[BUG]std::thread crash while using dlopen/dlclose set APP_STL := c++_static

[gejianqiang]

• NDK Version: all NDK with APP_STL :=c++_static , tested from NDK 13,
• Build system: ndk-build
• Host OS: Windows10 64bit
• ABI:arm64-v8a
• NDK API level: APP_PLATFORM := android-24
• Device API level: not set

run this demo on android device with current O or P version,
if set APP_STL := c++_static, crash occurred when outside loop i = 128,
if set APP_STL := gnustl_static, there is no crash.
but after NDK r18, there is only c++_static. I have to use NDK R17 with gnustl_static

test demo and so, the flow is：
`demo:
main()
{
for(i=0; i<1000; i++)
{
dlopen so
for(int j=0; j<1; j++)
{
call process_func() in so
}
dlclose so
}
}

so：
process_func()
{
call std::thread and join
}`

[enh]

we'll be able to look at this much faster if you (a) provide an actual reproduceable test case and (b) include the specific crash from logcat.

[DanAlbert]

FWIW you could almost certainly solve your problem by not calling dlclose. dlclose is almost never a good idea and causes lots of problems.

[DanAlbert]

You might also be interested in reading through #360, but since you say your test fails on P I'm guessing that isn't the issue.

[gejianqiang]

FWIW you could almost certainly solve your problem by not calling dlclose. dlclose is almost never a good idea and causes lots of problems.

It is impossible by not calling dlclose or use RTLD_NODELETE， the daemon is as a server run at android HAL, it dlopen so on demand, there are hundreds of so.

Please raise the priority， Thanks.

[gejianqiang]

we'll be able to look at this much faster if you (a) provide an actual reproduceable test case and (b) include the specific crash from logcat.

(a) sorry, I am inconvenient to send code because of some restrictions, see the demo flow,
dlopen("xxx.so", RTLD_NOW | RTLD_LOCAL); // RTLD_GLOBAL or RTLD_NODELETE is no crash

(b) in demo command, info is "cannot create thread specific key for __cxa_get_globals()
Aborted"
logcat is :
03-12 04:15:36.320 20316 20836 E libc++abi: cannot create thread specific key for __cxa_get_globals()
03-12 04:15:36.321 20316 20836 F libc : Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 20836 (gjqtest_demo), pid 20316 (gjqtest_demo)
03-12 04:15:36.335 20839 20839 I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone
03-12 04:15:36.336 785 785 I /system/bin/tombstoned: received crash request for pid 20836
03-12 04:15:36.337 20839 20839 I crash_dump64: performing dump of process 20316 (target tid = 20836)
03-12 04:15:36.338 20839 20839 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
03-12 04:15:36.338 20839 20839 F DEBUG : Build fingerprint: 'kirin/kirin/kirin:9/PPR1.180610.011/24114:eng/test-keys'
03-12 04:15:36.338 20839 20839 F DEBUG : Revision: '0'
03-12 04:15:36.338 20839 20839 F DEBUG : ABI: 'arm64'
03-12 04:15:36.338 20839 20839 F DEBUG : pid: 20316, tid: 20836, name: gjqtest_demo >>> ./gjqtest_demo <<<
03-12 04:15:36.338 20839 20839 F DEBUG : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
03-12 04:15:36.338 20839 20839 F DEBUG : Abort message: 'cannot create thread specific key for __cxa_get_globals()'
03-12 04:15:36.338 20839 20839 F DEBUG : x0 0000000000000000 x1 0000000000005164 x2 0000000000000006 x3 0000000000000008
03-12 04:15:36.338 20839 20839 F DEBUG : x4 fefefefefefefeff x5 fefefefefefefeff x6 fefefefefefefeff x7 7f7f7f7f7f7f7f7f
03-12 04:15:36.338 20839 20839 F DEBUG : x8 0000000000000083 x9 5b58cc1e681d328c x10 0000000000000000 x11 fffffffc7fffffdf
03-12 04:15:36.338 20839 20839 F DEBUG : x12 0000000000000001 x13 000000005c873268 x14 0004b7e2abae49de x15 0000103f098aa005
03-12 04:15:36.338 20839 20839 F DEBUG : x16 00000079516322e0 x17 0000007951570cf8 x18 0000000000000001 x19 0000000000004f5c
03-12 04:15:36.338 20839 20839 F DEBUG : x20 0000000000005164 x21 000000795068d2d8 x22 00000000ffffff80 x23 00000000ffffffc8
03-12 04:15:36.338 20839 20839 F DEBUG : x24 000000795068d3a0 x25 000000795068d270 x26 000000795068d2b0 x27 0000000000000016
03-12 04:15:36.338 20839 20839 F DEBUG : x28 0000007fd9c7b5a4 x29 000000795068d1e0
03-12 04:15:36.338 20839 20839 F DEBUG : sp 000000795068d1a0 lr 0000007951565824 pc 000000795156584c
03-12 04:15:36.339 20839 20839 I unwind : Malformed section header found, ignoring...
03-12 04:15:36.340 20839 20839 F DEBUG :
03-12 04:15:36.340 20839 20839 F DEBUG : backtrace:
03-12 04:15:36.340 20839 20839 F DEBUG : #00 pc 000000000002284c /system/lib64/libc.so (abort+116)
03-12 04:15:36.340 20839 20839 F DEBUG : #1 pc 00000000000162b8 /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #2 pc 0000000000012fd4 /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #3 pc 0000000000083e54 /system/lib64/libc.so (pthread_once+148)
03-12 04:15:36.340 20839 20839 F DEBUG : #4 pc 0000000000012ef4 /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #5 pc 000000000001287c /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #6 pc 000000000000f664 /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #7 pc 000000000000fa5c /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #8 pc 000000000000e678 /data/gjqtest/libgjqtest.so
03-12 04:15:36.340 20839 20839 F DEBUG : #9 pc 00000000000827f0 /system/lib64/libc.so (__pthread_start(void*)+36)
03-12 04:15:36.340 20839 20839 F DEBUG : #10 pc 00000000000240a0 /system/lib64/libc.so (__start_thread+68)

[DanAlbert]

#789