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Update Zygisk logging

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This commit is contained in:
topjohnwu 2021-10-14 02:13:23 -07:00
parent b75ec09998
commit b0198dab6c
3 changed files with 35 additions and 25 deletions
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6
native/jni/zygisk/entry.cpp
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@ -29,7 +29,7 @@ static void zygisk_logging() {
}
void self_unload() {
LOGD("zygisk: Request to self unload\n");
ZLOGD("Request to self unload\n");
// If unhooking failed, do not unload or else it will cause SIGSEGV
if (!unhook_functions())
return;
@ -78,7 +78,7 @@ static void second_stage_entry(void *handle, char *path) {
unsetenv(SECOND_STAGE_PTR);
zygisk_logging();
LOGD("zygisk: inject 2nd stage\n");
ZLOGD("inject 2nd stage\n");
hook_functions();
// Register signal handler to unload 1st stage
@ -100,7 +100,7 @@ static void second_stage_entry(void *handle, char *path) {
static void first_stage_entry() {
android_logging();
LOGD("zygisk: inject 1st stage\n");
ZLOGD("inject 1st stage\n");
char *ld = getenv("LD_PRELOAD");
char *path;

44
native/jni/zygisk/hook.cpp
View File

@ -16,8 +16,8 @@ using jni_hook::tree_map;
using xstring = jni_hook::string;
// Extreme verbose logging
#define VLOG(...) LOGD(__VA_ARGS__)
//#define VLOG(...)
#define ZLOGV(...) ZLOGD(__VA_ARGS__)
//#define ZLOGV(...)
namespace {
@ -83,7 +83,7 @@ if (methods[i].name == #method##sv) { \
jni_hook_list->try_emplace(className).first->second.push_back(methods[i]); \
method##_orig = methods[i].fnPtr; \
newMethods[i] = method##_methods[j]; \
LOGI("zygisk: replaced %s#" #method "\n", className); \
ZLOGI("replaced %s#" #method "\n", className); \
--hook_cnt; \
break; \
} \
@ -122,14 +122,14 @@ ret new_##func(__VA_ARGS__)
jint env_RegisterNatives(
JNIEnv *env, jclass clazz, const JNINativeMethod *methods, jint numMethods) {
auto className = get_class_name(env, clazz);
VLOG("zygisk: JNIEnv->RegisterNatives [%s]\n", className.data());
ZLOGV("JNIEnv->RegisterNatives [%s]\n", className.data());
auto newMethods = hookAndSaveJNIMethods(className.data(), methods, numMethods);
return old_functions->RegisterNatives(env, clazz, newMethods.get() ?: methods, numMethods);
}
DCL_HOOK_FUNC(int, jniRegisterNativeMethods,
JNIEnv *env, const char *className, const JNINativeMethod *methods, int numMethods) {
VLOG("zygisk: jniRegisterNativeMethods [%s]\n", className);
ZLOGV("jniRegisterNativeMethods [%s]\n", className);
auto newMethods = hookAndSaveJNIMethods(className, methods, numMethods);
return old_jniRegisterNativeMethods(env, className, newMethods.get() ?: methods, numMethods);
}
@ -144,7 +144,7 @@ DCL_HOOK_FUNC(int, selinux_android_setcontext,
uid_t uid, int isSystemServer, const char *seinfo, const char *pkgname) {
if (g_ctx && g_ctx->flags[UNMOUNT_FLAG]) {
if (remote_request_unmount() == 0) {
LOGD("zygisk: mount namespace cleaned up\n");
ZLOGD("mount namespace cleaned up\n");
}
}
return old_selinux_android_setcontext(uid, isSystemServer, seinfo, pkgname);
@ -167,7 +167,7 @@ void **gAppRuntimeVTable;
// This method is a trampoline for hooking JNIEnv->RegisterNatives
void onVmCreated(void *self, JNIEnv* env) {
LOGD("zygisk: AppRuntime::onVmCreated\n");
ZLOGD("AppRuntime::onVmCreated\n");
// Restore virtual table
auto new_table = *reinterpret_cast<void***>(self);
@ -199,7 +199,7 @@ DCL_HOOK_FUNC(void, setArgv0, void *self, const char *argv0, bool setProcName) {
return;
}
LOGD("zygisk: AndroidRuntime::setArgv0\n");
ZLOGD("AndroidRuntime::setArgv0\n");
// We don't know which entry is onVmCreated, so overwrite every one
// We also don't know the size of the vtable, but 8 is more than enough
@ -347,14 +347,14 @@ void HookContext::nativeSpecializeAppProcess_pre() {
flags[APP_SPECIALIZE] = true;
process = env->GetStringUTFChars(args->nice_name, nullptr);
if (flags[FORK_AND_SPECIALIZE]) {
VLOG("zygisk: pre forkAndSpecialize [%s]\n", process);
ZLOGV("pre forkAndSpecialize [%s]\n", process);
} else {
VLOG("zygisk: pre specialize [%s]\n", process);
ZLOGV("pre specialize [%s]\n", process);
}
auto module_fds = remote_get_info(args->uid, process, &info);
if (info.on_denylist) {
LOGI("zygisk: [%s] is on the denylist\n", process);
ZLOGI("[%s] is on the denylist\n", process);
toggle_unmount();
} else {
run_modules_pre(module_fds);
@ -363,9 +363,9 @@ void HookContext::nativeSpecializeAppProcess_pre() {
void HookContext::nativeSpecializeAppProcess_post() {
if (flags[FORK_AND_SPECIALIZE]) {
VLOG("zygisk: post forkAndSpecialize [%s]\n", process);
ZLOGV("post forkAndSpecialize [%s]\n", process);
} else {
VLOG("zygisk: post specialize [%s]\n", process);
ZLOGV("post specialize [%s]\n", process);
}
env->ReleaseStringUTFChars(args->nice_name, process);
@ -388,7 +388,7 @@ void HookContext::nativeForkSystemServer_pre() {
fork_pre();
flags[SERVER_SPECIALIZE] = true;
if (pid == 0) {
VLOG("zygisk: pre forkSystemServer\n");
ZLOGV("pre forkSystemServer\n");
run_modules_pre(remote_get_info(1000, "system_server", &info));
close_fds();
}
@ -397,7 +397,7 @@ void HookContext::nativeForkSystemServer_pre() {
void HookContext::nativeForkSystemServer_post() {
if (pid == 0) {
android_logging();
VLOG("zygisk: post forkSystemServer\n");
ZLOGV("post forkSystemServer\n");
run_modules_post();
}
fork_post();
@ -446,10 +446,10 @@ void HookContext::fork_post() {
static bool hook_refresh() {
if (xhook_refresh(0) == 0) {
xhook_clear();
LOGI("zygisk: xhook success\n");
ZLOGI("xhook success\n");
return true;
} else {
LOGE("zygisk: xhook failed\n");
ZLOGE("xhook failed\n");
return false;
}
}
@ -457,7 +457,7 @@ static bool hook_refresh() {
static int hook_register(const char *path, const char *symbol, void *new_func, void **old_func) {
int ret = xhook_register(path, symbol, new_func, old_func);
if (ret != 0) {
LOGE("hook: Failed to register hook \"%s\"\n", symbol);
ZLOGE("Failed to register hook \"%s\"\n", symbol);
return ret;
}
xhook_list->emplace_back(path, symbol, old_func);
@ -495,7 +495,7 @@ void hook_functions() {
xhook_list->end());
if (old_jniRegisterNativeMethods == nullptr) {
LOGD("zygisk: jniRegisterNativeMethods not hooked, using fallback\n");
ZLOGD("jniRegisterNativeMethods not hooked, using fallback\n");
// android::AndroidRuntime::setArgv0(const char*, bool)
XHOOK_REGISTER_SYM(APP_PROCESS, "_ZN7android14AndroidRuntime8setArgv0EPKcb", setArgv0);
@ -530,7 +530,7 @@ bool unhook_functions() {
for (const auto &[clz, methods] : *jni_hook_list) {
if (!methods.empty() && old_jniRegisterNativeMethods(
g_ctx->env, clz.data(), methods.data(), methods.size()) != 0) {
LOGE("zygisk: Failed to restore JNI hook of class [%s]\n", clz.data());
ZLOGE("Failed to restore JNI hook of class [%s]\n", clz.data());
success = false;
}
}
@ -539,13 +539,13 @@ bool unhook_functions() {
// Unhook xhook
for (const auto &[path, sym, old_func] : *xhook_list) {
if (xhook_register(path, sym, *old_func, nullptr) != 0) {
LOGE("zygisk: Failed to register xhook [%s]\n", sym);
ZLOGE("Failed to register xhook [%s]\n", sym);
success = false;
}
}
delete xhook_list;
if (!hook_refresh()) {
LOGE("zygisk: Failed to restore xhook\n");
ZLOGE("Failed to restore xhook\n");
success = false;
}

10
native/jni/zygisk/zygisk.hpp
View File

@ -14,6 +14,16 @@ enum : int {
ZYGISK_GET_LOG_PIPE,
};
#if defined(__LP64__)
#define ZLOGD(...) LOGD("zygisk64: " __VA_ARGS__)
#define ZLOGE(...) LOGE("zygisk64: " __VA_ARGS__)
#define ZLOGI(...) LOGI("zygisk64: " __VA_ARGS__)
#else
#define ZLOGD(...) LOGD("zygisk32: " __VA_ARGS__)
#define ZLOGE(...) LOGE("zygisk32: " __VA_ARGS__)
#define ZLOGI(...) LOGI("zygisk32: " __VA_ARGS__)
#endif
// Unmap all pages matching the name
void unmap_all(const char *name);