1 files changed, 0 insertions, 225 deletions
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;
-}