info = {
+ "sim",
+ N_("simulator"),
+ N_("Use the compiled-in simulator.")
+};
-static void gdbsim_close (struct target_ops *self);
+struct gdbsim_target final
+ : public memory_breakpoint_target<process_stratum_target>
+{
+ gdbsim_target () = default;
-static void gdbsim_detach (struct target_ops *ops, int from_tty);
+ const target_info &info () const override
+ { return gdbsim_target_info; }
-static void gdbsim_prepare_to_store (struct target_ops *self,
- struct regcache *regcache);
+ void close () override;
-static void gdbsim_files_info (struct target_ops *target);
+ void detach (inferior *inf, int) override;
-static void gdbsim_mourn_inferior (struct target_ops *target);
+ void resume (ptid_t, int, enum gdb_signal) override;
+ ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
-static void gdbsim_interrupt (struct target_ops *self, ptid_t ptid);
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+ void prepare_to_store (struct regcache *) override;
-void simulator_command (char *args, int from_tty);
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
-/* Naming convention:
+ void files_info () override;
- sim_* are the interface to the simulator (see remote-sim.h).
- gdbsim_* are stuff which is internal to gdb. */
+ void kill () override;
+
+ void load (const char *, int) override;
+
+ bool can_create_inferior () override { return true; }
+ void create_inferior (const char *, const std::string &,
+ char **, int) override;
+
+ void mourn_inferior () override;
-/* Forward data declarations */
-extern struct target_ops gdbsim_ops;
+ void interrupt () override;
-static const struct inferior_data *sim_inferior_data_key;
+ bool thread_alive (ptid_t ptid) override;
+
+ std::string pid_to_str (ptid_t) override;
+
+ bool has_all_memory () override;
+ bool has_memory () override;
+};
+
+static struct gdbsim_target gdbsim_ops;
+
+/* 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;
}
/* GDB version of printf_filtered callback. */
-static void
-gdb_os_printf_filtered (host_callback * p, const char *format,...)
+static void ATTRIBUTE_PRINTF (2, 3)
+gdb_os_printf_filtered (host_callback * p, const char *format, ...)
{
va_list args;
/* GDB version of error vprintf_filtered. */
-static void
+static void ATTRIBUTE_PRINTF (2, 0)
gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap)
{
vfprintf_filtered (gdb_stdout, format, ap);
/* GDB version of error evprintf_filtered. */
-static void
+static void ATTRIBUTE_PRINTF (2, 0)
gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap)
{
vfprintf_filtered (gdb_stderr, format, ap);
/* GDB version of error callback. */
-static void
+static void ATTRIBUTE_PRINTF (2, 3)
gdb_os_error (host_callback * p, const char *format, ...)
{
va_list args;
return regnum;
}
-static void
-gdbsim_fetch_register (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+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);
if (regno == -1)
{
for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
- gdbsim_fetch_register (ops, regcache, regno);
+ fetch_registers (regcache, regno);
return;
}
}
-static void
-gdbsim_store_register (struct target_ops *ops,
- struct regcache *regcache, int regno)
+void
+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);
if (regno == -1)
{
for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
- gdbsim_store_register (ops, regcache, regno);
+ store_registers (regcache, regno);
return;
}
else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0)
/* Kill the running program. This may involve closing any open files
and releasing other resources acquired by the simulated program. */
-static void
-gdbsim_kill (struct target_ops *ops)
+void
+gdbsim_target::kill ()
{
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n");
not only bring new code into the target process, but also to update
GDB's symbol tables to match. */
-static void
-gdbsim_load (struct target_ops *self, const char *args, int fromtty)
+void
+gdbsim_target::load (const char *args, int fromtty)
{
const char *prog;
struct sim_inferior_data *sim_data
/* This is called not only when we first attach, but also when the
user types "run" after having attached. */
-static void
-gdbsim_create_inferior (struct target_ops *target, const char *exec_file,
- const std::string &allargs, char **env, int from_tty)
+void
+gdbsim_target::create_inferior (const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty)
{
struct sim_inferior_data *sim_data
= get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED);
(exec_file ? exec_file : "(NULL)"),
args);
- if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid))
- gdbsim_kill (target);
+ 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
/* Called when selecting the simulator. E.g. (gdb) target sim name. */
static void
-gdbsim_open (const char *args, int from_tty)
+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.
/* Close out all files and local state before this target loses control. */
-static void
-gdbsim_close (struct target_ops *self)
+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");
/* Terminate the open connection to the remote debugger.
Use this when you want to detach and do something else with your gdb. */
-static void
-gdbsim_detach (struct target_ops *ops, int from_tty)
+void
+gdbsim_target::detach (inferior *inf, int from_tty)
{
if (remote_debug)
fprintf_unfiltered (gdb_stdlog, "gdbsim_detach\n");
- unpush_target (ops); /* calls gdbsim_close to do the real work */
+ unpush_target (this); /* calls gdbsim_close to do the real work */
if (from_tty)
printf_filtered ("Ending simulator %s debugging\n", target_shortname);
}
return 0;
}
-static void
-gdbsim_resume (struct target_ops *ops,
- ptid_t ptid, int step, enum gdb_signal siggnal)
+void
+gdbsim_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal)
{
struct resume_data rd;
struct sim_inferior_data *sim_data
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."));
return 0;
}
-static void
-gdbsim_interrupt (struct target_ops *self, ptid_t ptid)
+void
+gdbsim_target::interrupt ()
{
- struct sim_inferior_data *sim_data;
-
- if (ptid_equal (ptid, minus_one_ptid))
- {
- iterate_over_inferiors (gdbsim_interrupt_inferior, NULL);
- }
- else
- {
- struct inferior *inf = find_inferior_ptid (ptid);
-
- if (inf == NULL)
- error (_("Can't stop pid %d. No inferior found."),
- ptid_get_pid (ptid));
-
- gdbsim_interrupt_inferior (inf, NULL);
- }
+ iterate_over_inferiors (gdbsim_interrupt_inferior, NULL);
}
/* GDB version of os_poll_quit callback.
static void
gdbsim_cntrl_c (int signo)
{
- gdbsim_interrupt (NULL, minus_one_ptid);
+ gdbsim_ops.interrupt ();
}
-static ptid_t
-gdbsim_wait (struct target_ops *ops,
- ptid_t ptid, struct target_waitstatus *status, int options)
+ptid_t
+gdbsim_target::wait (ptid_t ptid, struct target_waitstatus *status, int options)
{
struct sim_inferior_data *sim_data;
static sighandler_t prev_sigint;
/* 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;
}
that registers contains all the registers from the program being
debugged. */
-static void
-gdbsim_prepare_to_store (struct target_ops *self, struct regcache *regcache)
+void
+gdbsim_target::prepare_to_store (struct regcache *regcache)
{
/* Do nothing, since we can store individual regs. */
}
/* If this target doesn't have memory yet, return 0 causing the
request to be passed to a lower target, hopefully an exec
file. */
- if (!target->to_has_memory (target))
+ if (!target->has_memory ())
return TARGET_XFER_EOF;
if (!sim_data->program_loaded)
/* Target to_xfer_partial implementation. */
-static enum target_xfer_status
-gdbsim_xfer_partial (struct target_ops *ops, enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
- ULONGEST *xfered_len)
+enum target_xfer_status
+gdbsim_target::xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
{
switch (object)
{
case TARGET_OBJECT_MEMORY:
- return gdbsim_xfer_memory (ops, readbuf, writebuf, offset, len,
+ return gdbsim_xfer_memory (this, readbuf, writebuf, offset, len,
xfered_len);
default:
}
}
-static void
-gdbsim_files_info (struct target_ops *target)
+void
+gdbsim_target::files_info ()
{
struct sim_inferior_data *sim_data
= get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED);
/* Clear the simulator's notion of what the break points are. */
-static void
-gdbsim_mourn_inferior (struct target_ops *target)
+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. */
-static int
-gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid)
+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. */
-static const char *
-gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid)
+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. */
-static int
-gdbsim_has_all_memory (struct target_ops *ops)
+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;
}
-static int
-gdbsim_has_memory (struct target_ops *ops)
+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;
-}
-
-/* Define the target subroutine names. */
-
-struct target_ops gdbsim_ops;
-
-static void
-init_gdbsim_ops (void)
-{
- gdbsim_ops.to_shortname = "sim";
- gdbsim_ops.to_longname = "simulator";
- gdbsim_ops.to_doc = "Use the compiled-in simulator.";
- gdbsim_ops.to_open = gdbsim_open;
- gdbsim_ops.to_close = gdbsim_close;
- gdbsim_ops.to_detach = gdbsim_detach;
- gdbsim_ops.to_resume = gdbsim_resume;
- gdbsim_ops.to_wait = gdbsim_wait;
- gdbsim_ops.to_fetch_registers = gdbsim_fetch_register;
- gdbsim_ops.to_store_registers = gdbsim_store_register;
- gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store;
- gdbsim_ops.to_xfer_partial = gdbsim_xfer_partial;
- gdbsim_ops.to_files_info = gdbsim_files_info;
- gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint;
- gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint;
- gdbsim_ops.to_kill = gdbsim_kill;
- gdbsim_ops.to_load = gdbsim_load;
- gdbsim_ops.to_create_inferior = gdbsim_create_inferior;
- gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior;
- gdbsim_ops.to_interrupt = gdbsim_interrupt;
- gdbsim_ops.to_thread_alive = gdbsim_thread_alive;
- gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str;
- gdbsim_ops.to_stratum = process_stratum;
- gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory;
- gdbsim_ops.to_has_memory = gdbsim_has_memory;
- gdbsim_ops.to_has_stack = default_child_has_stack;
- gdbsim_ops.to_has_registers = default_child_has_registers;
- gdbsim_ops.to_has_execution = default_child_has_execution;
- gdbsim_ops.to_magic = OPS_MAGIC;
+ return true;
}
void
{
struct cmd_list_element *c;
- init_gdbsim_ops ();
- 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);
}
projects / deliverable / binutils-gdb.git / blobdiff