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darling-gdb/gdb/maint.c
Michael Snyder b9580b812c Thu Apr 3 15:10:30 1997 Michael Snyder <msnyder@cleaver.cygnus.com> 
Except for the two m32r modules, this checkin is for
	overlay support.

        * blockframe.c: blockvector_for_pc_sect(), block_for_pc_sect(),
        find_pc_sect_function(), find_pc_sect_partial_function(): new
        functions for debugging overlays; pc without section is ambiguous.
        * breakpoint.[ch]: add section pointer to breakpoint struct;
        add section argument to check_duplicates(); check section as well
        as pc in [breakpoint_here_p(), breakpoint_inserted_here_p(),
        breakpoint_thread_match(), bpstat_stop_status()];
        add section argument to describe_other_breakpoints();
        use INIT_SAL() macro to zero-out new sal structures;
        make resolve_sal_pc() fix up the sal's section as well as its pc;
        match on section + pc in clear_command() and delete_breakpoint();
        account for overlay sections in insert_breakpoints(),
        remove_breakpoint() and breakpoint_re_set_one();
        all this to support overlays where a PC is not unique.
        * exec.c: change xfer_memory() to handle overlay sections.
        * findvar.c: change read_var_value() to handle overlay sections.
        * frame.h: declaration for block_for_pc_sect() [blockframe.c].
        * infcmd.c: jump_command() warns against jumping into an overlay
        that's not in memory.  Also use INIT_SAL() to initialize sals.
        * infrun.c: wait_for_inferior() sets a flag to invalidate cached
        overlay state information; Also use INIT_SAL() to init sals.
        * m32r-rom.c: modify load routines to use LMA instead of VMA.
        * m32r-stub.c: mask exit value down to 8 bits; screen out any
        memory read/writes in the range 600000 to a00000, and ff680000
        to ff800000 (hangs because nothing is mapped there); fix strcpy().
        * maint.c: maintenance command "translate-address" supports overlays.
        * minsyms.c: lookup_minimal_symbol_by_pc_sect() supports overlays.
        * objfiles.[ch]: add ovly_mapped field to the obj_section struct;
        this constitutes gdb's internal overlay mapping table.  Add macro
        ALL_OBJSECTIONS() to loop thru the obj_structs and look at overlays.
        Add function find_pc_sect_section().
        * printcmd.c: modify print_address_symbolic() with overlay smarts;
        modify address_info() with overlay smarts; add function sym_info()
        to support the INFO SYMBOL command (translate address to symbol(s));
        modify disassemble_command() to work on unmapped overlays.
        * source.c: use INIT_SAL() to initialize sals.
        * symfile.[ch]: change generic_load() to use section's LMA address
        instead of VMA address, for overlay sections.
        Add numerous functions for finding a PC's section / overlay,
        translating between VMA and LMA address ranges, determining if an
        overlay section is mapped, etc.  Add several user commands for
        overlay debugging.  Add support for a "generic" form of automatically
        reading overlay mapping info from the inferior (based on the default
        (simple) overlay manager which Cygnus provides as an example).
        * symtab.[ch]: add functions find_pc_sect_symtab(),
        find_pc_sect_psymtab(), find_pc_sect_psymbol(), find_pc_sect_line()
        for lookup; modify lookup_symbol and decode_line_1() to use them;
        modify find_function_start_sal() to account for overlay sections;
        add macro INIT_SAL() for initializing struct symtab_and_line.
        * target.c: fix a comment in the declaration of target_ops.
1997-04-03 23:19:46 +00:00

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/* Support for GDB maintenance commands.
Copyright 1992, 1993, 1994 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
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 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. */
#include "defs.h"
#if MAINTENANCE_CMDS /* Entire rest of file goes away if not including maint cmds */
#include <ctype.h>
#include <signal.h>
#include "command.h"
#include "gdbcmd.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "demangle.h"
#include "gdbcore.h"
#include "expression.h" /* For language.h */
#include "language.h"
#include "symfile.h"
#include "objfiles.h"
#include "value.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
static void maintenance_command PARAMS ((char *, int));
static void maintenance_dump_me PARAMS ((char *, int));
static void maintenance_demangle PARAMS ((char *, int));
static void maintenance_time_display PARAMS ((char *, int));
static void maintenance_space_display PARAMS ((char *, int));
static void maintenance_info_command PARAMS ((char *, int));
static void print_section_table PARAMS ((bfd *, asection *, PTR));
static void maintenance_info_sections PARAMS ((char *, int));
static void maintenance_print_command PARAMS ((char *, int));
/* Set this to the maximum number of seconds to wait instead of waiting forever
in target_wait(). If this timer times out, then it generates an error and
the command is aborted. This replaces most of the need for timeouts in the
GDB test suite, and makes it possible to distinguish between a hung target
and one with slow communications. */
int watchdog = 0;
/*
LOCAL FUNCTION
maintenance_command -- access the maintenance subcommands
SYNOPSIS
void maintenance_command (char *args, int from_tty)
DESCRIPTION
*/
static void
maintenance_command (args, from_tty)
char *args;
int from_tty;
{
printf_unfiltered ("\"maintenance\" must be followed by the name of a maintenance command.\n");
help_list (maintenancelist, "maintenance ", -1, gdb_stdout);
}
#ifndef _WIN32
/* ARGSUSED */
static void
maintenance_dump_me (args, from_tty)
char *args;
int from_tty;
{
if (query ("Should GDB dump core? "))
{
signal (SIGQUIT, SIG_DFL);
kill (getpid (), SIGQUIT);
}
}
#endif
/* Someday we should allow demangling for things other than just
explicit strings. For example, we might want to be able to
specify the address of a string in either GDB's process space
or the debuggee's process space, and have gdb fetch and demangle
that string. If we have a char* pointer "ptr" that points to
a string, we might want to be able to given just the name and
have GDB demangle and print what it points to, etc. (FIXME) */
static void
maintenance_demangle (args, from_tty)
char *args;
int from_tty;
{
char *demangled;
if (args == NULL || *args == '\0')
{
printf_unfiltered ("\"maintenance demangle\" takes an argument to demangle.\n");
}
else
{
demangled = cplus_demangle (args, DMGL_ANSI | DMGL_PARAMS);
if (demangled != NULL)
{
printf_unfiltered ("%s\n", demangled);
free (demangled);
}
else
{
printf_unfiltered ("Can't demangle \"%s\"\n", args);
}
}
}
static void
maintenance_time_display (args, from_tty)
char *args;
int from_tty;
{
extern int display_time;
if (args == NULL || *args == '\0')
printf_unfiltered ("\"maintenance time\" takes a numeric argument.\n");
else
display_time = strtol (args, NULL, 10);
}
static void
maintenance_space_display (args, from_tty)
char *args;
int from_tty;
{
extern int display_space;
if (args == NULL || *args == '\0')
printf_unfiltered ("\"maintenance space\" takes a numeric argument.\n");
else
display_space = strtol (args, NULL, 10);
}
/* The "maintenance info" command is defined as a prefix, with allow_unknown 0.
Therefore, its own definition is called only for "maintenance info" with
no args. */
/* ARGSUSED */
static void
maintenance_info_command (arg, from_tty)
char *arg;
int from_tty;
{
printf_unfiltered ("\"maintenance info\" must be followed by the name of an info command.\n");
help_list (maintenanceinfolist, "maintenance info ", -1, gdb_stdout);
}
static void
print_section_table (abfd, asect, ignore)
bfd *abfd;
asection *asect;
PTR ignore;
{
flagword flags;
flags = bfd_get_section_flags (abfd, asect);
/* FIXME-32x64: Need print_address_numeric with field width. */
printf_filtered (" %s",
local_hex_string_custom
((unsigned long) bfd_section_vma (abfd, asect), "08l"));
printf_filtered ("->%s",
local_hex_string_custom
((unsigned long) (bfd_section_vma (abfd, asect)
+ bfd_section_size (abfd, asect)),
"08l"));
printf_filtered (" at %s",
local_hex_string_custom
((unsigned long) asect->filepos, "08l"));
printf_filtered (": %s", bfd_section_name (abfd, asect));
if (flags & SEC_ALLOC)
printf_filtered (" ALLOC");
if (flags & SEC_LOAD)
printf_filtered (" LOAD");
if (flags & SEC_RELOC)
printf_filtered (" RELOC");
if (flags & SEC_READONLY)
printf_filtered (" READONLY");
if (flags & SEC_CODE)
printf_filtered (" CODE");
if (flags & SEC_DATA)
printf_filtered (" DATA");
if (flags & SEC_ROM)
printf_filtered (" ROM");
if (flags & SEC_CONSTRUCTOR)
printf_filtered (" CONSTRUCTOR");
if (flags & SEC_HAS_CONTENTS)
printf_filtered (" HAS_CONTENTS");
if (flags & SEC_NEVER_LOAD)
printf_filtered (" NEVER_LOAD");
if (flags & SEC_COFF_SHARED_LIBRARY)
printf_filtered (" COFF_SHARED_LIBRARY");
if (flags & SEC_IS_COMMON)
printf_filtered (" IS_COMMON");
printf_filtered ("\n");
}
/* ARGSUSED */
static void
maintenance_info_sections (arg, from_tty)
char *arg;
int from_tty;
{
if (exec_bfd)
{
printf_filtered ("Exec file:\n");
printf_filtered (" `%s', ", bfd_get_filename(exec_bfd));
wrap_here (" ");
printf_filtered ("file type %s.\n", bfd_get_target(exec_bfd));
bfd_map_over_sections(exec_bfd, print_section_table, 0);
}
if (core_bfd)
{
printf_filtered ("Core file:\n");
printf_filtered (" `%s', ", bfd_get_filename(core_bfd));
wrap_here (" ");
printf_filtered ("file type %s.\n", bfd_get_target(core_bfd));
bfd_map_over_sections(core_bfd, print_section_table, 0);
}
}
/* ARGSUSED */
void
maintenance_print_statistics (args, from_tty)
char *args;
int from_tty;
{
print_objfile_statistics ();
print_symbol_bcache_statistics ();
}
/* The "maintenance print" command is defined as a prefix, with allow_unknown
0. Therefore, its own definition is called only for "maintenance print"
with no args. */
/* ARGSUSED */
static void
maintenance_print_command (arg, from_tty)
char *arg;
int from_tty;
{
printf_unfiltered ("\"maintenance print\" must be followed by the name of a print command.\n");
help_list (maintenanceprintlist, "maintenance print ", -1, gdb_stdout);
}
/* The "maintenance translate-address" command converts a section and address
to a symbol. This can be called in two ways:
maintenance translate-address <secname> <addr>
or maintenance translate-address <addr>
*/
static void
maintenance_translate_address (arg, from_tty)
char *arg;
int from_tty;
{
CORE_ADDR address;
asection *sect;
char *p;
struct minimal_symbol *sym;
struct objfile *objfile;
if (arg == NULL || *arg == 0)
error ("requires argument (address or section + address)");
sect = NULL;
p = arg;
if (!isdigit (*p))
{ /* See if we have a valid section name */
while (*p && !isspace (*p)) /* Find end of section name */
p++;
if (*p == '\000') /* End of command? */
error ("Need to specify <section-name> and <address>");
*p++ = '\000';
while (isspace (*p)) p++; /* Skip whitespace */
ALL_OBJFILES (objfile)
if (sect = bfd_get_section_by_name (objfile->obfd, arg))
break;
if (!sect)
error ("Unknown section %s.", arg);
}
address = parse_and_eval_address (p);
if (sect)
sym = lookup_minimal_symbol_by_pc_section (address, sect);
else
sym = lookup_minimal_symbol_by_pc (address);
if (sym)
printf_filtered ("%s+%u\n",
SYMBOL_SOURCE_NAME (sym),
address - SYMBOL_VALUE_ADDRESS (sym));
else if (sect)
printf_filtered ("no symbol at %s:0x%08x\n", sect->name, address);
else
printf_filtered ("no symbol at 0x%08x\n", address);
return;
}
#endif /* MAINTENANCE_CMDS */
void
_initialize_maint_cmds ()
{
#if MAINTENANCE_CMDS /* Entire file goes away if not including maint cmds */
add_prefix_cmd ("maintenance", class_maintenance, maintenance_command,
"Commands for use by GDB maintainers.\n\
Includes commands to dump specific internal GDB structures in\n\
a human readable form, to cause GDB to deliberately dump core,\n\
to test internal functions such as the C++ demangler, etc.",
&maintenancelist, "maintenance ", 0,
&cmdlist);
add_com_alias ("mt", "maintenance", class_maintenance, 1);
add_prefix_cmd ("info", class_maintenance, maintenance_info_command,
"Commands for showing internal info about the program being debugged.",
&maintenanceinfolist, "maintenance info ", 0,
&maintenancelist);
add_cmd ("sections", class_maintenance, maintenance_info_sections,
"List the BFD sections of the exec and core files.",
&maintenanceinfolist);
add_prefix_cmd ("print", class_maintenance, maintenance_print_command,
"Maintenance command for printing GDB internal state.",
&maintenanceprintlist, "maintenance print ", 0,
&maintenancelist);
#ifndef _WIN32
add_cmd ("dump-me", class_maintenance, maintenance_dump_me,
"Get fatal error; make debugger dump its core.\n\
GDB sets it's handling of SIGQUIT back to SIG_DFL and then sends\n\
itself a SIGQUIT signal.",
&maintenancelist);
#endif
add_cmd ("demangle", class_maintenance, maintenance_demangle,
"Demangle a C++ mangled name.\n\
Call internal GDB demangler routine to demangle a C++ link name\n\
and prints the result.",
&maintenancelist);
add_cmd ("time", class_maintenance, maintenance_time_display,
"Set the display of time usage.\n\
If nonzero, will cause the execution time for each command to be\n\
displayed, following the command's output.",
&maintenancelist);
add_cmd ("space", class_maintenance, maintenance_space_display,
"Set the display of space usage.\n\
If nonzero, will cause the execution space for each command to be\n\
displayed, following the command's output.",
&maintenancelist);
add_cmd ("type", class_maintenance, maintenance_print_type,
"Print a type chain for a given symbol.\n\
For each node in a type chain, print the raw data for each member of\n\
the type structure, and the interpretation of the data.",
&maintenanceprintlist);
add_cmd ("symbols", class_maintenance, maintenance_print_symbols,
"Print dump of current symbol definitions.\n\
Entries in the full symbol table are dumped to file OUTFILE.\n\
If a SOURCE file is specified, dump only that file's symbols.",
&maintenanceprintlist);
add_cmd ("msymbols", class_maintenance, maintenance_print_msymbols,
"Print dump of current minimal symbol definitions.\n\
Entries in the minimal symbol table are dumped to file OUTFILE.\n\
If a SOURCE file is specified, dump only that file's minimal symbols.",
&maintenanceprintlist);
add_cmd ("psymbols", class_maintenance, maintenance_print_psymbols,
"Print dump of current partial symbol definitions.\n\
Entries in the partial symbol table are dumped to file OUTFILE.\n\
If a SOURCE file is specified, dump only that file's partial symbols.",
&maintenanceprintlist);
add_cmd ("objfiles", class_maintenance, maintenance_print_objfiles,
"Print dump of current object file definitions.",
&maintenanceprintlist);
add_cmd ("statistics", class_maintenance, maintenance_print_statistics,
"Print statistics about internal gdb state.",
&maintenanceprintlist);
add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
"Check consistency of psymtabs and symtabs.",
&maintenancelist);
add_cmd ("translate-address", class_maintenance, maintenance_translate_address,
"Translate a section name and address to a symbol.",
&maintenancelist);
add_show_from_set (
add_set_cmd ("watchdog", class_maintenance, var_zinteger, (char *)&watchdog,
"Set watchdog timer.\n\
When non-zero, this timeout is used instead of waiting forever for a target to\n\
finish a low-level step or continue operation. If the specified amount of time\n\
passes without a response from the target, an error occurs.", &setlist),
&showlist);
#endif /* MAINTENANCE_CMDS */
}
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