diff options
Diffstat (limited to 'lib/libsysdecode/utrace.c')
| -rw-r--r-- | lib/libsysdecode/utrace.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/lib/libsysdecode/utrace.c b/lib/libsysdecode/utrace.c new file mode 100644 index 000000000000..67ba86bfbf7b --- /dev/null +++ b/lib/libsysdecode/utrace.c @@ -0,0 +1,211 @@ +/*- + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <dlfcn.h> +#include <stdbool.h> +#include <stdio.h> +#include <string.h> +#include <sysdecode.h> +#include "rtld_utrace.h" + +#ifdef __LP64__ +struct utrace_rtld32 { + char sig[4]; + int event; + uint32_t handle; + uint32_t mapbase; + uint32_t mapsize; + int refcnt; + char name[MAXPATHLEN]; +}; +#endif + +static int +print_utrace_rtld(FILE *fp, void *p) +{ + struct utrace_rtld *ut = p; + void *parent; + int mode; + + switch (ut->event) { + case UTRACE_DLOPEN_START: + mode = ut->refcnt; + fprintf(fp, "dlopen(%s, ", ut->name); + switch (mode & RTLD_MODEMASK) { + case RTLD_NOW: + fprintf(fp, "RTLD_NOW"); + break; + case RTLD_LAZY: + fprintf(fp, "RTLD_LAZY"); + break; + default: + fprintf(fp, "%#x", mode & RTLD_MODEMASK); + } + if (mode & RTLD_GLOBAL) + fprintf(fp, " | RTLD_GLOBAL"); + if (mode & RTLD_TRACE) + fprintf(fp, " | RTLD_TRACE"); + if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE)) + fprintf(fp, " | %#x", mode & + ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE)); + fprintf(fp, ")"); + break; + case UTRACE_DLOPEN_STOP: + fprintf(fp, "%p = dlopen(%s) ref %d", ut->handle, ut->name, + ut->refcnt); + break; + case UTRACE_DLCLOSE_START: + fprintf(fp, "dlclose(%p) (%s, %d)", ut->handle, ut->name, + ut->refcnt); + break; + case UTRACE_DLCLOSE_STOP: + fprintf(fp, "dlclose(%p) finished", ut->handle); + break; + case UTRACE_LOAD_OBJECT: + fprintf(fp, "RTLD: loaded %p @ %p - %p (%s)", ut->handle, + ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1, + ut->name); + break; + case UTRACE_UNLOAD_OBJECT: + fprintf(fp, "RTLD: unloaded %p @ %p - %p (%s)", ut->handle, + ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1, + ut->name); + break; + case UTRACE_ADD_RUNDEP: + parent = ut->mapbase; + fprintf(fp, "RTLD: %p now depends on %p (%s, %d)", parent, + ut->handle, ut->name, ut->refcnt); + break; + case UTRACE_PRELOAD_FINISHED: + fprintf(fp, "RTLD: LD_PRELOAD finished"); + break; + case UTRACE_INIT_CALL: + fprintf(fp, "RTLD: init %p for %p (%s)", ut->mapbase, ut->handle, + ut->name); + break; + case UTRACE_FINI_CALL: + fprintf(fp, "RTLD: fini %p for %p (%s)", ut->mapbase, ut->handle, + ut->name); + break; + case UTRACE_DLSYM_START: + fprintf(fp, "RTLD: dlsym(%p, %s)", ut->handle, ut->name); + break; + case UTRACE_DLSYM_STOP: + fprintf(fp, "RTLD: %p = dlsym(%p, %s)", ut->mapbase, ut->handle, + ut->name); + break; + case UTRACE_RTLD_ERROR: + fprintf(fp, "RTLD: error: %s\n", ut->name); + break; + + default: + return (0); + } + return (1); +} + +struct utrace_malloc { + void *p; + size_t s; + void *r; +}; + +#ifdef __LP64__ +struct utrace_malloc32 { + uint32_t p; + uint32_t s; + uint32_t r; +}; +#endif + +static void +print_utrace_malloc(FILE *fp, void *p) +{ + struct utrace_malloc *ut = p; + + if (ut->p == (void *)(intptr_t)(-1)) + fprintf(fp, "malloc_init()"); + else if (ut->s == 0) + fprintf(fp, "free(%p)", ut->p); + else if (ut->p == NULL) + fprintf(fp, "%p = malloc(%zu)", ut->r, ut->s); + else + fprintf(fp, "%p = realloc(%p, %zu)", ut->r, ut->p, ut->s); +} + +int +sysdecode_utrace(FILE *fp, void *p, size_t len) +{ +#ifdef __LP64__ + struct utrace_rtld ur; + struct utrace_rtld32 *pr; + struct utrace_malloc um; + struct utrace_malloc32 *pm; +#endif + static const char rtld_utrace_sig[RTLD_UTRACE_SIG_SZ] = RTLD_UTRACE_SIG; + + if (len == sizeof(struct utrace_rtld) && bcmp(p, rtld_utrace_sig, + sizeof(rtld_utrace_sig)) == 0) + return (print_utrace_rtld(fp, p)); + + if (len == sizeof(struct utrace_malloc)) { + print_utrace_malloc(fp, p); + return (1); + } + +#ifdef __LP64__ + if (len == sizeof(struct utrace_rtld32) && bcmp(p, rtld_utrace_sig, + sizeof(rtld_utrace_sig)) == 0) { + pr = p; + memset(&ur, 0, sizeof(ur)); + memcpy(ur.sig, pr->sig, sizeof(ur.sig)); + ur.event = pr->event; + ur.handle = (void *)(uintptr_t)pr->handle; + ur.mapbase = (void *)(uintptr_t)pr->mapbase; + ur.mapsize = pr->mapsize; + ur.refcnt = pr->refcnt; + memcpy(ur.name, pr->name, sizeof(ur.name)); + return (print_utrace_rtld(fp, &ur)); + } + + if (len == sizeof(struct utrace_malloc32)) { + pm = p; + memset(&um, 0, sizeof(um)); + um.p = pm->p == (uint32_t)-1 ? (void *)(intptr_t)-1 : + (void *)(uintptr_t)pm->p; + um.s = pm->s; + um.r = (void *)(uintptr_t)pm->r; + print_utrace_malloc(fp, &um); + return (1); + } +#endif + + return (0); +} |