213 lines
5.8 KiB
C
213 lines
5.8 KiB
C
/*-
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <dlfcn.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <sysdecode.h>
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#include "rtld_utrace.h"
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#ifdef __LP64__
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struct utrace_rtld32 {
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char sig[4];
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int event;
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uint32_t handle;
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uint32_t mapbase;
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uint32_t mapsize;
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int refcnt;
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char name[MAXPATHLEN];
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};
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#endif
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static int
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print_utrace_rtld(FILE *fp, void *p)
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{
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struct utrace_rtld *ut = p;
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void *parent;
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int mode;
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switch (ut->event) {
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case UTRACE_DLOPEN_START:
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mode = ut->refcnt;
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fprintf(fp, "dlopen(%s, ", ut->name);
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switch (mode & RTLD_MODEMASK) {
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case RTLD_NOW:
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fprintf(fp, "RTLD_NOW");
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break;
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case RTLD_LAZY:
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fprintf(fp, "RTLD_LAZY");
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break;
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default:
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fprintf(fp, "%#x", mode & RTLD_MODEMASK);
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}
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if (mode & RTLD_GLOBAL)
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fprintf(fp, " | RTLD_GLOBAL");
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if (mode & RTLD_TRACE)
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fprintf(fp, " | RTLD_TRACE");
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if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE))
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fprintf(fp, " | %#x", mode &
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~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE));
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fprintf(fp, ")");
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break;
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case UTRACE_DLOPEN_STOP:
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fprintf(fp, "%p = dlopen(%s) ref %d", ut->handle, ut->name,
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ut->refcnt);
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break;
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case UTRACE_DLCLOSE_START:
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fprintf(fp, "dlclose(%p) (%s, %d)", ut->handle, ut->name,
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ut->refcnt);
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break;
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case UTRACE_DLCLOSE_STOP:
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fprintf(fp, "dlclose(%p) finished", ut->handle);
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break;
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case UTRACE_LOAD_OBJECT:
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fprintf(fp, "RTLD: loaded %p @ %p - %p (%s)", ut->handle,
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ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
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ut->name);
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break;
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case UTRACE_UNLOAD_OBJECT:
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fprintf(fp, "RTLD: unloaded %p @ %p - %p (%s)", ut->handle,
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ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
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ut->name);
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break;
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case UTRACE_ADD_RUNDEP:
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parent = ut->mapbase;
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fprintf(fp, "RTLD: %p now depends on %p (%s, %d)", parent,
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ut->handle, ut->name, ut->refcnt);
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break;
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case UTRACE_PRELOAD_FINISHED:
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fprintf(fp, "RTLD: LD_PRELOAD finished");
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break;
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case UTRACE_INIT_CALL:
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fprintf(fp, "RTLD: init %p for %p (%s)", ut->mapbase, ut->handle,
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ut->name);
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break;
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case UTRACE_FINI_CALL:
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fprintf(fp, "RTLD: fini %p for %p (%s)", ut->mapbase, ut->handle,
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ut->name);
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break;
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case UTRACE_DLSYM_START:
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fprintf(fp, "RTLD: dlsym(%p, %s)", ut->handle, ut->name);
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break;
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case UTRACE_DLSYM_STOP:
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fprintf(fp, "RTLD: %p = dlsym(%p, %s)", ut->mapbase, ut->handle,
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ut->name);
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break;
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case UTRACE_RTLD_ERROR:
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fprintf(fp, "RTLD: error: %s\n", ut->name);
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break;
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default:
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return (0);
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}
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return (1);
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}
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struct utrace_malloc {
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void *p;
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size_t s;
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void *r;
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};
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#ifdef __LP64__
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struct utrace_malloc32 {
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uint32_t p;
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uint32_t s;
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uint32_t r;
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};
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#endif
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static void
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print_utrace_malloc(FILE *fp, void *p)
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{
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struct utrace_malloc *ut = p;
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if (ut->p == (void *)(intptr_t)(-1))
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fprintf(fp, "malloc_init()");
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else if (ut->s == 0)
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fprintf(fp, "free(%p)", ut->p);
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else if (ut->p == NULL)
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fprintf(fp, "%p = malloc(%zu)", ut->r, ut->s);
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else
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fprintf(fp, "%p = realloc(%p, %zu)", ut->r, ut->p, ut->s);
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}
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int
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sysdecode_utrace(FILE *fp, void *p, size_t len)
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{
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#ifdef __LP64__
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struct utrace_rtld ur;
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struct utrace_rtld32 *pr;
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struct utrace_malloc um;
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struct utrace_malloc32 *pm;
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#endif
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static const char rtld_utrace_sig[RTLD_UTRACE_SIG_SZ] = RTLD_UTRACE_SIG;
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if (len == sizeof(struct utrace_rtld) && bcmp(p, rtld_utrace_sig,
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sizeof(rtld_utrace_sig)) == 0)
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return (print_utrace_rtld(fp, p));
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if (len == sizeof(struct utrace_malloc)) {
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print_utrace_malloc(fp, p);
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return (1);
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}
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#ifdef __LP64__
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if (len == sizeof(struct utrace_rtld32) && bcmp(p, rtld_utrace_sig,
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sizeof(rtld_utrace_sig)) == 0) {
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pr = p;
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memset(&ur, 0, sizeof(ur));
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memcpy(ur.sig, pr->sig, sizeof(ur.sig));
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ur.event = pr->event;
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ur.handle = (void *)(uintptr_t)pr->handle;
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ur.mapbase = (void *)(uintptr_t)pr->mapbase;
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ur.mapsize = pr->mapsize;
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ur.refcnt = pr->refcnt;
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memcpy(ur.name, pr->name, sizeof(ur.name));
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return (print_utrace_rtld(fp, &ur));
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}
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if (len == sizeof(struct utrace_malloc32)) {
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pm = p;
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memset(&um, 0, sizeof(um));
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um.p = pm->p == (uint32_t)-1 ? (void *)(intptr_t)-1 :
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(void *)(uintptr_t)pm->p;
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um.s = pm->s;
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um.r = (void *)(uintptr_t)pm->r;
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print_utrace_malloc(fp, &um);
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return (1);
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}
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#endif
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return (0);
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}
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