120 lines
4.3 KiB
C++
120 lines
4.3 KiB
C++
/*
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* This file is part of LSPosed.
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*
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* LSPosed 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 of the License, or
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* (at your option) any later version.
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*
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* LSPosed 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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*
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* You should have received a copy of the GNU General Public License
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* along with LSPosed. If not, see <https://www.gnu.org/licenses/>.
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*
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* Copyright (C) 2023 LSPosed Contributors
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*/
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#include <fcntl.h>
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#include <jni.h>
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#include <string>
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#include <sys/mount.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <sched.h>
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#include "logging.h"
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extern "C"
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JNIEXPORT void JNICALL
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Java_org_lsposed_lspd_service_Dex2OatService_doMountNative(JNIEnv *env, jobject,
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jboolean enabled,
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jstring r32, jstring d32,
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jstring r64, jstring d64) {
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char dex2oat32[PATH_MAX], dex2oat64[PATH_MAX];
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realpath("bin/dex2oat32", dex2oat32);
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realpath("bin/dex2oat64", dex2oat64);
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if (pid_t pid = fork(); pid > 0) { // parent
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waitpid(pid, nullptr, 0);
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} else { // child
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int ns = open("/proc/1/ns/mnt", O_RDONLY);
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setns(ns, CLONE_NEWNS);
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close(ns);
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const char *r32p, *d32p, *r64p, *d64p;
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if (r32) r32p = env->GetStringUTFChars(r32, nullptr);
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if (d32) d32p = env->GetStringUTFChars(d32, nullptr);
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if (r64) r64p = env->GetStringUTFChars(r64, nullptr);
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if (d64) d64p = env->GetStringUTFChars(d64, nullptr);
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if (enabled) {
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LOGI("Enable dex2oat wrapper");
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if (r32) {
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mount(dex2oat32, r32p, nullptr, MS_BIND, nullptr);
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mount(nullptr, r32p, nullptr, MS_BIND | MS_REMOUNT | MS_RDONLY, nullptr);
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}
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if (d32) {
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mount(dex2oat32, d32p, nullptr, MS_BIND, nullptr);
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mount(nullptr, d32p, nullptr, MS_BIND | MS_REMOUNT | MS_RDONLY, nullptr);
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}
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if (r64) {
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mount(dex2oat64, r64p, nullptr, MS_BIND, nullptr);
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mount(nullptr, r64p, nullptr, MS_BIND | MS_REMOUNT | MS_RDONLY, nullptr);
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}
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if (d64) {
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mount(dex2oat64, d64p, nullptr, MS_BIND, nullptr);
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mount(nullptr, d64p, nullptr, MS_BIND | MS_REMOUNT | MS_RDONLY, nullptr);
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}
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execlp("resetprop", "resetprop", "--delete", "dalvik.vm.dex2oat-flags", nullptr);
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} else {
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LOGI("Disable dex2oat wrapper");
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if (r32) umount(r32p);
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if (d32) umount(d32p);
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if (r64) umount(r64p);
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if (d64) umount(d64p);
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execlp("resetprop", "resetprop", "dalvik.vm.dex2oat-flags", "--inline-max-code-units=0",
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nullptr);
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}
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PLOGE("Failed to resetprop");
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exit(1);
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}
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}
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static int setsockcreatecon_raw(const char *context) {
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std::string path = "/proc/self/task/" + std::to_string(gettid()) + "/attr/sockcreate";
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int fd = open(path.c_str(), O_RDWR | O_CLOEXEC);
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if (fd < 0) return -1;
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int ret;
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if (context) {
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do {
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ret = write(fd, context, strlen(context) + 1);
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} while (ret < 0 && errno == EINTR);
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} else {
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do {
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ret = write(fd, nullptr, 0); // clear
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} while (ret < 0 && errno == EINTR);
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}
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close(fd);
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return ret < 0 ? -1 : 0;
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}
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extern "C"
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JNIEXPORT jboolean JNICALL
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Java_org_lsposed_lspd_service_Dex2OatService_setSockCreateContext(JNIEnv *env, jclass,
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jstring contextStr) {
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const char *context = env->GetStringUTFChars(contextStr, nullptr);
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int ret = setsockcreatecon_raw(context);
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env->ReleaseStringUTFChars(contextStr, context);
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return ret == 0;
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}
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extern "C"
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JNIEXPORT jstring JNICALL
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Java_org_lsposed_lspd_service_Dex2OatService_getSockPath(JNIEnv *env, jobject) {
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return env->NewStringUTF("5291374ceda0aef7c5d86cd2a4f6a3ac\0");
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}
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