/* Build symbol tables in GDB's internal format.
- Copyright (C) 1986-1996 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 2 of the License, or
-(at your option) any later version.
+ 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.
+ 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, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (BUILDSYM_H)
#define BUILDSYM_H 1
+#include "gdb_obstack.h"
+
+struct objfile;
+struct symbol;
+struct addrmap;
+struct compunit_symtab;
+enum language;
+
/* This module provides definitions used for creating and adding to
the symbol table. These routines are called from various symbol-
- file-reading routines.
+ file-reading routines.
They originated in dbxread.c of gdb-4.2, and were split out to
- make xcoffread.c more maintainable by sharing code.
-
- Variables declared in this file can be defined by #define-ing
- the name EXTERN to null. It is used to declare variables that
- are normally extern, but which get defined in a single module
- using this technique. */
-
-#ifndef EXTERN
-#define EXTERN extern
-#endif
-
-#define HASHSIZE 127 /* Size of things hashed via hashname() */
-
-/* Name of source file whose symbol data we are now processing.
- This comes from a symbol of type N_SO. */
-
-EXTERN char *last_source_file;
+ make xcoffread.c more maintainable by sharing code. */
-/* Core address of start of text of current source file.
- This too comes from the N_SO symbol. */
+struct block;
+struct pending_block;
-EXTERN CORE_ADDR last_source_start_addr;
+struct dynamic_prop;
-/* The list of sub-source-files within the current individual compilation.
- Each file gets its own symtab with its own linetable and associated info,
- but they all share one blockvector. */
+/* The list of sub-source-files within the current individual
+ compilation. Each file gets its own symtab with its own linetable
+ and associated info, but they all share one blockvector. */
struct subfile
{
struct subfile *next;
+ /* Space for this is malloc'd. */
char *name;
- char *dirname;
+ /* Space for this is malloc'd. */
struct linetable *line_vector;
int line_vector_length;
+ /* The "containing" compunit. */
+ struct buildsym_compunit *buildsym_compunit;
enum language language;
- char *debugformat;
+ struct symtab *symtab;
};
-EXTERN struct subfile *subfiles;
+/* Record the symbols defined for each context in a list. We don't
+ create a struct block for the context until we know how long to
+ make it. */
-EXTERN struct subfile *current_subfile;
-
-/* Global variable which, when set, indicates that we are processing a
- .o file compiled with gcc */
-
-EXTERN unsigned char processing_gcc_compilation;
+#define PENDINGSIZE 100
-/* When set, we are processing a .o file compiled by sun acc. This is
- misnamed; it refers to all stabs-in-elf implementations which use
- N_UNDF the way Sun does, including Solaris gcc. Hopefully all
- stabs-in-elf implementations ever invented will choose to be
- compatible. */
+struct pending
+ {
+ struct pending *next;
+ int nsyms;
+ struct symbol *symbol[PENDINGSIZE];
+ };
-EXTERN unsigned char processing_acc_compilation;
+/* Stack representing unclosed lexical contexts (that will become
+ blocks, eventually). */
-/* elz: added this flag to know when a block is compiled with HP
- compilers (cc, aCC). This is necessary because of the macro
- COERCE_FLOAT_TO_DOUBLE defined in tm_hppa.h, which causes
- a coercion of float to double to always occur in parameter passing
- for a function called by gdb (see the function value_arg_coerce in
- valops.c). This is necessary only if the target
- was compiled with gcc, not with HP compilers or with g++ */
+struct context_stack
+ {
+ /* Outer locals at the time we entered */
-EXTERN unsigned char processing_hp_compilation;
+ struct pending *locals;
-/* Count symbols as they are processed, for error messages. */
+ /* Pending using directives at the time we entered. */
-EXTERN unsigned int symnum;
+ struct using_direct *local_using_directives;
-/* Record the symbols defined for each context in a list.
- We don't create a struct block for the context until we
- know how long to make it. */
+ /* Pointer into blocklist as of entry */
-#define PENDINGSIZE 100
+ struct pending_block *old_blocks;
-struct pending
-{
- struct pending *next;
- int nsyms;
- struct symbol *symbol[PENDINGSIZE];
-};
+ /* Name of function, if any, defining context */
-/* Here are the three lists that symbols are put on. */
+ struct symbol *name;
-EXTERN struct pending *file_symbols; /* static at top level, and types */
+ /* Expression that computes the frame base of the lexically enclosing
+ function, if any. NULL otherwise. */
-EXTERN struct pending *global_symbols; /* global functions and variables */
+ struct dynamic_prop *static_link;
-EXTERN struct pending *local_symbols; /* everything local to lexic context */
+ /* PC where this context starts */
-EXTERN struct pending *param_symbols; /* func params local to lexic context */
+ CORE_ADDR start_addr;
-/* Stack representing unclosed lexical contexts
- (that will become blocks, eventually). */
+ /* Temp slot for exception handling. */
-struct context_stack
-{
- /* Outer locals at the time we entered */
+ CORE_ADDR end_addr;
- struct pending *locals;
+ /* For error-checking matching push/pop */
- /* Pending func params at the time we entered */
+ int depth;
- struct pending *params;
+ };
- /* Pointer into blocklist as of entry */
+/* Buildsym's counterpart to struct compunit_symtab. */
- struct pending_block *old_blocks;
+struct buildsym_compunit
+{
+ /* Start recording information about a primary source file (IOW, not an
+ included source file).
+ COMP_DIR is the directory in which the compilation unit was compiled
+ (or NULL if not known). */
+
+ buildsym_compunit (struct objfile *objfile_, const char *name,
+ const char *comp_dir_, enum language language_,
+ CORE_ADDR last_addr);
+
+ /* Reopen an existing compunit_symtab so that additional symbols can
+ be added to it. Arguments are as for the main constructor. CUST
+ is the expandable compunit_symtab to be reopened. */
+
+ buildsym_compunit (struct objfile *objfile_, const char *name,
+ const char *comp_dir_, enum language language_,
+ CORE_ADDR last_addr, struct compunit_symtab *cust)
+ : m_objfile (objfile_),
+ m_last_source_file (name == nullptr ? nullptr : xstrdup (name)),
+ m_comp_dir (comp_dir_ == nullptr ? nullptr : xstrdup (comp_dir_)),
+ m_compunit_symtab (cust),
+ m_language (language_),
+ m_last_source_start_addr (last_addr)
+ {
+ }
+
+ ~buildsym_compunit ();
+
+ DISABLE_COPY_AND_ASSIGN (buildsym_compunit);
+
+ void set_last_source_file (const char *name)
+ {
+ char *new_name = name == NULL ? NULL : xstrdup (name);
+ m_last_source_file.reset (new_name);
+ }
+
+ const char *get_last_source_file ()
+ {
+ return m_last_source_file.get ();
+ }
+
+ struct macro_table *get_macro_table ();
+
+ struct macro_table *release_macros ()
+ {
+ struct macro_table *result = m_pending_macros;
+ m_pending_macros = nullptr;
+ return result;
+ }
+
+ /* This function is called to discard any pending blocks. */
+
+ void free_pending_blocks ()
+ {
+ m_pending_block_obstack.clear ();
+ m_pending_blocks = nullptr;
+ }
+
+ struct block *finish_block (struct symbol *symbol,
+ struct pending_block *old_blocks,
+ const struct dynamic_prop *static_link,
+ CORE_ADDR start, CORE_ADDR end);
+
+ void record_block_range (struct block *block,
+ CORE_ADDR start, CORE_ADDR end_inclusive);
+
+ void start_subfile (const char *name);
+
+ void patch_subfile_names (struct subfile *subfile, const char *name);
+
+ void push_subfile ();
- /* Name of function, if any, defining context*/
+ const char *pop_subfile ();
- struct symbol *name;
+ void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
- /* PC where this context starts */
+ struct compunit_symtab *get_compunit_symtab ()
+ {
+ return m_compunit_symtab;
+ }
+
+ void set_last_source_start_addr (CORE_ADDR addr)
+ {
+ m_last_source_start_addr = addr;
+ }
- CORE_ADDR start_addr;
+ CORE_ADDR get_last_source_start_addr ()
+ {
+ return m_last_source_start_addr;
+ }
- /* Temp slot for exception handling. */
+ struct using_direct **get_local_using_directives ()
+ {
+ return &m_local_using_directives;
+ }
- CORE_ADDR end_addr;
+ void set_local_using_directives (struct using_direct *new_local)
+ {
+ m_local_using_directives = new_local;
+ }
- /* For error-checking matching push/pop */
+ struct using_direct **get_global_using_directives ()
+ {
+ return &m_global_using_directives;
+ }
- int depth;
+ bool outermost_context_p () const
+ {
+ return m_context_stack.empty ();
+ }
-};
+ struct context_stack *get_current_context_stack ()
+ {
+ if (m_context_stack.empty ())
+ return nullptr;
+ return &m_context_stack.back ();
+ }
-EXTERN struct context_stack *context_stack;
+ int get_context_stack_depth () const
+ {
+ return m_context_stack.size ();
+ }
-/* Index of first unused entry in context stack. */
+ struct subfile *get_current_subfile ()
+ {
+ return m_current_subfile;
+ }
-EXTERN int context_stack_depth;
+ struct pending **get_local_symbols ()
+ {
+ return &m_local_symbols;
+ }
-/* Currently allocated size of context stack. */
+ struct pending **get_file_symbols ()
+ {
+ return &m_file_symbols;
+ }
-EXTERN int context_stack_size;
+ struct pending **get_global_symbols ()
+ {
+ return &m_global_symbols;
+ }
-/* Macro "function" for popping contexts from the stack. Pushing is done
- by a real function, push_context. This returns a pointer to a struct
- context_stack. */
+ void record_debugformat (const char *format)
+ {
+ m_debugformat = format;
+ }
-#define pop_context() (&context_stack[--context_stack_depth]);
+ void record_producer (const char *producer)
+ {
+ m_producer = producer;
+ }
-/* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
+ struct context_stack *push_context (int desc, CORE_ADDR valu);
-EXTERN int within_function;
+ struct context_stack pop_context ();
-/* List of blocks already made (lexical contexts already closed).
- This is used at the end to make the blockvector. */
+ struct block *end_symtab_get_static_block (CORE_ADDR end_addr,
+ int expandable, int required);
-struct pending_block
-{
- struct pending_block *next;
- struct block *block;
-};
+ struct compunit_symtab *end_symtab_from_static_block
+ (struct block *static_block, int section, int expandable);
-/* Pointer to the head of a linked list of symbol blocks which have
- already been finalized (lexical contexts already closed) and which are
- just waiting to be built into a blockvector when finalizing the
- associated symtab. */
+ struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section);
-EXTERN struct pending_block *pending_blocks;
+ struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr,
+ int section);
-\f
-struct subfile_stack
-{
- struct subfile_stack *next;
- char *name;
-};
+ void augment_type_symtab ();
-EXTERN struct subfile_stack *subfile_stack;
+private:
-#define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
+ void record_pending_block (struct block *block, struct pending_block *opblock);
-/* Function to invoke get the next symbol. Return the symbol name. */
+ struct block *finish_block_internal (struct symbol *symbol,
+ struct pending **listhead,
+ struct pending_block *old_blocks,
+ const struct dynamic_prop *static_link,
+ CORE_ADDR start, CORE_ADDR end,
+ int is_global, int expandable);
-EXTERN char *(*next_symbol_text_func) PARAMS ((struct objfile *));
+ struct blockvector *make_blockvector ();
-/* Vector of types defined so far, indexed by their type numbers.
- Used for both stabs and coff.
- (In newer sun systems, dbx uses a pair of numbers in parens,
- as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be
- translated through the type_translations hash table to get
- the index into the type vector.) */
+ void watch_main_source_file_lossage ();
-EXTERN struct type **type_vector;
+ struct compunit_symtab *end_symtab_with_blockvector
+ (struct block *static_block, int section, int expandable);
-/* Number of elements allocated for type_vector currently. */
+ /* The objfile we're reading debug info from. */
+ struct objfile *m_objfile;
-EXTERN int type_vector_length;
+ /* List of subfiles (source files).
+ Files are added to the front of the list.
+ This is important mostly for the language determination hacks we use,
+ which iterate over previously added files. */
+ struct subfile *m_subfiles = nullptr;
-/* Initial size of type vector. Is realloc'd larger if needed,
- and realloc'd down to the size actually used, when completed. */
+ /* The subfile of the main source file. */
+ struct subfile *m_main_subfile = nullptr;
-#define INITIAL_TYPE_VECTOR_LENGTH 160
+ /* Name of source file whose symbol data we are now processing. This
+ comes from a symbol of type N_SO for stabs. For DWARF it comes
+ from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
+ gdb::unique_xmalloc_ptr<char> m_last_source_file;
-extern void
-add_symbol_to_list PARAMS ((struct symbol *, struct pending **));
+ /* E.g., DW_AT_comp_dir if DWARF. Space for this is malloc'd. */
+ gdb::unique_xmalloc_ptr<char> m_comp_dir;
-extern struct symbol *
-find_symbol_in_list PARAMS ((struct pending *, char *, int));
+ /* Space for this is not malloc'd, and is assumed to have at least
+ the same lifetime as objfile. */
+ const char *m_producer = nullptr;
-extern void
-finish_block PARAMS ((struct symbol *, struct pending **,
- struct pending_block *, CORE_ADDR, CORE_ADDR,
- struct objfile *));
+ /* Space for this is not malloc'd, and is assumed to have at least
+ the same lifetime as objfile. */
+ const char *m_debugformat = nullptr;
-extern void
-really_free_pendings PARAMS ((int foo));
+ /* The compunit we are building. */
+ struct compunit_symtab *m_compunit_symtab = nullptr;
-extern void
-start_subfile PARAMS ((char *, char *));
+ /* Language of this compunit_symtab. */
+ enum language m_language;
-extern void
-patch_subfile_names PARAMS ((struct subfile *subfile, char *name));
+ /* The macro table for the compilation unit whose symbols we're
+ currently reading. */
+ struct macro_table *m_pending_macros = nullptr;
-extern void
-push_subfile PARAMS ((void));
+ /* True if symtab has line number info. This prevents an otherwise
+ empty symtab from being tossed. */
+ bool m_have_line_numbers = false;
-extern char *
-pop_subfile PARAMS ((void));
+ /* Core address of start of text of current source file. This too
+ comes from the N_SO symbol. For Dwarf it typically comes from the
+ DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */
+ CORE_ADDR m_last_source_start_addr;
-extern struct symtab *
-end_symtab PARAMS ((CORE_ADDR, struct objfile *, int));
+ /* Stack of subfile names. */
+ std::vector<const char *> m_subfile_stack;
-extern void
-scan_file_globals PARAMS ((struct objfile *));
+ /* The "using" directives local to lexical context. */
+ struct using_direct *m_local_using_directives = nullptr;
-extern void
-buildsym_new_init PARAMS ((void));
+ /* Global "using" directives. */
+ struct using_direct *m_global_using_directives = nullptr;
-extern void
-buildsym_init PARAMS ((void));
+ /* The stack of contexts that are pushed by push_context and popped
+ by pop_context. */
+ std::vector<struct context_stack> m_context_stack;
-extern struct context_stack *
-push_context PARAMS ((int, CORE_ADDR));
+ struct subfile *m_current_subfile = nullptr;
-extern void
-record_line PARAMS ((struct subfile *, int, CORE_ADDR));
+ /* The mutable address map for the compilation unit whose symbols
+ we're currently reading. The symtabs' shared blockvector will
+ point to a fixed copy of this. */
+ struct addrmap *m_pending_addrmap = nullptr;
-extern void
-start_symtab PARAMS ((char *, char *, CORE_ADDR));
+ /* The obstack on which we allocate pending_addrmap.
+ If pending_addrmap is NULL, this is uninitialized; otherwise, it is
+ initialized (and holds pending_addrmap). */
+ auto_obstack m_pending_addrmap_obstack;
-extern int
-hashname PARAMS ((char *));
+ /* True if we recorded any ranges in the addrmap that are different
+ from those in the blockvector already. We set this to false when
+ we start processing a symfile, and if it's still false at the
+ end, then we just toss the addrmap. */
+ bool m_pending_addrmap_interesting = false;
-extern void
-free_pending_blocks PARAMS ((void));
+ /* An obstack used for allocating pending blocks. */
+ auto_obstack m_pending_block_obstack;
-/* FIXME: Note that this is used only in buildsym.c and dstread.c,
- which should be fixed to not need direct access to make_blockvector. */
+ /* Pointer to the head of a linked list of symbol blocks which have
+ already been finalized (lexical contexts already closed) and which
+ are just waiting to be built into a blockvector when finalizing the
+ associated symtab. */
+ struct pending_block *m_pending_blocks = nullptr;
-extern struct blockvector *
-make_blockvector PARAMS ((struct objfile *));
+ /* Pending static symbols and types at the top level. */
+ struct pending *m_file_symbols = nullptr;
-/* FIXME: Note that this is used only in buildsym.c and dstread.c,
- which should be fixed to not need direct access to record_pending_block. */
+ /* Pending global functions and variables. */
+ struct pending *m_global_symbols = nullptr;
-extern void
-record_pending_block PARAMS ((struct objfile *, struct block *,
- struct pending_block *));
+ /* Pending symbols that are local to the lexical context. */
+ struct pending *m_local_symbols = nullptr;
+};
-extern void
-record_debugformat PARAMS ((char *));
+\f
-extern void
-merge_symbol_lists PARAMS ((struct pending **, struct pending **));
+extern void add_symbol_to_list (struct symbol *symbol,
+ struct pending **listhead);
-#undef EXTERN
+extern struct symbol *find_symbol_in_list (struct pending *list,
+ char *name, int length);
-#endif /* defined (BUILDSYM_H) */
+#endif /* defined (BUILDSYM_H) */
projects / deliverable / binutils-gdb.git / blobdiff