+
+\f
+/* Initialize the language dependent portion of a symbol
+ depending upon the language for the symbol. */
+void
+symbol_init_language_specific (struct general_symbol_info *gsymbol,
+ enum language language)
+{
+ gsymbol->language = language;
+ if (gsymbol->language == language_cplus
+ || gsymbol->language == language_java
+ || gsymbol->language == language_objc)
+ {
+ gsymbol->language_specific.cplus_specific.demangled_name = NULL;
+ }
+ else
+ {
+ memset (&gsymbol->language_specific, 0,
+ sizeof (gsymbol->language_specific));
+ }
+}
+
+/* Functions to initialize a symbol's mangled name. */
+
+/* Create the hash table used for demangled names. Each hash entry is
+ a pair of strings; one for the mangled name and one for the demangled
+ name. The entry is hashed via just the mangled name. */
+
+static void
+create_demangled_names_hash (struct objfile *objfile)
+{
+ /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
+ The hash table code will round this up to the next prime number.
+ Choosing a much larger table size wastes memory, and saves only about
+ 1% in symbol reading. */
+
+ objfile->demangled_names_hash = htab_create_alloc_ex
+ (256, htab_hash_string, (int (*) (const void *, const void *)) streq,
+ NULL, objfile->md, xmcalloc, xmfree);
+}
+
+/* Try to determine the demangled name for a symbol, based on the
+ language of that symbol. If the language is set to language_auto,
+ it will attempt to find any demangling algorithm that works and
+ then set the language appropriately. The returned name is allocated
+ by the demangler and should be xfree'd. */
+
+static char *
+symbol_find_demangled_name (struct general_symbol_info *gsymbol,
+ const char *mangled)
+{
+ char *demangled = NULL;
+
+ if (gsymbol->language == language_unknown)
+ gsymbol->language = language_auto;
+
+ if (gsymbol->language == language_objc
+ || gsymbol->language == language_auto)
+ {
+ demangled =
+ objc_demangle (mangled, 0);
+ if (demangled != NULL)
+ {
+ gsymbol->language = language_objc;
+ return demangled;
+ }
+ }
+ if (gsymbol->language == language_cplus
+ || gsymbol->language == language_auto)
+ {
+ demangled =
+ cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
+ if (demangled != NULL)
+ {
+ gsymbol->language = language_cplus;
+ return demangled;
+ }
+ }
+ if (gsymbol->language == language_java)
+ {
+ demangled =
+ cplus_demangle (mangled,
+ DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
+ if (demangled != NULL)
+ {
+ gsymbol->language = language_java;
+ return demangled;
+ }
+ }
+ return NULL;
+}
+
+/* Set both the mangled and demangled (if any) names for GSYMBOL based
+ on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
+ is used, and the memory comes from that objfile's symbol_obstack.
+ LINKAGE_NAME is copied, so the pointer can be discarded after
+ calling this function. */
+
+/* We have to be careful when dealing with Java names: when we run
+ into a Java minimal symbol, we don't know it's a Java symbol, so it
+ gets demangled as a C++ name. This is unfortunate, but there's not
+ much we can do about it: but when demangling partial symbols and
+ regular symbols, we'd better not reuse the wrong demangled name.
+ (See PR gdb/1039.) We solve this by putting a distinctive prefix
+ on Java names when storing them in the hash table. */
+
+/* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
+ don't mind the Java prefix so much: different languages have
+ different demangling requirements, so it's only natural that we
+ need to keep language data around in our demangling cache. But
+ it's not good that the minimal symbol has the wrong demangled name.
+ Unfortunately, I can't think of any easy solution to that
+ problem. */
+
+#define JAVA_PREFIX "##JAVA$$"
+#define JAVA_PREFIX_LEN 8
+
+void
+symbol_set_names (struct general_symbol_info *gsymbol,
+ const char *linkage_name, int len, struct objfile *objfile)
+{
+ char **slot;
+ /* A 0-terminated copy of the linkage name. */
+ const char *linkage_name_copy;
+ /* A copy of the linkage name that might have a special Java prefix
+ added to it, for use when looking names up in the hash table. */
+ const char *lookup_name;
+ /* The length of lookup_name. */
+ int lookup_len;
+
+ if (objfile->demangled_names_hash == NULL)
+ create_demangled_names_hash (objfile);
+
+ /* The stabs reader generally provides names that are not
+ NUL-terminated; most of the other readers don't do this, so we
+ can just use the given copy, unless we're in the Java case. */
+ if (gsymbol->language == language_java)
+ {
+ char *alloc_name;
+ lookup_len = len + JAVA_PREFIX_LEN;
+
+ alloc_name = alloca (lookup_len + 1);
+ memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
+ memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
+ alloc_name[lookup_len] = '\0';
+
+ lookup_name = alloc_name;
+ linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
+ }
+ else if (linkage_name[len] != '\0')
+ {
+ char *alloc_name;
+ lookup_len = len;
+
+ alloc_name = alloca (lookup_len + 1);
+ memcpy (alloc_name, linkage_name, len);
+ alloc_name[lookup_len] = '\0';
+
+ lookup_name = alloc_name;
+ linkage_name_copy = alloc_name;
+ }
+ else
+ {
+ lookup_len = len;
+ lookup_name = linkage_name;
+ linkage_name_copy = linkage_name;
+ }
+
+ slot = (char **) htab_find_slot (objfile->demangled_names_hash,
+ lookup_name, INSERT);
+
+ /* If this name is not in the hash table, add it. */
+ if (*slot == NULL)
+ {
+ char *demangled_name = symbol_find_demangled_name (gsymbol,
+ linkage_name_copy);
+ int demangled_len = demangled_name ? strlen (demangled_name) : 0;
+
+ /* If there is a demangled name, place it right after the mangled name.
+ Otherwise, just place a second zero byte after the end of the mangled
+ name. */
+ *slot = obstack_alloc (&objfile->symbol_obstack,
+ lookup_len + demangled_len + 2);
+ memcpy (*slot, lookup_name, lookup_len + 1);
+ if (demangled_name != NULL)
+ {
+ memcpy (*slot + lookup_len + 1, demangled_name, demangled_len + 1);
+ xfree (demangled_name);
+ }
+ else
+ (*slot)[lookup_len + 1] = '\0';
+ }
+
+ gsymbol->name = *slot + lookup_len - len;
+ if ((*slot)[lookup_len + 1] != '\0')
+ gsymbol->language_specific.cplus_specific.demangled_name
+ = &(*slot)[lookup_len + 1];
+ else
+ gsymbol->language_specific.cplus_specific.demangled_name = NULL;
+}
+
+/* Initialize the demangled name of GSYMBOL if possible. Any required space
+ to store the name is obtained from the specified obstack. The function
+ symbol_set_names, above, should be used instead where possible for more
+ efficient memory usage. */
+
+void
+symbol_init_demangled_name (struct general_symbol_info *gsymbol,
+ struct obstack *obstack)
+{
+ char *mangled = gsymbol->name;
+ char *demangled = NULL;
+
+ demangled = symbol_find_demangled_name (gsymbol, mangled);
+ if (gsymbol->language == language_cplus
+ || gsymbol->language == language_java
+ || gsymbol->language == language_objc)
+ {
+ if (demangled)
+ {
+ gsymbol->language_specific.cplus_specific.demangled_name
+ = obsavestring (demangled, strlen (demangled), obstack);
+ xfree (demangled);
+ }
+ else
+ gsymbol->language_specific.cplus_specific.demangled_name = NULL;
+ }
+ else
+ {
+ /* Unknown language; just clean up quietly. */
+ if (demangled)
+ xfree (demangled);
+ }
+}
+
+/* Return the source code name of a symbol. In languages where
+ demangling is necessary, this is the demangled name. */
+
+char *
+symbol_natural_name (const struct general_symbol_info *gsymbol)
+{
+ if ((gsymbol->language == language_cplus
+ || gsymbol->language == language_java
+ || gsymbol->language == language_objc)
+ && (gsymbol->language_specific.cplus_specific.demangled_name != NULL))
+ {
+ return gsymbol->language_specific.cplus_specific.demangled_name;
+ }
+ else
+ {
+ return gsymbol->name;
+ }
+}
+
+/* Return the demangled name for a symbol based on the language for
+ that symbol. If no demangled name exists, return NULL. */
+char *
+symbol_demangled_name (struct general_symbol_info *gsymbol)
+{
+ if (gsymbol->language == language_cplus
+ || gsymbol->language == language_java
+ || gsymbol->language == language_objc)
+ return gsymbol->language_specific.cplus_specific.demangled_name;
+
+ else
+ return NULL;
+}
+
+/* Initialize the structure fields to zero values. */
+void
+init_sal (struct symtab_and_line *sal)
+{
+ sal->symtab = 0;
+ sal->section = 0;
+ sal->line = 0;
+ sal->pc = 0;
+ sal->end = 0;
+}
projects / deliverable / binutils-gdb.git / blobdiff