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Return unique_xmalloc_ptr from target_read_stralloc
This changes target_read_stralloc to return a unique_xmalloc_ptr, and then fixes all the callers. unique_xmalloc_ptr is used, rather than std::string, because target_read_stralloc gives a special meaning to a NULL return. ChangeLog 2017-10-16 Tom Tromey <tom@tromey.com> * xml-syscall.c (xml_init_syscalls_info): Update. * xml-support.c (xinclude_start_include): Update. (xml_fetch_content_from_file): Return unique_xmalloc_ptr. * xml-support.h (xml_fetch_another): Return unique_xmalloc_ptr. (xml_fetch_content_from_file): Likewise. * osdata.c (get_osdata): Update. * target.h (target_read_stralloc, target_get_osdata): Return unique_xmalloc_ptr. * solib-aix.c (solib_aix_get_library_list): Update. * solib-target.c (solib_target_current_sos): Update. * solib-svr4.c (svr4_current_sos_via_xfer_libraries): Update. * xml-tdesc.c (fetch_available_features_from_target): Update. (target_fetch_description_xml): Update. (file_read_description_xml): Update. * remote.c (remote_get_threads_with_qxfer, remote_memory_map) (remote_traceframe_info, btrace_read_config, remote_read_btrace) (remote_pid_to_exec_file): Update. * target.c (target_read_stralloc): Return unique_xmalloc_ptr. (target_get_osdata): Likewise.
This commit is contained in:
Tom Tromey
parent
b80406accc
commit
b7b030adc4
@ -1,3 +1,25 @@
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2017-10-16 Tom Tromey <tom@tromey.com>
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* xml-syscall.c (xml_init_syscalls_info): Update.
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* xml-support.c (xinclude_start_include): Update.
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(xml_fetch_content_from_file): Return unique_xmalloc_ptr.
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* xml-support.h (xml_fetch_another): Return unique_xmalloc_ptr.
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(xml_fetch_content_from_file): Likewise.
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* osdata.c (get_osdata): Update.
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* target.h (target_read_stralloc, target_get_osdata): Return
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unique_xmalloc_ptr.
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* solib-aix.c (solib_aix_get_library_list): Update.
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* solib-target.c (solib_target_current_sos): Update.
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* solib-svr4.c (svr4_current_sos_via_xfer_libraries): Update.
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* xml-tdesc.c (fetch_available_features_from_target): Update.
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(target_fetch_description_xml): Update.
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(file_read_description_xml): Update.
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* remote.c (remote_get_threads_with_qxfer, remote_memory_map)
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(remote_traceframe_info, btrace_read_config, remote_read_btrace)
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(remote_pid_to_exec_file): Update.
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* target.c (target_read_stralloc): Return unique_xmalloc_ptr.
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(target_get_osdata): Likewise.
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2017-10-16 Tom Tromey <tom@tromey.com>
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* remote.c (remote_register_number_and_offset): Use std::vector.
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10
gdb/osdata.c
10
gdb/osdata.c
@ -245,13 +245,11 @@ struct osdata *
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get_osdata (const char *type)
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{
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struct osdata *osdata = NULL;
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char *xml = target_get_osdata (type);
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gdb::unique_xmalloc_ptr<char> xml = target_get_osdata (type);
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if (xml)
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{
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struct cleanup *old_chain = make_cleanup (xfree, xml);
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if (xml[0] == '\0')
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if (xml.get ()[0] == '\0')
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{
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if (type)
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warning (_("Empty data returned by target. Wrong osdata type?"));
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@ -259,9 +257,7 @@ get_osdata (const char *type)
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warning (_("Empty type list returned by target. No type data?"));
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}
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else
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osdata = osdata_parse (xml);
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do_cleanups (old_chain);
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osdata = osdata_parse (xml.get ());
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}
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if (!osdata)
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64
gdb/remote.c
64
gdb/remote.c
@ -3203,16 +3203,15 @@ remote_get_threads_with_qxfer (struct target_ops *ops,
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#if defined(HAVE_LIBEXPAT)
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if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
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{
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char *xml = target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
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struct cleanup *back_to = make_cleanup (xfree, xml);
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gdb::unique_xmalloc_ptr<char> xml
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= target_read_stralloc (ops, TARGET_OBJECT_THREADS, NULL);
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if (xml != NULL && *xml != '\0')
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{
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gdb_xml_parse_quick (_("threads"), "threads.dtd",
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threads_elements, xml, context);
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threads_elements, xml.get (), context);
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}
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do_cleanups (back_to);
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return 1;
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}
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#endif
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@ -10893,16 +10892,11 @@ static VEC(mem_region_s) *
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remote_memory_map (struct target_ops *ops)
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{
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VEC(mem_region_s) *result = NULL;
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char *text = target_read_stralloc (¤t_target,
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TARGET_OBJECT_MEMORY_MAP, NULL);
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gdb::unique_xmalloc_ptr<char> text
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= target_read_stralloc (¤t_target, TARGET_OBJECT_MEMORY_MAP, NULL);
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if (text)
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{
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struct cleanup *back_to = make_cleanup (xfree, text);
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result = parse_memory_map (text);
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do_cleanups (back_to);
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}
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result = parse_memory_map (text.get ());
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return result;
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}
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@ -13040,18 +13034,11 @@ remote_set_circular_trace_buffer (struct target_ops *self, int val)
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static traceframe_info_up
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remote_traceframe_info (struct target_ops *self)
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{
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char *text;
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text = target_read_stralloc (¤t_target,
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TARGET_OBJECT_TRACEFRAME_INFO, NULL);
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gdb::unique_xmalloc_ptr<char> text
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= target_read_stralloc (¤t_target, TARGET_OBJECT_TRACEFRAME_INFO,
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NULL);
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if (text != NULL)
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{
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struct cleanup *back_to = make_cleanup (xfree, text);
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traceframe_info_up info = parse_traceframe_info (text);
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do_cleanups (back_to);
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return info;
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}
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return parse_traceframe_info (text.get ());
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return NULL;
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}
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@ -13310,18 +13297,10 @@ btrace_sync_conf (const struct btrace_config *conf)
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static void
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btrace_read_config (struct btrace_config *conf)
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{
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char *xml;
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xml = target_read_stralloc (¤t_target,
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TARGET_OBJECT_BTRACE_CONF, "");
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gdb::unique_xmalloc_ptr<char> xml
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= target_read_stralloc (¤t_target, TARGET_OBJECT_BTRACE_CONF, "");
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if (xml != NULL)
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{
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struct cleanup *cleanup;
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cleanup = make_cleanup (xfree, xml);
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parse_xml_btrace_conf (conf, xml);
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do_cleanups (cleanup);
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}
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parse_xml_btrace_conf (conf, xml.get ());
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}
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/* Maybe reopen target btrace. */
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@ -13492,9 +13471,7 @@ remote_read_btrace (struct target_ops *self,
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enum btrace_read_type type)
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{
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struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
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struct cleanup *cleanup;
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const char *annex;
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char *xml;
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if (packet_config_support (packet) != PACKET_ENABLE)
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error (_("Target does not support branch tracing."));
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@ -13520,14 +13497,12 @@ remote_read_btrace (struct target_ops *self,
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(unsigned int) type);
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}
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xml = target_read_stralloc (¤t_target,
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TARGET_OBJECT_BTRACE, annex);
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gdb::unique_xmalloc_ptr<char> xml
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= target_read_stralloc (¤t_target, TARGET_OBJECT_BTRACE, annex);
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if (xml == NULL)
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return BTRACE_ERR_UNKNOWN;
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cleanup = make_cleanup (xfree, xml);
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parse_xml_btrace (btrace, xml);
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do_cleanups (cleanup);
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parse_xml_btrace (btrace, xml.get ());
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return BTRACE_ERR_NONE;
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}
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@ -13561,16 +13536,13 @@ remote_load (struct target_ops *self, const char *name, int from_tty)
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static char *
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remote_pid_to_exec_file (struct target_ops *self, int pid)
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{
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static char *filename = NULL;
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static gdb::unique_xmalloc_ptr<char> filename;
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struct inferior *inf;
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char *annex = NULL;
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if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
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return NULL;
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if (filename != NULL)
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xfree (filename);
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inf = find_inferior_pid (pid);
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if (inf == NULL)
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internal_error (__FILE__, __LINE__,
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@ -13587,7 +13559,7 @@ remote_pid_to_exec_file (struct target_ops *self, int pid)
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filename = target_read_stralloc (¤t_target,
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TARGET_OBJECT_EXEC_FILE, annex);
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return filename;
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return filename.get ();
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}
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/* Implement the to_can_do_single_step target_ops method. */
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@ -271,39 +271,34 @@ static VEC (lm_info_aix_p) *
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solib_aix_get_library_list (struct inferior *inf, const char *warning_msg)
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{
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struct solib_aix_inferior_data *data;
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char *library_document;
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struct cleanup *cleanup;
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/* If already computed, return the cached value. */
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data = get_solib_aix_inferior_data (inf);
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if (data->library_list != NULL)
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return data->library_list;
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library_document = target_read_stralloc (¤t_target,
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TARGET_OBJECT_LIBRARIES_AIX,
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NULL);
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gdb::unique_xmalloc_ptr<char> library_document
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= target_read_stralloc (¤t_target, TARGET_OBJECT_LIBRARIES_AIX,
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NULL);
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if (library_document == NULL && warning_msg != NULL)
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{
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warning (_("%s (failed to read TARGET_OBJECT_LIBRARIES_AIX)"),
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warning_msg);
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return NULL;
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}
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cleanup = make_cleanup (xfree, library_document);
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if (solib_aix_debug)
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fprintf_unfiltered (gdb_stdlog,
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"DEBUG: TARGET_OBJECT_LIBRARIES_AIX = \n%s\n",
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library_document);
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library_document.get ());
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data->library_list = solib_aix_parse_libraries (library_document);
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data->library_list = solib_aix_parse_libraries (library_document.get ());
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if (data->library_list == NULL && warning_msg != NULL)
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{
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warning (_("%s (missing XML support?)"), warning_msg);
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do_cleanups (cleanup);
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return NULL;
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}
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do_cleanups (cleanup);
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return data->library_list;
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}
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@ -1269,24 +1269,16 @@ static int
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svr4_current_sos_via_xfer_libraries (struct svr4_library_list *list,
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const char *annex)
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{
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char *svr4_library_document;
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int result;
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struct cleanup *back_to;
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gdb_assert (annex == NULL || target_augmented_libraries_svr4_read ());
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/* Fetch the list of shared libraries. */
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svr4_library_document = target_read_stralloc (¤t_target,
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TARGET_OBJECT_LIBRARIES_SVR4,
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annex);
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gdb::unique_xmalloc_ptr<char> svr4_library_document
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= target_read_stralloc (¤t_target, TARGET_OBJECT_LIBRARIES_SVR4,
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annex);
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if (svr4_library_document == NULL)
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return 0;
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back_to = make_cleanup (xfree, svr4_library_document);
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result = svr4_parse_libraries (svr4_library_document, list);
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do_cleanups (back_to);
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return result;
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return svr4_parse_libraries (svr4_library_document.get (), list);
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}
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#else
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@ -248,27 +248,18 @@ static struct so_list *
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solib_target_current_sos (void)
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{
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struct so_list *new_solib, *start = NULL, *last = NULL;
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char *library_document;
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struct cleanup *old_chain;
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VEC(lm_info_target_p) *library_list;
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lm_info_target *info;
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int ix;
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/* Fetch the list of shared libraries. */
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library_document = target_read_stralloc (¤t_target,
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TARGET_OBJECT_LIBRARIES,
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NULL);
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gdb::unique_xmalloc_ptr<char> library_document
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= target_read_stralloc (¤t_target, TARGET_OBJECT_LIBRARIES, NULL);
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if (library_document == NULL)
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return NULL;
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/* solib_target_parse_libraries may throw, so we use a cleanup. */
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old_chain = make_cleanup (xfree, library_document);
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/* Parse the list. */
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library_list = solib_target_parse_libraries (library_document);
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/* library_document string is not needed behind this point. */
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do_cleanups (old_chain);
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library_list = solib_target_parse_libraries (library_document.get ());
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if (library_list == NULL)
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return NULL;
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16
gdb/target.c
16
gdb/target.c
@ -1924,13 +1924,9 @@ target_read_alloc (struct target_ops *ops, enum target_object object,
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return target_read_alloc_1 (ops, object, annex, buf_p, 0);
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}
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/* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
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returned as a string, allocated using xmalloc. If an error occurs
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or the transfer is unsupported, NULL is returned. Empty objects
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are returned as allocated but empty strings. A warning is issued
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if the result contains any embedded NUL bytes. */
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/* See target.h. */
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char *
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gdb::unique_xmalloc_ptr<char>
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target_read_stralloc (struct target_ops *ops, enum target_object object,
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const char *annex)
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{
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@ -1945,7 +1941,7 @@ target_read_stralloc (struct target_ops *ops, enum target_object object,
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return NULL;
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if (transferred == 0)
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return xstrdup ("");
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return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
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bufstr[transferred] = 0;
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@ -1959,7 +1955,7 @@ target_read_stralloc (struct target_ops *ops, enum target_object object,
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break;
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}
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return bufstr;
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return gdb::unique_xmalloc_ptr<char> (bufstr);
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}
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/* Memory transfer methods. */
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@ -2654,7 +2650,9 @@ target_supports_multi_process (void)
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return (*current_target.to_supports_multi_process) (¤t_target);
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}
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char *
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/* See target.h. */
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gdb::unique_xmalloc_ptr<char>
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target_get_osdata (const char *type)
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{
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struct target_ops *t;
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23
gdb/target.h
23
gdb/target.h
@ -353,14 +353,13 @@ extern LONGEST target_read_alloc (struct target_ops *ops,
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const char *annex, gdb_byte **buf_p);
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/* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
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returned as a string, allocated using xmalloc. If an error occurs
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or the transfer is unsupported, NULL is returned. Empty objects
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are returned as allocated but empty strings. A warning is issued
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if the result contains any embedded NUL bytes. */
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returned as a string. If an error occurs or the transfer is
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unsupported, NULL is returned. Empty objects are returned as
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allocated but empty strings. A warning is issued if the result
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contains any embedded NUL bytes. */
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extern char *target_read_stralloc (struct target_ops *ops,
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enum target_object object,
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const char *annex);
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extern gdb::unique_xmalloc_ptr<char> target_read_stralloc
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(struct target_ops *ops, enum target_object object, const char *annex);
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/* See target_ops->to_xfer_partial. */
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extern target_xfer_partial_ftype target_xfer_partial;
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@ -2396,12 +2395,12 @@ extern struct target_ops *find_target_beneath (struct target_ops *);
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struct target_ops *find_target_at (enum strata stratum);
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/* Read OS data object of type TYPE from the target, and return it in
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XML format. The result is NUL-terminated and returned as a string,
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allocated using xmalloc. If an error occurs or the transfer is
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unsupported, NULL is returned. Empty objects are returned as
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allocated but empty strings. */
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XML format. The result is NUL-terminated and returned as a string.
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If an error occurs or the transfer is unsupported, NULL is
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returned. Empty objects are returned as allocated but empty
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strings. */
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extern char *target_get_osdata (const char *type);
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extern gdb::unique_xmalloc_ptr<char> target_get_osdata (const char *type);
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/* Stuff that should be shared among the various remote targets. */
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@ -808,8 +808,6 @@ xinclude_start_include (struct gdb_xml_parser *parser,
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struct xinclude_parsing_data *data
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= (struct xinclude_parsing_data *) user_data;
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char *href = (char *) xml_find_attribute (attributes, "href")->value;
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struct cleanup *back_to;
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char *text, *output;
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gdb_xml_debug (parser, _("Processing XInclude of \"%s\""), href);
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@ -817,19 +815,17 @@ xinclude_start_include (struct gdb_xml_parser *parser,
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gdb_xml_error (parser, _("Maximum XInclude depth (%d) exceeded"),
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MAX_XINCLUDE_DEPTH);
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text = data->fetcher (href, data->fetcher_baton);
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gdb::unique_xmalloc_ptr<char> text = data->fetcher (href,
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data->fetcher_baton);
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if (text == NULL)
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gdb_xml_error (parser, _("Could not load XML document \"%s\""), href);
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back_to = make_cleanup (xfree, text);
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if (!xml_process_xincludes (data->output, parser->name (),
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text, data->fetcher,
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text.get (), data->fetcher,
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data->fetcher_baton,
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data->include_depth + 1))
|
||||
gdb_xml_error (parser, _("Parsing \"%s\" failed"), href);
|
||||
|
||||
do_cleanups (back_to);
|
||||
|
||||
data->skip_depth++;
|
||||
}
|
||||
|
||||
@ -997,13 +993,11 @@ show_debug_xml (struct ui_file *file, int from_tty,
|
||||
fprintf_filtered (file, _("XML debugging is %s.\n"), value);
|
||||
}
|
||||
|
||||
char *
|
||||
gdb::unique_xmalloc_ptr<char>
|
||||
xml_fetch_content_from_file (const char *filename, void *baton)
|
||||
{
|
||||
const char *dirname = (const char *) baton;
|
||||
gdb_file_up file;
|
||||
struct cleanup *back_to;
|
||||
char *text;
|
||||
size_t len, offset;
|
||||
|
||||
if (dirname && *dirname)
|
||||
@ -1024,19 +1018,18 @@ xml_fetch_content_from_file (const char *filename, void *baton)
|
||||
/* Read in the whole file, one chunk at a time. */
|
||||
len = 4096;
|
||||
offset = 0;
|
||||
text = (char *) xmalloc (len);
|
||||
back_to = make_cleanup (free_current_contents, &text);
|
||||
gdb::unique_xmalloc_ptr<char> text ((char *) xmalloc (len));
|
||||
while (1)
|
||||
{
|
||||
size_t bytes_read;
|
||||
|
||||
/* Continue reading where the last read left off. Leave at least
|
||||
one byte so that we can NUL-terminate the result. */
|
||||
bytes_read = fread (text + offset, 1, len - offset - 1, file.get ());
|
||||
bytes_read = fread (text.get () + offset, 1, len - offset - 1,
|
||||
file.get ());
|
||||
if (ferror (file.get ()))
|
||||
{
|
||||
warning (_("Read error from \"%s\""), filename);
|
||||
do_cleanups (back_to);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
@ -1046,12 +1039,10 @@ xml_fetch_content_from_file (const char *filename, void *baton)
|
||||
break;
|
||||
|
||||
len = len * 2;
|
||||
text = (char *) xrealloc (text, len);
|
||||
text.reset ((char *) xrealloc (text.get (), len));
|
||||
}
|
||||
|
||||
discard_cleanups (back_to);
|
||||
|
||||
text[offset] = '\0';
|
||||
text.get ()[offset] = '\0';
|
||||
return text;
|
||||
}
|
||||
|
||||
|
||||
@ -52,7 +52,8 @@ extern const char *xml_builtin[][2];
|
||||
|
||||
/* Callback to fetch a new XML file, based on the provided HREF. */
|
||||
|
||||
typedef char *(*xml_fetch_another) (const char *href, void *baton);
|
||||
typedef gdb::unique_xmalloc_ptr<char> (*xml_fetch_another) (const char *href,
|
||||
void *baton);
|
||||
|
||||
/* Append the expansion of TEXT after processing <xi:include> tags in
|
||||
RESULT. FETCHER will be called (with FETCHER_BATON) to retrieve
|
||||
@ -230,7 +231,7 @@ ULONGEST gdb_xml_parse_ulongest (struct gdb_xml_parser *parser,
|
||||
/* Open FILENAME, read all its text into memory, close it, and return
|
||||
the text. If something goes wrong, return NULL and warn. */
|
||||
|
||||
extern char *xml_fetch_content_from_file (const char *filename,
|
||||
void *baton);
|
||||
extern gdb::unique_xmalloc_ptr<char> xml_fetch_content_from_file
|
||||
(const char *filename, void *baton);
|
||||
|
||||
#endif
|
||||
|
||||
@ -362,22 +362,14 @@ syscall_parse_xml (const char *document, xml_fetch_another fetcher,
|
||||
static struct syscalls_info *
|
||||
xml_init_syscalls_info (const char *filename)
|
||||
{
|
||||
char *full_file;
|
||||
struct syscalls_info *syscalls_info;
|
||||
struct cleanup *back_to;
|
||||
|
||||
full_file = xml_fetch_content_from_file (filename, gdb_datadir);
|
||||
gdb::unique_xmalloc_ptr<char> full_file
|
||||
= xml_fetch_content_from_file (filename, gdb_datadir);
|
||||
if (full_file == NULL)
|
||||
return NULL;
|
||||
|
||||
back_to = make_cleanup (xfree, full_file);
|
||||
|
||||
syscalls_info = syscall_parse_xml (full_file,
|
||||
xml_fetch_content_from_file,
|
||||
(void *) ldirname (filename).c_str ());
|
||||
do_cleanups (back_to);
|
||||
|
||||
return syscalls_info;
|
||||
return syscall_parse_xml (full_file.get (),
|
||||
xml_fetch_content_from_file,
|
||||
(void *) ldirname (filename).c_str ());
|
||||
}
|
||||
|
||||
/* Initializes the syscalls_info structure according to the
|
||||
|
||||
@ -673,24 +673,16 @@ tdesc_parse_xml (const char *document, xml_fetch_another fetcher,
|
||||
const struct target_desc *
|
||||
file_read_description_xml (const char *filename)
|
||||
{
|
||||
struct target_desc *tdesc;
|
||||
char *tdesc_str;
|
||||
struct cleanup *back_to;
|
||||
|
||||
tdesc_str = xml_fetch_content_from_file (filename, NULL);
|
||||
gdb::unique_xmalloc_ptr<char> tdesc_str
|
||||
= xml_fetch_content_from_file (filename, NULL);
|
||||
if (tdesc_str == NULL)
|
||||
{
|
||||
warning (_("Could not open \"%s\""), filename);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
back_to = make_cleanup (xfree, tdesc_str);
|
||||
|
||||
tdesc = tdesc_parse_xml (tdesc_str, xml_fetch_content_from_file,
|
||||
(void *) ldirname (filename).c_str ());
|
||||
do_cleanups (back_to);
|
||||
|
||||
return tdesc;
|
||||
return tdesc_parse_xml (tdesc_str.get (), xml_fetch_content_from_file,
|
||||
(void *) ldirname (filename).c_str ());
|
||||
}
|
||||
|
||||
/* Read a string representation of available features from the target,
|
||||
@ -700,7 +692,7 @@ file_read_description_xml (const char *filename)
|
||||
is "target.xml". Other calls may be performed for the DTD or
|
||||
for <xi:include>. */
|
||||
|
||||
static char *
|
||||
static gdb::unique_xmalloc_ptr<char>
|
||||
fetch_available_features_from_target (const char *name, void *baton_)
|
||||
{
|
||||
struct target_ops *ops = (struct target_ops *) baton_;
|
||||
@ -719,21 +711,14 @@ fetch_available_features_from_target (const char *name, void *baton_)
|
||||
const struct target_desc *
|
||||
target_read_description_xml (struct target_ops *ops)
|
||||
{
|
||||
struct target_desc *tdesc;
|
||||
char *tdesc_str;
|
||||
struct cleanup *back_to;
|
||||
|
||||
tdesc_str = fetch_available_features_from_target ("target.xml", ops);
|
||||
gdb::unique_xmalloc_ptr<char> tdesc_str
|
||||
= fetch_available_features_from_target ("target.xml", ops);
|
||||
if (tdesc_str == NULL)
|
||||
return NULL;
|
||||
|
||||
back_to = make_cleanup (xfree, tdesc_str);
|
||||
tdesc = tdesc_parse_xml (tdesc_str,
|
||||
fetch_available_features_from_target,
|
||||
ops);
|
||||
do_cleanups (back_to);
|
||||
|
||||
return tdesc;
|
||||
return tdesc_parse_xml (tdesc_str.get (),
|
||||
fetch_available_features_from_target,
|
||||
ops);
|
||||
}
|
||||
|
||||
/* Fetches an XML target description using OPS, processing
|
||||
@ -758,7 +743,7 @@ target_fetch_description_xml (struct target_ops *ops)
|
||||
struct target_desc *tdesc;
|
||||
|
||||
gdb::unique_xmalloc_ptr<char>
|
||||
tdesc_str (fetch_available_features_from_target ("target.xml", ops));
|
||||
tdesc_str = fetch_available_features_from_target ("target.xml", ops);
|
||||
if (tdesc_str == NULL)
|
||||
return {};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user