Add macro structures to GDB's symbol tables. Nobody puts anything

in them yet.
* symtab.h (struct symtab): New member: `macro_table'.
* buildsym.h (pending_macros): New global variable.
* buildsym.c: #include "macrotab.h".
(buildsym_init): Initialize `pending_macros'.
(end_symtab): If we found macro information while reading a CU's
debugging info, do build a symtab structure for it.  Make the
symtab point to the macro information, and clear the
`pending_macros' pointer which held it while we were reading the
debug info.
(really_free_pendings): Free any pending macro table.
* objfiles.h (struct objfile): New member: `macro_cache'.
* objfiles.c (allocate_objfile): Set allocate and free functions
for the macro cache's objstack.
(free_objfile): Empty the macro cache's obstack.
* symfile.c (reread_symbols): Empty the macro cache's obstack, and
set new allocate and free functions for it.
* solib-sunos.c (allocate_rt_common_objfile): Set allocate and
free functions for the macro cache's objstack.  (Why is this
function building its own objfile?)
* symmisc.c (print_objfile_statistics): Print statistics on the
macro bcache.
* Makefile.in: Note that buildsym.o depends on macrotab.h.

gdb/ChangeLog

@@ -1,3 +1,30 @@
+2002-05-15  Jim Blandy  <jimb@redhat.com>
+
+	Add macro structures to GDB's symbol tables.  Nobody puts anything
+	in them yet.
+	* symtab.h (struct symtab): New member: `macro_table'.
+	* buildsym.h (pending_macros): New global variable.
+	* buildsym.c: #include "macrotab.h".
+	(buildsym_init): Initialize `pending_macros'.
+	(end_symtab): If we found macro information while reading a CU's
+	debugging info, do build a symtab structure for it.  Make the
+	symtab point to the macro information, and clear the
+	`pending_macros' pointer which held it while we were reading the
+	debug info.
+	(really_free_pendings): Free any pending macro table.
+	* objfiles.h (struct objfile): New member: `macro_cache'.
+	* objfiles.c (allocate_objfile): Set allocate and free functions
+	for the macro cache's objstack.
+	(free_objfile): Empty the macro cache's obstack.
+	* symfile.c (reread_symbols): Empty the macro cache's obstack, and
+	set new allocate and free functions for it.
+	* solib-sunos.c (allocate_rt_common_objfile): Set allocate and
+	free functions for the macro cache's objstack.  (Why is this
+	function building its own objfile?)
+	* symmisc.c (print_objfile_statistics): Print statistics on the
+	macro bcache.
+	* Makefile.in: Note that buildsym.o depends on macrotab.h.
+
 2002-05-15  Richard Earnshaw  <rearnsha@arm.com>
 
 	* config/arm/nm-nbsd.h: Use <> for include of config/nm-nbsd.h.

gdb/Makefile.in

@@ -1309,7 +1309,8 @@ breakpoint.o: breakpoint.c $(defs_h) $(gdbcmd_h) $(gdbcore_h) \
 buildsym.o: buildsym.c $(bfd_h) $(buildsym_h) $(complaints_h) $(defs_h) \
 	$(objfiles_h) $(symfile_h) $(symtab_h) $(gdb_string_h) \
 	$(obstack_h) $(symtab_h) $(gdbtypes_h) $(expression_h) \
-	$(language_h) $(bcache_h) $(filenames_h) $(stabsread_h)
+	$(language_h) $(bcache_h) $(filenames_h) $(stabsread_h) \
+	$(macrotab_h)
 
 builtin-regs.o: builtin-regs.c $(defs.h) $(builtin_regs_h) $(gdbtypes_h) \
 	$(gdb_string_h) $(value_h) $(frame_h)

gdb/buildsym.c

@@ -39,6 +39,7 @@
 #include "language.h"		/* For "local_hex_string" */
 #include "bcache.h"
 #include "filenames.h"		/* For DOSish file names */
+#include "macrotab.h"
 /* Ask buildsym.h to define the vars it normally declares `extern'.  */
 #define	EXTERN
 /**/
@@ -192,6 +193,9 @@ really_free_pendings (PTR dummy)
       xfree ((void *) next);
     }
   global_symbols = NULL;
+
+  if (pending_macros)
+    free_macro_table (pending_macros);
 }
 
 /* This function is called to discard any pending blocks. */
@@ -883,7 +887,8 @@ end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section)
   if (pending_blocks == NULL
       && file_symbols == NULL
       && global_symbols == NULL
-      && have_line_numbers == 0)
+      && have_line_numbers == 0
+      && pending_macros == NULL)
     {
       /* Ignore symtabs that have no functions with real debugging
          info.  */
@@ -944,6 +949,7 @@ end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section)
 
 	  /* Fill in its components.  */
 	  symtab->blockvector = blockvector;
+          symtab->macro_table = pending_macros;
 	  if (subfile->line_vector)
 	    {
 	      /* Reallocate the line table on the symbol obstack */
@@ -1022,6 +1028,7 @@ end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section)
 
   last_source_file = NULL;
   current_subfile = NULL;
+  pending_macros = NULL;
 
   return symtab;
 }
@@ -1112,6 +1119,7 @@ buildsym_init (void)
   file_symbols = NULL;
   global_symbols = NULL;
   pending_blocks = NULL;
+  pending_macros = NULL;
 }
 
 /* Initialize anything that needs initializing when a completely new

gdb/buildsym.h

@@ -296,6 +296,10 @@ extern void record_debugformat (char *format);
 extern void merge_symbol_lists (struct pending **srclist,
 				struct pending **targetlist);
 
+/* The macro table for the compilation unit whose symbols we're
+   currently reading.  All the symtabs for this CU will point to this.  */
+EXTERN struct macro_table *pending_macros;
+
 #undef EXTERN
 
 #endif /* defined (BUILDSYM_H) */

gdb/objfiles.c

@@ -190,6 +190,8 @@ allocate_objfile (bfd *abfd, int flags)
 	      /* Update pointers to functions to *our* copies */
 	      obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc);
 	      obstack_freefun (&objfile->psymbol_cache.cache, xmfree);
+	      obstack_chunkfun (&objfile->macro_cache.cache, xmmalloc);
+	      obstack_freefun (&objfile->macro_cache.cache, xmfree);
 	      obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc);
 	      obstack_freefun (&objfile->psymbol_obstack, xmfree);
 	      obstack_chunkfun (&objfile->symbol_obstack, xmmalloc);
@@ -220,6 +222,9 @@ allocate_objfile (bfd *abfd, int flags)
 	      obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache,
 						   0, 0, xmmalloc, xmfree,
 						   objfile->md);
+	      obstack_specify_allocation_with_arg (&objfile->macro_cache.cache,
+						   0, 0, xmmalloc, xmfree,
+						   objfile->md);
 	      obstack_specify_allocation_with_arg (&objfile->psymbol_obstack,
 						   0, 0, xmmalloc, xmfree,
 						   objfile->md);
@@ -266,6 +271,8 @@ allocate_objfile (bfd *abfd, int flags)
       objfile->md = NULL;
       obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
 				  xmalloc, xfree);
+      obstack_specify_allocation (&objfile->macro_cache.cache, 0, 0,
+				  xmalloc, xfree);
       obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc,
 				  xfree);
       obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc,
@@ -477,6 +484,7 @@ free_objfile (struct objfile *objfile)
 	xmfree (objfile->md, objfile->static_psymbols.list);
       /* Free the obstacks for non-reusable objfiles */
       free_bcache (&objfile->psymbol_cache);
+      free_bcache (&objfile->macro_cache);
       obstack_free (&objfile->psymbol_obstack, 0);
       obstack_free (&objfile->symbol_obstack, 0);
       obstack_free (&objfile->type_obstack, 0);

gdb/objfiles.h

@@ -277,6 +277,7 @@ struct objfile
        will not change. */
 
     struct bcache psymbol_cache;	/* Byte cache for partial syms */
+    struct bcache macro_cache;          /* Byte cache for macros */
 
     /* Vectors of all partial symbols read in from file.  The actual data
        is stored in the psymbol_obstack. */

gdb/solib-sunos.c

@@ -137,6 +137,8 @@ allocate_rt_common_objfile (void)
   objfile->md = NULL;
   obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
 			      xmalloc, xfree);
+  obstack_specify_allocation (&objfile->macro_cache.cache, 0, 0,
+			      xmalloc, xfree);
   obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc,
 			      xfree);
   obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc,

gdb/symfile.c

@@ -1741,6 +1741,7 @@ reread_symbols (void)
 
 	      /* Free the obstacks for non-reusable objfiles */
 	      free_bcache (&objfile->psymbol_cache);
+	      free_bcache (&objfile->macro_cache);
 	      obstack_free (&objfile->psymbol_obstack, 0);
 	      obstack_free (&objfile->symbol_obstack, 0);
 	      obstack_free (&objfile->type_obstack, 0);
@@ -1766,6 +1767,8 @@ reread_symbols (void)
 	         it is empty.  */
 	      obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
 					  xmalloc, xfree);
+	      obstack_specify_allocation (&objfile->macro_cache.cache, 0, 0,
+					  xmalloc, xfree);
 	      obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
 					  xmalloc, xfree);
 	      obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,

gdb/symmisc.c

@@ -197,6 +197,8 @@ print_objfile_statistics (void)
 		     obstack_memory_used (&objfile->psymbol_obstack));
     printf_filtered ("  Total memory used for psymbol cache: %d\n",
 		     obstack_memory_used (&objfile->psymbol_cache.cache));
+    printf_filtered ("  Total memory used for macro cache: %d\n",
+		     obstack_memory_used (&objfile->macro_cache.cache));
     printf_filtered ("  Total memory used for symbol obstack: %d\n",
 		     obstack_memory_used (&objfile->symbol_obstack));
     printf_filtered ("  Total memory used for type obstack: %d\n",

gdb/symtab.h

@@ -824,6 +824,11 @@ struct symtab
 
     int primary;
 
+    /* The macro table for this symtab.  Like the blockvector, this
+       may be shared between different symtabs --- and normally is for
+       all the symtabs in a given compilation unit.  */
+    struct macro_table *macro_table;
+
     /* Name of this source file.  */
 
     char *filename;