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init monitor

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This commit is contained in:
5ec1cff
2023-11-12 20:34:45 +08:00
parent ba8c313122
commit 040643337d
14 changed files with 389 additions and 442 deletions
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40
loader/src/ptracer/ptracer.cpp
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@@ -145,7 +145,7 @@ bool inject_on_main(int pid, const char *lib_path) {
LOGD("other reason %d", status);
}*/
} else {
LOGE("stopped by other reason: %d", status);
LOGE("stopped by other reason: %s", parse_status(status).c_str());
}
return false;
}
@@ -153,6 +153,7 @@ bool inject_on_main(int pid, const char *lib_path) {
#define STOPPED_WITH(sig, event) (WIFSTOPPED(status) && WSTOPSIG(status) == (sig) && (status >> 16) == (event))
bool trace_zygote(int pid) {
LOGI("start tracing %d", pid);
#define WAIT_OR_DIE if (wait_pid(pid, &status, __WALL) != pid) return false;
#define CONT_OR_DIE \
if (ptrace(PTRACE_CONT, pid, 0, 0) == -1) { \
@@ -161,20 +162,17 @@ bool trace_zygote(int pid) {
}
int status;
LOGI("tracing %d (tracer %d)", pid, getpid());
if (ptrace(PTRACE_SEIZE, pid, 0, PTRACE_O_TRACEEXEC) == -1) {
if (ptrace(PTRACE_SEIZE, pid, 0, 0) == -1) {
PLOGE("seize");
return false;
}
struct finally {
int pid;
~finally() {
ptrace(PTRACE_DETACH, pid, 0, 0);
}
} _{pid};
WAIT_OR_DIE
if (STOPPED_WITH(SIGSTOP, PTRACE_EVENT_STOP)) {
// if SIGSTOP is delivered before we seized it
LOGD("process is already stopped");
if (!inject_on_main(pid, "/dev/zygisk/lib" LP_SELECT("", "64") "/libzygisk.so")) {
LOGE("failed to inject");
return false;
}
LOGD("inject done, continue process");
if (kill(pid, SIGCONT)) {
PLOGE("kill");
return false;
@@ -186,30 +184,16 @@ bool trace_zygote(int pid) {
WAIT_OR_DIE
if (STOPPED_WITH(SIGCONT, 0)) {
LOGD("received SIGCONT");
ptrace(PTRACE_CONT, pid, 0, 0);
ptrace(PTRACE_DETACH, pid, 0, SIGCONT);
}
} else {
LOGE("unknown state %s, not SIGTRAP + EVENT_STOP", parse_status(status).c_str());
return false;
}
} else if (STOPPED_WITH(SIGSTOP, 0)) {
// if SIGSTOP is delivered after we seized it
LOGD("process received SIGSTOP, suppress");
CONT_OR_DIE
} else {
LOGE("unknown state %s, neither EVENT_STOP nor SIGSTOP", parse_status(status).c_str());
return false;
}
WAIT_OR_DIE
// enter the app_process
if (STOPPED_WITH(SIGTRAP, PTRACE_EVENT_EXEC)) {
LOGI("app_process exec-ed");
if (!inject_on_main(pid, "/dev/zygisk/lib" LP_SELECT("", "64") "/libzygisk.so")) {
LOGE("failed to inject");
ptrace(PTRACE_DETACH, pid, 0, 0);
return false;
}
} else {
LOGE("unknown status %s", parse_status(status).c_str());
LOGE("unknown state %s, not SIGSTOP + EVENT_STOP", parse_status(status).c_str());
ptrace(PTRACE_DETACH, pid, 0, 0);
return false;
}
return true;