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refine tracing logic

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This commit is contained in:
5ec1cff
2023-11-13 21:51:37 +08:00
parent fd6a454275
commit fd9f8799a1
4 changed files with 17 additions and 27 deletions
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20
loader/src/ptracer/ptracer.cpp
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@@ -68,10 +68,7 @@ bool inject_on_main(int pid, const char *lib_path) {
if (!write_proc(pid, (uintptr_t *) addr_of_entry_addr, &break_addr, sizeof(break_addr))) return false;
ptrace(PTRACE_CONT, pid, 0, 0);
int status;
if (waitpid(pid, &status, __WALL) == -1) {
PLOGE("wait");
return false;
}
wait_for_trace(pid, &status, __WALL);
if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGSEGV) {
if (!get_regs(pid, regs)) return false;
if ((regs.REG_IP & ~1) != (break_addr & ~1)) {
@@ -156,19 +153,6 @@ bool inject_on_main(int pid, const char *lib_path) {
if (!set_regs(pid, backup)) return false;
return true;
/*
ptrace(PTRACE_CONT, pid, 0, 0);
waitpid(pid, &status, __WALL);
if (WIFSTOPPED(status)) {
siginfo_t siginfo;
ptrace(PTRACE_GETSIGINFO, pid, 0, &siginfo);
LOGD("process stopped by signal %d %s si_code=%d si_addr=%p", WSTOPSIG(status),
strsignal(WSTOPSIG(status)), siginfo.si_code, siginfo.si_addr);
pause();
} else {
LOGD("other reason %d", status);
}*/
} else {
LOGE("stopped by other reason: %s", parse_status(status).c_str());
}
@@ -179,7 +163,7 @@ bool inject_on_main(int pid, const char *lib_path) {
bool trace_zygote(int pid) {
LOGI("start tracing %d", pid);
#define WAIT_OR_DIE if (wait_pid(pid, &status, __WALL) != pid) return false;
#define WAIT_OR_DIE wait_for_trace(pid, &status, __WALL);
#define CONT_OR_DIE \
if (ptrace(PTRACE_CONT, pid, 0, 0) == -1) { \
PLOGE("cont"); \