/* Generic static probe support for GDB.
- Copyright (C) 2012-2015 Free Software Foundation, Inc.
+ Copyright (C) 2012-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdb_regex.h"
#include "frame.h"
#include "arch-utils.h"
+#include "value.h"
+#include "ax.h"
+#include "ax-gdb.h"
+#include "location.h"
#include <ctype.h>
typedef struct bound_probe bound_probe_s;
\f
+/* A helper for parse_probes that decodes a probe specification in
+ SEARCH_PSPACE. It appends matching SALs to RESULT. */
+
+static void
+parse_probes_in_pspace (const struct probe_ops *probe_ops,
+ struct program_space *search_pspace,
+ const char *objfile_namestr,
+ const char *provider,
+ const char *name,
+ struct symtabs_and_lines *result)
+{
+ struct objfile *objfile;
+
+ ALL_PSPACE_OBJFILES (search_pspace, objfile)
+ {
+ VEC (probe_p) *probes;
+ struct probe *probe;
+ int ix;
+
+ if (!objfile->sf || !objfile->sf->sym_probe_fns)
+ continue;
+
+ if (objfile_namestr
+ && FILENAME_CMP (objfile_name (objfile), objfile_namestr) != 0
+ && FILENAME_CMP (lbasename (objfile_name (objfile)),
+ objfile_namestr) != 0)
+ continue;
+
+ probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
+
+ for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
+ {
+ struct symtab_and_line *sal;
+
+ if (probe_ops != &probe_ops_any && probe->pops != probe_ops)
+ continue;
+
+ if (provider && strcmp (probe->provider, provider) != 0)
+ continue;
+
+ if (strcmp (probe->name, name) != 0)
+ continue;
+
+ ++result->nelts;
+ result->sals = XRESIZEVEC (struct symtab_and_line, result->sals,
+ result->nelts);
+ sal = &result->sals[result->nelts - 1];
+
+ init_sal (sal);
+
+ sal->pc = get_probe_address (probe, objfile);
+ sal->explicit_pc = 1;
+ sal->section = find_pc_overlay (sal->pc);
+ sal->pspace = search_pspace;
+ sal->probe = probe;
+ sal->objfile = objfile;
+ }
+ }
+}
+
/* See definition in probe.h. */
struct symtabs_and_lines
-parse_probes (char **argptr, struct linespec_result *canonical)
+parse_probes (const struct event_location *location,
+ struct program_space *search_pspace,
+ struct linespec_result *canonical)
{
- char *arg_start, *arg_end, *arg;
+ char *arg_end, *arg;
char *objfile_namestr = NULL, *provider = NULL, *name, *p;
struct cleanup *cleanup;
struct symtabs_and_lines result;
- struct objfile *objfile;
- struct program_space *pspace;
const struct probe_ops *probe_ops;
- const char *cs;
+ const char *arg_start, *cs;
result.sals = NULL;
result.nelts = 0;
- arg_start = *argptr;
+ gdb_assert (event_location_type (location) == PROBE_LOCATION);
+ arg_start = get_probe_location (location);
- cs = *argptr;
+ cs = arg_start;
probe_ops = probe_linespec_to_ops (&cs);
if (probe_ops == NULL)
error (_("'%s' is not a probe linespec"), arg_start);
if (objfile_namestr && *objfile_namestr == '\0')
error (_("invalid objfile name"));
- ALL_PSPACES (pspace)
- ALL_PSPACE_OBJFILES (pspace, objfile)
- {
- VEC (probe_p) *probes;
- struct probe *probe;
- int ix;
-
- if (!objfile->sf || !objfile->sf->sym_probe_fns)
- continue;
-
- if (objfile_namestr
- && FILENAME_CMP (objfile_name (objfile), objfile_namestr) != 0
- && FILENAME_CMP (lbasename (objfile_name (objfile)),
- objfile_namestr) != 0)
- continue;
-
- probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
-
- for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
- {
- struct symtab_and_line *sal;
-
- if (probe_ops != &probe_ops_any && probe->pops != probe_ops)
- continue;
-
- if (provider && strcmp (probe->provider, provider) != 0)
- continue;
-
- if (strcmp (probe->name, name) != 0)
- continue;
-
- ++result.nelts;
- result.sals = xrealloc (result.sals,
- result.nelts
- * sizeof (struct symtab_and_line));
- sal = &result.sals[result.nelts - 1];
-
- init_sal (sal);
+ if (search_pspace != NULL)
+ {
+ parse_probes_in_pspace (probe_ops, search_pspace, objfile_namestr,
+ provider, name, &result);
+ }
+ else
+ {
+ struct program_space *pspace;
- sal->pc = get_probe_address (probe, objfile);
- sal->explicit_pc = 1;
- sal->section = find_pc_overlay (sal->pc);
- sal->pspace = pspace;
- sal->probe = probe;
- sal->objfile = objfile;
- }
- }
+ ALL_PSPACES (pspace)
+ parse_probes_in_pspace (probe_ops, pspace, objfile_namestr,
+ provider, name, &result);
+ }
if (result.nelts == 0)
{
if (canonical)
{
+ char *canon;
+
+ canon = savestring (arg_start, arg_end - arg_start);
+ make_cleanup (xfree, canon);
canonical->special_display = 1;
canonical->pre_expanded = 1;
- canonical->addr_string = savestring (*argptr, arg_end - *argptr);
+ canonical->location = new_probe_location (canon);
}
- *argptr = arg_end;
do_cleanups (cleanup);
return result;
return 0;
}
+/* Helper function that parses a probe linespec of the form [PROVIDER
+ [PROBE [OBJNAME]]] from the provided string STR. */
+
+static void
+parse_probe_linespec (const char *str, char **provider,
+ char **probe_name, char **objname)
+{
+ *probe_name = *objname = NULL;
+
+ *provider = extract_arg_const (&str);
+ if (*provider != NULL)
+ {
+ *probe_name = extract_arg_const (&str);
+ if (*probe_name != NULL)
+ *objname = extract_arg_const (&str);
+ }
+}
+
/* See comment in probe.h. */
void
struct bound_probe *probe;
struct gdbarch *gdbarch = get_current_arch ();
- /* Do we have a `provider:probe:objfile' style of linespec? */
- provider = extract_arg_const (&arg);
- if (provider)
- {
- make_cleanup (xfree, provider);
-
- probe_name = extract_arg_const (&arg);
- if (probe_name)
- {
- make_cleanup (xfree, probe_name);
-
- objname = extract_arg_const (&arg);
- if (objname)
- make_cleanup (xfree, objname);
- }
- }
+ parse_probe_linespec (arg, &provider, &probe_name, &objname);
+ make_cleanup (xfree, provider);
+ make_cleanup (xfree, probe_name);
+ make_cleanup (xfree, objname);
probes = collect_probes (objname, provider, probe_name, pops);
make_cleanup (VEC_cleanup (probe_p), &probes);
info_probes_for_ops (arg, from_tty, NULL);
}
+/* Implementation of the `enable probes' command. */
+
+static void
+enable_probes_command (char *arg, int from_tty)
+{
+ char *provider, *probe_name = NULL, *objname = NULL;
+ struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
+ VEC (bound_probe_s) *probes;
+ struct bound_probe *probe;
+ int i;
+
+ parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname);
+ make_cleanup (xfree, provider);
+ make_cleanup (xfree, probe_name);
+ make_cleanup (xfree, objname);
+
+ probes = collect_probes (objname, provider, probe_name, NULL);
+ if (VEC_empty (bound_probe_s, probes))
+ {
+ ui_out_message (current_uiout, 0, _("No probes matched.\n"));
+ do_cleanups (cleanup);
+ return;
+ }
+
+ /* Enable the selected probes, provided their backends support the
+ notion of enabling a probe. */
+ for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i)
+ {
+ const struct probe_ops *pops = probe->probe->pops;
+
+ if (pops->enable_probe != NULL)
+ {
+ pops->enable_probe (probe->probe);
+ ui_out_message (current_uiout, 0,
+ _("Probe %s:%s enabled.\n"),
+ probe->probe->provider, probe->probe->name);
+ }
+ else
+ ui_out_message (current_uiout, 0,
+ _("Probe %s:%s cannot be enabled.\n"),
+ probe->probe->provider, probe->probe->name);
+ }
+
+ do_cleanups (cleanup);
+}
+
+/* Implementation of the `disable probes' command. */
+
+static void
+disable_probes_command (char *arg, int from_tty)
+{
+ char *provider, *probe_name = NULL, *objname = NULL;
+ struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
+ VEC (bound_probe_s) *probes;
+ struct bound_probe *probe;
+ int i;
+
+ parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname);
+ make_cleanup (xfree, provider);
+ make_cleanup (xfree, probe_name);
+ make_cleanup (xfree, objname);
+
+ probes = collect_probes (objname, provider, probe_name, NULL /* pops */);
+ if (VEC_empty (bound_probe_s, probes))
+ {
+ ui_out_message (current_uiout, 0, _("No probes matched.\n"));
+ do_cleanups (cleanup);
+ return;
+ }
+
+ /* Disable the selected probes, provided their backends support the
+ notion of enabling a probe. */
+ for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i)
+ {
+ const struct probe_ops *pops = probe->probe->pops;
+
+ if (pops->disable_probe != NULL)
+ {
+ pops->disable_probe (probe->probe);
+ ui_out_message (current_uiout, 0,
+ _("Probe %s:%s disabled.\n"),
+ probe->probe->provider, probe->probe->name);
+ }
+ else
+ ui_out_message (current_uiout, 0,
+ _("Probe %s:%s cannot be disabled.\n"),
+ probe->probe->provider, probe->probe->name);
+ }
+
+ do_cleanups (cleanup);
+}
+
/* See comments in probe.h. */
CORE_ADDR
return &info_probes_cmdlist;
}
+\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 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 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);
+}
+
+static const struct internalvar_funcs probe_funcs =
+{
+ compute_probe_arg,
+ compile_probe_arg,
+ NULL
+};
+
+
VEC (probe_ops_cp) *all_probe_ops;
void _initialize_probe (void);
{
VEC_safe_push (probe_ops_cp, all_probe_ops, &probe_ops_any);
+ 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 ("all", class_info, info_probes_command,
_("\
Show information about all type of probes."),
info_probes_cmdlist_get ());
+
+ add_cmd ("probes", class_breakpoint, enable_probes_command, _("\
+Enable probes.\n\
+Usage: enable probes [PROVIDER [NAME [OBJECT]]]\n\
+Each argument is a regular expression, used to select probes.\n\
+PROVIDER matches probe provider names.\n\
+NAME matches the probe names.\n\
+OBJECT matches the executable or shared library name.\n\
+If you do not specify any argument then the command will enable\n\
+all defined probes."),
+ &enablelist);
+
+ add_cmd ("probes", class_breakpoint, disable_probes_command, _("\
+Disable probes.\n\
+Usage: disable probes [PROVIDER [NAME [OBJECT]]]\n\
+Each argument is a regular expression, used to select probes.\n\
+PROVIDER matches probe provider names.\n\
+NAME matches the probe names.\n\
+OBJECT matches the executable or shared library name.\n\
+If you do not specify any argument then the command will disable\n\
+all defined probes."),
+ &disablelist);
+
}
projects / deliverable / binutils-gdb.git / blobdiff