Giuseppe
Reputation: 1089
Android : JNI Java From C Memory Leak
It seems that following code is wrong, as on the first call the code work well, but on second the VM kill the caller App.
JNIEXPORT jint JNICALL Java_com_voice4facebook_MegaRecorderActivity_startMix(JNIEnv* env, jobject obj, jobjectArray params) {
int stringCount = (*env)->GetArrayLength(env, params);
char * argv[stringCount];
int i = 0;
while (i < stringCount) {
jstring string = (jstring)(*env)->GetObjectArrayElement(env, params, i);
const char *rawString = (*env)->GetStringUTFChars(env, string, 0);
argv[i] = rawString;
// Don't forget to call `ReleaseStringUTFChars` when you're done
i++;
}
main(stringCount, argv);
i = 0;
while (i < stringCount)
{
jstring string = (jstring)(*env)->GetObjectArrayElement(env, params, i);
(*env)->ReleaseStringUTFChars (env, string, argv[i++]);
}
success = 1;
return 0;
}
Logcat:
02-14 16:18:18.075 26785 26835 D PowerManagerService: setLightBrightness : mButtonLight : 0
02-14 16:18:19.625 17098 17098 I DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
02-14 16:18:19.625 17098 17098 I DEBUG : Build fingerprint: 'samsung/GT-I9100/GT-I9100:2.3.5/GINGERBREAD/XWKI8:user/release-keys'
02-14 16:18:19.625 17098 17098 I DEBUG : pid: 21146, tid: 21247 >>> com.voice4facebook <<<
02-14 16:18:19.625 17098 17098 I DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad
02-14 16:18:19.625 17098 17098 I DEBUG : r0 00000027 r1 deadbaad r2 0000001c r3 00000000
02-14 16:18:19.625 17098 17098 I DEBUG : r4 00000001 r5 00000000 r6 002f2ad8 r7 0000a000
02-14 16:18:19.625 17098 17098 I DEBUG : r8 8291f778 r9 47172eb4 10 48052a60 fp 48052ab4
02-14 16:18:19.625 17098 17098 I DEBUG : ip afd466a8 sp 480529d8 lr afd1a123 pc afd161c0 cpsr 60000030
02-14 16:18:19.635 17098 17098 I DEBUG : d0 459000003f800000 d1 0001000100001200
02-14 16:18:19.635 17098 17098 I DEBUG : d2 41d80000cf000000 d3 3f80000000ff00ff
02-14 16:18:19.635 17098 17098 I DEBUG : d4 41d8000000000000 d5 423400003fc00000
02-14 16:18:19.635 17098 17098 I DEBUG : d6 0000000043b40000 d7 000000024f000000
02-14 16:18:19.635 17098 17098 I DEBUG : d8 3ff0000000000000 d9 0000000000000000
02-14 16:18:19.635 17098 17098 I DEBUG : d10 0000000000000000 d11 0000000000000000
02-14 16:18:19.635 17098 17098 I DEBUG : d12 0000000000000000 d13 0000000000000000
02-14 16:18:19.640 17098 17098 I DEBUG : d14 0000000000000000 d15 0000000000000000
02-14 16:18:19.640 17098 17098 I DEBUG : d16 0000000000000000 d17 4000000000000000
02-14 16:18:19.640 17098 17098 I DEBUG : d18 8f94989898989898 d19 e1e9f0f0f0f0f0f0
02-14 16:18:19.640 17098 17098 I DEBUG : d20 0000000000000000 d21 0000000000000000
02-14 16:18:19.640 17098 17098 I DEBUG : d22 0000000000000000 d23 0000000000000000
02-14 16:18:19.640 17098 17098 I DEBUG : d24 0000000000000000 d25 0000000000000000
02-14 16:18:19.640 17098 17098 I DEBUG : d26 9898989898989898 d27 f0f0f0f0f0f0f0f0
02-14 16:18:19.640 17098 17098 I DEBUG : d28 0002aaa80002aaa8 d29 0002aaa80002aaa8
02-14 16:18:19.645 17098 17098 I DEBUG : d30 0001000000010000 d31 0001000000010000
02-14 16:18:19.650 17098 17098 I DEBUG : scr 60000013
02-14 16:18:19.650 17098 17098 I DEBUG :
02-14 16:18:19.780 17098 17098 I DEBUG : #00 pc 000161c0 /system/lib/libc.so
02-14 16:18:19.780 17098 17098 I DEBUG : #01 pc 00013b30 /system/lib/libc.so
02-14 16:18:19.780 17098 17098 I DEBUG : #02 pc 000149f6 /system/lib/libc.so
02-14 16:18:19.780 17098 17098 I DEBUG : #03 pc 00010f70 /data/data/com.voice4facebook/lib/libplayer.so
02-14 16:18:19.780 17098 17098 I DEBUG : #04 pc 00017ef4 /system/lib/libdvm.so
02-14 16:18:19.780 17098 17098 I DEBUG : #05 pc 0004994c /system/lib/libdvm.so
02-14 16:18:19.785 17098 17098 I DEBUG : #06 pc 00042440 /system/lib/libdvm.so
02-14 16:18:19.785 17098 17098 I DEBUG : #07 pc 0004f0fe /system/lib/libdvm.so
02-14 16:18:19.785 17098 17098 I DEBUG : #08 pc 00029790 /system/lib/libdvm.so
02-14 16:18:19.785 17098 17098 I DEBUG :
02-14 16:18:19.785 17098 17098 I DEBUG : code around pc:
02-14 16:18:19.785 17098 17098 I DEBUG : afd161a0 2c006824 e028d1fb b13368db c064f8df
02-14 16:18:19.785 17098 17098 I DEBUG : afd161b0 44fc2401 4000f8cc 49124798 25002027
02-14 16:18:19.785 17098 17098 I DEBUG : afd161c0 f7f57008 2106ea16 eb8af7f6 460aa901
02-14 16:18:19.785 17098 17098 I DEBUG : afd161d0 f04f2006 95015380 95029303 eef0f7f5
02-14 16:18:19.785 17098 17098 I DEBUG : afd161e0 462aa905 f7f52002 f7f5eefc 2106ea02
02-14 16:18:19.785 17098 17098 I DEBUG :
02-14 16:18:19.785 17098 17098 I DEBUG : code around lr:
02-14 16:18:19.785 17098 17098 I DEBUG : afd1a100 f9b0d505 2100000e f7f12202 89a1ea4a
02-14 16:18:19.785 17098 17098 I DEBUG : afd1a110 f421462a 46315080 f9b481a0 f7f1000e
02-14 16:18:19.785 17098 17098 I DEBUG : afd1a120 bd70e9d0 4604b510 000ef9b0 e9b8f7f1
02-14 16:18:19.785 17098 17098 I DEBUG : afd1a130 bfbe2800 f42389a3 81a35380 6d21db02
02-14 16:18:19.785 17098 17098 I DEBUG : afd1a140 6523180b bf00bd10 41f3e92d f44f4606
02-14 16:18:19.785 17098 17098 I DEBUG :
02-14 16:18:19.785 17098 17098 I DEBUG : stack:
02-14 16:18:19.785 17098 17098 I DEBUG : 48052998 afd4686c
02-14 16:18:19.785 17098 17098 I DEBUG : 4805299c 00313128
02-14 16:18:19.785 17098 17098 I DEBUG : 480529a0 0000001c
02-14 16:18:19.785 17098 17098 I DEBUG : 480529a4 afd187b9 /system/lib/libc.so
02-14 16:18:19.785 17098 17098 I DEBUG : 480529a8 afd42644
02-14 16:18:19.785 17098 17098 I DEBUG : 480529ac afd4686c
02-14 16:18:19.785 17098 17098 I DEBUG : 480529b0 00000000
02-14 16:18:19.785 17098 17098 I DEBUG : 480529b4 afd196f1 /system/lib/libc.so
02-14 16:18:19.785 17098 17098 I DEBUG : 480529b8 00000001
02-14 16:18:19.785 17098 17098 I DEBUG : 480529bc 480529ec
02-14 16:18:19.785 17098 17098 I DEBUG : 480529c0 002f2ad8
02-14 16:18:19.790 17098 17098 I DEBUG : 480529c4 0000a000
02-14 16:18:19.790 17098 17098 I DEBUG : 480529c8 8291f778
02-14 16:18:19.790 17098 17098 I DEBUG : 480529cc afd18a13 /system/lib/libc.so
02-14 16:18:19.790 17098 17098 I DEBUG : 480529d0 df002777
02-14 16:18:19.790 17098 17098 I DEBUG : 480529d4 e3a070ad
02-14 16:18:19.790 17098 17098 I DEBUG : #00 480529d8 8291f778
02-14 16:18:19.790 17098 17098 I DEBUG : 480529dc 00000004
02-14 16:18:19.790 17098 17098 I DEBUG : 480529e0 000001c0
02-14 16:18:19.790 17098 17098 I DEBUG : 480529e4 00000000
02-14 16:18:19.790 17098 17098 I DEBUG : 480529e8 002f2ad8
02-14 16:18:19.790 17098 17098 I DEBUG : 480529ec fffffbdf
02-14 16:18:19.790 17098 17098 I DEBUG : 480529f0 8291f778
02-14 16:18:19.790 17098 17098 I DEBUG : 480529f4 afd46490
02-14 16:18:19.790 17098 17098 I DEBUG : 480529f8 00000000
02-14 16:18:19.790 17098 17098 I DEBUG : 480529fc afd13b35 /system/lib/libc.so
02-14 16:18:19.790 17098 17098 I DEBUG : #01 48052a00 000001c0
02-14 16:18:19.790 17098 17098 I DEBUG : 48052a04 00000000
02-14 16:18:19.790 17098 17098 I DEBUG : 48052a08 ffffffff
02-14 16:18:19.790 17098 17098 I DEBUG : 48052a0c 0000000f
02-14 16:18:19.790 17098 17098 I DEBUG : 48052a10 8291f778
02-14 16:18:19.790 17098 17098 I DEBUG : 48052a14 afd149f9 /system/lib/libc.so
02-14 16:18:19.920 2597 2785 I ALSAModule: Terminated ALSA PLAYBACK device hifi
02-14 16:18:20.350 2597 21255 E yamaha::media::Parameters: SalesCode = HUI
02-14 16:18:20.510 17098 17098 I DEBUG : dumpstate /data/log/dumpstate_app_native.txt
02-14 16:18:20.510 26785 26821 I BootReceiver: Copying /data/tombstones/tombstone_08 to DropBox (SYSTEM_TOMBSTONE)
02-14 16:18:20.515 21257 21257 I dumpstate: begin
02-14 16:18:22.255 12902 12902 D dalvikvm: GC_EXPLICIT freed 6K, 47% free 3243K/6023K, external 0K/0K, paused 66ms
02-14 16:18:22.945 2589 2709 D VoldCmdListener: asec list
02-14 16:18:23.735 26913 26913 I StatusBarPolicy: onSignalStrengthsChanged
02-14 16:18:23.735 26913 26913 D StatusBarPolicy: updateSignalStrength: numeric=22299, curOperator=3 ITA
02-14 16:18:24.110 21257 21257 I dumpstate: done
02-14 16:18:24.165 17098 17098 I DEBUG : debuggerd committing suicide to free the zombie!
02-14 16:18:24.165 21322 21322 I DEBUG : debuggerd: Sep 28 2011 20:51:05
Upvotes: 0
Views: 1185
Answers (2)
Michael Anderson
Reputation: 73490
The first entry in the log is a hint to what the problem could be
02-14 16:18:19.625 17098 17098 I DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR),
fault addr deadbaad
That address looks like a debug memory address.
From wikipedia:
0xDEADBAAD ("dead bad") is used by the Android libc abort() function when native heap corruption is detected.
This usually means you've free'd or delete'd something you didn't malloc or new. Maybe inside your main function you're trying to delete variables in the input array?
Upvotes: 0
James M
Reputation: 16718
You need to release the string when you're done with it. Try this before success = 1:
i = 0;
while (i < stringCount)
{
jstring string = (jstring)(*env)->GetObjectArrayElement(env, params, i);
(*env)->ReleaseStringUTFChars (env, string, argv[i++]);
}
Upvotes: 1
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