* blockframe.c (inside_main_func): No longer use symbol_lookup()

[deliverable/binutils-gdb.git] / gdb / objfiles.h

diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 4dcb6e8c61bfb16e409c3902ed1b105eab40edd5..fe54f6d10edebdc8b0ffee3cecee16eda37ff2d0 100644 (file)
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -1,7 +1,7 @@
 /* Definitions for symbol file management in GDB.
 
    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
 /* Definitions for symbol file management in GDB.
 
    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,

-   2001, 2002 Free Software Foundation, Inc.
+   2001, 2002, 2003 Free Software Foundation, Inc.

 
    This file is part of GDB.
 
 
    This file is part of GDB.
 


@@ -27,6 +27,9 @@
 #include "symfile.h"           /* For struct psymbol_allocation_list */
 
 struct bcache;
 #include "symfile.h"           /* For struct psymbol_allocation_list */
 
 struct bcache;

+struct htab;
+struct symtab;
+struct objfile_data;

 
 /* This structure maintains information on a per-objfile basis about the
    "entry point" of the objfile, and the scope within which the entry point
 
 /* This structure maintains information on a per-objfile basis about the
    "entry point" of the objfile, and the scope within which the entry point


@@ -41,14 +44,28 @@ struct bcache;
    to the user executable's recorded entry point, as if the call had been made
    directly by the kernel.
 
    to the user executable's recorded entry point, as if the call had been made
    directly by the kernel.
 

-   The traditional gdb method of using this info is to use the recorded entry
-   point to set the variables entry_file_lowpc and entry_file_highpc from
-   the debugging information, where these values are the starting address
-   (inclusive) and ending address (exclusive) of the instruction space in the
-   executable which correspond to the "startup file", I.E. crt0.o in most
-   cases.  This file is assumed to be a startup file and frames with pc's
-   inside it are treated as nonexistent.  Setting these variables is necessary
-   so that backtraces do not fly off the bottom of the stack.
+   The traditional gdb method of using this info is to use the
+   recorded entry point to set the variables
+   deprecated_entry_file_lowpc and deprecated_entry_file_highpc from
+   the debugging information, where these values are the starting
+   address (inclusive) and ending address (exclusive) of the
+   instruction space in the executable which correspond to the
+   "startup file", I.E. crt0.o in most cases.  This file is assumed to
+   be a startup file and frames with pc's inside it are treated as
+   nonexistent.  Setting these variables is necessary so that
+   backtraces do not fly off the bottom of the stack.
+
+   NOTE: cagney/2003-09-09: It turns out that this "traditional"
+   method doesn't work.  Corinna writes: ``It turns out that the call
+   to deprecated_inside_entry_file destroys a meaningful backtrace
+   under some conditions.  E. g. the backtrace tests in the asm-source
+   testcase are broken for some targets.  In this test the functions
+   are all implemented as part of one file and the testcase is not
+   necessarily linked with a start file (depending on the target).
+   What happens is, that the first frame is printed normaly and
+   following frames are treated as being inside the enttry file then.
+   This way, only the #0 frame is printed in the backtrace output.''
+   Ref "frame.c" "NOTE: vinschen/2003-04-01".

 
    Gdb also supports an alternate method to avoid running off the bottom
    of the stack.
 
    Gdb also supports an alternate method to avoid running off the bottom
    of the stack.


@@ -64,14 +81,15 @@ struct bcache;
    confused.  However, we almost always have debugging information
    available for main().
 
    confused.  However, we almost always have debugging information
    available for main().
 

-   These variables are used to save the range of PC values which are valid
-   within the main() function and within the function containing the process
-   entry point.  If we always consider the frame for main() as the outermost
-   frame when debugging user code, and the frame for the process entry
-   point function as the outermost frame when debugging startup code, then
-   all we have to do is have FRAME_CHAIN_VALID return false whenever a
-   frame's current PC is within the range specified by these variables.
-   In essence, we set "ceilings" in the frame chain beyond which we will
+   These variables are used to save the range of PC values which are
+   valid within the main() function and within the function containing
+   the process entry point.  If we always consider the frame for
+   main() as the outermost frame when debugging user code, and the
+   frame for the process entry point function as the outermost frame
+   when debugging startup code, then all we have to do is have
+   DEPRECATED_FRAME_CHAIN_VALID return false whenever a frame's
+   current PC is within the range specified by these variables.  In
+   essence, we set "ceilings" in the frame chain beyond which we will

    not proceed when following the frame chain back up the stack.
 
    A nice side effect is that we can still debug startup code without
    not proceed when following the frame chain back up the stack.
 
    A nice side effect is that we can still debug startup code without


@@ -82,9 +100,10 @@ struct bcache;
    information but we do have usable information for main(), backtraces
    from user code don't go wandering off into the startup code.
 
    information but we do have usable information for main(), backtraces
    from user code don't go wandering off into the startup code.
 

-   To use this method, define your FRAME_CHAIN_VALID macro like:
+   To use this method, define your DEPRECATED_FRAME_CHAIN_VALID macro
+   like:

 
 

-   #define FRAME_CHAIN_VALID(chain, thisframe)     \
+   #define DEPRECATED_FRAME_CHAIN_VALID(chain, thisframe)     \

    (chain != 0                                   \
    && !(inside_main_func ((thisframe)->pc))     \
    && !(inside_entry_func ((thisframe)->pc)))
    (chain != 0                                   \
    && !(inside_main_func ((thisframe)->pc))     \
    && !(inside_entry_func ((thisframe)->pc)))


@@ -112,8 +131,8 @@ struct entry_info
     /* Start (inclusive) and end (exclusive) of object file containing the
        entry point. */
 
     /* Start (inclusive) and end (exclusive) of object file containing the
        entry point. */
 

-    CORE_ADDR entry_file_lowpc;
-    CORE_ADDR entry_file_highpc;
+    CORE_ADDR deprecated_entry_file_lowpc;
+    CORE_ADDR deprecated_entry_file_highpc;

 
     /* Start (inclusive) and end (exclusive) of the user code main() function. */
 
 
     /* Start (inclusive) and end (exclusive) of the user code main() function. */
 


@@ -238,7 +257,8 @@ struct objfile
 
     struct objfile *next;
 
 
     struct objfile *next;
 

-    /* The object file's name.  Malloc'd; free it if you free this struct.  */
+    /* The object file's name, tilde-expanded and absolute.
+       Malloc'd; free it if you free this struct.  */

 
     char *name;
 
 
     char *name;
 


@@ -285,6 +305,13 @@ struct objfile
     struct bcache *psymbol_cache;      /* Byte cache for partial syms */
     struct bcache *macro_cache;          /* Byte cache for macros */
 
     struct bcache *psymbol_cache;      /* Byte cache for partial syms */
     struct bcache *macro_cache;          /* Byte cache for macros */
 

+    /* Hash table for mapping symbol names to demangled names.  Each
+       entry in the hash table is actually two consecutive strings,
+       both null-terminated; the first one is a mangled or linkage
+       name, and the second is the demangled name or just a zero byte
+       if the name doesn't demangle.  */
+    struct htab *demangled_names_hash;
+

     /* Vectors of all partial symbols read in from file.  The actual data
        is stored in the psymbol_obstack. */
 
     /* Vectors of all partial symbols read in from file.  The actual data
        is stored in the psymbol_obstack. */
 


@@ -368,6 +395,13 @@ struct objfile
 
     void *obj_private;
 
 
     void *obj_private;
 

+    /* Per objfile data-pointers required by other GDB modules.  */
+    /* FIXME: kettenis/20030711: This mechanism could replace
+       sym_stab_info, sym_private and obj_private entirely.  */
+
+    void **data;
+    unsigned num_data;
+

     /* Set of relocation offsets to apply to each section.
        Currently on the psymbol_obstack (which makes no sense, but I'm
        not sure it's harming anything).
     /* Set of relocation offsets to apply to each section.
        Currently on the psymbol_obstack (which makes no sense, but I'm
        not sure it's harming anything).


@@ -425,6 +459,13 @@ struct objfile
     
     /* Place to stash various statistics about this objfile */
       OBJSTATS;
     
     /* Place to stash various statistics about this objfile */
       OBJSTATS;

+
+    /* A symtab that the C++ code uses to stash special symbols
+       associated to namespaces.  */
+
+    /* FIXME/carlton-2003-06-27: Delete this in a few years once
+       "possible namespace symbols" go away.  */
+    struct symtab *cp_namespace_symtab;

   };
 
 /* Defines for the objfile flag word. */
   };
 
 /* Defines for the objfile flag word. */


@@ -514,6 +555,8 @@ extern struct objfile *allocate_objfile (bfd *, int);
 
 extern int build_objfile_section_table (struct objfile *);
 
 
 extern int build_objfile_section_table (struct objfile *);
 

+extern void terminate_minimal_symbol_table (struct objfile *objfile);
+

 extern void put_objfile_before (struct objfile *, struct objfile *);
 
 extern void objfile_to_front (struct objfile *);
 extern void put_objfile_before (struct objfile *, struct objfile *);
 
 extern void objfile_to_front (struct objfile *);


@@ -552,6 +595,16 @@ extern int in_plt_section (CORE_ADDR, char *);
 
 extern int is_in_import_list (char *, struct objfile *);
 
 
 extern int is_in_import_list (char *, struct objfile *);
 

+/* Keep a registry of per-objfile data-pointers required by other GDB
+   modules.  */
+
+extern const struct objfile_data *register_objfile_data (void);
+extern void set_objfile_data (struct objfile *objfile,
+                             const struct objfile_data *data, void *value);
+extern void *objfile_data (struct objfile *objfile,
+                          const struct objfile_data *data);
+\f
+

 /* Traverse all object files.  ALL_OBJFILES_SAFE works even if you delete
    the objfile during the traversal.  */
 
 /* Traverse all object files.  ALL_OBJFILES_SAFE works even if you delete
    the objfile during the traversal.  */
 


@@ -576,7 +629,7 @@ extern int is_in_import_list (char *, struct objfile *);
 /* Traverse all minimal symbols in one objfile.  */
 
 #define        ALL_OBJFILE_MSYMBOLS(objfile, m) \
 /* Traverse all minimal symbols in one objfile.  */
 
 #define        ALL_OBJFILE_MSYMBOLS(objfile, m) \

-    for ((m) = (objfile) -> msymbols; SYMBOL_NAME(m) != NULL; (m)++)
+    for ((m) = (objfile) -> msymbols; DEPRECATED_SYMBOL_NAME(m) != NULL; (m)++)

 
 /* Traverse all symtabs in all objfiles.  */
 
 
 /* Traverse all symtabs in all objfiles.  */
 


@@ -594,8 +647,7 @@ extern int is_in_import_list (char *, struct objfile *);
 
 #define        ALL_MSYMBOLS(objfile, m) \
   ALL_OBJFILES (objfile)        \
 
 #define        ALL_MSYMBOLS(objfile, m) \
   ALL_OBJFILES (objfile)        \

-    if ((objfile)->msymbols)    \
-      ALL_OBJFILE_MSYMBOLS (objfile, m)
+    ALL_OBJFILE_MSYMBOLS (objfile, m)

 
 #define ALL_OBJFILE_OSECTIONS(objfile, osect)  \
   for (osect = objfile->sections; osect < objfile->sections_end; osect++)
 
 #define ALL_OBJFILE_OSECTIONS(objfile, osect)  \
   for (osect = objfile->sections; osect < objfile->sections_end; osect++)