937 lines
23 KiB
C
937 lines
23 KiB
C
--- gdb/freebsd-uthread.c Wed Dec 31 16:00:00 1969
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+++ gdb/freebsd-uthread.c Sun Oct 13 13:10:51 2002
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@@ -0,0 +1,934 @@
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+/* $FreeBSD$ */
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+/* 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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+
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+This file is part of GDB.
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ Based largely on hpux-thread.c
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+
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+ */
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+
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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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+
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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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+
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+extern void _initialize_freebsd_uthread PARAMS ((void));
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+
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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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+
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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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+
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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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+
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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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+
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+static void init_freebsd_uthread_ops PARAMS ((void));
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+
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+static struct target_ops freebsd_uthread_ops;
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+
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+static ptid_t find_active_ptid PARAMS ((void));
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+
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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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+
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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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+
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+LIST_HEAD(idmaplist, idmap);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return tid;
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+}
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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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+
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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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+
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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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+
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+ return MERGEPID(PIDGET(inferior_ptid), im->tid);
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+}
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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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+
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+ if (!tid) return;
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+
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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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+
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+ if (!im) return;
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+
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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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+
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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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+
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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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+
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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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+
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+ READ_VALUE(PS_RUNNING);
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+ READ_VALUE(PS_DEAD);
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+}
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return find_ptid(read_pthread_uniqueid(ptr));
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+}
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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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+
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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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+
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+ if (ptid_equal(ptid, cached_ptid))
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+ return cached_pthread_addr;
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+
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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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+
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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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+
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+ return NULL;
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+}
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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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+
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+ if (ptid_equal(ptid, cached_ptid))
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+ return &cached_pthread;
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+/* After an attach, see if the target is threaded */
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+
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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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+
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+ freebsd_uthread_attaching = 0;
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+}
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ rtnval = child_ops.to_wait (ptid, ourstatus);
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+
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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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+
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+ return rtnval;
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+}
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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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+
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+#include "i386-tdep.h"
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+
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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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+
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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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+
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+#endif
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+
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+#ifdef __alpha__
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+
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+#include "alpha-tdep.h"
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+
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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 */
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+ 25, 26, 27, 28, 29, 30, 31, 32, /* t10 - zero */
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+ 38, 39, 40, 41, 42, 43, 44, 45, /* f0 - f7 */
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+ 46, 47, 48, 49, 50, 51, 52, 53, /* f8 - f15 */
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+ 54, 55, 56, 57, 58, 59, 60, 61, /* f16 - f23 */
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+ 62, 63, 64, 65, 66, 67, 68, 69, /* f24 - f31 */
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+ 33, -1 /* pc, vfp */
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+};
|
||
+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)
|
||
+ supply_register (regno, (char*) ®base[regmap[regno]]);
|
||
+ else
|
||
+ supply_register (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 */
|
||
+ memcpy(reg, registers + REGISTER_BYTE (regno),
|
||
+ REGISTER_RAW_SIZE (regno));
|
||
+
|
||
+ /* And push out to inferior */
|
||
+ off = (char *) reg - (char *) thread;
|
||
+ write_memory (ptr + off,
|
||
+ registers + REGISTER_BYTE (regno),
|
||
+ REGISTER_RAW_SIZE (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)
|
||
+{
|
||
+ child_ops.to_create_inferior (exec_file, allargs, env);
|
||
+
|
||
+ 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 (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 = target_new_objfile_hook;
|
||
+ target_new_objfile_hook = freebsd_uthread_new_objfile;
|
||
+
|
||
+ child_suppress_run = 1;
|
||
+}
|