994 lines
24 KiB
C
994 lines
24 KiB
C
/* Low level interface for debugging FreeBSD user threads for GDB, the GNU debugger.
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Copyright 1996, 1999 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* $FreeBSD$ */
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/* This module implements a sort of half target that sits between the
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machine-independent parts of GDB and the ptrace interface (infptrace.c) to
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provide access to the FreeBSD user-mode thread implementation.
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FreeBSD threads are true user-mode threads, which are invoked via
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the pthread_* interfaces. These are mostly implemented in
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user-space, with all thread context kept in various structures that
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live in the user's heap. For the most part, the kernel has no
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knowlege of these threads.
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Based largely on hpux-thread.c
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*/
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#include "defs.h"
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#include <sys/queue.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <string.h>
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#include "gdbthread.h"
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#include "target.h"
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#include "inferior.h"
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#include <fcntl.h>
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#include <ucontext.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "gdbcore.h"
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#include "regcache.h"
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extern int child_suppress_run;
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extern struct target_ops child_ops; /* target vector for inftarg.c */
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extern void _initialize_freebsd_uthread PARAMS ((void));
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/* Set to true while we are part-way through attaching */
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static int freebsd_uthread_attaching;
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static int freebsd_uthread_active = 0;
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static CORE_ADDR P_thread_list;
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static CORE_ADDR P_thread_run;
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/* Pointer to the next function on the objfile event chain. */
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static void (*target_new_objfile_chain) (struct objfile *objfile);
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static void freebsd_uthread_resume PARAMS ((ptid_t pid, int step,
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enum target_signal signo));
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static void init_freebsd_uthread_ops PARAMS ((void));
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static struct target_ops freebsd_uthread_ops;
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static ptid_t find_active_ptid PARAMS ((void));
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struct cached_pthread {
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u_int64_t uniqueid;
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int state;
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CORE_ADDR name;
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union {
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ucontext_t uc;
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jmp_buf jb;
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} ctx;
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};
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static ptid_t cached_ptid;
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static struct cached_pthread cached_pthread;
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static CORE_ADDR cached_pthread_addr;
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LIST_HEAD(idmaplist, idmap);
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struct idmap {
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LIST_ENTRY(idmap) link;
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u_int64_t uniqueid;
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int tid;
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};
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#define MAPHASH_SIZE 257
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#define TID_MIN 1
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#define TID_MAX 16383
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static int tid_to_hash[TID_MAX + 1]; /* set to map_hash index */
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static struct idmaplist map_hash[MAPHASH_SIZE];
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static int next_free_tid = TID_MIN; /* first available tid */
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static int last_free_tid = TID_MIN; /* first unavailable */
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static CORE_ADDR P_thread_next_offset;
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static CORE_ADDR P_thread_uniqueid_offset;
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static CORE_ADDR P_thread_state_offset;
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static CORE_ADDR P_thread_name_offset;
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static CORE_ADDR P_thread_ctx_offset;
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static CORE_ADDR P_thread_PS_RUNNING_value;
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static CORE_ADDR P_thread_PS_DEAD_value;
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static int next_offset;
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static int uniqueid_offset;
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static int state_offset;
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static int name_offset;
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static int ctx_offset;
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static int PS_RUNNING_value;
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static int PS_DEAD_value;
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#define UNIQUEID_HASH(id) (id % MAPHASH_SIZE)
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#define TID_ADD1(tid) (((tid) + 1) == TID_MAX + 1 \
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? TID_MIN : (tid) + 1)
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#define IS_TID_FREE(tid) (tid_to_hash[tid] == -1)
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static int
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get_new_tid(int h)
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{
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int tid = next_free_tid;
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tid_to_hash[tid] = h;
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next_free_tid = TID_ADD1(next_free_tid);
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if (next_free_tid == last_free_tid)
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{
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int i;
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for (i = last_free_tid; TID_ADD1(i) != last_free_tid; i = TID_ADD1(i))
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if (IS_TID_FREE(i))
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break;
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if (TID_ADD1(i) == last_free_tid)
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{
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error("too many threads");
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return 0;
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}
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next_free_tid = i;
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for (i = TID_ADD1(i); IS_TID_FREE(i); i = TID_ADD1(i))
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;
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last_free_tid = i;
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}
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return tid;
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}
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static ptid_t
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find_ptid(u_int64_t uniqueid)
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{
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int h = UNIQUEID_HASH(uniqueid);
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struct idmap *im;
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LIST_FOREACH(im, &map_hash[h], link)
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if (im->uniqueid == uniqueid)
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return MERGEPID(PIDGET(inferior_ptid), im->tid);
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im = xmalloc(sizeof(struct idmap));
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im->uniqueid = uniqueid;
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im->tid = get_new_tid(h);
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LIST_INSERT_HEAD(&map_hash[h], im, link);
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return MERGEPID(PIDGET(inferior_ptid), im->tid);
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}
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static void
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free_ptid(ptid_t ptid)
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{
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int tid = TIDGET(ptid);
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int h = tid_to_hash[tid];
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struct idmap *im;
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if (!tid) return;
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LIST_FOREACH(im, &map_hash[h], link)
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if (im->tid == tid)
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break;
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if (!im) return;
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LIST_REMOVE(im, link);
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tid_to_hash[tid] = -1;
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free(im);
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}
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#define READ_OFFSET(field) read_memory(P_thread_##field##_offset, \
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(char *) &field##_offset, \
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sizeof(field##_offset))
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#define READ_VALUE(name) read_memory(P_thread_##name##_value, \
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(char *) &name##_value, \
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sizeof(name##_value))
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static void
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read_thread_offsets (void)
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{
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READ_OFFSET(next);
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READ_OFFSET(uniqueid);
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READ_OFFSET(state);
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READ_OFFSET(name);
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READ_OFFSET(ctx);
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READ_VALUE(PS_RUNNING);
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READ_VALUE(PS_DEAD);
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}
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#define READ_FIELD(ptr, T, field, result) \
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read_memory ((ptr) + field##_offset, (char *) &(result), sizeof result)
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static u_int64_t
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read_pthread_uniqueid (CORE_ADDR ptr)
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{
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u_int64_t uniqueid;
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READ_FIELD(ptr, u_int64_t, uniqueid, uniqueid);
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return uniqueid;
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}
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static CORE_ADDR
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read_pthread_next (CORE_ADDR ptr)
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{
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CORE_ADDR next;
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READ_FIELD(ptr, CORE_ADDR, next, next);
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return next;
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}
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static void
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read_cached_pthread (CORE_ADDR ptr, struct cached_pthread *cache)
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{
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READ_FIELD(ptr, u_int64_t, uniqueid, cache->uniqueid);
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READ_FIELD(ptr, int, state, cache->state);
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READ_FIELD(ptr, CORE_ADDR, name, cache->name);
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READ_FIELD(ptr, ucontext_t, ctx, cache->ctx);
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}
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static ptid_t
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find_active_ptid (void)
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{
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CORE_ADDR ptr;
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read_memory ((CORE_ADDR)P_thread_run,
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(char *)&ptr,
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sizeof ptr);
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return find_ptid(read_pthread_uniqueid(ptr));
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}
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static CORE_ADDR find_pthread_addr PARAMS ((ptid_t ptid));
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static struct cached_pthread * find_pthread PARAMS ((ptid_t ptid));
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static CORE_ADDR
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find_pthread_addr (ptid_t ptid)
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{
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CORE_ADDR ptr;
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if (ptid_equal(ptid, cached_ptid))
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return cached_pthread_addr;
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read_memory ((CORE_ADDR)P_thread_list,
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(char *)&ptr,
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sizeof ptr);
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while (ptr != 0)
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{
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if (ptid_equal(find_ptid(read_pthread_uniqueid(ptr)), ptid))
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{
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cached_ptid = ptid;
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cached_pthread_addr = ptr;
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read_cached_pthread(ptr, &cached_pthread);
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return ptr;
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}
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ptr = read_pthread_next(ptr);
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}
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return NULL;
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}
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static struct cached_pthread *
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find_pthread (ptid_t ptid)
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{
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CORE_ADDR ptr;
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if (ptid_equal(ptid, cached_ptid))
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return &cached_pthread;
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read_memory ((CORE_ADDR)P_thread_list,
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(char *)&ptr,
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sizeof ptr);
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while (ptr != 0)
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{
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if (ptid_equal(find_ptid(read_pthread_uniqueid(ptr)), ptid))
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{
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cached_ptid = ptid;
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cached_pthread_addr = ptr;
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read_cached_pthread(ptr, &cached_pthread);
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return &cached_pthread;
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}
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ptr = read_pthread_next(ptr);
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}
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#if 0
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error ("Can't find pthread %d,%d", PIDGET(ptid), TIDGET(ptid));
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#endif
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return NULL;
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}
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/* Most target vector functions from here on actually just pass through to
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inftarg.c, as they don't need to do anything specific for threads. */
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/* ARGSUSED */
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static void
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freebsd_uthread_open (char *arg, int from_tty)
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{
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child_ops.to_open (arg, from_tty);
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}
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/* Attach to process PID, then initialize for debugging it
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and wait for the trace-trap that results from attaching. */
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static void
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freebsd_uthread_attach (char *args, int from_tty)
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{
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child_ops.to_attach (args, from_tty);
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push_target (&freebsd_uthread_ops);
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freebsd_uthread_attaching = 1;
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}
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/* After an attach, see if the target is threaded */
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static void
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freebsd_uthread_post_attach (int pid)
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{
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if (freebsd_uthread_active)
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{
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read_thread_offsets ();
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inferior_ptid = find_active_ptid ();
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add_thread (inferior_ptid);
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}
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else
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{
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unpush_target (&freebsd_uthread_ops);
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push_target (&child_ops);
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}
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freebsd_uthread_attaching = 0;
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}
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/* Take a program previously attached to and detaches it.
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The program resumes execution and will no longer stop
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on signals, etc. We'd better not have left any breakpoints
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in the program or it'll die when it hits one. For this
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to work, it may be necessary for the process to have been
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previously attached. It *might* work if the program was
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started via the normal ptrace (PTRACE_TRACEME). */
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static void
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freebsd_uthread_detach (char *args, int from_tty)
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{
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child_ops.to_detach (args, from_tty);
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}
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/* Resume execution of process PID. If STEP is nozero, then
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just single step it. If SIGNAL is nonzero, restart it with that
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signal activated. We may have to convert pid from a thread-id to an LWP id
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for procfs. */
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static void
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freebsd_uthread_resume (ptid_t ptid, int step, enum target_signal signo)
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{
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if (freebsd_uthread_attaching)
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{
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child_ops.to_resume (ptid, step, signo);
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return;
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}
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child_ops.to_resume (ptid, step, signo);
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cached_ptid = MERGEPID(0, 0);
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}
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/* Wait for any threads to stop. We may have to convert PID from a thread id
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to a LWP id, and vice versa on the way out. */
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static ptid_t
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freebsd_uthread_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
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{
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ptid_t rtnval;
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if (freebsd_uthread_attaching)
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{
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return child_ops.to_wait (ptid, ourstatus);
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}
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rtnval = child_ops.to_wait (ptid, ourstatus);
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if (PIDGET(rtnval) >= 0)
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{
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rtnval = find_active_ptid ();
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if (!in_thread_list (rtnval))
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add_thread (rtnval);
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}
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return rtnval;
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}
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/* XXX: this needs to be selected by target, not [build] host */
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#ifdef __i386__
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#include "i386-tdep.h"
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static char sigmap[I386_SSE_NUM_REGS] = /* map reg to sigcontext */
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{
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12, /* eax */
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11, /* ecx */
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10, /* edx */
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9, /* ebx */
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8, /* esp */
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7, /* ebp */
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6, /* esi */
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5, /* edi */
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15, /* eip */
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17, /* eflags */
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16, /* cs */
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19, /* ss */
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4, /* ds */
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3, /* es */
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2, /* fs */
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1, /* gs */
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-1, -1, -1, -1, -1, -1, -1, /* st0-st7 */
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-1, -1, -1, -1, -1, -1, -1, /* fctrl-fop */
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-1, -1, -1, -1, -1, -1, -1, /* xmm0-xmm7 */
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-1, /* mxcsr */
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};
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static char jmpmap[I386_SSE_NUM_REGS] = /* map reg to jmp_buf */
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{
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6, /* eax */
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-1, /* ecx */
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-1, /* edx */
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1, /* ebx */
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2, /* esp */
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3, /* ebp */
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4, /* esi */
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5, /* edi */
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0, /* eip */
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-1, /* eflags */
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-1, /* cs */
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-1, /* ss */
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-1, /* ds */
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-1, /* es */
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-1, /* fs */
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-1, /* gs */
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-1, -1, -1, -1, -1, -1, -1, /* st0-st7 */
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-1, -1, -1, -1, -1, -1, -1, /* fctrl-fop */
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-1, -1, -1, -1, -1, -1, -1, /* xmm0-xmm7 */
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-1, /* mxcsr */
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};
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#endif
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#ifdef __amd64__
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#include "amd64-tdep.h"
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// XXX:DEO not fully ported from i386 yet!!
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static char sigmap[AMD64_NUM_REGS_TOTAL] = /* map reg to sigcontext */
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{
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12, /* rax */
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11, /* rcx */
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10, /* rdx */
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9, /* rbx */
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8, /* rsp */
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7, /* rbp */
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6, /* rsi */
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5, /* rdi */
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15, /* rip */
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17, /* rflags */
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16, /* cs */
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19, /* ss */
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4, /* ds */
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3, /* es */
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2, /* fs */
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1, /* gs */
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-1, -1, -1, -1, -1, -1, -1, /* st0-st7 */
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-1, -1, -1, -1, -1, -1, -1, /* fctrl-fop */
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-1, -1, -1, -1, -1, -1, -1, /* xmm0-xmm7 */
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-1, /* mxcsr */
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};
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static char jmpmap[AMD64_NUM_REGS_TOTAL] = /* map reg to jmp_buf */
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{
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6, /* rax */
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-1, /* rcx */
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-1, /* rdx */
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1, /* rbx */
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2, /* rsp */
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3, /* rbp */
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4, /* rsi */
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5, /* rdi */
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0, /* rip */
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-1, /* rflags */
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-1, /* cs */
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-1, /* ss */
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-1, /* ds */
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-1, /* es */
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-1, /* fs */
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-1, /* gs */
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-1, -1, -1, -1, -1, -1, -1, /* st0-st7 */
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-1, -1, -1, -1, -1, -1, -1, /* fctrl-fop */
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-1, -1, -1, -1, -1, -1, -1, /* xmm0-xmm7 */
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-1, /* mxcsr */
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};
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#endif
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#ifdef __alpha__
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#include "alpha-tdep.h"
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static char sigmap[ALPHA_NUM_REGS] = /* map reg to sigcontext */
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{
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1, 2, 3, 4, 5, 6, 7, 8, /* v0 - t6 */
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9, 10, 11, 12, 13, 14, 15, 16, /* t7 - fp */
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17, 18, 19, 20, 21, 22, 23, 24, /* a0 - t9 */
|
||
25, 26, 27, 28, 29, 30, 31, 32, /* t10 - zero */
|
||
38, 39, 40, 41, 42, 43, 44, 45, /* f0 - f7 */
|
||
46, 47, 48, 49, 50, 51, 52, 53, /* f8 - f15 */
|
||
54, 55, 56, 57, 58, 59, 60, 61, /* f16 - f23 */
|
||
62, 63, 64, 65, 66, 67, 68, 69, /* f24 - f31 */
|
||
33, -1 /* pc, vfp */
|
||
};
|
||
static char jmpmap[ALPHA_NUM_REGS] = {
|
||
4, 5, 6, 7, 8, 9, 10, 11, /* v0 - t6 */
|
||
12, 13, 14, 15, 16, 17, 18, 19, /* t7 - fp */
|
||
20, 21, 22, 23, 24, 25, 26, 27, /* a0 - t9 */
|
||
28, 29, 30, 31, 32, 33, 34, 35, /* t10 - zero */
|
||
37, 38, 39, 40, 41, 42, 43, 44, /* f0 - f7 */
|
||
45, 46, 47, 48, 49, 50, 51, 52, /* f8 - f15 */
|
||
53, 54, 55, 56, 57, 58, 59, 60, /* f16 - f23 */
|
||
61, 62, 63, 64, 65, 66, 67, 68, /* f24 - f31 */
|
||
2, -1, /* pc, vfp */
|
||
};
|
||
|
||
#endif
|
||
|
||
#ifdef __sparc64__
|
||
|
||
static char sigmap[125] = /* map reg to sigcontext */
|
||
{
|
||
-1
|
||
};
|
||
static char jmpmap[125] = {
|
||
-1
|
||
};
|
||
|
||
#endif
|
||
|
||
static void
|
||
freebsd_uthread_fetch_registers (int regno)
|
||
{
|
||
struct cached_pthread *thread;
|
||
int active;
|
||
int first_regno, last_regno;
|
||
register_t *regbase;
|
||
char *regmap;
|
||
|
||
if (freebsd_uthread_attaching || TIDGET(inferior_ptid) == 0)
|
||
{
|
||
child_ops.to_fetch_registers (regno);
|
||
return;
|
||
}
|
||
|
||
thread = find_pthread (inferior_ptid);
|
||
active = (ptid_equal(inferior_ptid, find_active_ptid()));
|
||
|
||
if (active)
|
||
{
|
||
child_ops.to_fetch_registers (regno);
|
||
return;
|
||
}
|
||
|
||
if (regno == -1)
|
||
{
|
||
first_regno = 0;
|
||
last_regno = NUM_REGS - 1;
|
||
}
|
||
else
|
||
{
|
||
first_regno = regno;
|
||
last_regno = regno;
|
||
}
|
||
|
||
regbase = (register_t*) &thread->ctx.jb[0];
|
||
regmap = jmpmap;
|
||
|
||
for (regno = first_regno; regno <= last_regno; regno++)
|
||
{
|
||
if (regmap[regno] == -1)
|
||
child_ops.to_fetch_registers (regno);
|
||
else
|
||
if (thread)
|
||
regcache_raw_supply (current_regcache, regno, (char*) ®base[regmap[regno]]);
|
||
else
|
||
regcache_raw_supply (current_regcache, regno, NULL);
|
||
}
|
||
}
|
||
|
||
static void
|
||
freebsd_uthread_store_registers (int regno)
|
||
{
|
||
struct cached_pthread *thread;
|
||
CORE_ADDR ptr;
|
||
int first_regno, last_regno;
|
||
u_int32_t *regbase;
|
||
char *regmap;
|
||
|
||
if (freebsd_uthread_attaching)
|
||
{
|
||
child_ops.to_store_registers (regno);
|
||
return;
|
||
}
|
||
|
||
thread = find_pthread (inferior_ptid);
|
||
|
||
if (thread->state == PS_RUNNING_value)
|
||
{
|
||
child_ops.to_store_registers (regno);
|
||
return;
|
||
}
|
||
|
||
if (regno == -1)
|
||
{
|
||
first_regno = 0;
|
||
last_regno = NUM_REGS - 1;
|
||
}
|
||
else
|
||
{
|
||
first_regno = regno;
|
||
last_regno = regno;
|
||
}
|
||
|
||
regbase = (u_int32_t*) &thread->ctx.jb[0];
|
||
regmap = jmpmap;
|
||
|
||
ptr = find_pthread_addr (inferior_ptid);
|
||
for (regno = first_regno; regno <= last_regno; regno++)
|
||
{
|
||
if (regmap[regno] == -1)
|
||
child_ops.to_store_registers (regno);
|
||
else
|
||
{
|
||
u_int32_t *reg = ®base[regmap[regno]];
|
||
int off;
|
||
|
||
/* Hang onto cached value */
|
||
/*DEO:XXX*/
|
||
memcpy(reg, deprecated_registers /*regcache_collect ()*/+ DEPRECATED_REGISTER_BYTE (regno),
|
||
register_size (current_gdbarch, regno));
|
||
|
||
/* And push out to inferior */
|
||
off = (char *) reg - (char *) thread;
|
||
write_memory (ptr + off,
|
||
/*DEO:XXX*/
|
||
deprecated_registers /*regcache_collect ()*/+ DEPRECATED_REGISTER_BYTE (regno),
|
||
register_size (current_gdbarch, regno));
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Get ready to modify the registers array. On machines which store
|
||
individual registers, this doesn't need to do anything. On machines
|
||
which store all the registers in one fell swoop, this makes sure
|
||
that registers contains all the registers from the program being
|
||
debugged. */
|
||
|
||
static void
|
||
freebsd_uthread_prepare_to_store (void)
|
||
{
|
||
child_ops.to_prepare_to_store ();
|
||
}
|
||
|
||
static int
|
||
freebsd_uthread_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
|
||
int dowrite, struct mem_attrib *attrib,
|
||
struct target_ops *target)
|
||
{
|
||
return child_ops.to_xfer_memory (memaddr, myaddr, len, dowrite,
|
||
attrib, target);
|
||
}
|
||
|
||
/* Print status information about what we're accessing. */
|
||
|
||
static void
|
||
freebsd_uthread_files_info (struct target_ops *ignore)
|
||
{
|
||
child_ops.to_files_info (ignore);
|
||
}
|
||
|
||
static void
|
||
freebsd_uthread_kill_inferior (void)
|
||
{
|
||
child_ops.to_kill ();
|
||
}
|
||
|
||
static void
|
||
freebsd_uthread_notice_signals (ptid_t ptid)
|
||
{
|
||
child_ops.to_notice_signals (ptid);
|
||
}
|
||
|
||
/* Fork an inferior process, and start debugging it with /proc. */
|
||
|
||
static void
|
||
freebsd_uthread_create_inferior (char *exec_file, char *allargs, char **env,
|
||
int from_tty)
|
||
{
|
||
child_ops.to_create_inferior (exec_file, allargs, env, from_tty);
|
||
|
||
if (PIDGET(inferior_ptid) && freebsd_uthread_active)
|
||
{
|
||
read_thread_offsets ();
|
||
push_target (&freebsd_uthread_ops);
|
||
inferior_ptid = find_active_ptid ();
|
||
add_thread (inferior_ptid);
|
||
}
|
||
}
|
||
|
||
/* This routine is called to find out if the inferior is using threads.
|
||
We check for the _thread_run and _thread_list globals. */
|
||
|
||
void
|
||
freebsd_uthread_new_objfile (struct objfile *objfile)
|
||
{
|
||
struct minimal_symbol *ms;
|
||
|
||
if (!objfile)
|
||
{
|
||
freebsd_uthread_active = 0;
|
||
return;
|
||
}
|
||
|
||
ms = lookup_minimal_symbol ("_thread_run", NULL, objfile);
|
||
|
||
if (!ms)
|
||
return;
|
||
|
||
P_thread_run = SYMBOL_VALUE_ADDRESS (ms);
|
||
|
||
ms = lookup_minimal_symbol ("_thread_list", NULL, objfile);
|
||
|
||
if (!ms)
|
||
return;
|
||
|
||
P_thread_list = SYMBOL_VALUE_ADDRESS (ms);
|
||
|
||
#define OFFSET_SYM(field) "_thread_" #field "_offset"
|
||
#define LOOKUP_OFFSET(field) \
|
||
do { \
|
||
ms = lookup_minimal_symbol (OFFSET_SYM(field), NULL, objfile); \
|
||
if (!ms) \
|
||
return; \
|
||
P_thread_##field##_offset = SYMBOL_VALUE_ADDRESS (ms); \
|
||
} while (0);
|
||
|
||
#define VALUE_SYM(name) "_thread_" #name "_value"
|
||
#define LOOKUP_VALUE(name) \
|
||
do { \
|
||
ms = lookup_minimal_symbol (VALUE_SYM(name), NULL, objfile); \
|
||
if (!ms) \
|
||
return; \
|
||
P_thread_##name##_value = SYMBOL_VALUE_ADDRESS (ms); \
|
||
} while (0);
|
||
|
||
LOOKUP_OFFSET(next);
|
||
LOOKUP_OFFSET(uniqueid);
|
||
LOOKUP_OFFSET(state);
|
||
LOOKUP_OFFSET(name);
|
||
LOOKUP_OFFSET(ctx);
|
||
|
||
LOOKUP_VALUE(PS_RUNNING);
|
||
LOOKUP_VALUE(PS_DEAD);
|
||
|
||
freebsd_uthread_active = 1;
|
||
}
|
||
|
||
/* Clean up after the inferior dies. */
|
||
|
||
static void
|
||
freebsd_uthread_mourn_inferior ()
|
||
{
|
||
child_ops.to_mourn_inferior ();
|
||
unpush_target (&freebsd_uthread_ops);
|
||
}
|
||
|
||
/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
|
||
|
||
static int
|
||
freebsd_uthread_can_run ()
|
||
{
|
||
return child_suppress_run;
|
||
}
|
||
|
||
static int
|
||
freebsd_uthread_thread_alive (ptid_t ptid)
|
||
{
|
||
struct cached_pthread *thread;
|
||
int ret = 0;
|
||
|
||
if (freebsd_uthread_attaching)
|
||
return 1;
|
||
|
||
/*
|
||
* We can get called from child_ops.to_wait() which passes the underlying
|
||
* pid (without a thread number).
|
||
*/
|
||
if (TIDGET(ptid) == 0)
|
||
return 1;
|
||
|
||
if (find_pthread_addr (ptid) != 0)
|
||
{
|
||
thread = find_pthread (ptid);
|
||
ret = (thread->state != PS_DEAD_value);
|
||
}
|
||
|
||
if (!ret)
|
||
free_ptid(ptid);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static void
|
||
freebsd_uthread_stop (void)
|
||
{
|
||
child_ops.to_stop ();
|
||
}
|
||
|
||
static void
|
||
freebsd_uthread_find_new_threads (void)
|
||
{
|
||
CORE_ADDR ptr;
|
||
int state;
|
||
u_int64_t uniqueid;
|
||
|
||
read_memory ((CORE_ADDR)P_thread_list,
|
||
(char *)&ptr,
|
||
sizeof ptr);
|
||
|
||
while (ptr != 0)
|
||
{
|
||
READ_FIELD(ptr, int, state, state);
|
||
READ_FIELD(ptr, u_int64_t, uniqueid, uniqueid);
|
||
if (state != PS_DEAD_value &&
|
||
!in_thread_list (find_ptid(uniqueid)))
|
||
add_thread (find_ptid(uniqueid));
|
||
ptr = read_pthread_next(ptr);
|
||
}
|
||
}
|
||
|
||
/* MUST MATCH enum pthread_state */
|
||
static const char *statenames[] = {
|
||
"RUNNING",
|
||
"SIGTHREAD",
|
||
"MUTEX_WAIT",
|
||
"COND_WAIT",
|
||
"FDLR_WAIT",
|
||
"FDLW_WAIT",
|
||
"FDR_WAIT",
|
||
"FDW_WAIT",
|
||
"POLL_WAIT",
|
||
"FILE_WAIT",
|
||
"SELECT_WAIT",
|
||
"SLEEP_WAIT",
|
||
"WAIT_WAIT",
|
||
"SIGSUSPEND",
|
||
"SIGWAIT",
|
||
"SPINBLOCK",
|
||
"JOIN",
|
||
"SUSPENDED",
|
||
"DEAD",
|
||
"DEADLOCK",
|
||
};
|
||
|
||
#if 0
|
||
|
||
static int
|
||
freebsd_uthread_get_thread_info (ref, selection, info)
|
||
gdb_threadref *ref;
|
||
int selection;
|
||
struct gdb_ext_thread_info *info;
|
||
{
|
||
int pid = *ref;
|
||
struct cached_pthread *thread = find_pthread (pid);
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
inferior_pid = main_pid;
|
||
|
||
memset(&info->threadid, 0, OPAQUETHREADBYTES);
|
||
|
||
memcpy(&info->threadid, ref, sizeof *ref);
|
||
info->active = thread->state == PS_RUNNING_value;
|
||
strcpy(info->display, statenames[thread->state]);
|
||
if (thread->name)
|
||
read_memory ((CORE_ADDR) thread->name, info->shortname, 32);
|
||
else
|
||
strcpy(info->shortname, "");
|
||
|
||
do_cleanups (old_chain);
|
||
return (0);
|
||
}
|
||
|
||
#endif
|
||
|
||
char *
|
||
freebsd_uthread_pid_to_str (ptid_t ptid)
|
||
{
|
||
static char buf[30];
|
||
|
||
if (DEPRECATED_STREQ (current_target.to_shortname, "freebsd-uthreads"))
|
||
sprintf (buf, "Process %d, Thread %ld",
|
||
PIDGET(ptid), TIDGET(ptid));
|
||
else
|
||
sprintf (buf, "Process %d", PIDGET(ptid));
|
||
|
||
return buf;
|
||
}
|
||
|
||
|
||
static void
|
||
init_freebsd_uthread_ops ()
|
||
{
|
||
freebsd_uthread_ops.to_shortname = "freebsd-uthreads";
|
||
freebsd_uthread_ops.to_longname = "FreeBSD uthreads";
|
||
freebsd_uthread_ops.to_doc = "FreeBSD user threads support.";
|
||
freebsd_uthread_ops.to_open = freebsd_uthread_open;
|
||
freebsd_uthread_ops.to_attach = freebsd_uthread_attach;
|
||
freebsd_uthread_ops.to_post_attach = freebsd_uthread_post_attach;
|
||
freebsd_uthread_ops.to_detach = freebsd_uthread_detach;
|
||
freebsd_uthread_ops.to_resume = freebsd_uthread_resume;
|
||
freebsd_uthread_ops.to_wait = freebsd_uthread_wait;
|
||
freebsd_uthread_ops.to_fetch_registers = freebsd_uthread_fetch_registers;
|
||
freebsd_uthread_ops.to_store_registers = freebsd_uthread_store_registers;
|
||
freebsd_uthread_ops.to_prepare_to_store = freebsd_uthread_prepare_to_store;
|
||
freebsd_uthread_ops.to_xfer_memory = freebsd_uthread_xfer_memory;
|
||
freebsd_uthread_ops.to_files_info = freebsd_uthread_files_info;
|
||
freebsd_uthread_ops.to_insert_breakpoint = memory_insert_breakpoint;
|
||
freebsd_uthread_ops.to_remove_breakpoint = memory_remove_breakpoint;
|
||
freebsd_uthread_ops.to_terminal_init = terminal_init_inferior;
|
||
freebsd_uthread_ops.to_terminal_inferior = terminal_inferior;
|
||
freebsd_uthread_ops.to_terminal_ours_for_output = terminal_ours_for_output;
|
||
freebsd_uthread_ops.to_terminal_ours = terminal_ours;
|
||
freebsd_uthread_ops.to_terminal_info = child_terminal_info;
|
||
freebsd_uthread_ops.to_kill = freebsd_uthread_kill_inferior;
|
||
freebsd_uthread_ops.to_create_inferior = freebsd_uthread_create_inferior;
|
||
freebsd_uthread_ops.to_mourn_inferior = freebsd_uthread_mourn_inferior;
|
||
freebsd_uthread_ops.to_can_run = freebsd_uthread_can_run;
|
||
freebsd_uthread_ops.to_notice_signals = freebsd_uthread_notice_signals;
|
||
freebsd_uthread_ops.to_thread_alive = freebsd_uthread_thread_alive;
|
||
freebsd_uthread_ops.to_stop = freebsd_uthread_stop;
|
||
freebsd_uthread_ops.to_stratum = process_stratum;
|
||
freebsd_uthread_ops.to_has_all_memory = 1;
|
||
freebsd_uthread_ops.to_has_memory = 1;
|
||
freebsd_uthread_ops.to_has_stack = 1;
|
||
freebsd_uthread_ops.to_has_registers = 1;
|
||
freebsd_uthread_ops.to_has_execution = 1;
|
||
freebsd_uthread_ops.to_has_thread_control = 0;
|
||
freebsd_uthread_ops.to_magic = OPS_MAGIC;
|
||
freebsd_uthread_ops.to_find_new_threads = freebsd_uthread_find_new_threads;
|
||
freebsd_uthread_ops.to_pid_to_str = freebsd_uthread_pid_to_str;
|
||
#if 0
|
||
freebsd_uthread_vec.get_thread_info = freebsd_uthread_get_thread_info;
|
||
#endif
|
||
}
|
||
|
||
void
|
||
_initialize_freebsd_uthread ()
|
||
{
|
||
init_freebsd_uthread_ops ();
|
||
add_target (&freebsd_uthread_ops);
|
||
|
||
target_new_objfile_chain = deprecated_target_new_objfile_hook;
|
||
deprecated_target_new_objfile_hook = freebsd_uthread_new_objfile;
|
||
|
||
child_suppress_run = 1;
|
||
}
|