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-rw-r--r--trace/preload.c80
-rw-r--r--trace/trace.c225
2 files changed, 0 insertions, 305 deletions
diff --git a/trace/preload.c b/trace/preload.c
deleted file mode 100644
index 99dd906..0000000
--- a/trace/preload.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#define _GNU_SOURCE
-#include <sys/ptrace.h>
-#include <sys/types.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <dlfcn.h>
-
-#include "../preload.h"
-
-#define ERROR(fmt, ...) do { \
- fprintf(stderr,"perload-jail: "fmt, ## __VA_ARGS__); \
- } while (0)
-
-static main_t __main__;
-
-static int __preload_main__(int argc, char **argv, char **envp)
-{
- unsetenv("LD_PRELOAD");
- ptrace(PTRACE_TRACEME);
- kill(getpid(), SIGSTOP);
-
- return (*__main__)(argc, argv, envp);
-}
-
-int __libc_start_main(main_t main,
- int argc,
- char **argv,
- ElfW(auxv_t) *auxvec,
- __typeof (main) init,
- void (*fini) (void),
- void (*rtld_fini) (void),
- void *stack_end)
-{
- start_main_t __start_main__;
-
- __start_main__ = dlsym(RTLD_NEXT, "__libc_start_main");
- if (!__start_main__)
- ERROR("failed to find __libc_start_main %s\n", dlerror());
-
- __main__ = main;
-
- return (*__start_main__)(__preload_main__, argc, argv, auxvec,
- init, fini, rtld_fini, stack_end);
-}
-
-void __uClibc_main(main_t main,
- int argc,
- char **argv,
- void (*app_init)(void),
- void (*app_fini)(void),
- void (*rtld_fini)(void),
- void *stack_end attribute_unused)
-{
- uClibc_main __start_main__;
-
- __start_main__ = dlsym(RTLD_NEXT, "__uClibc_main");
- if (!__start_main__)
- ERROR("failed to find __uClibc_main %s\n", dlerror());
-
- __main__ = main;
-
- return (*__start_main__)(__preload_main__, argc, argv,
- app_init, app_fini, rtld_fini, stack_end);
-}
diff --git a/trace/trace.c b/trace/trace.c
deleted file mode 100644
index b0005b8..0000000
--- a/trace/trace.c
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#define _GNU_SOURCE
-#include <stddef.h>
-#include <sys/ptrace.h>
-#include <sys/types.h>
-#include <sys/user.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <syslog.h>
-
-#include <libubox/uloop.h>
-#include <libubox/blobmsg.h>
-#include <libubox/blobmsg_json.h>
-
-#include "../syscall-names.h"
-
-#define _offsetof(a, b) __builtin_offsetof(a,b)
-#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
-
-#ifdef __amd64__
-#define reg_syscall_nr _offsetof(struct user, regs.orig_rax)
-#elif defined(__i386__)
-#define reg_syscall_nr _offsetof(struct user, regs.orig_eax)
-#elif defined(__mips)
-# ifndef EF_REG2
-# define EF_REG2 8
-# endif
-#define reg_syscall_nr (EF_REG2 / 4)
-#elif defined(__arm__)
-#define reg_syscall_nr _offsetof(struct user, regs.uregs[7])
-#else
-#error tracing is not supported on this architecture
-#endif
-
-#define INFO(fmt, ...) do { \
- fprintf(stderr, "utrace: "fmt, ## __VA_ARGS__); \
-} while (0)
-
-#define ERROR(fmt, ...) do { \
- syslog(LOG_ERR, "utrace: "fmt, ## __VA_ARGS__); \
- fprintf(stderr, "utrace: "fmt, ## __VA_ARGS__); \
-} while (0)
-
-static struct uloop_process tracer;
-static int *syscall_count;
-static struct blob_buf b;
-static int syscall_max;
-static int in_syscall;
-static int debug;
-
-static int max_syscall = ARRAY_SIZE(syscall_names);
-
-static void set_syscall(const char *name, int val)
-{
- int i;
-
- for (i = 0; i < max_syscall; i++)
- if (syscall_names[i] && !strcmp(syscall_names[i], name)) {
- syscall_count[i] = val;
- return;
- }
-}
-
-static void print_syscalls(int policy, const char *json)
-{
- void *c;
- int i;
-
- set_syscall("rt_sigaction", 1);
- set_syscall("sigreturn", 1);
- set_syscall("rt_sigreturn", 1);
- set_syscall("exit_group", 1);
- set_syscall("exit", 1);
-
- blob_buf_init(&b, 0);
- c = blobmsg_open_array(&b, "whitelist");
-
- for (i = 0; i < ARRAY_SIZE(syscall_names); i++) {
- if (!syscall_count[i])
- continue;
- if (syscall_names[i]) {
- if (debug)
- printf("syscall %d (%s) was called %d times\n",
- i, syscall_names[i], syscall_count[i]);
- blobmsg_add_string(&b, NULL, syscall_names[i]);
- } else {
- ERROR("no name found for syscall(%d)\n", i);
- }
- }
- blobmsg_close_array(&b, c);
- blobmsg_add_u32(&b, "policy", policy);
- if (json) {
- FILE *fp = fopen(json, "w");
- if (fp) {
- fprintf(fp, "%s", blobmsg_format_json_indent(b.head, true, 0));
- fclose(fp);
- INFO("saving syscall trace to %s\n", json);
- } else {
- ERROR("failed to open %s\n", json);
- }
- } else {
- printf("%s\n",
- blobmsg_format_json_indent(b.head, true, 0));
- }
-
-}
-
-static void tracer_cb(struct uloop_process *c, int ret)
-{
- if (WIFSTOPPED(ret) && WSTOPSIG(ret) & 0x80) {
- if (!in_syscall) {
- int syscall = ptrace(PTRACE_PEEKUSER, c->pid, reg_syscall_nr);
-
- if (syscall < syscall_max) {
- syscall_count[syscall]++;
- if (debug)
- fprintf(stderr, "%s()\n", syscall_names[syscall]);
- } else if (debug) {
- fprintf(stderr, "syscal(%d)\n", syscall);
- }
- }
- in_syscall = !in_syscall;
- } else if (WIFEXITED(ret)) {
- uloop_end();
- return;
- }
- ptrace(PTRACE_SYSCALL, c->pid, 0, 0);
- uloop_process_add(&tracer);
-}
-
-int main(int argc, char **argv, char **envp)
-{
- char *json = NULL;
- int status, ch, policy = EPERM;
- pid_t child;
-
- while ((ch = getopt(argc, argv, "f:p:")) != -1) {
- switch (ch) {
- case 'f':
- json = optarg;
- break;
- case 'p':
- policy = atoi(optarg);
- break;
- }
- }
-
- argc -= optind;
- argv += optind;
-
- if (!argc)
- return -1;
-
- if (getenv("TRACE_DEBUG"))
- debug = 1;
- unsetenv("TRACE_DEBUG");
-
- child = fork();
-
- if (child == 0) {
- char **_argv = calloc(argc + 1, sizeof(char *));
- char **_envp;
- char preload[] = "LD_PRELOAD=/lib/libpreload-trace.so";
- int envc = 1;
- int ret;
-
- memcpy(_argv, argv, argc * sizeof(char *));
-
- while (envp[envc++])
- ;
-
- _envp = calloc(envc, sizeof(char *));
- memcpy(&_envp[1], _envp, envc * sizeof(char *));
- *envp = preload;
-
- ret = execve(_argv[0], _argv, envp);
- ERROR("failed to exec %s: %s\n", _argv[0], strerror(errno));
- return ret;
- }
-
- if (child < 0)
- return -1;
-
- syscall_max = ARRAY_SIZE(syscall_names);
- syscall_count = calloc(syscall_max, sizeof(int));
- waitpid(child, &status, 0);
- if (!WIFSTOPPED(status)) {
- ERROR("failed to start %s\n", *argv);
- return -1;
- }
-
- ptrace(PTRACE_SETOPTIONS, child, 0, PTRACE_O_TRACESYSGOOD);
- ptrace(PTRACE_SYSCALL, child, 0, 0);
-
- uloop_init();
- tracer.pid = child;
- tracer.cb = tracer_cb;
- uloop_process_add(&tracer);
- uloop_run();
- uloop_done();
-
- if (!json)
- if (asprintf(&json, "/tmp/%s.%u.json", basename(*argv), child) < 0)
- ERROR("failed to allocate output path: %s\n", strerror(errno));
-
- print_syscalls(policy, json);
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 07:00:37 +0100