03e98035a2
This patch moves the `compute_probe_arg' and `compile_probe_arg' functions from stap-probe.c to probe.c. The rationale is that it is reasonable to assume that all backends will provide the `$_probe_argN' convenience variables, and that the user must be placed on the PC of the probe when requesting that information. The value and type of the argument can still be determined by the probe backend via the `pops->evaluate_probe_argument' and `pops->compile_to_ax' handlers. Note that a test in gdb.base/stap-probe.exp had to be adjusted because the "No SystemTap probe at PC" messages are now "No probe at PC". gdb/ChangeLog: 2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com> * probe.c (compute_probe_arg): Moved from stap-probe.c (compile_probe_arg): Likewise. (probe_funcs): Likewise. * stap-probe.c (compute_probe_arg): Moved to probe.c. (compile_probe_arg): Likewise. (probe_funcs): Likewise. gdb/testsuite/ChangeLog: 2015-02-17 Jose E. Marchesi <jose.marchesi@oracle.com> * gdb.base/stap-probe.exp (stap_test): Remove "SystemTap" from expected message when trying to access $_probe_* convenience variables while not on a probe.
953 lines
25 KiB
C
953 lines
25 KiB
C
/* Generic static probe support for GDB.
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Copyright (C) 2012-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "probe.h"
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#include "command.h"
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#include "cli/cli-cmds.h"
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#include "cli/cli-utils.h"
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#include "objfiles.h"
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#include "symtab.h"
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#include "progspace.h"
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#include "filenames.h"
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#include "linespec.h"
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#include "gdb_regex.h"
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#include "frame.h"
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#include "arch-utils.h"
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#include "value.h"
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#include "ax.h"
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#include "ax-gdb.h"
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#include <ctype.h>
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typedef struct bound_probe bound_probe_s;
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DEF_VEC_O (bound_probe_s);
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/* See definition in probe.h. */
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struct symtabs_and_lines
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parse_probes (char **argptr, struct linespec_result *canonical)
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{
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char *arg_start, *arg_end, *arg;
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char *objfile_namestr = NULL, *provider = NULL, *name, *p;
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struct cleanup *cleanup;
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struct symtabs_and_lines result;
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struct objfile *objfile;
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struct program_space *pspace;
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const struct probe_ops *probe_ops;
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const char *cs;
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result.sals = NULL;
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result.nelts = 0;
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arg_start = *argptr;
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cs = *argptr;
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probe_ops = probe_linespec_to_ops (&cs);
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if (probe_ops == NULL)
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error (_("'%s' is not a probe linespec"), arg_start);
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arg = (char *) cs;
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arg = skip_spaces (arg);
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if (!*arg)
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error (_("argument to `%s' missing"), arg_start);
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arg_end = skip_to_space (arg);
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/* We make a copy here so we can write over parts with impunity. */
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arg = savestring (arg, arg_end - arg);
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cleanup = make_cleanup (xfree, arg);
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/* Extract each word from the argument, separated by ":"s. */
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p = strchr (arg, ':');
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if (p == NULL)
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{
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/* This is `-p name'. */
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name = arg;
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}
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else
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{
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char *hold = p + 1;
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*p = '\0';
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p = strchr (hold, ':');
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if (p == NULL)
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{
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/* This is `-p provider:name'. */
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provider = arg;
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name = hold;
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}
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else
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{
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/* This is `-p objfile:provider:name'. */
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*p = '\0';
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objfile_namestr = arg;
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provider = hold;
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name = p + 1;
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}
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}
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if (*name == '\0')
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error (_("no probe name specified"));
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if (provider && *provider == '\0')
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error (_("invalid provider name"));
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if (objfile_namestr && *objfile_namestr == '\0')
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error (_("invalid objfile name"));
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ALL_PSPACES (pspace)
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ALL_PSPACE_OBJFILES (pspace, objfile)
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{
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VEC (probe_p) *probes;
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struct probe *probe;
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int ix;
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if (!objfile->sf || !objfile->sf->sym_probe_fns)
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continue;
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if (objfile_namestr
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&& FILENAME_CMP (objfile_name (objfile), objfile_namestr) != 0
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&& FILENAME_CMP (lbasename (objfile_name (objfile)),
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objfile_namestr) != 0)
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continue;
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probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
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for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
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{
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struct symtab_and_line *sal;
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if (probe_ops != &probe_ops_any && probe->pops != probe_ops)
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continue;
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if (provider && strcmp (probe->provider, provider) != 0)
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continue;
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if (strcmp (probe->name, name) != 0)
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continue;
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++result.nelts;
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result.sals = xrealloc (result.sals,
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result.nelts
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* sizeof (struct symtab_and_line));
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sal = &result.sals[result.nelts - 1];
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init_sal (sal);
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sal->pc = get_probe_address (probe, objfile);
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sal->explicit_pc = 1;
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sal->section = find_pc_overlay (sal->pc);
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sal->pspace = pspace;
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sal->probe = probe;
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sal->objfile = objfile;
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}
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}
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if (result.nelts == 0)
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{
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throw_error (NOT_FOUND_ERROR,
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_("No probe matching objfile=`%s', provider=`%s', name=`%s'"),
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objfile_namestr ? objfile_namestr : _("<any>"),
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provider ? provider : _("<any>"),
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name);
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}
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if (canonical)
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{
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canonical->special_display = 1;
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canonical->pre_expanded = 1;
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canonical->addr_string = savestring (*argptr, arg_end - *argptr);
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}
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*argptr = arg_end;
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do_cleanups (cleanup);
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return result;
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}
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/* See definition in probe.h. */
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VEC (probe_p) *
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find_probes_in_objfile (struct objfile *objfile, const char *provider,
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const char *name)
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{
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VEC (probe_p) *probes, *result = NULL;
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int ix;
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struct probe *probe;
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if (!objfile->sf || !objfile->sf->sym_probe_fns)
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return NULL;
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probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
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for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
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{
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if (strcmp (probe->provider, provider) != 0)
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continue;
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if (strcmp (probe->name, name) != 0)
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continue;
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VEC_safe_push (probe_p, result, probe);
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}
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return result;
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}
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/* See definition in probe.h. */
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struct bound_probe
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find_probe_by_pc (CORE_ADDR pc)
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{
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struct objfile *objfile;
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struct bound_probe result;
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result.objfile = NULL;
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result.probe = NULL;
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ALL_OBJFILES (objfile)
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{
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VEC (probe_p) *probes;
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int ix;
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struct probe *probe;
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if (!objfile->sf || !objfile->sf->sym_probe_fns
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|| objfile->sect_index_text == -1)
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continue;
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/* If this proves too inefficient, we can replace with a hash. */
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probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
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for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
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if (get_probe_address (probe, objfile) == pc)
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{
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result.objfile = objfile;
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result.probe = probe;
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return result;
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}
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}
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return result;
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}
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/* Make a vector of probes matching OBJNAME, PROVIDER, and PROBE_NAME.
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If POPS is not NULL, only probes of this certain probe_ops will match.
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Each argument is a regexp, or NULL, which matches anything. */
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static VEC (bound_probe_s) *
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collect_probes (char *objname, char *provider, char *probe_name,
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const struct probe_ops *pops)
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{
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struct objfile *objfile;
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VEC (bound_probe_s) *result = NULL;
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struct cleanup *cleanup, *cleanup_temps;
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regex_t obj_pat, prov_pat, probe_pat;
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cleanup = make_cleanup (VEC_cleanup (bound_probe_s), &result);
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cleanup_temps = make_cleanup (null_cleanup, NULL);
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if (provider != NULL)
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compile_rx_or_error (&prov_pat, provider, _("Invalid provider regexp"));
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if (probe_name != NULL)
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compile_rx_or_error (&probe_pat, probe_name, _("Invalid probe regexp"));
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if (objname != NULL)
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compile_rx_or_error (&obj_pat, objname, _("Invalid object file regexp"));
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ALL_OBJFILES (objfile)
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{
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VEC (probe_p) *probes;
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struct probe *probe;
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int ix;
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if (! objfile->sf || ! objfile->sf->sym_probe_fns)
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continue;
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if (objname)
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{
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if (regexec (&obj_pat, objfile_name (objfile), 0, NULL, 0) != 0)
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continue;
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}
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probes = objfile->sf->sym_probe_fns->sym_get_probes (objfile);
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for (ix = 0; VEC_iterate (probe_p, probes, ix, probe); ix++)
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{
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struct bound_probe bound;
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if (pops != NULL && probe->pops != pops)
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continue;
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if (provider
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&& regexec (&prov_pat, probe->provider, 0, NULL, 0) != 0)
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continue;
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if (probe_name
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&& regexec (&probe_pat, probe->name, 0, NULL, 0) != 0)
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continue;
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bound.objfile = objfile;
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bound.probe = probe;
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VEC_safe_push (bound_probe_s, result, &bound);
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}
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}
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do_cleanups (cleanup_temps);
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discard_cleanups (cleanup);
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return result;
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}
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/* A qsort comparison function for bound_probe_s objects. */
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static int
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compare_probes (const void *a, const void *b)
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{
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const struct bound_probe *pa = (const struct bound_probe *) a;
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const struct bound_probe *pb = (const struct bound_probe *) b;
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int v;
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v = strcmp (pa->probe->provider, pb->probe->provider);
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if (v)
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return v;
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v = strcmp (pa->probe->name, pb->probe->name);
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if (v)
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return v;
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if (pa->probe->address < pb->probe->address)
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return -1;
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if (pa->probe->address > pb->probe->address)
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return 1;
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return strcmp (objfile_name (pa->objfile), objfile_name (pb->objfile));
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}
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/* Helper function that generate entries in the ui_out table being
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crafted by `info_probes_for_ops'. */
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static void
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gen_ui_out_table_header_info (VEC (bound_probe_s) *probes,
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const struct probe_ops *p)
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{
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/* `headings' refers to the names of the columns when printing `info
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probes'. */
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VEC (info_probe_column_s) *headings = NULL;
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struct cleanup *c;
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info_probe_column_s *column;
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size_t headings_size;
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int ix;
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gdb_assert (p != NULL);
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if (p->gen_info_probes_table_header == NULL
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&& p->gen_info_probes_table_values == NULL)
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return;
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gdb_assert (p->gen_info_probes_table_header != NULL
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&& p->gen_info_probes_table_values != NULL);
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c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings);
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p->gen_info_probes_table_header (&headings);
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headings_size = VEC_length (info_probe_column_s, headings);
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for (ix = 0;
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VEC_iterate (info_probe_column_s, headings, ix, column);
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++ix)
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{
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struct bound_probe *probe;
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int jx;
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size_t size_max = strlen (column->print_name);
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for (jx = 0; VEC_iterate (bound_probe_s, probes, jx, probe); ++jx)
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{
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/* `probe_fields' refers to the values of each new field that this
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probe will display. */
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VEC (const_char_ptr) *probe_fields = NULL;
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struct cleanup *c2;
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const char *val;
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int kx;
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if (probe->probe->pops != p)
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continue;
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c2 = make_cleanup (VEC_cleanup (const_char_ptr), &probe_fields);
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p->gen_info_probes_table_values (probe->probe, &probe_fields);
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gdb_assert (VEC_length (const_char_ptr, probe_fields)
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== headings_size);
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for (kx = 0; VEC_iterate (const_char_ptr, probe_fields, kx, val);
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++kx)
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{
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/* It is valid to have a NULL value here, which means that the
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backend does not have something to write and this particular
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field should be skipped. */
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if (val == NULL)
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continue;
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size_max = max (strlen (val), size_max);
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}
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do_cleanups (c2);
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}
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ui_out_table_header (current_uiout, size_max, ui_left,
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column->field_name, column->print_name);
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}
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do_cleanups (c);
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}
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/* Helper function to print not-applicable strings for all the extra
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columns defined in a probe_ops. */
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static void
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print_ui_out_not_applicables (const struct probe_ops *pops)
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{
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struct cleanup *c;
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VEC (info_probe_column_s) *headings = NULL;
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info_probe_column_s *column;
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int ix;
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if (pops->gen_info_probes_table_header == NULL)
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return;
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c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings);
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pops->gen_info_probes_table_header (&headings);
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for (ix = 0;
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VEC_iterate (info_probe_column_s, headings, ix, column);
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++ix)
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ui_out_field_string (current_uiout, column->field_name, _("n/a"));
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do_cleanups (c);
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}
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/* Helper function to print extra information about a probe and an objfile
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represented by PROBE. */
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static void
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print_ui_out_info (struct probe *probe)
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{
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int ix;
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int j = 0;
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/* `values' refers to the actual values of each new field in the output
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of `info probe'. `headings' refers to the names of each new field. */
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VEC (const_char_ptr) *values = NULL;
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VEC (info_probe_column_s) *headings = NULL;
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info_probe_column_s *column;
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struct cleanup *c;
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gdb_assert (probe != NULL);
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gdb_assert (probe->pops != NULL);
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if (probe->pops->gen_info_probes_table_header == NULL
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&& probe->pops->gen_info_probes_table_values == NULL)
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return;
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gdb_assert (probe->pops->gen_info_probes_table_header != NULL
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&& probe->pops->gen_info_probes_table_values != NULL);
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c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings);
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make_cleanup (VEC_cleanup (const_char_ptr), &values);
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probe->pops->gen_info_probes_table_header (&headings);
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probe->pops->gen_info_probes_table_values (probe, &values);
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gdb_assert (VEC_length (info_probe_column_s, headings)
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== VEC_length (const_char_ptr, values));
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for (ix = 0;
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VEC_iterate (info_probe_column_s, headings, ix, column);
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++ix)
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{
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const char *val = VEC_index (const_char_ptr, values, j++);
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if (val == NULL)
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ui_out_field_skip (current_uiout, column->field_name);
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else
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ui_out_field_string (current_uiout, column->field_name, val);
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}
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do_cleanups (c);
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}
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/* Helper function that returns the number of extra fields which POPS will
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need. */
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static int
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get_number_extra_fields (const struct probe_ops *pops)
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{
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VEC (info_probe_column_s) *headings = NULL;
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struct cleanup *c;
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int n;
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if (pops->gen_info_probes_table_header == NULL)
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return 0;
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c = make_cleanup (VEC_cleanup (info_probe_column_s), &headings);
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pops->gen_info_probes_table_header (&headings);
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n = VEC_length (info_probe_column_s, headings);
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do_cleanups (c);
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return n;
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}
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/* Helper function that returns 1 if there is a probe in PROBES
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featuring the given POPS. It returns 0 otherwise. */
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static int
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exists_probe_with_pops (VEC (bound_probe_s) *probes,
|
||
const struct probe_ops *pops)
|
||
{
|
||
struct bound_probe *probe;
|
||
int ix;
|
||
|
||
for (ix = 0; VEC_iterate (bound_probe_s, probes, ix, probe); ++ix)
|
||
if (probe->probe->pops == pops)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* See comment in probe.h. */
|
||
|
||
void
|
||
info_probes_for_ops (const char *arg, int from_tty,
|
||
const struct probe_ops *pops)
|
||
{
|
||
char *provider, *probe_name = NULL, *objname = NULL;
|
||
struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
|
||
VEC (bound_probe_s) *probes;
|
||
int i, any_found;
|
||
int ui_out_extra_fields = 0;
|
||
size_t size_addr;
|
||
size_t size_name = strlen ("Name");
|
||
size_t size_objname = strlen ("Object");
|
||
size_t size_provider = strlen ("Provider");
|
||
size_t size_type = strlen ("Type");
|
||
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);
|
||
}
|
||
}
|
||
|
||
probes = collect_probes (objname, provider, probe_name, pops);
|
||
make_cleanup (VEC_cleanup (probe_p), &probes);
|
||
|
||
if (pops == NULL)
|
||
{
|
||
const struct probe_ops *po;
|
||
int ix;
|
||
|
||
/* If the probe_ops is NULL, it means the user has requested a "simple"
|
||
`info probes', i.e., she wants to print all information about all
|
||
probes. For that, we have to identify how many extra fields we will
|
||
need to add in the ui_out table.
|
||
|
||
To do that, we iterate over all probe_ops, querying each one about
|
||
its extra fields, and incrementing `ui_out_extra_fields' to reflect
|
||
that number. But note that we ignore the probe_ops for which no probes
|
||
are defined with the given search criteria. */
|
||
|
||
for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, po); ++ix)
|
||
if (exists_probe_with_pops (probes, po))
|
||
ui_out_extra_fields += get_number_extra_fields (po);
|
||
}
|
||
else
|
||
ui_out_extra_fields = get_number_extra_fields (pops);
|
||
|
||
make_cleanup_ui_out_table_begin_end (current_uiout,
|
||
5 + ui_out_extra_fields,
|
||
VEC_length (bound_probe_s, probes),
|
||
"StaticProbes");
|
||
|
||
if (!VEC_empty (bound_probe_s, probes))
|
||
qsort (VEC_address (bound_probe_s, probes),
|
||
VEC_length (bound_probe_s, probes),
|
||
sizeof (bound_probe_s), compare_probes);
|
||
|
||
/* What's the size of an address in our architecture? */
|
||
size_addr = gdbarch_addr_bit (gdbarch) == 64 ? 18 : 10;
|
||
|
||
/* Determining the maximum size of each field (`type', `provider',
|
||
`name' and `objname'). */
|
||
for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i)
|
||
{
|
||
const char *probe_type = probe->probe->pops->type_name (probe->probe);
|
||
|
||
size_type = max (strlen (probe_type), size_type);
|
||
size_name = max (strlen (probe->probe->name), size_name);
|
||
size_provider = max (strlen (probe->probe->provider), size_provider);
|
||
size_objname = max (strlen (objfile_name (probe->objfile)), size_objname);
|
||
}
|
||
|
||
ui_out_table_header (current_uiout, size_type, ui_left, "type", _("Type"));
|
||
ui_out_table_header (current_uiout, size_provider, ui_left, "provider",
|
||
_("Provider"));
|
||
ui_out_table_header (current_uiout, size_name, ui_left, "name", _("Name"));
|
||
ui_out_table_header (current_uiout, size_addr, ui_left, "addr", _("Where"));
|
||
|
||
if (pops == NULL)
|
||
{
|
||
const struct probe_ops *po;
|
||
int ix;
|
||
|
||
/* We have to generate the table header for each new probe type
|
||
that we will print. Note that this excludes probe types not
|
||
having any defined probe with the search criteria. */
|
||
for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, po); ++ix)
|
||
if (exists_probe_with_pops (probes, po))
|
||
gen_ui_out_table_header_info (probes, po);
|
||
}
|
||
else
|
||
gen_ui_out_table_header_info (probes, pops);
|
||
|
||
ui_out_table_header (current_uiout, size_objname, ui_left, "object",
|
||
_("Object"));
|
||
ui_out_table_body (current_uiout);
|
||
|
||
for (i = 0; VEC_iterate (bound_probe_s, probes, i, probe); ++i)
|
||
{
|
||
struct cleanup *inner;
|
||
const char *probe_type = probe->probe->pops->type_name (probe->probe);
|
||
|
||
inner = make_cleanup_ui_out_tuple_begin_end (current_uiout, "probe");
|
||
|
||
ui_out_field_string (current_uiout, "type",probe_type);
|
||
ui_out_field_string (current_uiout, "provider", probe->probe->provider);
|
||
ui_out_field_string (current_uiout, "name", probe->probe->name);
|
||
ui_out_field_core_addr (current_uiout, "addr",
|
||
probe->probe->arch,
|
||
get_probe_address (probe->probe, probe->objfile));
|
||
|
||
if (pops == NULL)
|
||
{
|
||
const struct probe_ops *po;
|
||
int ix;
|
||
|
||
for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, po);
|
||
++ix)
|
||
if (probe->probe->pops == po)
|
||
print_ui_out_info (probe->probe);
|
||
else if (exists_probe_with_pops (probes, po))
|
||
print_ui_out_not_applicables (po);
|
||
}
|
||
else
|
||
print_ui_out_info (probe->probe);
|
||
|
||
ui_out_field_string (current_uiout, "object",
|
||
objfile_name (probe->objfile));
|
||
ui_out_text (current_uiout, "\n");
|
||
|
||
do_cleanups (inner);
|
||
}
|
||
|
||
any_found = !VEC_empty (bound_probe_s, probes);
|
||
do_cleanups (cleanup);
|
||
|
||
if (!any_found)
|
||
ui_out_message (current_uiout, 0, _("No probes matched.\n"));
|
||
}
|
||
|
||
/* Implementation of the `info probes' command. */
|
||
|
||
static void
|
||
info_probes_command (char *arg, int from_tty)
|
||
{
|
||
info_probes_for_ops (arg, from_tty, NULL);
|
||
}
|
||
|
||
/* See comments in probe.h. */
|
||
|
||
CORE_ADDR
|
||
get_probe_address (struct probe *probe, struct objfile *objfile)
|
||
{
|
||
return probe->pops->get_probe_address (probe, objfile);
|
||
}
|
||
|
||
/* See comments in probe.h. */
|
||
|
||
unsigned
|
||
get_probe_argument_count (struct probe *probe, struct frame_info *frame)
|
||
{
|
||
return probe->pops->get_probe_argument_count (probe, frame);
|
||
}
|
||
|
||
/* See comments in probe.h. */
|
||
|
||
int
|
||
can_evaluate_probe_arguments (struct probe *probe)
|
||
{
|
||
return probe->pops->can_evaluate_probe_arguments (probe);
|
||
}
|
||
|
||
/* See comments in probe.h. */
|
||
|
||
struct value *
|
||
evaluate_probe_argument (struct probe *probe, unsigned n,
|
||
struct frame_info *frame)
|
||
{
|
||
return probe->pops->evaluate_probe_argument (probe, n, frame);
|
||
}
|
||
|
||
/* See comments in probe.h. */
|
||
|
||
struct value *
|
||
probe_safe_evaluate_at_pc (struct frame_info *frame, unsigned n)
|
||
{
|
||
struct bound_probe probe;
|
||
unsigned n_args;
|
||
|
||
probe = find_probe_by_pc (get_frame_pc (frame));
|
||
if (!probe.probe)
|
||
return NULL;
|
||
|
||
n_args = get_probe_argument_count (probe.probe, frame);
|
||
if (n >= n_args)
|
||
return NULL;
|
||
|
||
return evaluate_probe_argument (probe.probe, n, frame);
|
||
}
|
||
|
||
/* See comment in probe.h. */
|
||
|
||
const struct probe_ops *
|
||
probe_linespec_to_ops (const char **linespecp)
|
||
{
|
||
int ix;
|
||
const struct probe_ops *probe_ops;
|
||
|
||
for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, probe_ops); ix++)
|
||
if (probe_ops->is_linespec (linespecp))
|
||
return probe_ops;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* See comment in probe.h. */
|
||
|
||
int
|
||
probe_is_linespec_by_keyword (const char **linespecp, const char *const *keywords)
|
||
{
|
||
const char *s = *linespecp;
|
||
const char *const *csp;
|
||
|
||
for (csp = keywords; *csp; csp++)
|
||
{
|
||
const char *keyword = *csp;
|
||
size_t len = strlen (keyword);
|
||
|
||
if (strncmp (s, keyword, len) == 0 && isspace (s[len]))
|
||
{
|
||
*linespecp += len + 1;
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Implementation of `is_linespec' method for `struct probe_ops'. */
|
||
|
||
static int
|
||
probe_any_is_linespec (const char **linespecp)
|
||
{
|
||
static const char *const keywords[] = { "-p", "-probe", NULL };
|
||
|
||
return probe_is_linespec_by_keyword (linespecp, keywords);
|
||
}
|
||
|
||
/* Dummy method used for `probe_ops_any'. */
|
||
|
||
static void
|
||
probe_any_get_probes (VEC (probe_p) **probesp, struct objfile *objfile)
|
||
{
|
||
/* No probes can be provided by this dummy backend. */
|
||
}
|
||
|
||
/* Operations associated with a generic probe. */
|
||
|
||
const struct probe_ops probe_ops_any =
|
||
{
|
||
probe_any_is_linespec,
|
||
probe_any_get_probes,
|
||
};
|
||
|
||
/* See comments in probe.h. */
|
||
|
||
struct cmd_list_element **
|
||
info_probes_cmdlist_get (void)
|
||
{
|
||
static struct cmd_list_element *info_probes_cmdlist;
|
||
|
||
if (info_probes_cmdlist == NULL)
|
||
add_prefix_cmd ("probes", class_info, info_probes_command,
|
||
_("\
|
||
Show available static probes.\n\
|
||
Usage: info probes [all|TYPE [ARGS]]\n\
|
||
TYPE specifies the type of the probe, and can be one of the following:\n\
|
||
- stap\n\
|
||
If you specify TYPE, there may be additional arguments needed by the\n\
|
||
subcommand.\n\
|
||
If you do not specify any argument, or specify `all', then the command\n\
|
||
will show information about all types of probes."),
|
||
&info_probes_cmdlist, "info probes ",
|
||
0/*allow-unknown*/, &infolist);
|
||
|
||
return &info_probes_cmdlist;
|
||
}
|
||
|
||
|
||
|
||
/* 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);
|
||
|
||
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 ());
|
||
}
|