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2002-01-03 Michael Snyder <msnyder@redhat.com>

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Implement a "generate-core-file" command in gdb, save target state.
	* gcore.c: New file.  Implement new command 'generate-core-file'.
	Save a corefile image of the current state of the inferior.
	* linux-proc.c: Add linux-specific code for saving corefiles.
	* target.h (struct target_ops): Add new target vectors for saving
	corefiles; to_find_memory_regions and to_make_corefile_notes.
	(target_find_memory_regions): New macro.
	(target_make_corefile_notes): New macro.
	* target.c (update_current_target): Inherit new target methods.
	(dummy_find_memory_regions): New place-holder method.
	(dummy_make_corefile_notes): New place-holder method.
	(init_dummy_target): Initialize new dummy target vectors.
	* exec.c (exec_set_find_memory_regions): New function.
	Allow the exec_ops vector for memory regions to be taken over.
	(exec_make_note_section): New function, target vector method.
	* defs.h (exec_set_find_memory_regions): Export prototype.
	* procfs.c (proc_find_memory_regions): New function, corefile method.
	(procfs_make_note_section): New function, corefile method.
	(init_procfs_ops): Set new target vector pointers.
	(find_memory_regions_callback): New function.
	(procfs_do_thread_registers): New function.
	(procfs_corefile_thread_callback): New function.
	* sol-thread.c (sol_find_memory_regions): New function.
	(sol_make_note_section): New function.
	(init_sol_thread_ops): Initialize new target vectors.
	* inftarg.c (inftarg_set_find_memory_regions): New function.
	Allow to_find_memory_regions vector to be taken over.
	(inftarg_set_make_corefile_notes): New function.
	Allow to_make_corefile_notes vector to be taken over.
	* thread-db.c (thread_db_new_objfile): Don't activate thread-db
	interface layer if not target_has_execution (may be a corefile).
	* config/i386/linux.mh: Add gcore.o to NATDEPFILES.
	* config/sparc/sun4sol2.mh: Ditto.
	* config/alpha/alpha-linux.mh: Ditto.
	* config/arm/linux.mh: Ditto.
	* config/i386/x86-64linux.mh: Ditto.
	* config/ia64/linux.mh: Ditto.
	* config/m68k/linux.mh: Ditto.
	* config/mips/linux.mh: Ditto.
	* config/powerpc/linux.mh: Ditto.
	* config/sparc/linux.mh: Ditto.
This commit is contained in:
Michael Snyder
2002-01-09 00:37:02 +00:00
parent 30070dac97
commit be4d133316
20 changed files with 1145 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

249
gdb/procfs.c
View File

@@ -1,5 +1,5 @@
/* Machine independent support for SVR4 /proc (process file system) for GDB.
Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Written by Michael Snyder at Cygnus Solutions.
Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
@@ -127,52 +127,62 @@ static int procfs_thread_alive (ptid_t);
void procfs_find_new_threads (void);
char *procfs_pid_to_str (ptid_t);
static int proc_find_memory_regions (int (*) (CORE_ADDR,
unsigned long,
int, int, int,
void *),
void *);
static char * procfs_make_note_section (bfd *, int *);
struct target_ops procfs_ops; /* the target vector */
static void
init_procfs_ops (void)
{
procfs_ops.to_shortname = "procfs";
procfs_ops.to_longname = "Unix /proc child process";
procfs_ops.to_doc =
procfs_ops.to_shortname = "procfs";
procfs_ops.to_longname = "Unix /proc child process";
procfs_ops.to_doc =
"Unix /proc child process (started by the \"run\" command).";
procfs_ops.to_open = procfs_open;
procfs_ops.to_can_run = procfs_can_run;
procfs_ops.to_create_inferior = procfs_create_inferior;
procfs_ops.to_kill = procfs_kill_inferior;
procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
procfs_ops.to_attach = procfs_attach;
procfs_ops.to_detach = procfs_detach;
procfs_ops.to_wait = procfs_wait;
procfs_ops.to_resume = procfs_resume;
procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
procfs_ops.to_fetch_registers = procfs_fetch_registers;
procfs_ops.to_store_registers = procfs_store_registers;
procfs_ops.to_xfer_memory = procfs_xfer_memory;
procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
procfs_ops.to_notice_signals = procfs_notice_signals;
procfs_ops.to_files_info = procfs_files_info;
procfs_ops.to_stop = procfs_stop;
procfs_ops.to_open = procfs_open;
procfs_ops.to_can_run = procfs_can_run;
procfs_ops.to_create_inferior = procfs_create_inferior;
procfs_ops.to_kill = procfs_kill_inferior;
procfs_ops.to_mourn_inferior = procfs_mourn_inferior;
procfs_ops.to_attach = procfs_attach;
procfs_ops.to_detach = procfs_detach;
procfs_ops.to_wait = procfs_wait;
procfs_ops.to_resume = procfs_resume;
procfs_ops.to_prepare_to_store = procfs_prepare_to_store;
procfs_ops.to_fetch_registers = procfs_fetch_registers;
procfs_ops.to_store_registers = procfs_store_registers;
procfs_ops.to_xfer_memory = procfs_xfer_memory;
procfs_ops.to_insert_breakpoint = memory_insert_breakpoint;
procfs_ops.to_remove_breakpoint = memory_remove_breakpoint;
procfs_ops.to_notice_signals = procfs_notice_signals;
procfs_ops.to_files_info = procfs_files_info;
procfs_ops.to_stop = procfs_stop;
procfs_ops.to_terminal_init = terminal_init_inferior;
procfs_ops.to_terminal_inferior = terminal_inferior;
procfs_ops.to_terminal_init = terminal_init_inferior;
procfs_ops.to_terminal_inferior = terminal_inferior;
procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output;
procfs_ops.to_terminal_ours = terminal_ours;
procfs_ops.to_terminal_info = child_terminal_info;
procfs_ops.to_terminal_ours = terminal_ours;
procfs_ops.to_terminal_info = child_terminal_info;
procfs_ops.to_find_new_threads = procfs_find_new_threads;
procfs_ops.to_thread_alive = procfs_thread_alive;
procfs_ops.to_pid_to_str = procfs_pid_to_str;
procfs_ops.to_find_new_threads = procfs_find_new_threads;
procfs_ops.to_thread_alive = procfs_thread_alive;
procfs_ops.to_pid_to_str = procfs_pid_to_str;
procfs_ops.to_has_all_memory = 1;
procfs_ops.to_has_memory = 1;
procfs_ops.to_has_execution = 1;
procfs_ops.to_has_stack = 1;
procfs_ops.to_has_registers = 1;
procfs_ops.to_stratum = process_stratum;
procfs_ops.to_has_thread_control = tc_schedlock;
procfs_ops.to_magic = OPS_MAGIC;
procfs_ops.to_has_all_memory = 1;
procfs_ops.to_has_memory = 1;
procfs_ops.to_has_execution = 1;
procfs_ops.to_has_stack = 1;
procfs_ops.to_has_registers = 1;
procfs_ops.to_stratum = process_stratum;
procfs_ops.to_has_thread_control = tc_schedlock;
procfs_ops.to_find_memory_regions = proc_find_memory_regions;
procfs_ops.to_make_corefile_notes = procfs_make_note_section;
procfs_ops.to_magic = OPS_MAGIC;
}
/* =================== END, TARGET_OPS "MODULE" =================== */
@@ -5354,6 +5364,65 @@ proc_iterate_over_mappings (int (*func) (int, CORE_ADDR))
return iterate_over_mappings (pi, func, pi, solib_mappings_callback);
}
/*
* Function: find_memory_regions_callback
*
* Implements the to_find_memory_regions method.
* Calls an external function for each memory region.
* External function will have the signiture:
*
* int callback (CORE_ADDR vaddr,
* unsigned long size,
* int read, int write, int execute,
* void *data);
*
* Returns the integer value returned by the callback.
*/
static int
find_memory_regions_callback (struct prmap *map,
int (*func) (CORE_ADDR,
unsigned long,
int, int, int,
void *),
void *data)
{
return (*func) (host_pointer_to_address ((void *) map->pr_vaddr),
map->pr_size,
(map->pr_mflags & MA_READ) != 0,
(map->pr_mflags & MA_WRITE) != 0,
(map->pr_mflags & MA_EXEC) != 0,
data);
}
/*
* Function: proc_find_memory_regions
*
* External interface. Calls a callback function once for each
* mapped memory region in the child process, passing as arguments
* CORE_ADDR virtual_address,
* unsigned long size,
* int read, TRUE if region is readable by the child
* int write, TRUE if region is writable by the child
* int execute TRUE if region is executable by the child.
*
* Stops iterating and returns the first non-zero value
* returned by the callback.
*/
static int
proc_find_memory_regions (int (*func) (CORE_ADDR,
unsigned long,
int, int, int,
void *),
void *data)
{
procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
return iterate_over_mappings (pi, func, data,
find_memory_regions_callback);
}
/*
* Function: mappingflags
*
@@ -5650,3 +5719,109 @@ procfs_first_available (void)
{
return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1);
}
/* =================== GCORE .NOTE "MODULE" =================== */
static char *
procfs_do_thread_registers (bfd *obfd, ptid_t ptid,
char *note_data, int *note_size)
{
gdb_gregset_t gregs;
gdb_fpregset_t fpregs;
unsigned long merged_pid;
merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid);
fill_gregset (&gregs, -1);
note_data = (char *) elfcore_write_prstatus (obfd,
note_data,
note_size,
merged_pid,
stop_signal,
&gregs);
fill_fpregset (&fpregs, -1);
note_data = (char *) elfcore_write_prfpreg (obfd,
note_data,
note_size,
&fpregs,
sizeof (fpregs));
return note_data;
}
struct procfs_corefile_thread_data {
bfd *obfd;
char *note_data;
int *note_size;
};
static int
procfs_corefile_thread_callback (struct thread_info *ti, void *data)
{
struct procfs_corefile_thread_data *args = data;
procinfo *pi = find_procinfo (PIDGET (ti->ptid), TIDGET (ti->ptid));
if (pi != NULL && TIDGET (ti->ptid) != 0)
{
ptid_t saved_ptid = inferior_ptid;
inferior_ptid = ti->ptid;
args->note_data = procfs_do_thread_registers (args->obfd, ti->ptid,
args->note_data,
args->note_size);
inferior_ptid = saved_ptid;
}
return 0;
}
static char *
procfs_make_note_section (bfd *obfd, int *note_size)
{
struct cleanup *old_chain;
gdb_gregset_t gregs;
gdb_fpregset_t fpregs;
char fname[16] = {'\0'};
char psargs[80] = {'\0'};
procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0);
char *note_data = NULL;
struct procfs_corefile_thread_data thread_args;
if (get_exec_file (0))
{
strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname));
strncpy (psargs, get_exec_file (0),
sizeof (psargs));
if (get_inferior_args ())
{
strncat (psargs, " ",
sizeof (psargs) - strlen (psargs));
strncat (psargs, get_inferior_args (),
sizeof (psargs) - strlen (psargs));
}
}
note_data = (char *) elfcore_write_prpsinfo (obfd,
note_data,
note_size,
fname,
psargs);
thread_args.obfd = obfd;
thread_args.note_data = note_data;
thread_args.note_size = note_size;
iterate_over_threads (procfs_corefile_thread_callback, &thread_args);
if (thread_args.note_data == note_data)
{
/* iterate_over_threads didn't come up with any threads;
just use inferior_ptid. */
note_data = procfs_do_thread_registers (obfd, inferior_ptid,
note_data, note_size);
}
else
{
note_data = thread_args.note_data;
}
make_cleanup (xfree, note_data);
return note_data;
}
/* =================== END GCORE .NOTE "MODULE" =================== */