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double-check to avoid crash (by observation)

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Chasing a rare play-store-reported JNI crash: test for a null ptr in C
and assert/test in Java.
This commit is contained in:
Eric House 2017-05-25 07:10:49 -07:00
parent d584c30a43
commit b6665a15c4
2 changed files with 16 additions and 13 deletions
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2
xwords4/android/app/src/main/java/org/eehouse/android/xw4/GameUtils.java
View file

@ -1141,6 +1141,8 @@ public class GameUtils {
GamePtr gamePtr = loadMakeGame( context, lock ); GamePtr gamePtr = loadMakeGame( context, lock );
if ( null != gamePtr ) { if ( null != gamePtr ) {
Assert.assertTrue( XwJNI.game_hasComms( gamePtr )
|| !BuildConfig.DEBUG );
CommsAddrRec[] addrs = XwJNI.comms_getAddrs( gamePtr ); CommsAddrRec[] addrs = XwJNI.comms_getAddrs( gamePtr );
for ( CommsAddrRec addr : addrs ) { for ( CommsAddrRec addr : addrs ) {
CommsConnTypeSet conTypes = addr.conTypes; CommsConnTypeSet conTypes = addr.conTypes;

3
xwords4/android/jni/xwjni.c
View file

@ -1631,6 +1631,7 @@ Java_org_eehouse_android_xw4_jni_XwJNI_comms_1getAddrs
jobjectArray result = NULL; jobjectArray result = NULL;
XWJNI_START(); XWJNI_START();
XP_ASSERT( state->game.comms ); XP_ASSERT( state->game.comms );
if ( !!state->game.comms ) {
CommsAddrRec addrs[MAX_NUM_PLAYERS]; CommsAddrRec addrs[MAX_NUM_PLAYERS];
XP_U16 count = VSIZE(addrs); XP_U16 count = VSIZE(addrs);
comms_getAddrs( state->game.comms, addrs, &count ); comms_getAddrs( state->game.comms, addrs, &count );
@ -1646,7 +1647,7 @@ Java_org_eehouse_android_xw4_jni_XwJNI_comms_1getAddrs
deleteLocalRef( env, jaddr ); deleteLocalRef( env, jaddr );
} }
deleteLocalRef( env, clas ); deleteLocalRef( env, clas );
}
XWJNI_END(); XWJNI_END();
return result; return result;
} }