mirror of
https://github.com/mauiaaron/apple2.git
synced 2024-06-26 00:29:27 +00:00
131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
/*
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* Apple // emulator for *nix
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*
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* This software package is subject to the GNU General Public License
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* version 2 or later (your choice) as published by the Free Software
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* Foundation.
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*
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* THERE ARE NO WARRANTIES WHATSOEVER.
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*
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*/
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#include "common.h"
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// Keep these in sync with the Java side
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enum {
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CRASH_JAVA=0,
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CRASH_NULL_DEREF,
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CRASH_STACKCALL_OVERFLOW,
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CRASH_STACKBUF_OVERFLOW,
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// MOAR!
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};
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#include <jni.h>
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static volatile int __attribute__((noinline)) _crash_null_deref(void) {
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static volatile uintptr_t *ptr = NULL;
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while ((ptr+1)) {
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*ptr++ = 0xAA;
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}
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return (int)ptr[0];
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}
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static volatile int (*funPtr0)(void) = NULL;
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static volatile int __attribute__((noinline)) _crash_stackcall_overflow(void) {
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if (funPtr0) {
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funPtr0();
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funPtr0 = NULL;
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} else {
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funPtr0 = &_crash_stackcall_overflow;
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funPtr0();
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}
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return getpid();
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}
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static volatile int (*funPtr1)(unsigned int) = NULL;
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static volatile int __attribute__((noinline)) _crash_stackbuf_overflow0(unsigned int smashSize) {
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volatile char buf[32];
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memset((char *)buf, 0x55, smashSize);
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return (int)&buf[0];
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}
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static volatile int __attribute__((noinline)) _crash_stackbuf_overflow(void) {
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static volatile unsigned int smashSize = 0;
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while (1) {
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if (funPtr1) {
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funPtr1(smashSize);
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funPtr1 = NULL;
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} else {
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funPtr1 = &_crash_stackbuf_overflow0;
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funPtr1(smashSize);
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}
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smashSize += 32;
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if (!smashSize) {
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break;
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}
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}
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return getpid();
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}
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void Java_org_deadc0de_apple2ix_Apple2CrashHandler_nativePerformCrash(JNIEnv *env, jclass cls, jint crashType) {
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#warning FIXME TODO ... we should turn off test codepaths in release build =D
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LOG("... performing crash of type : %d", crashType);
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switch (crashType) {
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case CRASH_NULL_DEREF:
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_crash_null_deref();
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break;
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case CRASH_STACKCALL_OVERFLOW:
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_crash_stackcall_overflow();
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break;
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case CRASH_STACKBUF_OVERFLOW:
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_crash_stackbuf_overflow();
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break;
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default:
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// unknown crasher, just abort ...
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abort();
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break;
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}
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}
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#define _JAVA_CRASH_NAME "/jcrash.txt" // this should match the Java side
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#define _HALF_PAGE_SIZE (PAGE_SIZE>>1)
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void Java_org_deadc0de_apple2ix_Apple2CrashHandler_nativeOnUncaughtException(JNIEnv *env, jclass cls, jstring jhome, jstring jstr) {
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RELEASE_ERRLOG("Uncaught Java Exception ...");
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// Write to /data/data/org.deadc0de.apple2ix.basic/jcrash.txt
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const char *home = (*env)->GetStringUTFChars(env, jhome, NULL);
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char *q = (char *)home;
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char buf[_HALF_PAGE_SIZE] = { 0 };
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const char *p0 = &buf[0];
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char *p = (char *)p0;
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while (*q && (p-p0 < _HALF_PAGE_SIZE-1)) {
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*p++ = *q++;
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}
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(*env)->ReleaseStringUTFChars(env, jhome, home);
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q = &_JAVA_CRASH_NAME[0];
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while (*q && (p-p0 < _HALF_PAGE_SIZE-1)) {
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*p++ = *q++;
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}
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int fd = TEMP_FAILURE_RETRY(open(buf, (O_CREAT|O_APPEND|O_WRONLY), (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)));
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if (fd == -1) {
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RELEASE_ERRLOG("OOPS, could not create/write to java crash file");
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return;
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}
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const char *str = (*env)->GetStringUTFChars(env, jstr, NULL);
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jsize len = (*env)->GetStringUTFLength(env, jstr);
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TEMP_FAILURE_RETRY(write(fd, str, len));
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(*env)->ReleaseStringUTFChars(env, jstr, str);
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TEMP_FAILURE_RETRY(fsync(fd));
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TEMP_FAILURE_RETRY(close(fd));
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}
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