1032936 - Invoking 'jsjni_FindClass' from a chrome worker using ctypes crashes Fennec

Status: RESOLVED INCOMPLETE

(Firefox for Android Graveyard :: General, defect)

Description

[Martyn Haigh (:mhaigh)]

Attachment: Minimum test case for jsjni_FindClass chrome worker crash

The following call is causing Fennec to die when called from a chrome worker:

let findClass = ctypes.open("libxul.so").declare("jsjni_FindClass",
                                          ctypes.default_abi,
                                          ctypes.StructType("_jobject").ptr,
                                          ctypes.char.ptr);
findClass("org/mozilla/gecko/GeckoApp");


When called from a chrome script, which isn't a worker, the call works as expected with no crash.

Attached is a minimal test case which demonstrates that calling jsjni_FindClass from a non chrome worker works as expected within the browser.js file, however causes Fennec to die when called from the TestCaseWorker.js file.

Here's the crash log from that attached patch:

…
4755              GeckoDump  I  BEFORE TEST CASE WORKER
…
4755                   libc  F  Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1), thread 5130 (DOM Worker)
…
5235               dalvikvm  D  Late-enabling CheckJNI
5235               dalvikvm  D  Trying to load lib /data/app-lib/org.mozilla.fennec_martyn-1/libmozglue.so 0x41ec37f8
5235               dalvikvm  D  Added shared lib /data/app-lib/org.mozilla.fennec_martyn-1/libmozglue.so 0x41ec37f8
5235               dalvikvm  D  No JNI_OnLoad found in /data/app-lib/org.mozilla.fennec_martyn-1/libmozglue.so 0x41ec37f8, skipping init
…

I'm unsure if the last four lines are relevant but they look a bit suspicious.

Comment 1

[BMO Automation]

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