mirror of
https://github.com/autc04/Retro68.git
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1262 lines
43 KiB
C
1262 lines
43 KiB
C
/* Copyright (C) 2021 Free Software Foundation, Inc.
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Contributed by Oracle.
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This file is part of GNU Binutils.
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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 3, or (at your option)
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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, 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/*
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* Central SIGPROF dispatcher to various module event handlers
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* (REALPROF profile, HWC check, overview sample, manual sample)
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*/
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#include "config.h"
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#include <dlfcn.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ucontext.h>
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#include <sys/param.h>
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#include <sys/signal.h>
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#include <sys/syscall.h>
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#include <time.h>
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#include <signal.h>
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#include "gp-defs.h"
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#include "gp-experiment.h"
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#include "collector.h"
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#include "collector_module.h"
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#include "tsd.h"
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#include "hwcdrv.h"
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/* TprintfT(<level>,...) definitions. Adjust per module as needed */
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#define DBG_LT0 0 // for high-level configuration, unexpected errors/warnings
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#define DBG_LTT 0 // for interposition on GLIBC functions
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#define DBG_LT1 1 // for configuration details, warnings
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#define DBG_LT2 2
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#define DBG_LT3 3
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static void collector_sigprof_dispatcher (int, siginfo_t*, void*);
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static int init_interposition_intf ();
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#include "memmgr.h"
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static int collector_timer_create (timer_t * ptimerid);
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static int collector_timer_settime (int period, timer_t timerid);
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static int collector_timer_gettime (timer_t timerid);
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static volatile int collector_sigprof_entries = 0; /* counter for SIGPROF signals in DISPATCH_TST mode */
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static timer_t collector_master_thread_timerid = NULL;
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static collector_mutex_t collector_clone_libc_lock = COLLECTOR_MUTEX_INITIALIZER;
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static unsigned dispatcher_key = COLLECTOR_TSD_INVALID_KEY;
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static void *__real_clone = NULL;
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static void *__real_timer_create = NULL;
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static void *__real_timer_settime = NULL;
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static void *__real_timer_delete = NULL;
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static void *__real_timer_gettime = NULL;
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#if ARCH(Intel) && WSIZE(32)
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static void *__real_pthread_create_2_1 = NULL;
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static void *__real_pthread_create_2_0 = NULL;
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#elif ARCH(Intel) && WSIZE(64)
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static void *__real_timer_create_2_3_3 = NULL;
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static void *__real_timer_create_2_2_5 = NULL;
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#elif ARCH(SPARC) && WSIZE(64)
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static void *__real_timer_create_2_3_3 = NULL;
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static void *__real_timer_create_2_2 = NULL;
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#endif
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/* Original SIGPROF handler which will be replaced with the dispatcher. Used
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* to properly interact with libaio, which uses SIGPROF as its SIGAIOCANCEL. */
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static struct sigaction original_sigprof_handler;
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enum
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{
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DISPATCH_NYI = -1, /* dispatcher not yet installed */
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DISPATCH_OFF = 0, /* dispatcher installed, but disabled */
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DISPATCH_ON = 1, /* dispatcher installed, and enabled */
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DISPATCH_TST = 2 /* dispatcher installed, and enabled in testing mode */
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};
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static int dispatch_mode = DISPATCH_NYI; /* controls SIGPROF dispatching */
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static int itimer_period_requested = 0; /* dispatcher itimer period */
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static int itimer_period_actual = 0; /* actual dispatcher itimer period */
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#define CALL_REAL(x) (*(int(*)())__real_##x)
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#define NULL_PTR(x) ( __real_##x == NULL )
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static void *__real_sigaction = NULL;
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static void *__real_setitimer = NULL;
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static void *__real_libc_setitimer = NULL;
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static void *__real_sigprocmask = NULL;
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static void *__real_thr_sigsetmask = NULL;
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static void *__real_pthread_sigmask = NULL;
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static void *__real_pthread_create = NULL;
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/*
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* void collector_sigprof_dispatcher()
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*
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* Common SIGPROF event handler which dispatches events to appropriate
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* module handlers, if they are active for this collection and due.
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* Dispatch sequence, logic and handlers currently hardcoded in dispatcher.
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*/
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static void
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collector_sigprof_dispatcher (int sig, siginfo_t *info, void *context)
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{
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if (info == NULL || (info->si_code <= 0 && info->si_code != SI_TIMER))
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{
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TprintfT (DBG_LT2, "collector_sigprof_dispatcher signal for %p\n",
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original_sigprof_handler.sa_handler);
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/* pass signal to previous handler */
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/* watch for recursion, SIG_IGN, and SIG_DFL */
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if (original_sigprof_handler.sa_handler == SIG_DFL)
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__collector_SIGDFL_handler (SIGPROF);
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else if (original_sigprof_handler.sa_handler != SIG_IGN &&
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original_sigprof_handler.sa_sigaction != &collector_sigprof_dispatcher)
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{
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(original_sigprof_handler.sa_sigaction)(sig, info, context);
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TprintfT (DBG_LT2, "collector_sigprof_dispatcher handled\n");
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}
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}
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else if (dispatch_mode == DISPATCH_ON)
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{
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#if ARCH(SPARC)
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ucontext_t uctxmem;
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ucontext_t *uctx = &uctxmem;
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uctx->uc_link = NULL;
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/* 23340823 signal handler third argument should point to a ucontext_t */
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/* Convert sigcontext to ucontext_t on sparc-Linux */
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struct sigcontext *sctx = (struct sigcontext*) context;
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#if WSIZE(32)
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uctx->uc_mcontext.gregs[REG_PC] = sctx->si_regs.pc;
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__collector_memcpy (&uctx->uc_mcontext.gregs[3],
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sctx->si_regs.u_regs,
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sizeof (sctx->si_regs.u_regs));
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#else
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uctx->uc_mcontext.mc_gregs[MC_PC] = sctx->sigc_regs.tpc;
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__collector_memcpy (&uctx->uc_mcontext.mc_gregs[3],
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sctx->sigc_regs.u_regs,
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sizeof (sctx->sigc_regs.u_regs));
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#endif /* WSIZE() */
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#else /* not sparc-Linux */
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ucontext_t *uctx = (ucontext_t*) context;
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#endif /* ARCH() */
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TprintfT (DBG_LT3, "collector_sigprof_dispatcher dispatching signal\n");
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/* XXXX the order of these checks/activities may need adjustment */
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/* XXXX should also check (first) for a "cached" manual sample */
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/* HWC check for each LWP: required even if collection is paused */
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/* This should be first, otherwise it's likely to find the counters
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* stopped due to an event/overflow during some of the other activities.
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*/
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/* XXXX HWC check performed every time (skipping if HWC profiling inactive)
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* to avoid complexity of maintaining separate check times for each LWP
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*/
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__collector_ext_hwc_check (info, uctx);
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/* XXXX if sigemtpending, should perhaps skip __collector_ext_usage_sample
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* (and get it next time through)
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*/
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/* check for experiment past delay start */
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if (__collector_delay_start != 0)
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{
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hrtime_t now = __collector_gethrtime ();
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if (__collector_delay_start < now)
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{
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TprintfT (0, "__collector_ext_usage_sample: now (%lld) > delay_start (%lld)\n",
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(now - __collector_start_time), (__collector_delay_start - __collector_start_time));
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/* resume the data collection */
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__collector_delay_start = 0;
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__collector_resume ();
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/* don't take a periodic sample, just let the resume sample cover it */
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if (__collector_sample_period != 0)
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{
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/* this update should only be done for periodic samples */
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while (__collector_next_sample < now)
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__collector_next_sample += ((hrtime_t) NANOSEC) * __collector_sample_period;
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}
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/* return; */
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}
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}
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/* check for periodic sampling */
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if (__collector_gethrtime () > __collector_next_sample)
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__collector_ext_usage_sample (PERIOD_SMPL, "periodic");
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/* check for experiment past termination time */
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if (__collector_exp_active && __collector_terminate_time != 0)
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{
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hrtime_t now = __collector_gethrtime ();
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if (__collector_terminate_time < now)
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{
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TprintfT (0, "__collector_ext_usage_sample: now (%lld) > terminate_time (%lld); closing experiment\n",
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(now - __collector_start_time), (__collector_terminate_time - __collector_start_time));
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/* close the experiment */
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__collector_close_experiment ();
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}
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}
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/* call the code to process the profile data, and generate the packet */
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/* (must always be called, otherwise profile data must be aggregated,
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* but can be left till last, as already have the required data)
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*/
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__collector_ext_profile_handler (info, uctx);
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}
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else if (dispatch_mode == DISPATCH_TST)
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{
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collector_sigprof_entries++;
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return;
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}
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}
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/*
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* __collector_sigprof_install
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*/
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int
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__collector_sigprof_install ()
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{
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TprintfT (DBG_LT2, "__collector_sigprof_install\n");
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struct sigaction oact;
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if (__collector_sigaction (SIGPROF, NULL, &oact) != 0)
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return COL_ERROR_DISPINIT;
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if (oact.sa_sigaction == collector_sigprof_dispatcher)
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/* signal handler is already in place; we are probably in a fork-child */
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TprintfT (DBG_LT1, "dispatcher: __collector_ext_dispatcher_install() collector_sigprof_dispatcher already installed\n");
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else
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{
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struct sigaction c_act;
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CALL_UTIL (memset)(&c_act, 0, sizeof c_act);
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sigemptyset (&c_act.sa_mask);
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sigaddset (&c_act.sa_mask, HWCFUNCS_SIGNAL); /* block SIGEMT delivery in handler */
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c_act.sa_sigaction = collector_sigprof_dispatcher;
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c_act.sa_flags = SA_RESTART | SA_SIGINFO;
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if (__collector_sigaction (SIGPROF, &c_act, &original_sigprof_handler))
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return COL_ERROR_DISPINIT;
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}
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dispatch_mode = DISPATCH_OFF; /* don't dispatch yet */
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TprintfT (DBG_LT2, "__collector_sigprof_install done\n");
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return COL_ERROR_NONE;
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}
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/*
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* void __collector_ext_dispatcher_tsd_create_key()
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*
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* create tsd key for dispatcher
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*/
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void
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__collector_ext_dispatcher_tsd_create_key ()
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{
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dispatcher_key = __collector_tsd_create_key (sizeof (timer_t), NULL, NULL);
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}
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/*
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* int __collector_ext_dispatcher_install()
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*
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* installs a common handler/dispatcher (and itimer) for SIGPROF events
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*/
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int
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__collector_ext_dispatcher_install ()
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{
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int timer_period;
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TprintfT (DBG_LT2, "__collector_ext_dispatcher_install\n");
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/* check period set for interval timer, which will be used as the basis
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* for all timed activities: if not set, no role for SIGPROF dispatcher
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*/
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if (itimer_period_requested <= 0)
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{
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TprintfT (DBG_LT1, "No interval timer set: skipping dispatcher install!\n");
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return COL_ERROR_NONE; /* no itimer/dispatcher required */
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}
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/* check for an existing interval timer */
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if (collector_master_thread_timerid == NULL)
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if (collector_timer_create (&collector_master_thread_timerid) < 0)
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return COL_ERROR_ITMRINIT;
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timer_t *timeridptr = __collector_tsd_get_by_key (dispatcher_key);
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if (timeridptr != NULL)
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*timeridptr = collector_master_thread_timerid; // store for per thread timer stop/start
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TprintfT (DBG_LT3, "__collector_ext_dispatcher_install: collector_master_thread_timerid=%p\n",
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collector_master_thread_timerid);
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timer_period = collector_timer_gettime (collector_master_thread_timerid);
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if (timer_period > 0)
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{
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TprintfT (DBG_LT1, "Overriding app-set interval timer with period %d\n", timer_period);
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(void) __collector_log_write ("<event kind=\"%s\" id=\"%d\">%d->%d</event>\n",
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SP_JCMD_CWARN, COL_WARN_ITMRPOVR, timer_period, itimer_period_requested);
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}
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/* install the interval timer used for all timed activities */
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if (collector_timer_settime (itimer_period_requested, collector_master_thread_timerid) < 0)
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return COL_ERROR_ITMRINIT;
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TprintfT (DBG_LT2, "__collector_ext_dispatcher_install done\n");
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dispatch_mode = DISPATCH_ON; /* activate SIGPROF dispatch to event handlers */
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return COL_ERROR_NONE;
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}
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int
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__collector_sigaction (int sig, const struct sigaction *nact, struct sigaction *oact)
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{
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TprintfT (DBG_LT1, "__collector_sigaction: %d, %p\n", sig, nact ? nact->sa_sigaction : NULL);
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if (NULL_PTR (sigaction))
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init_interposition_intf ();
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/* Whether we change the signal handler in the kernel
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* or not make sure the real sigaction is aware about
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* our new handler (6227565)
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*/
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return CALL_REAL (sigaction)(sig, nact, oact);
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}
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/*
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* We have special dispatchers for SIGPROF and HWCFUNCS_SIGNAL to
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* decide whether the signal was intended for us or for the user.
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* One special case is SIGDFL, in which case we don't have a
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* user-function address to call. If the user did indeed set
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* default disposition for one of these signals and sent that
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* signal, we honor that action, even though it will lead to
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* termination.
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*/
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void
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__collector_SIGDFL_handler (int sig)
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{
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/* remove our dispatcher, replacing it with the default disposition */
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struct sigaction act;
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CALL_UTIL (memset)(&act, 0, sizeof (act));
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act.sa_handler = SIG_DFL;
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if (__collector_sigaction (sig, &act, NULL))
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{
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/* XXXXXX what are we supposed to do here? we're committing suicide anyhow */
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}
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/* resend the signal we intercepted earlier */
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// XXXX Bug 18177509 - additional sigprof signal kills target program
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kill (getpid (), sig);
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}
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/*
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* suspend/resume timer per thread
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*/
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void
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__collector_ext_dispatcher_thread_timer_suspend ()
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{
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timer_t * timeridptr = __collector_tsd_get_by_key (dispatcher_key);
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if (timeridptr != NULL && *timeridptr != NULL)
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(void) collector_timer_settime (0, *timeridptr);
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return;
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}
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int
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__collector_ext_dispatcher_thread_timer_resume ()
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{
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timer_t * timeridptr = __collector_tsd_get_by_key (dispatcher_key);
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if (timeridptr == NULL)
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return -1;
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if (*timeridptr == NULL)
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{ // timer id not initialized yet
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TprintfT (DBG_LT2, "__collector_ext_dispatcher_thread_timer_resume: timer not initialized yet, create it\n");
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if (collector_timer_create (timeridptr) == -1)
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{
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TprintfT (0, "__collector_ext_dispatcher_thread_timer_resume(): WARNING: No timer created\n");
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return -1;
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}
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}
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return collector_timer_settime (itimer_period_requested, *timeridptr);
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}
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void
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__collector_ext_dispatcher_suspend ()
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{
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TprintfT (DBG_LT2, "__collector_ext_dispatcher_suspend\n");
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if (dispatch_mode == DISPATCH_NYI)
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{
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TprintfT (0, "__collector_ext_dispatcher_suspend(): WARNING: No dispatcher installed\n");
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return;
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}
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/* disable SIGPROF dispatching */
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dispatch_mode = DISPATCH_OFF;
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/* disable the interval timer; ignore any failures */
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__collector_ext_dispatcher_thread_timer_suspend ();
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return;
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}
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void
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__collector_ext_dispatcher_restart ()
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{
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TprintfT (DBG_LT2, "__collector_ext_dispatcher_restart(ip=%d)\n", itimer_period_requested);
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if (dispatch_mode == DISPATCH_NYI)
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{
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TprintfT (0, "__collector_ext_dispatcher_restart(): WARNING: No dispatcher installed\n");
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return;
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}
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/* restart the interval timer used for all timed activities */
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if (__collector_ext_dispatcher_thread_timer_resume () == 0)
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dispatch_mode = DISPATCH_ON; /* re-activate SIGPROF dispatch to handlers */
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return;
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}
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/*
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* void __collector_ext_dispatcher_deinstall()
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*
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* If installed, disables SIGPROF dispatch and interval timer.
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* Includes checks for last SIGPROF dispatch time, interval timer period,
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* and currently installed SIGPROF handler, with appropriate warnings logged.
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* The dispatcher remains installed to handle pending collector SIGPROFs and
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* forward non-collector SIGPROFs to the application's handler(s).
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* If the decision is ever made actually to deinstall the dispatcher,
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* consider bug 4183714 and what to do about any possible pending
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* SIGPROFs.
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*/
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void
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__collector_ext_dispatcher_deinstall ()
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{
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TprintfT (DBG_LT1, "__collector_ext_dispatcher_deinstall()\n");
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if (dispatch_mode == DISPATCH_NYI)
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{
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TprintfT (0, "__collector_ext_dispatcher_deinstall(): WARNING: No dispatcher installed\n");
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return;
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}
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dispatch_mode = DISPATCH_OFF; /* disable SIGPROF dispatching */
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/* verify that interval timer is still installed with expected period */
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int timer_period = collector_timer_gettime (collector_master_thread_timerid);
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if (timer_period != itimer_period_actual)
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{
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TprintfT (DBG_LT2, "dispatcher: Collector interval timer period changed %d -> %d\n",
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itimer_period_actual, timer_period);
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if ((itimer_period_actual >= (timer_period + timer_period / 10)) ||
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(itimer_period_actual <= (timer_period - timer_period / 10)))
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__collector_log_write ("<event kind=\"%s\" id=\"%d\">%d -> %d</event>\n",
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SP_JCMD_CWARN, COL_WARN_ITMRREP,
|
|
itimer_period_actual, timer_period);
|
|
else
|
|
__collector_log_write ("<event kind=\"%s\" id=\"%d\">%d -> %d</event>\n",
|
|
SP_JCMD_COMMENT, COL_WARN_PROFRND,
|
|
itimer_period_actual, timer_period);
|
|
}
|
|
|
|
/* Verify that SIGPROF dispatcher is still installed.
|
|
* (still required with sigaction interposition and management,
|
|
* since interposition is not done for attach experiments)
|
|
*/
|
|
struct sigaction curr;
|
|
if (__collector_sigaction (SIGPROF, NULL, &curr) == -1)
|
|
TprintfT (0, "ERROR: dispatcher sigaction check failed: errno=%d\n", errno);
|
|
else if (curr.sa_sigaction != collector_sigprof_dispatcher)
|
|
{
|
|
TprintfT (0, "ERROR: collector dispatcher replaced by %p!\n", curr.sa_handler);
|
|
(void) __collector_log_write ("<event kind=\"%s\" id=\"%d\">%p</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_SIGPROF, curr.sa_handler);
|
|
}
|
|
else
|
|
TprintfT (DBG_LT2, "collector dispatcher integrity verified!\n");
|
|
|
|
/* disable the interval timer; ignore any failures */
|
|
if (collector_master_thread_timerid != NULL)
|
|
{
|
|
(void) CALL_REAL (timer_delete)(collector_master_thread_timerid);
|
|
collector_master_thread_timerid = NULL;
|
|
}
|
|
dispatcher_key = COLLECTOR_TSD_INVALID_KEY;
|
|
itimer_period_requested = 0;
|
|
itimer_period_actual = 0;
|
|
}
|
|
|
|
/*
|
|
* void __collector_ext_dispatcher_fork_child_cleanup()
|
|
*
|
|
* delete timer, clear timer interval
|
|
*/
|
|
void
|
|
__collector_ext_dispatcher_fork_child_cleanup ()
|
|
{
|
|
if (collector_master_thread_timerid != NULL)
|
|
{
|
|
(void) CALL_REAL (timer_delete)(collector_master_thread_timerid);
|
|
collector_master_thread_timerid = NULL;
|
|
}
|
|
__collector_mutex_init (&collector_clone_libc_lock);
|
|
dispatcher_key = COLLECTOR_TSD_INVALID_KEY;
|
|
itimer_period_requested = 0;
|
|
itimer_period_actual = 0;
|
|
}
|
|
/*
|
|
* int __collector_ext_itimer_set (int rperiod)
|
|
*
|
|
* set itimer period, if not yet set to a positive number of microseconds,
|
|
* (after rounding to sys_resolution if necessary) and return its value
|
|
*/
|
|
int
|
|
__collector_ext_itimer_set (int rperiod)
|
|
{
|
|
int period;
|
|
/* if rperiod is negative, force setting */
|
|
if (rperiod < 0)
|
|
{
|
|
itimer_period_actual = 0;
|
|
period = -rperiod;
|
|
}
|
|
else
|
|
period = rperiod;
|
|
|
|
// ignore SIGPROF while testing itimer interval setting
|
|
int saved = dispatch_mode;
|
|
dispatch_mode = DISPATCH_OFF;
|
|
if (collector_timer_create (&collector_master_thread_timerid) == -1)
|
|
{
|
|
TprintfT (0, "__collector_ext_itimer_set(): WARNING: No timer created\n");
|
|
return itimer_period_actual;
|
|
}
|
|
if (collector_timer_settime (period, collector_master_thread_timerid) == 0)
|
|
{
|
|
itimer_period_actual = collector_timer_gettime (collector_master_thread_timerid);
|
|
(void) collector_timer_settime (0, collector_master_thread_timerid); /* XXXX unset for now */
|
|
itimer_period_requested = period;
|
|
if (itimer_period_requested != itimer_period_actual)
|
|
{
|
|
TprintfT (DBG_LT2, " itimer period %d adjusted to %d\n",
|
|
itimer_period_requested, itimer_period_actual);
|
|
// (void) __collector_log_write("<event kind=\"%s\" id=\"%d\">%d -> %d</event>\n",
|
|
// SP_JCMD_CWARN, COL_WARN_PROFRND, itimer_period_requested, itimer_period_actual);
|
|
}
|
|
else
|
|
TprintfT (DBG_LT2, " itimer period %d accepted\n", period);
|
|
}
|
|
|
|
// restore dispatching SIGPROF handler
|
|
dispatch_mode = saved;
|
|
TprintfT (0, "__collector_ext_itimer_set(%d), requested=%d, actual=%d)\n",
|
|
rperiod, itimer_period_requested, itimer_period_actual);
|
|
return (itimer_period_actual);
|
|
}
|
|
|
|
static int
|
|
collector_timer_gettime (timer_t timerid)
|
|
{
|
|
int timer_period;
|
|
struct itimerspec itimer;
|
|
if (timerid == NULL)
|
|
return (0); // timer was not initialized
|
|
if (CALL_REAL (timer_gettime)(timerid, &itimer) == -1)
|
|
{
|
|
/* this should never reasonably fail, so not worth logging */
|
|
TprintfT (DBG_LT1, "WARNING: timer_gettime failed: errno=%d\n", errno);
|
|
return (-1);
|
|
}
|
|
timer_period = ((itimer.it_interval.tv_sec * NANOSEC) +
|
|
itimer.it_interval.tv_nsec) / 1000;
|
|
TprintfT (DBG_LT2, "collector_timer_gettime (period=%d)\n", timer_period);
|
|
return (timer_period);
|
|
}
|
|
|
|
static int
|
|
collector_timer_create (timer_t * ptimerid)
|
|
{
|
|
struct sigevent sigev;
|
|
if (NULL_PTR (timer_create))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LT2, "collector_timer_settime(): timer_create is %p\n", __real_timer_create);
|
|
sigev.sigev_notify = SIGEV_THREAD_ID | SIGEV_SIGNAL;
|
|
sigev.sigev_signo = SIGPROF;
|
|
sigev.sigev_value.sival_ptr = ptimerid;
|
|
sigev._sigev_un._tid = __collector_gettid ();
|
|
if (CALL_REAL (timer_create)(CLOCK_THREAD_CPUTIME_ID, &sigev, ptimerid) == -1)
|
|
{
|
|
TprintfT (DBG_LT2, "collector_timer_settime() failed! errno=%d\n", errno);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
collector_timer_settime (int period, timer_t timerid)
|
|
{
|
|
struct itimerspec itimer;
|
|
if (NULL_PTR (timer_settime))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LT2, "collector_timer_settime(period=%d)\n", period);
|
|
time_t NPM = 1000;
|
|
itimer.it_interval.tv_sec = NPM * period / NANOSEC;
|
|
itimer.it_interval.tv_nsec = (NPM * period) % NANOSEC;
|
|
itimer.it_value = itimer.it_interval;
|
|
if (CALL_REAL (timer_settime)(timerid, 0, &itimer, NULL) == -1)
|
|
{
|
|
TprintfT (DBG_LT2, "collector_timer_settime(%d) failed! errno=%d\n", period, errno);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
protect_profiling_signals (sigset_t* lset)
|
|
{
|
|
static unsigned int protected_sigprof = 0;
|
|
static unsigned int protected_sigemt = 0;
|
|
// T1 relies on thread signal masking, so best not to mess with it:
|
|
// T1 users have already been warned about the dangers of its use
|
|
if (__collector_libthread_T1)
|
|
return;
|
|
if (sigismember (lset, SIGPROF) && (dispatch_mode == DISPATCH_ON))
|
|
{
|
|
TprintfT (0, "WARNING: ignoring %s block while profiling\n", "SIGPROF");
|
|
if (protected_sigprof == 0)
|
|
__collector_log_write ("<event kind=\"%s\" id=\"%d\">%s</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_SIGMASK, "SIGPROF");
|
|
sigdelset (lset, SIGPROF);
|
|
protected_sigprof++;
|
|
}
|
|
if (sigismember (lset, HWCFUNCS_SIGNAL) && __collector_ext_hwc_active ())
|
|
{
|
|
TprintfT (0, "WARNING: ignoring %s block while profiling\n", "SIGEMT");
|
|
if (protected_sigemt == 0)
|
|
__collector_log_write ("<event kind=\"%s\" id=\"%d\">%s</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_SIGMASK, HWCFUNCS_SIGNAL_STRING);
|
|
sigdelset (lset, HWCFUNCS_SIGNAL);
|
|
protected_sigemt++;
|
|
}
|
|
}
|
|
|
|
#define SYS_SETITIMER_NAME "setitimer"
|
|
#define SYS_SIGACTION_NAME "sigaction"
|
|
#define SYS_SIGPROCMASK_NAME "sigprocmask"
|
|
#define SYS_PTHREAD_SIGMASK "pthread_sigmask"
|
|
#define SYS_THR_SIGSETMASK "thr_sigsetmask"
|
|
|
|
static int
|
|
init_interposition_intf ()
|
|
{
|
|
if (__collector_dlsym_guard)
|
|
return 1;
|
|
void *dlflag;
|
|
/* Linux requires RTLD_LAZY, Solaris can do just RTLD_NOLOAD */
|
|
void *handle = dlopen (SYS_LIBC_NAME, RTLD_LAZY | RTLD_NOLOAD);
|
|
|
|
#if ARCH(SPARC) && WSIZE(64)
|
|
/* dlopen a bogus path to avoid CR 23608692 */
|
|
dlopen ("/bogus_path_for_23608692_workaround/", RTLD_LAZY | RTLD_NOLOAD);
|
|
#endif
|
|
__real_setitimer = dlsym (RTLD_NEXT, SYS_SETITIMER_NAME);
|
|
|
|
if (__real_setitimer == NULL)
|
|
{
|
|
__real_setitimer = dlsym (RTLD_DEFAULT, SYS_SETITIMER_NAME);
|
|
if (__real_setitimer == NULL)
|
|
{
|
|
TprintfT (DBG_LT2, "init_interposition_intf() setitimer not found\n");
|
|
return 1;
|
|
}
|
|
dlflag = RTLD_DEFAULT;
|
|
}
|
|
else
|
|
dlflag = RTLD_NEXT;
|
|
|
|
TprintfT (DBG_LT2, "init_interposition_intf() using RTLD_%s\n",
|
|
(dlflag == RTLD_DEFAULT) ? "DEFAULT" : "NEXT");
|
|
TprintfT (DBG_LT2, "@%p __real_setitimer\n", __real_setitimer);
|
|
|
|
__real_sigaction = dlsym (dlflag, SYS_SIGACTION_NAME);
|
|
TprintfT (DBG_LT2, "@%p __real_sigaction\n", __real_sigaction);
|
|
|
|
/* also explicitly get libc.so/setitimer (as a backup) */
|
|
__real_libc_setitimer = dlsym (handle, SYS_SETITIMER_NAME);
|
|
TprintfT (DBG_LT2, "@%p __real_libc_setitimer\n", __real_libc_setitimer);
|
|
|
|
__real_sigprocmask = dlsym (dlflag, SYS_SIGPROCMASK_NAME);
|
|
TprintfT (DBG_LT2, "@%p __real_sigprocmask\n", __real_sigprocmask);
|
|
|
|
__real_thr_sigsetmask = dlsym (dlflag, SYS_THR_SIGSETMASK);
|
|
TprintfT (DBG_LT2, "@%p __real_thr_sigsetmask\n", __real_thr_sigsetmask);
|
|
|
|
__real_pthread_sigmask = dlsym (dlflag, SYS_PTHREAD_SIGMASK);
|
|
TprintfT (DBG_LT2, "@%p __real_pthread_sigmask\n", __real_pthread_sigmask);
|
|
|
|
#if ARCH(Aarch64)
|
|
__real_pthread_create = dlvsym (dlflag, "pthread_create", SYS_PTHREAD_CREATE_VERSION);
|
|
__real_timer_create = dlsym (dlflag, "timer_create");
|
|
__real_timer_settime = dlsym (dlflag, "timer_settime");
|
|
__real_timer_delete = dlsym (dlflag, "timer_delete");
|
|
__real_timer_gettime = dlsym (dlflag, "timer_gettime");
|
|
#else
|
|
__real_pthread_create = dlvsym (dlflag, "pthread_create", SYS_PTHREAD_CREATE_VERSION);
|
|
TprintfT (DBG_LT2, "[%s] @%p __real_pthread_create\n", SYS_PTHREAD_CREATE_VERSION, __real_pthread_create);
|
|
__real_timer_create = dlvsym (dlflag, "timer_create", SYS_TIMER_X_VERSION);
|
|
TprintfT (DBG_LT2, "init_lineage_intf() [%s] @0x%p __real_timer_create\n", SYS_TIMER_X_VERSION, __real_timer_create);
|
|
__real_timer_settime = dlvsym (dlflag, "timer_settime", SYS_TIMER_X_VERSION);
|
|
TprintfT (DBG_LT2, "init_lineage_intf() [%s] @0x%p __real_timer_settime\n", SYS_TIMER_X_VERSION, __real_timer_settime);
|
|
__real_timer_delete = dlvsym (dlflag, "timer_delete", SYS_TIMER_X_VERSION);
|
|
TprintfT (DBG_LT2, "init_lineage_intf() [%s] @0x%p __real_timer_delete\n", SYS_TIMER_X_VERSION, __real_timer_delete);
|
|
__real_timer_gettime = dlvsym (dlflag, "timer_gettime", SYS_TIMER_X_VERSION);
|
|
TprintfT (DBG_LT2, "init_lineage_intf() [%s] @0x%p __real_timer_gettime\n", SYS_TIMER_X_VERSION, __real_timer_gettime);
|
|
__real_clone = dlsym (dlflag, "clone");
|
|
TprintfT (DBG_LT2, "init_lineage_intf() @0x%p __real_clone\n", __real_clone);
|
|
#if ARCH(Intel) && WSIZE(32)
|
|
__real_pthread_create_2_1 = __real_pthread_create;
|
|
__real_pthread_create_2_0 = dlvsym (dlflag, "pthread_create", "GLIBC_2.0");
|
|
#elif ARCH(Intel) && WSIZE(64)
|
|
__real_timer_create_2_3_3 = __real_timer_create;
|
|
__real_timer_create_2_2_5 = dlvsym (dlflag, "timer_create", "GLIBC_2.2.5");
|
|
#elif ARCH(SPARC) && WSIZE(64)
|
|
__real_timer_create_2_3_3 = __real_timer_create;
|
|
__real_timer_create_2_2 = dlvsym (dlflag, "timer_create", "GLIBC_2.2");
|
|
#endif /* ARCH() && SIZE() */
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*------------------------------------------------------------- sigaction */
|
|
|
|
/* NB: need a global interposing function called "sigaction" */
|
|
int
|
|
sigaction (int sig, const struct sigaction *nact, struct sigaction *oact)
|
|
{
|
|
int ret = 0;
|
|
int err = 0;
|
|
if (NULL_PTR (sigaction))
|
|
err = init_interposition_intf ();
|
|
if (err)
|
|
return -1;
|
|
TprintfT (DBG_LT3, "sigaction(sig=%02d, nact=%p) interposing\n", sig, nact);
|
|
if (sig == SIGPROF && dispatch_mode != DISPATCH_NYI)
|
|
{
|
|
if (oact != NULL)
|
|
{
|
|
oact->sa_handler = original_sigprof_handler.sa_handler;
|
|
oact->sa_mask = original_sigprof_handler.sa_mask;
|
|
oact->sa_flags = original_sigprof_handler.sa_flags;
|
|
}
|
|
if (nact != NULL)
|
|
{
|
|
original_sigprof_handler.sa_handler = nact->sa_handler;
|
|
original_sigprof_handler.sa_mask = nact->sa_mask;
|
|
original_sigprof_handler.sa_flags = nact->sa_flags;
|
|
TprintfT (DBG_LT1, "dispatcher: new sigaction(sig=%02d) set\n", sig);
|
|
}
|
|
}
|
|
else if (sig == HWCFUNCS_SIGNAL)
|
|
ret = collector_sigemt_sigaction (nact, oact);
|
|
else
|
|
{
|
|
if (sig != SIGCHLD || collector_sigchld_sigaction (nact, oact))
|
|
ret = CALL_REAL (sigaction)(sig, nact, oact);
|
|
TprintfT (DBG_LT3, "Real sigaction(sig=%02d) returned %d (oact=%p)\n",
|
|
sig, ret, oact);
|
|
/* but check for other important signals */
|
|
/* check for sample and pause/resume signals; give warning once, if need be */
|
|
if ((sig == __collector_sample_sig) && (__collector_sample_sig_warn == 0))
|
|
{
|
|
/* give user a warning */
|
|
(void) __collector_log_write ("<event kind=\"%s\" id=\"%d\">%d</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_SAMPSIGUSED, __collector_sample_sig);
|
|
__collector_sample_sig_warn = 1;
|
|
}
|
|
if ((sig == __collector_pause_sig) && (__collector_pause_sig_warn == 0))
|
|
{
|
|
/* give user a warning */
|
|
(void) __collector_log_write ("<event kind=\"%s\" id=\"%d\">%d</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_PAUSESIGUSED, __collector_pause_sig);
|
|
__collector_pause_sig_warn = 1;
|
|
}
|
|
}
|
|
TprintfT (DBG_LT3, "sigaction() returning %d (oact=%p)\n", ret, oact);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* In addition to interposing on sigaction(), should we also interpose
|
|
* on other important signal functions like signal() or sigset()?
|
|
* - On Solaris, those other functions apparently call sigaction().
|
|
* So, we only have to interpose on it.
|
|
* - On Linux, we should perhaps interpose on these other functions,
|
|
* but they are less portable than sigaction() and deprecated or even obsolete.
|
|
* So, we interpose, but don't overly worry about doing a good job.
|
|
*/
|
|
sighandler_t
|
|
signal (int sig, sighandler_t handler)
|
|
{
|
|
struct sigaction nact;
|
|
struct sigaction oact;
|
|
TprintfT (DBG_LT3, "signal(sig=%02d, handler=%p) interposing\n", sig, handler);
|
|
sigemptyset (&nact.sa_mask);
|
|
nact.sa_handler = handler;
|
|
nact.sa_flags = SA_RESTART;
|
|
if (sigaction (sig, &nact, &oact))
|
|
return SIG_ERR;
|
|
TprintfT (DBG_LT3, "signal() returning %p\n", oact.sa_handler);
|
|
return oact.sa_handler;
|
|
}
|
|
|
|
sighandler_t
|
|
sigset (int sig, sighandler_t handler)
|
|
{
|
|
TprintfT (DBG_LT3, "sigset(sig=%02d, handler=%p) interposing\n", sig, handler);
|
|
return signal (sig, handler);
|
|
}
|
|
|
|
/*------------------------------------------------------------- timer_create */
|
|
|
|
// map interposed symbol versions
|
|
#if WSIZE(64)
|
|
#if ARCH(SPARC) || ARCH(Intel)
|
|
static int
|
|
__collector_timer_create_symver (int(real_timer_create) (), clockid_t clockid, struct sigevent *sevp,
|
|
timer_t *timerid);
|
|
|
|
SYMVER_ATTRIBUTE (__collector_timer_create_2_3_3, timer_create@@GLIBC_2.3.3)
|
|
int
|
|
__collector_timer_create_2_3_3 (clockid_t clockid, struct sigevent *sevp,
|
|
timer_t *timerid)
|
|
{
|
|
if (NULL_PTR (timer_create))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LTT, "dispatcher: GLIBC: __collector_timer_create_2_3_3@%p\n", CALL_REAL (timer_create_2_3_3));
|
|
return __collector_timer_create_symver (CALL_REAL (timer_create_2_3_3), clockid, sevp, timerid);
|
|
}
|
|
#endif /* ARCH(SPARC) || ARCH(Intel)*/
|
|
|
|
#if ARCH(SPARC)
|
|
|
|
SYMVER_ATTRIBUTE (__collector_timer_create_2_2, timer_create@GLIBC_2.2)
|
|
int
|
|
__collector_timer_create_2_2 (clockid_t clockid, struct sigevent *sevp,
|
|
timer_t *timerid)
|
|
{
|
|
if (NULL_PTR (timer_create))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LTT, "dispatcher: GLIBC: __collector_timer_create_2_2@%p\n", CALL_REAL (timer_create_2_2));
|
|
return __collector_timer_create_symver (CALL_REAL (timer_create_2_2), clockid, sevp, timerid);
|
|
}
|
|
|
|
#elif ARCH(Intel)
|
|
|
|
SYMVER_ATTRIBUTE (__collector_timer_create_2_2_5, timer_create@GLIBC_2.2.5)
|
|
int
|
|
__collector_timer_create_2_2_5 (clockid_t clockid, struct sigevent *sevp,
|
|
timer_t *timerid)
|
|
{
|
|
if (NULL_PTR (timer_create))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LTT, "dispatcher: GLIBC: __collector_timer_create_2_2_5@%p\n", CALL_REAL (timer_create_2_2_5));
|
|
return __collector_timer_create_symver (CALL_REAL (timer_create_2_2_5), clockid, sevp, timerid);
|
|
}
|
|
#endif /* ARCH() */
|
|
#endif /* WSIZE(64) */
|
|
|
|
#if ARCH(Aarch64) || (ARCH(Intel) && WSIZE(32))
|
|
int timer_create (clockid_t clockid, struct sigevent *sevp, timer_t *timerid)
|
|
#else
|
|
static int
|
|
__collector_timer_create_symver (int(real_timer_create) (), clockid_t clockid,
|
|
struct sigevent *sevp, timer_t *timerid)
|
|
#endif
|
|
{
|
|
int ret;
|
|
|
|
if (NULL_PTR (timer_create))
|
|
init_interposition_intf ();
|
|
|
|
/* collector reserves SIGPROF
|
|
*/
|
|
if (sevp == NULL || sevp->sigev_notify != SIGEV_SIGNAL
|
|
|| sevp->sigev_signo != SIGPROF)
|
|
{
|
|
#if ARCH(Aarch64) || (ARCH(Intel) && WSIZE(32))
|
|
ret = CALL_REAL (timer_create)(clockid, sevp, timerid);
|
|
#else
|
|
ret = (real_timer_create) (clockid, sevp, timerid);
|
|
#endif
|
|
TprintfT (DBG_LT2, "Real timer_create(%d) returned %d\n",
|
|
clockid, ret);
|
|
return ret;
|
|
}
|
|
|
|
/* log that application's timer_create request is overridden */
|
|
(void) __collector_log_write ("<event kind=\"%s\" id=\"%d\">%d</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_ITMROVR, -1);
|
|
ret = -1;
|
|
errno = EBUSY;
|
|
TprintfT (DBG_LT2, "timer_create() returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
/*------------------------------------------------------------- setitimer */
|
|
int
|
|
_setitimer (int which, const struct itimerval *nval,
|
|
struct itimerval *oval)
|
|
{
|
|
int ret;
|
|
int period;
|
|
|
|
if (NULL_PTR (setitimer))
|
|
init_interposition_intf ();
|
|
|
|
if (nval == NULL)
|
|
period = -1;
|
|
else
|
|
period = (nval->it_interval.tv_sec * MICROSEC) +
|
|
nval->it_interval.tv_usec;
|
|
TprintfT (DBG_LT1, "setitimer(which=%d,nval=%dus) interposing\n", which, period);
|
|
|
|
/* collector reserves ITIMER_REALPROF for its own use, and ITIMER_PROF
|
|
* uses the same signal (SIGPROF) so it must also be reserved
|
|
*/
|
|
if (((which != ITIMER_REALPROF) && (which != ITIMER_PROF)) || (nval == NULL))
|
|
{
|
|
ret = CALL_REAL (setitimer)(which, nval, oval);
|
|
if (oval == NULL)
|
|
period = -1;
|
|
else
|
|
period = (oval->it_interval.tv_sec * MICROSEC) +
|
|
oval->it_interval.tv_usec;
|
|
TprintfT (DBG_LT2, "Real setitimer(%d) returned %d (oval=%dus)\n",
|
|
which, ret, period);
|
|
return ret;
|
|
}
|
|
/* log that application's setitimer request is overridden */
|
|
(void) __collector_log_write ("<event kind=\"%s\" id=\"%d\">%d</event>\n",
|
|
SP_JCMD_CWARN, COL_WARN_ITMROVR, period);
|
|
if (oval == NULL)
|
|
period = -1;
|
|
else
|
|
{
|
|
getitimer (which, oval); /* return current itimer setting */
|
|
period = (oval->it_interval.tv_sec * MICROSEC) +
|
|
oval->it_interval.tv_usec;
|
|
}
|
|
ret = -1;
|
|
errno = EBUSY;
|
|
TprintfT (DBG_LT2, "setitimer() returning %d (oval=%dus)\n", ret, period);
|
|
return ret;
|
|
}
|
|
|
|
/*--------------------------------------------------------------- sigprocmask */
|
|
int
|
|
__collector_sigprocmask (int how, const sigset_t* iset, sigset_t* oset)
|
|
{
|
|
int err = 0;
|
|
if (NULL_PTR (sigprocmask))
|
|
err = init_interposition_intf ();
|
|
if (err)
|
|
return -1;
|
|
TprintfT (DBG_LT2, "__collector_sigprocmask(%d) interposing\n", how);
|
|
sigset_t lsigset;
|
|
sigset_t* lset = NULL;
|
|
if (iset)
|
|
{
|
|
lsigset = *iset;
|
|
lset = &lsigset;
|
|
if ((how == SIG_BLOCK) || (how == SIG_SETMASK))
|
|
protect_profiling_signals (lset);
|
|
}
|
|
int ret = CALL_REAL (sigprocmask)(how, lset, oset);
|
|
TprintfT (DBG_LT2, "__collector_sigprocmask(%d) returning %d\n", how, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*------------------------------------------------------------ thr_sigsetmask */
|
|
int
|
|
__collector_thr_sigsetmask (int how, const sigset_t* iset, sigset_t* oset)
|
|
{
|
|
if (NULL_PTR (thr_sigsetmask))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LT1, "__collector_thr_sigsetmask(%d) interposing\n", how);
|
|
sigset_t lsigset;
|
|
sigset_t* lset = NULL;
|
|
if (iset)
|
|
{
|
|
lsigset = *iset;
|
|
lset = &lsigset;
|
|
if ((how == SIG_BLOCK) || (how == SIG_SETMASK))
|
|
protect_profiling_signals (lset);
|
|
}
|
|
int ret = CALL_REAL (thr_sigsetmask)(how, lset, oset);
|
|
TprintfT (DBG_LT1, "__collector_thr_sigsetmask(%d) returning %d\n", how, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*----------------------------------------------------------- pthread_sigmask */
|
|
|
|
int
|
|
pthread_sigmask (int how, const sigset_t* iset, sigset_t* oset)
|
|
{
|
|
if (NULL_PTR (pthread_sigmask))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LT1, "__collector_pthread_sigmask(%d) interposing\n", how);
|
|
sigset_t lsigset;
|
|
sigset_t* lset = NULL;
|
|
if (iset)
|
|
{
|
|
lsigset = *iset;
|
|
lset = &lsigset;
|
|
if ((how == SIG_BLOCK) || (how == SIG_SETMASK))
|
|
protect_profiling_signals (lset);
|
|
}
|
|
int ret = CALL_REAL (pthread_sigmask)(how, lset, oset);
|
|
TprintfT (DBG_LT1, "__collector_pthread_sigmask(%d) returning %d\n", how, ret);
|
|
return ret;
|
|
}
|
|
/*----------------------------------------------------------- pthread_create */
|
|
typedef struct _CollectorArgs
|
|
{
|
|
void *(*func)(void*);
|
|
void *arg;
|
|
void *stack;
|
|
int isPthread;
|
|
} CollectorArgs;
|
|
|
|
static void *
|
|
collector_root (void *cargs)
|
|
{
|
|
/* save the real arguments and free cargs */
|
|
void *(*func)(void*) = ((CollectorArgs*) cargs)->func;
|
|
void *arg = ((CollectorArgs*) cargs)->arg;
|
|
void *stack = ((CollectorArgs*) cargs)->stack;
|
|
int isPthread = ((CollectorArgs*) cargs)->isPthread;
|
|
__collector_freeCSize (__collector_heap, cargs, sizeof (CollectorArgs));
|
|
|
|
/* initialize tsd for this thread */
|
|
if (__collector_tsd_allocate () == 0)
|
|
/* init tsd for unwind, called right after __collector_tsd_allocate()*/
|
|
__collector_ext_unwind_key_init (isPthread, stack);
|
|
|
|
if (!isPthread)
|
|
__collector_mutex_lock (&collector_clone_libc_lock);
|
|
|
|
/* set the profile timer */
|
|
timer_t *timeridptr = __collector_tsd_get_by_key (dispatcher_key);
|
|
timer_t timerid = NULL;
|
|
if (timeridptr != NULL)
|
|
{
|
|
collector_timer_create (timeridptr);
|
|
if (*timeridptr != NULL)
|
|
collector_timer_settime (itimer_period_requested, *timeridptr);
|
|
timerid = *timeridptr;
|
|
}
|
|
int hwc_rc = __collector_ext_hwc_lwp_init ();
|
|
|
|
if (!isPthread)
|
|
__collector_mutex_unlock (&collector_clone_libc_lock);
|
|
/* call the real function */
|
|
void *ret = func (arg);
|
|
if (!isPthread)
|
|
__collector_mutex_lock (&collector_clone_libc_lock);
|
|
if (timerid != NULL)
|
|
CALL_REAL (timer_delete)(timerid);
|
|
if (!hwc_rc)
|
|
/* pthread_kill not handled here */
|
|
__collector_ext_hwc_lwp_fini ();
|
|
|
|
if (!isPthread)
|
|
__collector_mutex_unlock (&collector_clone_libc_lock);
|
|
/* if we have this chance, release tsd */
|
|
__collector_tsd_release ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
// map interposed symbol versions
|
|
#if ARCH(Intel) && WSIZE(32)
|
|
static int
|
|
__collector_pthread_create_symver (int(real_pthread_create) (),
|
|
pthread_t *thread,
|
|
const pthread_attr_t *attr,
|
|
void *(*func)(void*),
|
|
void *arg);
|
|
|
|
SYMVER_ATTRIBUTE (__collector_pthread_create_2_1, pthread_create@@GLIBC_2.1)
|
|
int
|
|
__collector_pthread_create_2_1 (pthread_t *thread,
|
|
const pthread_attr_t *attr,
|
|
void *(*func)(void*),
|
|
void *arg)
|
|
{
|
|
if (NULL_PTR (pthread_create))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LTT, "dispatcher: GLIBC: __collector_pthread_create_2_1@%p\n", CALL_REAL (pthread_create_2_1));
|
|
return __collector_pthread_create_symver (CALL_REAL (pthread_create_2_1), thread, attr, func, arg);
|
|
}
|
|
|
|
SYMVER_ATTRIBUTE (__collector_pthread_create_2_0, pthread_create@GLIBC_2.0)
|
|
int
|
|
__collector_pthread_create_2_0 (pthread_t *thread,
|
|
const pthread_attr_t *attr,
|
|
void *(*func)(void*),
|
|
void *arg)
|
|
{
|
|
if (NULL_PTR (pthread_create))
|
|
init_interposition_intf ();
|
|
TprintfT (DBG_LTT, "dispatcher: GLIBC: __collector_pthread_create_2_0@%p\n", CALL_REAL (pthread_create_2_0));
|
|
return __collector_pthread_create_symver (CALL_REAL (pthread_create_2_0), thread, attr, func, arg);
|
|
}
|
|
|
|
#endif
|
|
|
|
#if ARCH(Intel) && WSIZE(32)
|
|
static int
|
|
__collector_pthread_create_symver (int(real_pthread_create) (),
|
|
pthread_t *thread,
|
|
const pthread_attr_t *attr,
|
|
void *(*func)(void*),
|
|
void *arg)
|
|
#else
|
|
int
|
|
pthread_create (pthread_t *thread, const pthread_attr_t *attr,
|
|
void *(*func)(void*), void *arg)
|
|
#endif
|
|
{
|
|
if (NULL_PTR (pthread_create))
|
|
init_interposition_intf ();
|
|
|
|
TprintfT (DBG_LT1, "pthread_create interposition called\n");
|
|
|
|
if (dispatch_mode != DISPATCH_ON)
|
|
{
|
|
#if ARCH(Intel) && WSIZE(32)
|
|
return (real_pthread_create) (thread, attr, func, arg);
|
|
#else
|
|
return CALL_REAL (pthread_create)(thread, attr, func, arg);
|
|
#endif
|
|
}
|
|
CollectorArgs *cargs = __collector_allocCSize (__collector_heap, sizeof (CollectorArgs), 1);
|
|
|
|
if (cargs == NULL)
|
|
{
|
|
#if ARCH(Intel) && WSIZE(32)
|
|
return (real_pthread_create) (thread, attr, func, arg);
|
|
#else
|
|
return CALL_REAL (pthread_create)(thread, attr, func, arg);
|
|
#endif
|
|
}
|
|
cargs->func = func;
|
|
cargs->arg = arg;
|
|
cargs->stack = NULL;
|
|
cargs->isPthread = 1;
|
|
int ret = -1;
|
|
#if ARCH(Intel) && WSIZE(32)
|
|
ret = (real_pthread_create) (thread, attr, &collector_root, cargs);
|
|
#else
|
|
ret = CALL_REAL (pthread_create)(thread, attr, &collector_root, cargs);
|
|
#endif
|
|
if (ret)
|
|
__collector_freeCSize (__collector_heap, cargs, sizeof (CollectorArgs));
|
|
TprintfT (DBG_LT1, "pthread_create returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
__collector_ext_clone_pthread (int (*fn)(void *), void *child_stack, int flags, void *arg,
|
|
va_list va /* pid_t *ptid, struct user_desc *tls, pid_t *" ctid" */)
|
|
{
|
|
if (NULL_PTR (clone))
|
|
init_interposition_intf ();
|
|
TprintfT (0, "clone thread interposing\n");
|
|
pid_t * ptid = NULL;
|
|
struct user_desc * tls = NULL;
|
|
pid_t * ctid = NULL;
|
|
int num_args = 0;
|
|
if (flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID))
|
|
{
|
|
ptid = va_arg (va, pid_t *);
|
|
tls = va_arg (va, struct user_desc*);
|
|
ctid = va_arg (va, pid_t *);
|
|
num_args = 3;
|
|
}
|
|
else if (flags & CLONE_SETTLS)
|
|
{
|
|
ptid = va_arg (va, pid_t *);
|
|
tls = va_arg (va, struct user_desc*);
|
|
num_args = 2;
|
|
}
|
|
else if (flags & CLONE_PARENT_SETTID)
|
|
{
|
|
ptid = va_arg (va, pid_t *);
|
|
num_args = 1;
|
|
}
|
|
int ret = 0;
|
|
if (dispatch_mode != DISPATCH_ON)
|
|
{
|
|
switch (num_args)
|
|
{
|
|
case 3:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg, ptid, tls, ctid);
|
|
break;
|
|
case 2:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg, ptid, tls);
|
|
break;
|
|
case 1:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg, ptid);
|
|
break;
|
|
default:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
CollectorArgs *cargs = __collector_allocCSize (__collector_heap, sizeof (CollectorArgs), 1);
|
|
if (cargs == NULL)
|
|
{
|
|
switch (num_args)
|
|
{
|
|
case 3:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg, ptid, tls, ctid);
|
|
break;
|
|
case 2:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg, ptid, tls);
|
|
break;
|
|
case 1:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg, ptid);
|
|
break;
|
|
default:
|
|
ret = CALL_REAL (clone)(fn, child_stack, flags, arg);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
cargs->func = (void *(*)(void*))fn;
|
|
cargs->arg = arg;
|
|
cargs->stack = child_stack;
|
|
cargs->isPthread = 0;
|
|
|
|
switch (num_args)
|
|
{
|
|
case 3:
|
|
ret = CALL_REAL (clone)((int(*)(void*))collector_root, child_stack, flags, cargs, ptid, tls, ctid);
|
|
break;
|
|
case 2:
|
|
ret = CALL_REAL (clone)((int(*)(void*))collector_root, child_stack, flags, cargs, ptid, tls);
|
|
break;
|
|
case 1:
|
|
ret = CALL_REAL (clone)((int(*)(void*))collector_root, child_stack, flags, cargs, ptid);
|
|
break;
|
|
default:
|
|
ret = CALL_REAL (clone)((int(*)(void*))collector_root, child_stack, flags, cargs);
|
|
break;
|
|
}
|
|
|
|
if (ret < 0)
|
|
__collector_freeCSize (__collector_heap, cargs, sizeof (CollectorArgs));
|
|
TprintfT (DBG_LT1, "clone thread returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
// weak symbols:
|
|
int sigprocmask () __attribute__ ((weak, alias ("__collector_sigprocmask")));
|
|
int thr_sigsetmask () __attribute__ ((weak, alias ("__collector_thr_sigsetmask")));
|
|
int setitimer () __attribute__ ((weak, alias ("_setitimer")));
|