/* SystemTap probe support for GDB.
- Copyright (C) 2012-2014 Free Software Foundation, Inc.
+ Copyright (C) 2012-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbcmd.h"
#include "filenames.h"
#include "value.h"
-#include "exceptions.h"
#include "ax.h"
#include "ax-gdb.h"
#include "complaints.h"
/* Forward declaration. */
-static const struct probe_ops stap_probe_ops;
+extern const struct probe_ops stap_probe_ops;
/* Should we display debug information for the probe's argument expression
parsing? */
struct cleanup *back_to;
/* We need to initialize the expression buffer, in order to begin
- our parsing efforts. The language here does not matter, since we
- are using our own parser. */
- initialize_expout (&p.pstate, 10, current_language, gdbarch);
+ our parsing efforts. We use language_c here because we may need
+ to do pointer arithmetics. */
+ initialize_expout (&p.pstate, 10, language_def (language_c), gdbarch);
back_to = make_cleanup (free_current_contents, &p.pstate.expout);
p.saved_arg = *arg;
\f
-/* This is called to compute the value of one of the $_probe_arg*
- convenience variables. */
-
-static struct value *
-compute_probe_arg (struct gdbarch *arch, struct internalvar *ivar,
- void *data)
-{
- struct frame_info *frame = get_selected_frame (_("No frame selected"));
- CORE_ADDR pc = get_frame_pc (frame);
- int sel = (int) (uintptr_t) data;
- struct bound_probe pc_probe;
- const struct sym_probe_fns *pc_probe_fns;
- unsigned n_args;
-
- /* SEL == -1 means "_probe_argc". */
- gdb_assert (sel >= -1);
-
- pc_probe = find_probe_by_pc (pc);
- if (pc_probe.probe == NULL)
- error (_("No SystemTap probe at PC %s"), core_addr_to_string (pc));
-
- n_args = get_probe_argument_count (pc_probe.probe, frame);
- if (sel == -1)
- return value_from_longest (builtin_type (arch)->builtin_int, n_args);
-
- if (sel >= n_args)
- error (_("Invalid probe argument %d -- probe has %u arguments available"),
- sel, n_args);
-
- return evaluate_probe_argument (pc_probe.probe, sel, frame);
-}
-
-/* This is called to compile one of the $_probe_arg* convenience
- variables into an agent expression. */
-
-static void
-compile_probe_arg (struct internalvar *ivar, struct agent_expr *expr,
- struct axs_value *value, void *data)
-{
- CORE_ADDR pc = expr->scope;
- int sel = (int) (uintptr_t) data;
- struct bound_probe pc_probe;
- const struct sym_probe_fns *pc_probe_fns;
- int n_args;
- struct frame_info *frame = get_selected_frame (NULL);
-
- /* SEL == -1 means "_probe_argc". */
- gdb_assert (sel >= -1);
-
- pc_probe = find_probe_by_pc (pc);
- if (pc_probe.probe == NULL)
- error (_("No SystemTap probe at PC %s"), core_addr_to_string (pc));
-
- n_args = get_probe_argument_count (pc_probe.probe, frame);
-
- if (sel == -1)
- {
- value->kind = axs_rvalue;
- value->type = builtin_type (expr->gdbarch)->builtin_int;
- ax_const_l (expr, n_args);
- return;
- }
-
- gdb_assert (sel >= 0);
- if (sel >= n_args)
- error (_("Invalid probe argument %d -- probe has %d arguments available"),
- sel, n_args);
-
- pc_probe.probe->pops->compile_to_ax (pc_probe.probe, expr, value, sel);
-}
-
-\f
-
/* Set or clear a SystemTap semaphore. ADDRESS is the semaphore's
address. SET is zero if the semaphore should be cleared, or one
if it should be set. This is a helper function for `stap_semaphore_down'
stap_modify_semaphore (addr, 0, gdbarch);
}
-/* Implementation of `$_probe_arg*' set of variables. */
-
-static const struct internalvar_funcs probe_funcs =
-{
- compute_probe_arg,
- compile_probe_arg,
- NULL
-};
-
/* Helper function that parses the information contained in a
SystemTap's probe. Basically, the information consists in:
}
}
+/* Implementation of the type_name method. */
+
+static const char *
+stap_type_name (struct probe *probe)
+{
+ gdb_assert (probe->pops == &stap_probe_ops);
+ return "stap";
+}
+
static int
stap_probe_is_linespec (const char **linespecp)
{
/* SystemTap probe_ops. */
-static const struct probe_ops stap_probe_ops =
+const struct probe_ops stap_probe_ops =
{
stap_probe_is_linespec,
stap_get_probes,
stap_set_semaphore,
stap_clear_semaphore,
stap_probe_destroy,
+ stap_type_name,
stap_gen_info_probes_table_header,
stap_gen_info_probes_table_values,
+ NULL, /* enable_probe */
+ NULL /* disable_probe */
};
/* Implementation of the `info probes stap' command. */
show_stapexpressiondebug,
&setdebuglist, &showdebuglist);
- create_internalvar_type_lazy ("_probe_argc", &probe_funcs,
- (void *) (uintptr_t) -1);
- create_internalvar_type_lazy ("_probe_arg0", &probe_funcs,
- (void *) (uintptr_t) 0);
- create_internalvar_type_lazy ("_probe_arg1", &probe_funcs,
- (void *) (uintptr_t) 1);
- create_internalvar_type_lazy ("_probe_arg2", &probe_funcs,
- (void *) (uintptr_t) 2);
- create_internalvar_type_lazy ("_probe_arg3", &probe_funcs,
- (void *) (uintptr_t) 3);
- create_internalvar_type_lazy ("_probe_arg4", &probe_funcs,
- (void *) (uintptr_t) 4);
- create_internalvar_type_lazy ("_probe_arg5", &probe_funcs,
- (void *) (uintptr_t) 5);
- create_internalvar_type_lazy ("_probe_arg6", &probe_funcs,
- (void *) (uintptr_t) 6);
- create_internalvar_type_lazy ("_probe_arg7", &probe_funcs,
- (void *) (uintptr_t) 7);
- create_internalvar_type_lazy ("_probe_arg8", &probe_funcs,
- (void *) (uintptr_t) 8);
- create_internalvar_type_lazy ("_probe_arg9", &probe_funcs,
- (void *) (uintptr_t) 9);
- create_internalvar_type_lazy ("_probe_arg10", &probe_funcs,
- (void *) (uintptr_t) 10);
- create_internalvar_type_lazy ("_probe_arg11", &probe_funcs,
- (void *) (uintptr_t) 11);
-
add_cmd ("stap", class_info, info_probes_stap_command,
_("\
Show information about SystemTap static probes.\n\
projects / deliverable / binutils-gdb.git / blobdiff