1238 lines
31 KiB
C
1238 lines
31 KiB
C
/* Low level interface for debugging Solaris threads for GDB, the GNU debugger.
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Copyright 1996 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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/* This module implements a sort of half target that sits between the
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machine-independent parts of GDB and the /proc interface (procfs.c) to
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provide access to the Solaris user-mode thread implementation.
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Solaris threads are true user-mode threads, which are invoked via the thr_*
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and pthread_* (native and Posix respectivly) interfaces. These are mostly
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implemented in user-space, with all thread context kept in various
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structures that live in the user's heap. These should not be confused with
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lightweight processes (LWPs), which are implemented by the kernel, and
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scheduled without explicit intervention by the process.
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Just to confuse things a little, Solaris threads (both native and Posix) are
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actually implemented using LWPs. In general, there are going to be more
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threads than LWPs. There is no fixed correspondence between a thread and an
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LWP. When a thread wants to run, it gets scheduled onto the first available
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LWP and can therefore migrate from one LWP to another as time goes on. A
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sleeping thread may not be associated with an LWP at all!
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To make it possible to mess with threads, Sun provides a library called
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libthread_db.so.1 (not to be confused with libthread_db.so.0, which doesn't
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have a published interface). This interface has an upper part, which it
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provides, and a lower part which I provide. The upper part consists of the
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td_* routines, which allow me to find all the threads, query their state,
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etc... The lower part consists of all of the ps_*, which are used by the
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td_* routines to read/write memory, manipulate LWPs, lookup symbols, etc...
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The ps_* routines actually do most of their work by calling functions in
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procfs.c. */
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#include "defs.h"
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/* Undefine gregset_t and fpregset_t to avoid conflict with defs in xm file. */
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#ifdef gregset_t
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#undef gregset_t
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#endif
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#ifdef fpregset_t
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#undef fpregset_t
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#endif
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#include <thread.h>
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#include <proc_service.h>
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#include <thread_db.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 <unistd.h>
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#include <sys/stat.h>
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#include <dlfcn.h>
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extern struct target_ops sol_thread_ops; /* Forward declaration */
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extern int procfs_suppress_run;
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extern struct target_ops procfs_ops; /* target vector for procfs.c */
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/* Note that these prototypes differ slightly from those used in procfs.c
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for of two reasons. One, we can't use gregset_t, as that's got a whole
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different meaning under Solaris (also, see above). Two, we can't use the
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pointer form here as these are actually arrays of ints (for Sparc's at
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least), and are automatically coerced into pointers to ints when used as
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parameters. That makes it impossible to avoid a compiler warning when
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passing pr{g fp}regset_t's from a parameter to an argument of one of
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these functions. */
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extern void supply_gregset PARAMS ((const prgregset_t));
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extern void fill_gregset PARAMS ((prgregset_t, int));
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extern void supply_fpregset PARAMS ((const prfpregset_t));
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extern void fill_fpregset PARAMS ((prfpregset_t, int));
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/* This struct is defined by us, but mainly used for the proc_service interface.
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We don't have much use for it, except as a handy place to get a real pid
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for memory accesses. */
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struct ps_prochandle
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{
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pid_t pid;
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};
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struct string_map
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{
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int num;
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char *str;
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};
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static struct ps_prochandle main_ph;
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static td_thragent_t *main_ta;
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static int sol_thread_active = 0;
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static struct cleanup * save_inferior_pid PARAMS ((void));
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static void restore_inferior_pid PARAMS ((int pid));
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static char *td_err_string PARAMS ((td_err_e errcode));
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static char *td_state_string PARAMS ((td_thr_state_e statecode));
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static int thread_to_lwp PARAMS ((int thread_id, int default_lwp));
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static void sol_thread_resume PARAMS ((int pid, int step,
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enum target_signal signo));
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static int lwp_to_thread PARAMS ((int lwp));
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#define THREAD_FLAG 0x80000000
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#define is_thread(ARG) (((ARG) & THREAD_FLAG) != 0)
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#define is_lwp(ARG) (((ARG) & THREAD_FLAG) == 0)
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#define GET_LWP(LWP_ID) (TIDGET(LWP_ID))
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#define GET_THREAD(THREAD_ID) (((THREAD_ID) >> 16) & 0x7fff)
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#define BUILD_LWP(LWP_ID, PID) ((LWP_ID) << 16 | (PID))
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#define BUILD_THREAD(THREAD_ID, PID) (THREAD_FLAG | BUILD_LWP (THREAD_ID, PID))
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/* Pointers to routines from lithread_db resolved by dlopen() */
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static void
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(*p_td_log) (const int on_off);
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static td_err_e
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(*p_td_ta_new) (const struct ps_prochandle *ph_p, td_thragent_t **ta_pp);
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static td_err_e
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(*p_td_ta_delete) (td_thragent_t *ta_p);
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static td_err_e
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(*p_td_init) (void);
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static td_err_e
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(*p_td_ta_get_ph) (const td_thragent_t *ta_p, struct ps_prochandle **ph_pp);
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static td_err_e
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(*p_td_ta_get_nthreads) (const td_thragent_t *ta_p, int *nthread_p);
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static td_err_e
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(*p_td_ta_tsd_iter) (const td_thragent_t *ta_p, td_key_iter_f *cb, void *cbdata_p);
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static td_err_e
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(*p_td_ta_thr_iter) (const td_thragent_t *ta_p, td_thr_iter_f *cb, void *cbdata_p, td_thr_state_e state,
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int ti_pri, sigset_t *ti_sigmask_p, unsigned ti_user_flags);
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static td_err_e
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(*p_td_thr_validate) (const td_thrhandle_t *th_p);
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static td_err_e
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(*p_td_thr_tsd) (const td_thrhandle_t *th_p, const thread_key_t key, void **data_pp);
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static td_err_e
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(*p_td_thr_get_info) (const td_thrhandle_t *th_p, td_thrinfo_t *ti_p);
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static td_err_e
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(*p_td_thr_getfpregs) (const td_thrhandle_t *th_p, prfpregset_t *fpregset);
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static td_err_e
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(*p_td_thr_getxregsize) (const td_thrhandle_t *th_p, int *xregsize);
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static td_err_e
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(*p_td_thr_getxregs) (const td_thrhandle_t *th_p, const caddr_t xregset);
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static td_err_e
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(*p_td_thr_sigsetmask) (const td_thrhandle_t *th_p, const sigset_t ti_sigmask);
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static td_err_e
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(*p_td_thr_setprio) (const td_thrhandle_t *th_p, const int ti_pri);
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static td_err_e
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(*p_td_thr_setsigpending) (const td_thrhandle_t *th_p, const uchar_t ti_pending_flag, const sigset_t ti_pending);
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static td_err_e
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(*p_td_thr_setfpregs) (const td_thrhandle_t *th_p, const prfpregset_t *fpregset);
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static td_err_e
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(*p_td_thr_setxregs) (const td_thrhandle_t *th_p, const caddr_t xregset);
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static td_err_e
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(*p_td_ta_map_id2thr) (const td_thragent_t *ta_p, thread_t tid, td_thrhandle_t *th_p);
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static td_err_e
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(*p_td_ta_map_lwp2thr) (const td_thragent_t *ta_p, lwpid_t lwpid, td_thrhandle_t *th_p);
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static td_err_e
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(*p_td_thr_getgregs) (const td_thrhandle_t *th_p, prgregset_t regset);
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static td_err_e
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(*p_td_thr_setgregs) (const td_thrhandle_t *th_p, const prgregset_t regset);
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/*
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LOCAL FUNCTION
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td_err_string - Convert a thread_db error code to a string
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SYNOPSIS
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char * td_err_string (errcode)
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DESCRIPTION
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Return the thread_db error string associated with errcode. If errcode
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is unknown, then return a message.
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*/
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static char *
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td_err_string (errcode)
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td_err_e errcode;
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{
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static struct string_map
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td_err_table[] = {
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{TD_OK, "generic \"call succeeded\""},
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{TD_ERR, "generic error."},
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{TD_NOTHR, "no thread can be found to satisfy query"},
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{TD_NOSV, "no synch. variable can be found to satisfy query"},
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{TD_NOLWP, "no lwp can be found to satisfy query"},
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{TD_BADPH, "invalid process handle"},
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{TD_BADTH, "invalid thread handle"},
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{TD_BADSH, "invalid synchronization handle"},
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{TD_BADTA, "invalid thread agent"},
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{TD_BADKEY, "invalid key"},
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{TD_NOMSG, "td_thr_event_getmsg() called when there was no message"},
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{TD_NOFPREGS, "FPU register set not available for given thread"},
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{TD_NOLIBTHREAD, "application not linked with libthread"},
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{TD_NOEVENT, "requested event is not supported"},
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{TD_NOCAPAB, "capability not available"},
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{TD_DBERR, "Debugger service failed"},
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{TD_NOAPLIC, "Operation not applicable to"},
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{TD_NOTSD, "No thread specific data for this thread"},
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{TD_MALLOC, "Malloc failed"},
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{TD_PARTIALREG, "Only part of register set was writen/read"},
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{TD_NOXREGS, "X register set not available for given thread"}
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};
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const int td_err_size = sizeof td_err_table / sizeof (struct string_map);
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int i;
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static char buf[50];
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for (i = 0; i < td_err_size; i++)
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if (td_err_table[i].num == errcode)
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return td_err_table[i].str;
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sprintf (buf, "Unknown thread_db error code: %d", errcode);
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return buf;
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}
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/*
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LOCAL FUNCTION
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td_state_string - Convert a thread_db state code to a string
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SYNOPSIS
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char * td_state_string (statecode)
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DESCRIPTION
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Return the thread_db state string associated with statecode. If
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statecode is unknown, then return a message.
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*/
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static char *
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td_state_string (statecode)
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td_thr_state_e statecode;
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{
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static struct string_map
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td_thr_state_table[] = {
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{TD_THR_ANY_STATE, "any state"},
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{TD_THR_UNKNOWN, "unknown"},
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{TD_THR_STOPPED, "stopped"},
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{TD_THR_RUN, "run"},
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{TD_THR_ACTIVE, "active"},
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{TD_THR_ZOMBIE, "zombie"},
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{TD_THR_SLEEP, "sleep"},
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{TD_THR_STOPPED_ASLEEP, "stopped asleep"}
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};
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const int td_thr_state_table_size = sizeof td_thr_state_table / sizeof (struct string_map);
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int i;
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static char buf[50];
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for (i = 0; i < td_thr_state_table_size; i++)
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if (td_thr_state_table[i].num == statecode)
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return td_thr_state_table[i].str;
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sprintf (buf, "Unknown thread_db state code: %d", statecode);
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return buf;
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}
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/*
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LOCAL FUNCTION
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thread_to_lwp - Convert a Posix or Solaris thread id to a LWP id.
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SYNOPSIS
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int thread_to_lwp (thread_id, default_lwp)
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DESCRIPTION
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This function converts a Posix or Solaris thread id to a lightweight
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process id. If thread_id is non-existent, that's an error. If it's
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an inactive thread, then we return default_lwp.
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NOTES
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This function probably shouldn't call error()...
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*/
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static int
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thread_to_lwp (thread_id, default_lwp)
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int thread_id;
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int default_lwp;
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{
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td_thrinfo_t ti;
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td_thrhandle_t th;
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td_err_e val;
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int pid;
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int lwp;
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if (is_lwp (thread_id))
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return thread_id; /* It's already an LWP id */
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/* It's a thread. Convert to lwp */
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pid = PIDGET (thread_id);
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thread_id = GET_THREAD(thread_id);
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val = p_td_ta_map_id2thr (main_ta, thread_id, &th);
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if (val != TD_OK)
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error ("thread_to_lwp: td_ta_map_id2thr %s", td_err_string (val));
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val = p_td_thr_get_info (&th, &ti);
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if (val != TD_OK)
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error ("thread_to_lwp: td_thr_get_info: %s", td_err_string (val));
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if (ti.ti_state != TD_THR_ACTIVE)
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{
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if (default_lwp != -1)
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return default_lwp;
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error ("thread_to_lwp: thread state not active: %s",
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td_state_string (ti.ti_state));
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}
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lwp = BUILD_LWP (ti.ti_lid, pid);
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return lwp;
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}
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/*
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LOCAL FUNCTION
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lwp_to_thread - Convert a LWP id to a Posix or Solaris thread id.
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SYNOPSIS
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int lwp_to_thread (lwp_id)
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DESCRIPTION
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This function converts a lightweight process id to a Posix or Solaris
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thread id. If thread_id is non-existent, that's an error.
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NOTES
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This function probably shouldn't call error()...
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*/
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static int
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lwp_to_thread (lwp)
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int lwp;
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{
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td_thrinfo_t ti;
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td_thrhandle_t th;
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td_err_e val;
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int pid;
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int thread_id;
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if (is_thread (lwp))
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return lwp; /* It's already a thread id */
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/* It's an lwp. Convert it to a thread id. */
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pid = PIDGET (lwp);
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lwp = GET_LWP (lwp);
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val = p_td_ta_map_lwp2thr (main_ta, lwp, &th);
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if (val != TD_OK)
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error ("lwp_to_thread: td_thr_get_info: %s.", td_err_string (val));
|
||
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||
val = p_td_thr_get_info (&th, &ti);
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||
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if (val != TD_OK)
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error ("lwp_to_thread: td_thr_get_info: %s.", td_err_string (val));
|
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thread_id = BUILD_THREAD (ti.ti_tid, pid);
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||
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return thread_id;
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||
}
|
||
|
||
/*
|
||
|
||
LOCAL FUNCTION
|
||
|
||
save_inferior_pid - Save inferior_pid on the cleanup list
|
||
restore_inferior_pid - Restore inferior_pid from the cleanup list
|
||
|
||
SYNOPSIS
|
||
|
||
struct cleanup *save_inferior_pid ()
|
||
void restore_inferior_pid (int pid)
|
||
|
||
DESCRIPTION
|
||
|
||
These two functions act in unison to restore inferior_pid in
|
||
case of an error.
|
||
|
||
NOTES
|
||
|
||
inferior_pid is a global variable that needs to be changed by many of
|
||
these routines before calling functions in procfs.c. In order to
|
||
guarantee that inferior_pid gets restored (in case of errors), you
|
||
need to call save_inferior_pid before changing it. At the end of the
|
||
function, you should invoke do_cleanups to restore it.
|
||
|
||
*/
|
||
|
||
|
||
static struct cleanup *
|
||
save_inferior_pid ()
|
||
{
|
||
return make_cleanup (restore_inferior_pid, inferior_pid);
|
||
}
|
||
|
||
static void
|
||
restore_inferior_pid (pid)
|
||
int pid;
|
||
{
|
||
inferior_pid = pid;
|
||
}
|
||
|
||
|
||
/* Most target vector functions from here on actually just pass through to
|
||
procfs.c, as they don't need to do anything specific for threads. */
|
||
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
sol_thread_open (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
procfs_ops.to_open (arg, from_tty);
|
||
}
|
||
|
||
/* Attach to process PID, then initialize for debugging it
|
||
and wait for the trace-trap that results from attaching. */
|
||
|
||
static void
|
||
sol_thread_attach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
procfs_ops.to_attach (args, from_tty);
|
||
|
||
/* XXX - might want to iterate over all the threads and register them. */
|
||
}
|
||
|
||
/* Take a program previously attached to and detaches it.
|
||
The program resumes execution and will no longer stop
|
||
on signals, etc. We'd better not have left any breakpoints
|
||
in the program or it'll die when it hits one. For this
|
||
to work, it may be necessary for the process to have been
|
||
previously attached. It *might* work if the program was
|
||
started via the normal ptrace (PTRACE_TRACEME). */
|
||
|
||
static void
|
||
sol_thread_detach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
procfs_ops.to_detach (args, from_tty);
|
||
}
|
||
|
||
/* Resume execution of process PID. If STEP is nozero, then
|
||
just single step it. If SIGNAL is nonzero, restart it with that
|
||
signal activated. We may have to convert pid from a thread-id to an LWP id
|
||
for procfs. */
|
||
|
||
static void
|
||
sol_thread_resume (pid, step, signo)
|
||
int pid;
|
||
int step;
|
||
enum target_signal signo;
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
inferior_pid = thread_to_lwp (inferior_pid, main_ph.pid);
|
||
|
||
if (pid != -1)
|
||
{
|
||
pid = thread_to_lwp (pid, -2);
|
||
if (pid == -2) /* Inactive thread */
|
||
error ("This version of Solaris can't start inactive threads.");
|
||
}
|
||
|
||
procfs_ops.to_resume (pid, step, signo);
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
/* Wait for any threads to stop. We may have to convert PID from a thread id
|
||
to a LWP id, and vice versa on the way out. */
|
||
|
||
static int
|
||
sol_thread_wait (pid, ourstatus)
|
||
int pid;
|
||
struct target_waitstatus *ourstatus;
|
||
{
|
||
int rtnval;
|
||
int save_pid;
|
||
struct cleanup *old_chain;
|
||
|
||
save_pid = inferior_pid;
|
||
old_chain = save_inferior_pid ();
|
||
|
||
inferior_pid = thread_to_lwp (inferior_pid, main_ph.pid);
|
||
|
||
if (pid != -1)
|
||
pid = thread_to_lwp (pid, -1);
|
||
|
||
rtnval = procfs_ops.to_wait (pid, ourstatus);
|
||
|
||
if (rtnval != save_pid
|
||
&& !in_thread_list (rtnval))
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "[New %s]\n",
|
||
target_pid_to_str (rtnval));
|
||
add_thread (rtnval);
|
||
}
|
||
|
||
/* During process initialization, we may get here without the thread package
|
||
being initialized, since that can only happen after we've found the shared
|
||
libs. */
|
||
|
||
/* Map the LWP of interest back to the appropriate thread ID */
|
||
|
||
rtnval = lwp_to_thread (rtnval);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return rtnval;
|
||
}
|
||
|
||
static void
|
||
sol_thread_fetch_registers (regno)
|
||
int regno;
|
||
{
|
||
thread_t thread;
|
||
td_thrhandle_t thandle;
|
||
td_err_e val;
|
||
prgregset_t gregset;
|
||
prfpregset_t fpregset;
|
||
#if 0
|
||
int xregsize;
|
||
caddr_t xregset;
|
||
#endif
|
||
|
||
/* Convert inferior_pid into a td_thrhandle_t */
|
||
|
||
thread = GET_THREAD (inferior_pid);
|
||
|
||
if (thread == 0)
|
||
error ("sol_thread_fetch_registers: thread == 0");
|
||
|
||
val = p_td_ta_map_id2thr (main_ta, thread, &thandle);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_fetch_registers: td_ta_map_id2thr: %s",
|
||
td_err_string (val));
|
||
|
||
/* Get the integer regs */
|
||
|
||
val = p_td_thr_getgregs (&thandle, gregset);
|
||
if (val != TD_OK
|
||
&& val != TD_PARTIALREG)
|
||
error ("sol_thread_fetch_registers: td_thr_getgregs %s",
|
||
td_err_string (val));
|
||
|
||
/* For the sparc, TD_PARTIALREG means that only i0->i7, l0->l7, pc and sp
|
||
are saved (by a thread context switch). */
|
||
|
||
/* And, now the fp regs */
|
||
|
||
val = p_td_thr_getfpregs (&thandle, &fpregset);
|
||
if (val != TD_OK
|
||
&& val != TD_NOFPREGS)
|
||
error ("sol_thread_fetch_registers: td_thr_getfpregs %s",
|
||
td_err_string (val));
|
||
|
||
/* Note that we must call supply_{g fp}regset *after* calling the td routines
|
||
because the td routines call ps_lget* which affect the values stored in the
|
||
registers array. */
|
||
|
||
supply_gregset (gregset);
|
||
supply_fpregset (fpregset);
|
||
|
||
#if 0
|
||
/* thread_db doesn't seem to handle this right */
|
||
val = td_thr_getxregsize (&thandle, &xregsize);
|
||
if (val != TD_OK && val != TD_NOXREGS)
|
||
error ("sol_thread_fetch_registers: td_thr_getxregsize %s",
|
||
td_err_string (val));
|
||
|
||
if (val == TD_OK)
|
||
{
|
||
xregset = alloca (xregsize);
|
||
val = td_thr_getxregs (&thandle, xregset);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_fetch_registers: td_thr_getxregs %s",
|
||
td_err_string (val));
|
||
}
|
||
#endif
|
||
}
|
||
|
||
static void
|
||
sol_thread_store_registers (regno)
|
||
int regno;
|
||
{
|
||
thread_t thread;
|
||
td_thrhandle_t thandle;
|
||
td_err_e val;
|
||
prgregset_t regset;
|
||
prfpregset_t fpregset;
|
||
#if 0
|
||
int xregsize;
|
||
caddr_t xregset;
|
||
#endif
|
||
|
||
/* Convert inferior_pid into a td_thrhandle_t */
|
||
|
||
thread = GET_THREAD (inferior_pid);
|
||
|
||
val = p_td_ta_map_id2thr (main_ta, thread, &thandle);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_store_registers: td_ta_map_id2thr %s",
|
||
td_err_string (val));
|
||
|
||
if (regno != -1)
|
||
{ /* Not writing all the regs */
|
||
val = p_td_thr_getgregs (&thandle, regset);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_store_registers: td_thr_getgregs %s",
|
||
td_err_string (val));
|
||
val = p_td_thr_getfpregs (&thandle, &fpregset);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_store_registers: td_thr_getfpregs %s",
|
||
td_err_string (val));
|
||
|
||
#if 0
|
||
/* thread_db doesn't seem to handle this right */
|
||
val = td_thr_getxregsize (&thandle, &xregsize);
|
||
if (val != TD_OK && val != TD_NOXREGS)
|
||
error ("sol_thread_store_registers: td_thr_getxregsize %s",
|
||
td_err_string (val));
|
||
|
||
if (val == TD_OK)
|
||
{
|
||
xregset = alloca (xregsize);
|
||
val = td_thr_getxregs (&thandle, xregset);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_store_registers: td_thr_getxregs %s",
|
||
td_err_string (val));
|
||
}
|
||
#endif
|
||
}
|
||
|
||
fill_gregset (regset, regno);
|
||
fill_fpregset (fpregset, regno);
|
||
|
||
val = p_td_thr_setgregs (&thandle, regset);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_store_registers: td_thr_setgregs %s",
|
||
td_err_string (val));
|
||
val = p_td_thr_setfpregs (&thandle, &fpregset);
|
||
if (val != TD_OK)
|
||
error ("sol_thread_store_registers: td_thr_setfpregs %s",
|
||
td_err_string (val));
|
||
|
||
#if 0
|
||
/* thread_db doesn't seem to handle this right */
|
||
val = td_thr_getxregsize (&thandle, &xregsize);
|
||
if (val != TD_OK && val != TD_NOXREGS)
|
||
error ("sol_thread_store_registers: td_thr_getxregsize %s",
|
||
td_err_string (val));
|
||
|
||
/* Should probably do something about writing the xregs here, but what are
|
||
they? */
|
||
#endif
|
||
}
|
||
|
||
/* 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
|
||
sol_thread_prepare_to_store ()
|
||
{
|
||
procfs_ops.to_prepare_to_store ();
|
||
}
|
||
|
||
static int
|
||
sol_thread_xfer_memory (memaddr, myaddr, len, dowrite, target)
|
||
CORE_ADDR memaddr;
|
||
char *myaddr;
|
||
int len;
|
||
int dowrite;
|
||
struct target_ops *target; /* ignored */
|
||
{
|
||
int retval;
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
if (is_thread (inferior_pid))
|
||
inferior_pid = main_ph.pid; /* It's a thread. Convert to lwp */
|
||
|
||
retval = procfs_ops.to_xfer_memory (memaddr, myaddr, len, dowrite, target);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return retval;
|
||
}
|
||
|
||
/* Print status information about what we're accessing. */
|
||
|
||
static void
|
||
sol_thread_files_info (ignore)
|
||
struct target_ops *ignore;
|
||
{
|
||
procfs_ops.to_files_info (ignore);
|
||
}
|
||
|
||
static void
|
||
sol_thread_kill_inferior ()
|
||
{
|
||
procfs_ops.to_kill ();
|
||
}
|
||
|
||
static void
|
||
sol_thread_notice_signals (pid)
|
||
int pid;
|
||
{
|
||
procfs_ops.to_notice_signals (pid);
|
||
}
|
||
|
||
void target_new_objfile PARAMS ((struct objfile *objfile));
|
||
|
||
/* Fork an inferior process, and start debugging it with /proc. */
|
||
|
||
static void
|
||
sol_thread_create_inferior (exec_file, allargs, env)
|
||
char *exec_file;
|
||
char *allargs;
|
||
char **env;
|
||
{
|
||
procfs_ops.to_create_inferior (exec_file, allargs, env);
|
||
|
||
if (sol_thread_active)
|
||
{
|
||
main_ph.pid = inferior_pid; /* Save for xfer_memory */
|
||
|
||
push_target (&sol_thread_ops);
|
||
|
||
inferior_pid = lwp_to_thread (inferior_pid);
|
||
|
||
add_thread (inferior_pid);
|
||
}
|
||
}
|
||
|
||
/* This routine is called whenever a new symbol table is read in, or when all
|
||
symbol tables are removed. libthread_db can only be initialized when it
|
||
finds the right variables in libthread.so. Since it's a shared library,
|
||
those variables don't show up until the library gets mapped and the symbol
|
||
table is read in. */
|
||
|
||
void
|
||
sol_thread_new_objfile (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
td_err_e val;
|
||
|
||
if (!objfile)
|
||
{
|
||
sol_thread_active = 0;
|
||
|
||
return;
|
||
}
|
||
|
||
/* Now, initialize the thread debugging library. This needs to be done after
|
||
the shared libraries are located because it needs information from the
|
||
user's thread library. */
|
||
|
||
val = p_td_init ();
|
||
if (val != TD_OK)
|
||
error ("target_new_objfile: td_init: %s", td_err_string (val));
|
||
|
||
val = p_td_ta_new (&main_ph, &main_ta);
|
||
if (val == TD_NOLIBTHREAD)
|
||
return;
|
||
else if (val != TD_OK)
|
||
error ("target_new_objfile: td_ta_new: %s", td_err_string (val));
|
||
|
||
sol_thread_active = 1;
|
||
}
|
||
|
||
/* Clean up after the inferior dies. */
|
||
|
||
static void
|
||
sol_thread_mourn_inferior ()
|
||
{
|
||
procfs_ops.to_mourn_inferior ();
|
||
}
|
||
|
||
/* Mark our target-struct as eligible for stray "run" and "attach" commands. */
|
||
|
||
static int
|
||
sol_thread_can_run ()
|
||
{
|
||
return procfs_suppress_run;
|
||
}
|
||
|
||
static int
|
||
sol_thread_alive (pid)
|
||
int pid;
|
||
{
|
||
return 1;
|
||
}
|
||
|
||
static void
|
||
sol_thread_stop ()
|
||
{
|
||
procfs_ops.to_stop ();
|
||
}
|
||
|
||
/* These routines implement the lower half of the thread_db interface. Ie: the
|
||
ps_* routines. */
|
||
|
||
/* The next four routines are called by thread_db to tell us to stop and stop
|
||
a particular process or lwp. Since GDB ensures that these are all stopped
|
||
by the time we call anything in thread_db, these routines need to do
|
||
nothing. */
|
||
|
||
ps_err_e
|
||
ps_pstop (const struct ps_prochandle *ph)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
ps_err_e
|
||
ps_pcontinue (const struct ps_prochandle *ph)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
ps_err_e
|
||
ps_lstop (const struct ps_prochandle *ph, lwpid_t lwpid)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
ps_err_e
|
||
ps_lcontinue (const struct ps_prochandle *ph, lwpid_t lwpid)
|
||
{
|
||
return PS_OK;
|
||
}
|
||
|
||
ps_err_e
|
||
ps_pglobal_lookup (const struct ps_prochandle *ph, const char *ld_object_name,
|
||
const char *ld_symbol_name, paddr_t *ld_symbol_addr)
|
||
{
|
||
struct minimal_symbol *ms;
|
||
|
||
ms = lookup_minimal_symbol (ld_symbol_name, NULL, NULL);
|
||
|
||
if (!ms)
|
||
return PS_NOSYM;
|
||
|
||
*ld_symbol_addr = SYMBOL_VALUE_ADDRESS (ms);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Common routine for reading and writing memory. */
|
||
|
||
static ps_err_e
|
||
rw_common (int dowrite, const struct ps_prochandle *ph, paddr_t addr,
|
||
char *buf, int size)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
if (is_thread (inferior_pid))
|
||
inferior_pid = main_ph.pid; /* It's a thread. Convert to lwp */
|
||
|
||
while (size > 0)
|
||
{
|
||
int cc;
|
||
|
||
cc = procfs_ops.to_xfer_memory (addr, buf, size, dowrite, &procfs_ops);
|
||
|
||
if (cc < 0)
|
||
{
|
||
if (dowrite == 0)
|
||
print_sys_errmsg ("ps_pdread (): read", errno);
|
||
else
|
||
print_sys_errmsg ("ps_pdread (): write", errno);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return PS_ERR;
|
||
}
|
||
size -= cc;
|
||
buf += cc;
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
ps_err_e
|
||
ps_pdread (const struct ps_prochandle *ph, paddr_t addr, char *buf, int size)
|
||
{
|
||
return rw_common (0, ph, addr, buf, size);
|
||
}
|
||
|
||
ps_err_e
|
||
ps_pdwrite (const struct ps_prochandle *ph, paddr_t addr, char *buf, int size)
|
||
{
|
||
return rw_common (1, ph, addr, buf, size);
|
||
}
|
||
|
||
ps_err_e
|
||
ps_ptread (const struct ps_prochandle *ph, paddr_t addr, char *buf, int size)
|
||
{
|
||
return rw_common (0, ph, addr, buf, size);
|
||
}
|
||
|
||
ps_err_e
|
||
ps_ptwrite (const struct ps_prochandle *ph, paddr_t addr, char *buf, int size)
|
||
{
|
||
return rw_common (1, ph, addr, buf, size);
|
||
}
|
||
|
||
/* Get integer regs */
|
||
|
||
ps_err_e
|
||
ps_lgetregs (const struct ps_prochandle *ph, lwpid_t lwpid,
|
||
prgregset_t gregset)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
inferior_pid = BUILD_LWP (lwpid, PIDGET (inferior_pid));
|
||
|
||
procfs_ops.to_fetch_registers (-1);
|
||
fill_gregset (gregset, -1);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Set integer regs */
|
||
|
||
ps_err_e
|
||
ps_lsetregs (const struct ps_prochandle *ph, lwpid_t lwpid,
|
||
const prgregset_t gregset)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
inferior_pid = BUILD_LWP (lwpid, PIDGET (inferior_pid));
|
||
|
||
supply_gregset (gregset);
|
||
procfs_ops.to_store_registers (-1);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
void
|
||
ps_plog (const char *fmt, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, fmt);
|
||
|
||
vfprintf_filtered (gdb_stderr, fmt, args);
|
||
}
|
||
|
||
/* Get size of extra register set. Currently a noop. */
|
||
|
||
ps_err_e
|
||
ps_lgetxregsize (const struct ps_prochandle *ph, lwpid_t lwpid, int *xregsize)
|
||
{
|
||
#if 0
|
||
int lwp_fd;
|
||
int regsize;
|
||
ps_err_e val;
|
||
|
||
val = get_lwp_fd (ph, lwpid, &lwp_fd);
|
||
if (val != PS_OK)
|
||
return val;
|
||
|
||
if (ioctl (lwp_fd, PIOCGXREGSIZE, ®size))
|
||
{
|
||
if (errno == EINVAL)
|
||
return PS_NOFREGS; /* XXX Wrong code, but this is the closest
|
||
thing in proc_service.h */
|
||
|
||
print_sys_errmsg ("ps_lgetxregsize (): PIOCGXREGSIZE", errno);
|
||
return PS_ERR;
|
||
}
|
||
#endif
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Get extra register set. Currently a noop. */
|
||
|
||
ps_err_e
|
||
ps_lgetxregs (const struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
|
||
{
|
||
#if 0
|
||
int lwp_fd;
|
||
ps_err_e val;
|
||
|
||
val = get_lwp_fd (ph, lwpid, &lwp_fd);
|
||
if (val != PS_OK)
|
||
return val;
|
||
|
||
if (ioctl (lwp_fd, PIOCGXREG, xregset))
|
||
{
|
||
print_sys_errmsg ("ps_lgetxregs (): PIOCGXREG", errno);
|
||
return PS_ERR;
|
||
}
|
||
#endif
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Set extra register set. Currently a noop. */
|
||
|
||
ps_err_e
|
||
ps_lsetxregs (const struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset)
|
||
{
|
||
#if 0
|
||
int lwp_fd;
|
||
ps_err_e val;
|
||
|
||
val = get_lwp_fd (ph, lwpid, &lwp_fd);
|
||
if (val != PS_OK)
|
||
return val;
|
||
|
||
if (ioctl (lwp_fd, PIOCSXREG, xregset))
|
||
{
|
||
print_sys_errmsg ("ps_lsetxregs (): PIOCSXREG", errno);
|
||
return PS_ERR;
|
||
}
|
||
#endif
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Get floating-point regs. */
|
||
|
||
ps_err_e
|
||
ps_lgetfpregs (const struct ps_prochandle *ph, lwpid_t lwpid,
|
||
prfpregset_t *fpregset)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
inferior_pid = BUILD_LWP (lwpid, PIDGET (inferior_pid));
|
||
|
||
procfs_ops.to_fetch_registers (-1);
|
||
fill_fpregset (*fpregset, -1);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Set floating-point regs. */
|
||
|
||
ps_err_e
|
||
ps_lsetfpregs (const struct ps_prochandle *ph, lwpid_t lwpid,
|
||
const prfpregset_t *fpregset)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
old_chain = save_inferior_pid ();
|
||
|
||
inferior_pid = BUILD_LWP (lwpid, PIDGET (inferior_pid));
|
||
|
||
supply_fpregset (*fpregset);
|
||
procfs_ops.to_store_registers (-1);
|
||
|
||
do_cleanups (old_chain);
|
||
|
||
return PS_OK;
|
||
}
|
||
|
||
/* Convert a pid to printable form. */
|
||
|
||
char *
|
||
solaris_pid_to_str (pid)
|
||
int pid;
|
||
{
|
||
static char buf[100];
|
||
|
||
if (is_thread (pid))
|
||
{
|
||
int lwp;
|
||
|
||
lwp = thread_to_lwp (pid, -2);
|
||
|
||
if (lwp != -2)
|
||
sprintf (buf, "Thread %d (LWP %d)", GET_THREAD (pid), GET_LWP (lwp));
|
||
else
|
||
sprintf (buf, "Thread %d ", GET_THREAD (pid));
|
||
}
|
||
else
|
||
sprintf (buf, "LWP %d ", GET_LWP (pid));
|
||
|
||
return buf;
|
||
}
|
||
|
||
struct target_ops sol_thread_ops = {
|
||
"solaris-threads", /* to_shortname */
|
||
"Solaris threads and pthread.", /* to_longname */
|
||
"Solaris threads and pthread support.", /* to_doc */
|
||
sol_thread_open, /* to_open */
|
||
0, /* to_close */
|
||
sol_thread_attach, /* to_attach */
|
||
sol_thread_detach, /* to_detach */
|
||
sol_thread_resume, /* to_resume */
|
||
sol_thread_wait, /* to_wait */
|
||
sol_thread_fetch_registers, /* to_fetch_registers */
|
||
sol_thread_store_registers, /* to_store_registers */
|
||
sol_thread_prepare_to_store, /* to_prepare_to_store */
|
||
sol_thread_xfer_memory, /* to_xfer_memory */
|
||
sol_thread_files_info, /* to_files_info */
|
||
memory_insert_breakpoint, /* to_insert_breakpoint */
|
||
memory_remove_breakpoint, /* to_remove_breakpoint */
|
||
terminal_init_inferior, /* to_terminal_init */
|
||
terminal_inferior, /* to_terminal_inferior */
|
||
terminal_ours_for_output, /* to_terminal_ours_for_output */
|
||
terminal_ours, /* to_terminal_ours */
|
||
child_terminal_info, /* to_terminal_info */
|
||
sol_thread_kill_inferior, /* to_kill */
|
||
0, /* to_load */
|
||
0, /* to_lookup_symbol */
|
||
sol_thread_create_inferior, /* to_create_inferior */
|
||
sol_thread_mourn_inferior, /* to_mourn_inferior */
|
||
sol_thread_can_run, /* to_can_run */
|
||
sol_thread_notice_signals, /* to_notice_signals */
|
||
sol_thread_alive, /* to_thread_alive */
|
||
sol_thread_stop, /* to_stop */
|
||
process_stratum, /* to_stratum */
|
||
0, /* to_next */
|
||
1, /* to_has_all_memory */
|
||
1, /* to_has_memory */
|
||
1, /* to_has_stack */
|
||
1, /* to_has_registers */
|
||
1, /* to_has_execution */
|
||
0, /* sections */
|
||
0, /* sections_end */
|
||
OPS_MAGIC /* to_magic */
|
||
};
|
||
|
||
void
|
||
_initialize_sol_thread ()
|
||
{
|
||
void *dlhandle;
|
||
|
||
dlhandle = dlopen ("libthread_db.so.1", RTLD_NOW);
|
||
if (!dlhandle)
|
||
goto die;
|
||
|
||
#define resolve(X) \
|
||
if (!(p_##X = dlsym (dlhandle, #X))) \
|
||
goto die;
|
||
|
||
resolve (td_log);
|
||
resolve (td_ta_new);
|
||
resolve (td_ta_delete);
|
||
resolve (td_init);
|
||
resolve (td_ta_get_ph);
|
||
resolve (td_ta_get_nthreads);
|
||
resolve (td_ta_tsd_iter);
|
||
resolve (td_ta_thr_iter);
|
||
resolve (td_thr_validate);
|
||
resolve (td_thr_tsd);
|
||
resolve (td_thr_get_info);
|
||
resolve (td_thr_getfpregs);
|
||
resolve (td_thr_getxregsize);
|
||
resolve (td_thr_getxregs);
|
||
resolve (td_thr_sigsetmask);
|
||
resolve (td_thr_setprio);
|
||
resolve (td_thr_setsigpending);
|
||
resolve (td_thr_setfpregs);
|
||
resolve (td_thr_setxregs);
|
||
resolve (td_ta_map_id2thr);
|
||
resolve (td_ta_map_lwp2thr);
|
||
resolve (td_thr_getgregs);
|
||
resolve (td_thr_setgregs);
|
||
|
||
add_target (&sol_thread_ops);
|
||
|
||
procfs_suppress_run = 1;
|
||
|
||
return;
|
||
|
||
die:
|
||
|
||
fprintf_unfiltered (gdb_stderr, "[GDB will not be able to debug user-mode threads: %s]\n", dlerror ());
|
||
|
||
if (dlhandle)
|
||
dlclose (dlhandle);
|
||
|
||
return;
|
||
}
|