"Implementing the catch syscall feature".
--- /dev/null
+/* This file is used to test the 'catch syscall' feature on GDB.
+
+ Please, if you are going to edit this file DO NOT change the syscalls
+ being called (nor the order of them). If you really must do this, then
+ take a look at catch-syscall.exp and modify there too.
+
+ Written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
+ September, 2008 */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+int
+main (void)
+{
+ /* A close() with a wrong argument. We are only
+ interested in the syscall. */
+ close (-1);
+
+ chroot (".");
+
+ /* The last syscall. Do not change this. */
+ _exit (0);
+}
--- /dev/null
+# Copyright 1997, 1999, 2007, 2008 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+# This program tests the 'catch syscall' functionality.
+#
+# It was written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
+# on September/2008.
+
+if { [is_remote target] || ![isnative] } then {
+ continue
+}
+
+set prms_id 0
+set bug_id 0
+
+global srcfile
+set testfile "catch-syscall"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+# All (but the last) syscalls from the example code
+# They are ordered according to the file, so do not change this.
+set all_syscalls { "close" "chroot" }
+set all_syscalls_numbers { }
+# The last syscall (exit()) does not return, so
+# we cannot expect the catchpoint to be triggered
+# twice. It is a special case.
+set last_syscall "exit_group"
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+ untested catch-syscall.exp
+ return -1
+}
+
+# Until "catch syscall" is implemented on other targets...
+if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
+ continue
+}
+
+# This shall be updated whenever 'catch syscall' is implemented
+# on some architecture.
+#if { ![istarget "i\[34567\]86-*-linux*"]
+if { ![istarget "x86_64-*-linux*"] && ![istarget "i\[34567\]86-*-linux*"]
+ && ![istarget "powerpc-*-linux*"] && ![istarget "powerpc64-*-linux*"] } {
+ continue
+}
+
+# Internal procedure used to check if, after issuing a 'catch syscall'
+# command (without arguments), the 'info breakpoints' command displays
+# that '"any syscall"' is to be caught.
+proc check_info_bp_any_syscall {} {
+ global gdb_prompt
+
+ # Verifying that the catchpoint appears in the 'info breakpoints'
+ # command, but with "<any syscall>".
+ set thistest "catch syscall appears in 'info breakpoints'"
+ gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall \"<any syscall>\".*" $thistest
+}
+
+# Internal procedure used to check if, after issuing a 'catch syscall X'
+# command (with arguments), the 'info breakpoints' command displays
+# that the syscall 'X' is to be caught.
+proc check_info_bp_specific_syscall { syscall } {
+ global gdb_prompt
+
+ set thistest "syscall(s) $syscall appears in 'info breakpoints'"
+ gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall(\[(\]s\[)\])? (.)?${syscall}(.)?.*" $thistest
+}
+
+# Internal procedure used to check if, after issuing a 'catch syscall X'
+# command (with many arguments), the 'info breakpoints' command displays
+# that the syscalls 'X' are to be caught.
+proc check_info_bp_many_syscalls { syscalls } {
+ global gdb_prompt
+ set filter_str ""
+
+ foreach name $syscalls {
+ set filter_str "${filter_str}${name}, "
+ }
+
+ set filter_str [ string trimright $filter_str ", " ]
+
+ set thistest "syscalls $filter_str appears in 'info breakpoints'"
+ gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscalls (.)?${filter_str}(.)?.*" $thistest
+}
+
+# This procedure checks if there was a call to a syscall.
+proc check_call_to_syscall { syscall } {
+ global gdb_prompt
+
+ set thistest "program has called $syscall"
+ gdb_test "continue" "Catchpoint .*(call to syscall .?${syscall}.?).*" $thistest
+}
+
+# This procedure checks if the syscall returned.
+proc check_return_from_syscall { syscall } {
+ global gdb_prompt
+
+ set thistest "syscall $syscall has returned"
+ gdb_test "continue" "Catchpoint .*(returned from syscall (.)?${syscall}(.)?).*" $thistest
+}
+
+# Internal procedure that performs two 'continue' commands and checks if
+# a syscall call AND return occur.
+proc check_continue { syscall } {
+ global gdb_prompt
+
+ # Testing if the 'continue' stops at the
+ # specified syscall_name. If it does, then it should
+ # first print that the infeior has called the syscall,
+ # and after print that the syscall has returned.
+
+ # Testing if the inferiorr has called the syscall.
+ check_call_to_syscall $syscall
+ # And now, that the syscall has returned.
+ check_return_from_syscall $syscall
+}
+
+# Inserts a syscall catchpoint with an argument.
+proc insert_catch_syscall_with_arg { syscall } {
+ global gdb_prompt
+
+ # Trying to set the catchpoint
+ set thistest "catch syscall with arguments ($syscall)"
+ gdb_test "catch syscall $syscall" "Catchpoint .*(syscall (.)?${syscall}(.)?( \[\[0-9\]+\])?).*" $thistest
+
+ check_info_bp_specific_syscall $syscall
+}
+
+# Inserts a syscall catchpoint with many arguments.
+proc insert_catch_syscall_with_many_args { syscalls numbers } {
+ global gdb_prompt
+ set catch [ join $syscalls " " ]
+ set filter_str ""
+
+ foreach name $syscalls number $numbers {
+ set filter_str "${filter_str}'${name}' \[${number}\] "
+ }
+
+ set filter_str [ string trimright $filter_str " " ]
+
+ # Trying to set the catchpoint
+ set thistest "catch syscall with arguments ($filter_str)"
+ gdb_test "catch syscall $catch" "Catchpoint .*(syscalls (.)?${filter_str}(.)?).*" $thistest
+
+ check_info_bp_many_syscalls $syscalls
+}
+
+proc check_for_program_end {} {
+ global gdb_prompt
+
+ # Deleting the catchpoints
+ delete_breakpoints
+
+ set thistest "successful program end"
+ gdb_test "continue" "Program exited normally.*" $thistest
+
+}
+
+proc test_catch_syscall_without_args {} {
+ global gdb_prompt all_syscalls last_syscall
+
+ # Trying to set the syscall
+ set thistest "setting catch syscall without arguments"
+ gdb_test "catch syscall" "Catchpoint .*(syscall).*" $thistest
+
+ check_info_bp_any_syscall
+
+ # We have to check every syscall
+ foreach name $all_syscalls {
+ check_continue $name
+ }
+
+ # At last but not least, we check if the inferior
+ # has called the last (exit) syscall.
+ check_call_to_syscall $last_syscall
+
+ # Now let's see if the inferior correctly finishes.
+ check_for_program_end
+}
+
+proc test_catch_syscall_with_args {} {
+ global gdb_prompt
+ set syscall_name "close"
+
+ insert_catch_syscall_with_arg $syscall_name
+
+ # Can we continue until we catch the syscall?
+ check_continue $syscall_name
+
+ # Now let's see if the inferior correctly finishes.
+ check_for_program_end
+}
+
+proc test_catch_syscall_with_many_args {} {
+ global gdb_prompt all_syscalls all_syscalls_numbers
+
+ insert_catch_syscall_with_many_args $all_syscalls $all_syscalls_numbers
+
+ # Can we continue until we catch the syscalls?
+ foreach name $all_syscalls {
+ check_continue $name
+ }
+
+ # Now let's see if the inferior correctly finishes.
+ check_for_program_end
+}
+
+proc test_catch_syscall_with_wrong_args {} {
+ global gdb_prompt
+ # mlock is not called from the source
+ set syscall_name "mlock"
+
+ insert_catch_syscall_with_arg $syscall_name
+
+ # Now, we must verify if the program stops with a continue.
+ # If it doesn't, everything is right (since we don't have
+ # a syscall named "mlock" in it). Otherwise, this is a failure.
+ set thistest "catch syscall with unused syscall ($syscall_name)"
+ gdb_test "continue" "Program exited normally.*" $thistest
+}
+
+proc test_catch_syscall_restarting_inferior {} {
+ global gdb_prompt
+ set syscall_name "chroot"
+
+ insert_catch_syscall_with_arg $syscall_name
+
+ # Let's first reach the call of the syscall.
+ check_call_to_syscall $syscall_name
+
+ # Now, restart the program
+ rerun_to_main
+
+ # And check for call/return
+ check_continue $syscall_name
+
+ # Can we finish?
+ check_for_program_end
+}
+
+proc do_syscall_tests {} {
+ global gdb_prompt srcdir
+
+ # First, we need to set GDB datadir.
+ send_gdb "set data-directory $srcdir/..\n"
+ gdb_expect 10 {
+ -re "$gdb_prompt $" {
+ verbose "Setting GDB datadir to $srcdir/..." 2
+ }
+ timeout {
+ error "Couldn't set GDB datadir."
+ }
+ }
+
+ # Verify that the 'catch syscall' help is available
+ set thistest "help catch syscall"
+ gdb_test "help catch syscall" "Catch system calls.*" $thistest
+
+ # Try to set a catchpoint to a nonsense syscall
+ set thistest "catch syscall to a nonsense syscall is prohibited"
+ gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .*" $thistest
+
+ # Testing the 'catch syscall' command without arguments.
+ # This test should catch any syscalls.
+ if [runto_main] then { test_catch_syscall_without_args }
+
+ # Testing the 'catch syscall' command with arguments.
+ # This test should only catch the specified syscall.
+ if [runto_main] then { test_catch_syscall_with_args }
+
+ # Testing the 'catch syscall' command with many arguments.
+ # This test should catch $all_syscalls.
+ if [runto_main] then { test_catch_syscall_with_many_args }
+
+ # Testing the 'catch syscall' command with WRONG arguments.
+ # This test should not trigger any catchpoints.
+ if [runto_main] then { test_catch_syscall_with_wrong_args }
+
+ # Testing the 'catch' syscall command during a restart of
+ # the inferior.
+ if [runto_main] then { test_catch_syscall_restarting_inferior }
+}
+
+proc test_catch_syscall_fail_noxml {} {
+ global gdb_prompt
+
+ # Sanitizing.
+ delete_breakpoints
+
+ # Testing to see if we receive a warning when calling "catch syscall"
+ # without XML support.
+ set thistest "Catch syscall displays a warning when there is no XML support"
+ gdb_test "catch syscall" "warning: Could not open .*warning: Could not load the syscall XML file .*GDB will not be able to display syscall names.*Catchpoint .*(syscall).*" $thistest
+
+ # Since the catchpoint was set, we must check if it's present at
+ # "info breakpoints"
+ check_info_bp_any_syscall
+
+ # Sanitizing.
+ delete_breakpoints
+}
+
+proc test_catch_syscall_without_args_noxml {} {
+ # We will need the syscall names even not using it
+ # because we need to know know many syscalls are in
+ # the example file.
+ global gdb_prompt all_syscalls last_syscall
+
+ delete_breakpoints
+
+ set thistest "Catch syscall without arguments and without XML support"
+ gdb_test "catch syscall" "Catchpoint .*(syscall).*"
+
+ # Now, we should be able to set a catchpoint,
+ # and GDB shall not display the warning anymore.
+ foreach name $all_syscalls {
+ # Unfortunately, we don't know the syscall number
+ # that will be caught because this information is
+ # arch-dependent. Thus, we try to catch anything
+ # similar to a number.
+ check_continue "\[0-9\]*"
+ }
+
+ # At last but not least, we check if the inferior
+ # has called the last (exit) syscall.
+ check_call_to_syscall "\[0-9\]*"
+
+ delete_breakpoints
+}
+
+proc test_catch_syscall_with_args_noxml {} {
+ global gdb_prompt
+
+ # The number of the "close" syscall. This is our
+ # option for a "long-estabilished" syscall in all
+ # Linux architectures, but unfortunately x86_64 and
+ # a few other platforms don't "follow the convention".
+ # Because of this, we need this ugly check :-(.
+ set close_number ""
+ if { [istarget "x86_64-*-linux*"] } {
+ set close_number "3"
+ } else {
+ set close_number "6"
+ }
+
+ delete_breakpoints
+
+ insert_catch_syscall_with_arg $close_number
+
+ check_continue $close_number
+
+ delete_breakpoints
+}
+
+proc test_catch_syscall_with_wrong_args_noxml {} {
+ global gdb_prompt
+
+ delete_breakpoints
+
+ # Even without XML support, GDB should not accept unknown
+ # syscall names for the catchpoint.
+ set thistest "Catch a nonsense syscall without XML support"
+ gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .nonsense_syscall.*" $thistest
+
+ delete_breakpoints
+}
+
+proc do_syscall_tests_without_xml {} {
+ global gdb_prompt srcdir
+
+ # In this case, we don't need to set GDB's datadir because
+ # we want GDB to display only numbers, not names. So, let's
+ # begin with the tests.
+
+ # The first test is to see if GDB displays a warning when we
+ # try to catch syscalls without the XML support.
+ test_catch_syscall_fail_noxml
+
+ # Now, let's test if we can catch syscalls without XML support.
+ # We should succeed, but GDB is not supposed to print syscall names.
+ if [runto_main] then { test_catch_syscall_without_args_noxml }
+
+ # The only valid argument "catch syscall" should accept is the
+ # syscall number, and not the name (since it can't translate a
+ # name to a number).
+ #
+ # It's worth mentioning that we only try to catch the syscall
+ # close(). This is because the syscall number is an arch-dependent
+ # information, so we can't assume that we know every syscall number
+ # in this system. Therefore, we have decided to use a "long-estabilished"
+ # system call, and close() just sounded the right choice :-).
+ if [runto_main] then { test_catch_syscall_with_args_noxml }
+
+ # Now, we'll try to provide a syscall name (valid or not) to the command,
+ # and expect it to fail.
+ if [runto_main] then { test_catch_syscall_with_wrong_args_noxml }
+}
+
+# This procedure fills the vector "all_syscalls_numbers" with the proper
+# numbers for the used syscalls according to the architecture.
+proc fill_all_syscalls_numbers {} {
+ global all_syscalls_numbers
+
+ # For Linux on x86, PPC and PPC64, the numbers for the syscalls "close" and
+ # "chroot" are the same.
+ if { ![istarget "i\[34567\]86-*-linux*"]
+ || ![istarget "powerpc-*-linux*"] || ![istarget "powerpc64-*-linux*"] } {
+ set all_syscalls_numbers { "6" "61" }
+ }
+}
+
+# Start with a fresh gdb
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+# Execute the tests, using XML support
+do_syscall_tests
+
+# Restart gdb
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+# Execute the tests, without XML support. In this case, GDB will
+# only display syscall numbers, and not syscall names.
+do_syscall_tests_without_xml
--- /dev/null
+/* Functions that provide the mechanism to parse a syscall XML file
+ and get its values.
+
+ Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "gdbtypes.h"
+#include "xml-support.h"
+#include "xml-syscall.h"
+
+/* For the struct syscall definition. */
+#include "target.h"
+
+#include "filenames.h"
+
+#include "gdb_assert.h"
+
+#ifndef HAVE_LIBEXPAT
+
+/* Dummy functions to indicate that there's no support for fetching
+ syscalls information. */
+
+static void
+syscall_warn_user (void)
+{
+ static int have_warned = 0;
+ if (!have_warned)
+ {
+ have_warned = 1;
+ warning (_("Can not parse XML syscalls information; XML support was "
+ "disabled at compile time."));
+ }
+}
+
+void
+set_xml_syscall_file_name (const char *name)
+{
+ syscall_warn_user ();
+}
+
+void
+get_syscall_by_number (int syscall_number,
+ struct syscall *s)
+{
+ syscall_warn_user ();
+ s->number = syscall_number;
+ s->name = NULL;
+}
+
+void
+get_syscall_by_name (const char *syscall_name,
+ struct syscall *s)
+{
+ syscall_warn_user ();
+ s->number = UNKNOWN_SYSCALL;
+ s->name = syscall_name;
+}
+
+const char **
+get_syscall_names (void)
+{
+ syscall_warn_user ();
+ return NULL;
+}
+
+
+#else /* ! HAVE_LIBEXPAT */
+
+/* Structure which describes a syscall. */
+typedef struct syscall_desc
+{
+ /* The syscall number. */
+
+ int number;
+
+ /* The syscall name. */
+
+ char *name;
+} *syscall_desc_p;
+DEF_VEC_P(syscall_desc_p);
+
+/* Structure that represents syscalls information. */
+struct syscalls_info
+{
+ /* The syscalls. */
+
+ VEC(syscall_desc_p) *syscalls;
+};
+
+/* Callback data for syscall information parsing. */
+struct syscall_parsing_data
+{
+ /* The syscalls_info we are building. */
+
+ struct syscalls_info *sysinfo;
+};
+
+/* Structure used to store information about the available syscalls in
+ the system. */
+static const struct syscalls_info *_sysinfo = NULL;
+
+/* A flag to tell if we already initialized the structure above. */
+static int have_initialized_sysinfo = 0;
+
+/* The filename of the syscall's XML. */
+static const char *xml_syscall_file = NULL;
+
+static struct syscalls_info *
+allocate_syscalls_info (void)
+{
+ return XZALLOC (struct syscalls_info);
+}
+
+static void
+sysinfo_free_syscalls_desc (struct syscall_desc *sd)
+{
+ xfree (sd->name);
+}
+
+static void
+free_syscalls_info (void *arg)
+{
+ struct syscalls_info *sysinfo = arg;
+ struct syscall_desc *sysdesc;
+ int i;
+
+ for (i = 0;
+ VEC_iterate (syscall_desc_p, sysinfo->syscalls, i, sysdesc);
+ i++)
+ sysinfo_free_syscalls_desc (sysdesc);
+ VEC_free (syscall_desc_p, sysinfo->syscalls);
+
+ xfree (sysinfo);
+}
+
+struct cleanup *
+make_cleanup_free_syscalls_info (struct syscalls_info *sysinfo)
+{
+ return make_cleanup (free_syscalls_info, sysinfo);
+}
+
+static void
+syscall_create_syscall_desc (struct syscalls_info *sysinfo,
+ const char *name, int number)
+{
+ struct syscall_desc *sysdesc = XZALLOC (struct syscall_desc);
+
+ sysdesc->name = xstrdup (name);
+ sysdesc->number = number;
+
+ VEC_safe_push (syscall_desc_p, sysinfo->syscalls, sysdesc);
+}
+
+/* Handle the start of a <syscalls_info> element. */
+static void
+syscall_start_syscalls_info (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data,
+ VEC(gdb_xml_value_s) *attributes)
+{
+ struct syscall_parsing_data *data = user_data;
+ struct syscalls_info *sysinfo = data->sysinfo;
+}
+
+/* Handle the start of a <syscall> element. */
+static void
+syscall_start_syscall (struct gdb_xml_parser *parser,
+ const struct gdb_xml_element *element,
+ void *user_data, VEC(gdb_xml_value_s) *attributes)
+{
+ struct syscall_parsing_data *data = user_data;
+ struct gdb_xml_value *attrs = VEC_address (gdb_xml_value_s, attributes);
+ int len, i;
+ /* syscall info. */
+ char *name = NULL;
+ int number = 0;
+
+ len = VEC_length (gdb_xml_value_s, attributes);
+
+ for (i = 0; i < len; i++)
+ {
+ if (strcmp (attrs[i].name, "name") == 0)
+ name = attrs[i].value;
+ else if (strcmp (attrs[i].name, "number") == 0)
+ number = * (ULONGEST *) attrs[i].value;
+ else
+ internal_error (__FILE__, __LINE__,
+ _("Unknown attribute name '%s'."), attrs[i].name);
+ }
+
+ syscall_create_syscall_desc (data->sysinfo, name, number);
+}
+
+
+/* The elements and attributes of an XML syscall document. */
+static const struct gdb_xml_attribute syscall_attr[] = {
+ { "number", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
+ { "name", GDB_XML_AF_NONE, NULL, NULL },
+ { NULL, GDB_XML_AF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_element syscalls_info_children[] = {
+ { "syscall", syscall_attr, NULL,
+ GDB_XML_EF_OPTIONAL | GDB_XML_EF_REPEATABLE,
+ syscall_start_syscall, NULL },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+static const struct gdb_xml_element syselements[] = {
+ { "syscalls_info", NULL, syscalls_info_children,
+ GDB_XML_EF_NONE, syscall_start_syscalls_info, NULL },
+ { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
+};
+
+static struct syscalls_info *
+syscall_parse_xml (const char *document, xml_fetch_another fetcher,
+ void *fetcher_baton)
+{
+ struct cleanup *result_cleanup;
+ struct gdb_xml_parser *parser;
+ struct syscall_parsing_data data;
+ char *expanded_text;
+ int i;
+
+ parser = gdb_xml_create_parser_and_cleanup (_("syscalls info"),
+ syselements, &data);
+
+ memset (&data, 0, sizeof (struct syscall_parsing_data));
+ data.sysinfo = allocate_syscalls_info ();
+ result_cleanup = make_cleanup_free_syscalls_info (data.sysinfo);
+
+ if (gdb_xml_parse (parser, document) == 0)
+ {
+ /* Parsed successfully. */
+ discard_cleanups (result_cleanup);
+ return data.sysinfo;
+ }
+ else
+ {
+ warning (_("Could not load XML syscalls info; ignoring"));
+ do_cleanups (result_cleanup);
+ return NULL;
+ }
+}
+
+/* Function responsible for initializing the information
+ about the syscalls. It reads the XML file and fills the
+ struct syscalls_info with the values.
+
+ Returns the struct syscalls_info if the file is valid, NULL otherwise. */
+static const struct syscalls_info *
+xml_init_syscalls_info (const char *filename)
+{
+ char *full_file;
+ char *dirname;
+ struct syscalls_info *sysinfo;
+ struct cleanup *back_to;
+
+ full_file = xml_fetch_content_from_file (filename, gdb_datadir);
+ if (full_file == NULL)
+ {
+ warning (_("Could not open \"%s\""), filename);
+ return NULL;
+ }
+
+ back_to = make_cleanup (xfree, full_file);
+
+ dirname = ldirname (filename);
+ if (dirname != NULL)
+ make_cleanup (xfree, dirname);
+
+ sysinfo = syscall_parse_xml (full_file, xml_fetch_content_from_file, dirname);
+ do_cleanups (back_to);
+
+ return sysinfo;
+}
+
+/* Initializes the syscalls_info structure according to the
+ architecture. */
+static void
+init_sysinfo (void)
+{
+ /* Did we already try to initialize the structure? */
+ if (have_initialized_sysinfo)
+ return;
+/* if (xml_syscall_file == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("This architecture has not set the XML syscall file "
+ "name. This is a bug and should not happen; please "
+ "report it.")); */
+
+ _sysinfo = xml_init_syscalls_info (xml_syscall_file);
+
+ have_initialized_sysinfo = 1;
+
+ if (_sysinfo == NULL)
+ {
+ if (xml_syscall_file)
+ /* The initialization failed. Let's show a warning
+ message to the user (just this time) and leave. */
+ warning (_("Could not load the syscall XML file `%s'.\n\
+GDB will not be able to display syscall names."), xml_syscall_file);
+ else
+ /* There's no file to open. Let's warn the user. */
+ warning (_("There is no XML file to open.\n\
+GDB will not be able to display syscall names."));
+ }
+}
+
+static int
+xml_get_syscall_number (const struct syscalls_info *sysinfo,
+ const char *syscall_name)
+{
+ struct syscall_desc *sysdesc;
+ int i;
+
+ if (sysinfo == NULL
+ || syscall_name == NULL)
+ return UNKNOWN_SYSCALL;
+
+ for (i = 0;
+ VEC_iterate(syscall_desc_p, sysinfo->syscalls, i, sysdesc);
+ i++)
+ if (strcmp (sysdesc->name, syscall_name) == 0)
+ return sysdesc->number;
+
+ return UNKNOWN_SYSCALL;
+}
+
+static const char *
+xml_get_syscall_name (const struct syscalls_info *sysinfo,
+ int syscall_number)
+{
+ struct syscall_desc *sysdesc;
+ int i;
+
+ if (sysinfo == NULL
+ || syscall_number < 0)
+ return NULL;
+
+ for (i = 0;
+ VEC_iterate(syscall_desc_p, sysinfo->syscalls, i, sysdesc);
+ i++)
+ if (sysdesc->number == syscall_number)
+ return sysdesc->name;
+
+ return NULL;
+}
+
+static int
+xml_number_of_syscalls (const struct syscalls_info *sysinfo)
+{
+ return (sysinfo == NULL ? 0 : VEC_length (syscall_desc_p,
+ sysinfo->syscalls));
+}
+
+static const char **
+xml_list_of_syscalls (const struct syscalls_info *sysinfo)
+{
+ struct syscall_desc *sysdesc;
+ const char **names = NULL;
+ int nsyscalls;
+ int i;
+
+ if (sysinfo == NULL)
+ return NULL;
+
+ nsyscalls = VEC_length (syscall_desc_p, sysinfo->syscalls);
+ names = xmalloc ((nsyscalls + 1) * sizeof (char *));
+
+ for (i = 0;
+ VEC_iterate (syscall_desc_p, sysinfo->syscalls, i, sysdesc);
+ i++)
+ names[i] = sysdesc->name;
+
+ names[i] = NULL;
+
+ return names;
+}
+
+void
+set_xml_syscall_file_name (const char *name)
+{
+ xml_syscall_file = name;
+}
+
+void
+get_syscall_by_number (int syscall_number,
+ struct syscall *s)
+{
+ init_sysinfo ();
+
+ s->number = syscall_number;
+ s->name = xml_get_syscall_name (_sysinfo, syscall_number);
+}
+
+void
+get_syscall_by_name (const char *syscall_name,
+ struct syscall *s)
+{
+ init_sysinfo ();
+
+ s->number = xml_get_syscall_number (_sysinfo, syscall_name);
+ s->name = syscall_name;
+}
+
+const char **
+get_syscall_names (void)
+{
+ init_sysinfo ();
+
+ return xml_list_of_syscalls (_sysinfo);
+}
+
+#endif /* ! HAVE_LIBEXPAT */
--- /dev/null
+/* Functions that provide the mechanism to parse a syscall XML file
+ and get its values.
+
+ Copyright (C) 2009 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef XML_SYSCALL_H
+#define XML_SYSCALL_H 1
+
+/* Function used to set the name of the file which contains
+ information about the system calls present in the current
+ architecture.
+
+ This function *should* be called before anything else, otherwise
+ GDB won't be able to find the correct XML file to open and get
+ the syscalls definitions. */
+
+void set_xml_syscall_file_name (const char *name);
+
+/* Function that retrieves the syscall name corresponding to the given
+ number. It puts the requested information inside 'struct syscall'. */
+
+void get_syscall_by_number (int syscall_number, struct syscall *s);
+
+/* Function that retrieves the syscall number corresponding to the given
+ name. It puts the requested information inside 'struct syscall'. */
+
+void get_syscall_by_name (const char *syscall_name, struct syscall *s);
+
+/* Function used to retrieve the list of syscalls in the system. This list
+ is returned as an array of strings. Returns the list of syscalls in the
+ system, or NULL otherwise. */
+
+const char **get_syscall_names (void);
+
+#endif /* XML_SYSCALL_H */
projects / binutils-gdb.git / commitdiff