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Attempt to redirect signal handler to JVM

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Duy Tran Khanh 2021-06-12 18:50:42 +07:00 committed by GitHub
parent 2f294a9002
commit ad726d1006
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1 changed files with 26 additions and 8 deletions
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34
app_pojavlauncher/src/main/jni/jre_launcher.c
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@ -48,13 +48,22 @@ static const jboolean const_javaw = JNI_FALSE;
static const jboolean const_cpwildcard = JNI_TRUE;
static const jint const_ergo_class = 0; // DEFAULT_POLICY
static struct sigaction old_sa[NSIG];
void (*__old_sa)(int signal, siginfo_t *info, void *reserved);
void android_sigaction(int signal, siginfo_t *info, void *reserved)
{
printf("process killed with signal %d code %p addr %p", signal,info->si_code,info->si_addr);
__old_sa = old_sa[signal].sa_sigaction;
__old_sa(signal,info,reserved);
exit(1);
int (*JVM_handle_linux_signal)(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized);
void android_sigaction(int signal, siginfo_t *info, void *reserved) {
if (JVM_handle_linux_signal == NULL) { // should not happen, but still
printf("process killed with signal %d code %p addr %p", signal,info->si_code,info->si_addr);
__old_sa = old_sa[signal].sa_sigaction;
__old_sa(signal,info,reserved);
exit(1);
} else {
// Based on https://github.com/PojavLauncherTeam/openjdk-multiarch-jdk8u/blob/aarch64-shenandoah-jdk8u272-b10/hotspot/src/os/linux/vm/os_linux.cpp#L4688-4693
int orig_errno = errno; // Preserve errno value over signal handler.
JVM_handle_linux_signal(signal, info, reserved, true);
errno = orig_errno;
}
}
typedef jint JNI_CreateJavaVM_func(JavaVM **pvm, void **penv, void *args);
@ -117,21 +126,30 @@ static jint launchJVM(int margc, char** margv) {
* Signature: ([Ljava/lang/String;)I
*/
JNIEXPORT jint JNICALL Java_com_oracle_dalvik_VMLauncher_launchJVM(JNIEnv *env, jclass clazz, jobjectArray argsArray) {
void* libjvm = dlopen("libjvm.so", RTLD_LAZY | RTLD_GLOBAL);
if (NULL == libjvm) {
LOGE("JVM lib = NULL: %s", dlerror());
return -1;
}
JVM_handle_linux_signal = dlsym(libjvm, "JVM_handle_linux_signal");
jint res = 0;
// int i;
//Prepare the signal trapper
struct sigaction catcher;
memset(&catcher,0,sizeof(sigaction));
catcher.sa_sigaction = android_sigaction;
catcher.sa_flags = SA_RESETHAND;
catcher.sa_flags = SA_SIGINFO|SA_RESTART;
// SA_RESETHAND;
#define CATCHSIG(X) sigaction(X, &catcher, &old_sa[X])
CATCHSIG(SIGILL);
CATCHSIG(SIGABRT);
CATCHSIG(SIGBUS);
CATCHSIG(SIGFPE);
//CATCHSIG(SIGSEGV);
CATCHSIG(SIGSEGV);
CATCHSIG(SIGSTKFLT);
CATCHSIG(SIGPIPE);
CATCHSIG(SIGXFSZ);
//Signal trapper ready
// Save dalvik JNIEnv pointer for JVM launch thread