mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
Introduce minimal_symbol_reader
This patch introduced minimal_symbol_reader, a RAII-based class which replaces the current make_cleanup_discard_minimal_symbols. 2016-10-21 Tom Tromey <tom@tromey.com> * xcoffread.c (xcoff_initial_scan): Use minimal_symbol_reader. * mipsread.c (mipscoff_symfile_read): Use minimal_symbol_reader. * minsyms.h (minimal_symbol_reader): New class. (init_minimal_symbol_collection) (make_cleanup_discard_minimal_symbols, install_minimal_symbols): Don't declare. * minsyms.c (minimal_symbol_reader): Renamed from init_minimal_symbol_collection, turned into constructor. (~minimal_symbol_reader): Renamed from do_discard_minimal_symbols_cleanup, turned into destructor. (make_cleanup_discard_minimal_symbols): Remove. (minimal_symbol_reader::install): Rename form install_minimal_symbols. * mdebugread.c (elfmdebug_build_psymtabs): Use minimal_symbol_reader. * machoread.c (macho_symfile_read): Use minimal_symbol_reader. * elfread.c (elf_read_minimal_symbols): Use minimal_symbol_reader. * dbxread.c (dbx_symfile_read): Use minimal_symbol_reader. * coffread.c (coff_symfile_read): Use minimal_symbol_reader.
This commit is contained in:
Tom Tromey
parent
4b6749b9a4
commit
873a915e0a
@ -1,3 +1,30 @@
|
||||
2016-10-21 Tom Tromey <tom@tromey.com>
|
||||
|
||||
* xcoffread.c (xcoff_initial_scan): Use
|
||||
minimal_symbol_reader.
|
||||
* mipsread.c (mipscoff_symfile_read): Use
|
||||
minimal_symbol_reader.
|
||||
* minsyms.h (minimal_symbol_reader): New class.
|
||||
(init_minimal_symbol_collection)
|
||||
(make_cleanup_discard_minimal_symbols, install_minimal_symbols):
|
||||
Don't declare.
|
||||
* minsyms.c (minimal_symbol_reader): Renamed from
|
||||
init_minimal_symbol_collection, turned into constructor.
|
||||
(~minimal_symbol_reader): Renamed from
|
||||
do_discard_minimal_symbols_cleanup, turned into destructor.
|
||||
(make_cleanup_discard_minimal_symbols): Remove.
|
||||
(minimal_symbol_reader::install): Rename form
|
||||
install_minimal_symbols.
|
||||
* mdebugread.c (elfmdebug_build_psymtabs): Use
|
||||
minimal_symbol_reader.
|
||||
* machoread.c (macho_symfile_read): Use
|
||||
minimal_symbol_reader.
|
||||
* elfread.c (elf_read_minimal_symbols): Use
|
||||
minimal_symbol_reader.
|
||||
* dbxread.c (dbx_symfile_read): Use minimal_symbol_reader.
|
||||
* coffread.c (coff_symfile_read): Use
|
||||
minimal_symbol_reader.
|
||||
|
||||
2016-10-21 Tom Tromey <tom@tromey.com>
|
||||
|
||||
* top.c (new_ui_command, wait_sync_command_done)
|
||||
|
||||
@ -568,7 +568,7 @@ coff_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
unsigned int num_symbols;
|
||||
int symtab_offset;
|
||||
int stringtab_offset;
|
||||
struct cleanup *back_to, *cleanup_minimal_symbols;
|
||||
struct cleanup *back_to;
|
||||
int stabstrsize;
|
||||
|
||||
info = (struct coff_symfile_info *) objfile_data (objfile,
|
||||
@ -645,8 +645,7 @@ coff_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
if (val < 0)
|
||||
error (_("\"%s\": can't get string table"), name);
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
cleanup_minimal_symbols = make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
|
||||
/* Now that the executable file is positioned at symbol table,
|
||||
process it and define symbols accordingly. */
|
||||
@ -656,7 +655,7 @@ coff_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
/* Install any minimal symbols that have been collected as the
|
||||
current minimal symbols for this objfile. */
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
reader.install (objfile);
|
||||
|
||||
if (pe_file)
|
||||
{
|
||||
@ -699,9 +698,6 @@ coff_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
}
|
||||
}
|
||||
|
||||
/* Free the installed minimal symbol data. */
|
||||
do_cleanups (cleanup_minimal_symbols);
|
||||
|
||||
bfd_map_over_sections (abfd, coff_locate_sections, (void *) info);
|
||||
|
||||
if (info->stabsects)
|
||||
|
||||
@ -558,8 +558,7 @@ dbx_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
free_pending_blocks ();
|
||||
back_to = make_cleanup (really_free_pendings, 0);
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
|
||||
/* Read stabs data from executable file and define symbols. */
|
||||
|
||||
@ -572,7 +571,7 @@ dbx_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
/* Install any minimal symbols that have been collected as the current
|
||||
minimal symbols for this objfile. */
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
reader.install (objfile);
|
||||
|
||||
do_cleanups (back_to);
|
||||
}
|
||||
|
||||
@ -1049,8 +1049,8 @@ elf_read_minimal_symbols (struct objfile *objfile, int symfile_flags,
|
||||
return;
|
||||
}
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
back_to = make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
back_to = make_cleanup (null_cleanup, NULL);
|
||||
|
||||
/* Allocate struct to keep track of the symfile. */
|
||||
dbx = XCNEW (struct dbx_symfile_info);
|
||||
@ -1149,7 +1149,7 @@ elf_read_minimal_symbols (struct objfile *objfile, int symfile_flags,
|
||||
responsibility to install them. "mdebug" appears to be the only one
|
||||
which will do this. */
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
reader.install (objfile);
|
||||
do_cleanups (back_to);
|
||||
|
||||
if (symtab_create_debug)
|
||||
|
||||
@ -855,8 +855,7 @@ macho_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
symbol_table = (asymbol **) xmalloc (storage_needed);
|
||||
make_cleanup (xfree, symbol_table);
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
|
||||
symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table);
|
||||
|
||||
@ -867,7 +866,7 @@ macho_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
|
||||
macho_symtab_read (objfile, symcount, symbol_table, &oso_vector);
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
reader.install (objfile);
|
||||
}
|
||||
|
||||
/* Try to read .eh_frame / .debug_frame. */
|
||||
|
||||
@ -4870,14 +4870,12 @@ elfmdebug_build_psymtabs (struct objfile *objfile,
|
||||
{
|
||||
bfd *abfd = objfile->obfd;
|
||||
struct ecoff_debug_info *info;
|
||||
struct cleanup *back_to;
|
||||
|
||||
/* FIXME: It's not clear whether we should be getting minimal symbol
|
||||
information from .mdebug in an ELF file, or whether we will.
|
||||
Re-initialize the minimal symbol reader in case we do. */
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
back_to = make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
|
||||
info = ((struct ecoff_debug_info *)
|
||||
obstack_alloc (&objfile->objfile_obstack,
|
||||
@ -4889,8 +4887,7 @@ elfmdebug_build_psymtabs (struct objfile *objfile,
|
||||
|
||||
mdebug_build_psymtabs (objfile, swap, info);
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
do_cleanups (back_to);
|
||||
reader.install (objfile);
|
||||
}
|
||||
|
||||
void
|
||||
|
||||
@ -921,8 +921,7 @@ get_symbol_leading_char (bfd *abfd)
|
||||
|
||||
/* See minsyms.h. */
|
||||
|
||||
void
|
||||
init_minimal_symbol_collection (void)
|
||||
minimal_symbol_reader::minimal_symbol_reader ()
|
||||
{
|
||||
msym_count = 0;
|
||||
msym_bunch = NULL;
|
||||
@ -932,6 +931,26 @@ init_minimal_symbol_collection (void)
|
||||
msym_bunch_index = BUNCH_SIZE;
|
||||
}
|
||||
|
||||
/* Discard the currently collected minimal symbols, if any. If we wish
|
||||
to save them for later use, we must have already copied them somewhere
|
||||
else before calling this function.
|
||||
|
||||
FIXME: We could allocate the minimal symbol bunches on their own
|
||||
obstack and then simply blow the obstack away when we are done with
|
||||
it. Is it worth the extra trouble though? */
|
||||
|
||||
minimal_symbol_reader::~minimal_symbol_reader ()
|
||||
{
|
||||
struct msym_bunch *next;
|
||||
|
||||
while (msym_bunch != NULL)
|
||||
{
|
||||
next = msym_bunch->next;
|
||||
xfree (msym_bunch);
|
||||
msym_bunch = next;
|
||||
}
|
||||
}
|
||||
|
||||
/* See minsyms.h. */
|
||||
|
||||
void
|
||||
@ -1087,37 +1106,6 @@ compare_minimal_symbols (const void *fn1p, const void *fn2p)
|
||||
}
|
||||
}
|
||||
|
||||
/* Discard the currently collected minimal symbols, if any. If we wish
|
||||
to save them for later use, we must have already copied them somewhere
|
||||
else before calling this function.
|
||||
|
||||
FIXME: We could allocate the minimal symbol bunches on their own
|
||||
obstack and then simply blow the obstack away when we are done with
|
||||
it. Is it worth the extra trouble though? */
|
||||
|
||||
static void
|
||||
do_discard_minimal_symbols_cleanup (void *arg)
|
||||
{
|
||||
struct msym_bunch *next;
|
||||
|
||||
while (msym_bunch != NULL)
|
||||
{
|
||||
next = msym_bunch->next;
|
||||
xfree (msym_bunch);
|
||||
msym_bunch = next;
|
||||
}
|
||||
}
|
||||
|
||||
/* See minsyms.h. */
|
||||
|
||||
struct cleanup *
|
||||
make_cleanup_discard_minimal_symbols (void)
|
||||
{
|
||||
return make_cleanup (do_discard_minimal_symbols_cleanup, 0);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* Compact duplicate entries out of a minimal symbol table by walking
|
||||
through the table and compacting out entries with duplicate addresses
|
||||
and matching names. Return the number of entries remaining.
|
||||
@ -1244,7 +1232,7 @@ build_minimal_symbol_hash_tables (struct objfile *objfile)
|
||||
attempts to demangle them if we later add more minimal symbols. */
|
||||
|
||||
void
|
||||
install_minimal_symbols (struct objfile *objfile)
|
||||
minimal_symbol_reader::install (struct objfile *objfile)
|
||||
{
|
||||
int bindex;
|
||||
int mcount;
|
||||
|
||||
@ -53,21 +53,33 @@ struct bound_minimal_symbol
|
||||
as opaque and use functions provided by minsyms.c to inspect them.
|
||||
*/
|
||||
|
||||
/* Prepare to start collecting minimal symbols. This should be called
|
||||
by a symbol reader to initialize the minimal symbol module.
|
||||
Currently, minimal symbol table creation is not reentrant; it
|
||||
relies on global (static) variables in minsyms.c. */
|
||||
/* An RAII-based object that is used to record minimal symbols while
|
||||
they are being read. */
|
||||
class minimal_symbol_reader
|
||||
{
|
||||
public:
|
||||
|
||||
void init_minimal_symbol_collection (void);
|
||||
/* Prepare to start collecting minimal symbols. This should be called
|
||||
by a symbol reader to initialize the minimal symbol module.
|
||||
Currently, minimal symbol table creation is not reentrant; it
|
||||
relies on global (static) variables in minsyms.c. */
|
||||
|
||||
/* Return a cleanup which is used to clean up the global state left
|
||||
over by minimal symbol creation. After calling
|
||||
init_minimal_symbol_collection, a symbol reader should call this
|
||||
function. Then, after all minimal symbols have been read,
|
||||
regardless of whether they are installed or not, the cleanup
|
||||
returned by this function should be run. */
|
||||
explicit minimal_symbol_reader ();
|
||||
|
||||
struct cleanup *make_cleanup_discard_minimal_symbols (void);
|
||||
~minimal_symbol_reader ();
|
||||
|
||||
/* Install the minimal symbols that have been collected into the
|
||||
given objfile. */
|
||||
|
||||
void install (struct objfile *);
|
||||
|
||||
private:
|
||||
|
||||
/* No need for these. They are intentionally not defined anywhere. */
|
||||
minimal_symbol_reader &operator=
|
||||
(const minimal_symbol_reader &);
|
||||
minimal_symbol_reader (const minimal_symbol_reader &);
|
||||
};
|
||||
|
||||
/* Record a new minimal symbol. This is the "full" entry point;
|
||||
simpler convenience entry points are also provided below.
|
||||
@ -122,13 +134,6 @@ struct minimal_symbol *prim_record_minimal_symbol_and_info
|
||||
int section,
|
||||
struct objfile *);
|
||||
|
||||
/* Install the minimal symbols that have been collected into the given
|
||||
objfile. After this is called, the cleanup returned by
|
||||
make_cleanup_discard_minimal_symbols should be run in order to
|
||||
clean up global state. */
|
||||
|
||||
void install_minimal_symbols (struct objfile *);
|
||||
|
||||
/* Create the terminating entry of OBJFILE's minimal symbol table.
|
||||
If OBJFILE->msymbols is zero, allocate a single entry from
|
||||
OBJFILE->objfile_obstack; otherwise, just initialize
|
||||
|
||||
@ -69,10 +69,8 @@ static void
|
||||
mipscoff_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
{
|
||||
bfd *abfd = objfile->obfd;
|
||||
struct cleanup *back_to;
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
back_to = make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
|
||||
/* Now that the executable file is positioned at symbol table,
|
||||
process it and define symbols accordingly. */
|
||||
@ -91,8 +89,7 @@ mipscoff_symfile_read (struct objfile *objfile, int symfile_flags)
|
||||
/* Install any minimal symbols that have been collected as the current
|
||||
minimal symbols for this objfile. */
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
do_cleanups (back_to);
|
||||
reader.install (objfile);
|
||||
}
|
||||
|
||||
/* Perform any local cleanups required when we are done with a
|
||||
|
||||
@ -3006,8 +3006,7 @@ xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
|
||||
free_pending_blocks ();
|
||||
back_to = make_cleanup (really_free_pendings, 0);
|
||||
|
||||
init_minimal_symbol_collection ();
|
||||
make_cleanup_discard_minimal_symbols ();
|
||||
minimal_symbol_reader reader;
|
||||
|
||||
/* Now that the symbol table data of the executable file are all in core,
|
||||
process them and define symbols accordingly. */
|
||||
@ -3017,7 +3016,7 @@ xcoff_initial_scan (struct objfile *objfile, int symfile_flags)
|
||||
/* Install any minimal symbols that have been collected as the current
|
||||
minimal symbols for this objfile. */
|
||||
|
||||
install_minimal_symbols (objfile);
|
||||
reader.install (objfile);
|
||||
|
||||
/* DWARF2 sections. */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user