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Add preliminary zygote code injection support

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Prototyping the injection setup and a clean "self unloading" mechanism.
This commit is contained in:
topjohnwu
2021-01-06 22:21:17 -08:00
parent cd23d27048
commit 4060c2107c
13 changed files with 281 additions and 102 deletions
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10
native/jni/utils/misc.cpp
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@ -113,12 +113,12 @@ int exec_command_sync(exec_t &exec) {
return WEXITSTATUS(status);
}
int new_daemon_thread(thread_entry entry, void *arg, const pthread_attr_t *attr) {
int new_daemon_thread(thread_entry entry, void *arg) {
pthread_t thread;
int ret = xpthread_create(&thread, attr, entry, arg);
if (ret == 0)
pthread_detach(thread);
return ret;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
return xpthread_create(&thread, &attr, entry, arg);
}
static void *proxy_routine(void *fp) {

2
native/jni/utils/misc.hpp
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@ -59,7 +59,7 @@ static inline int parse_int(const std::string &s) { return parse_int(s.data());
static inline int parse_int(std::string_view s) { return parse_int(s.data()); }
using thread_entry = void *(*)(void *);
int new_daemon_thread(thread_entry entry, void *arg = nullptr, const pthread_attr_t *attr = nullptr);
int new_daemon_thread(thread_entry entry, void *arg = nullptr);
int new_daemon_thread(std::function<void()> &&entry);
static inline bool str_contains(std::string_view s, std::string_view ss) {

1
native/jni/utils/xwrap.hpp
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@ -64,3 +64,4 @@ long xptrace(int request, pid_t pid, void *addr = nullptr, void *data = nullptr)
static inline long xptrace(int request, pid_t pid, void *addr, uintptr_t data) {
return xptrace(request, pid, addr, reinterpret_cast<void *>(data));
}
#define WEVENT(s) (((s) & 0xffff0000) >> 16)