pussuw commented on code in PR #10857:
URL: https://github.com/apache/nuttx/pull/10857#discussion_r1346195434
##########
sched/task/task_exithook.c:
##########
@@ -465,7 +465,15 @@ void nxtask_exithook(FAR struct tcb_s *tcb, int status)
* status (no zombies here!)
*/
- group_leave(tcb);
+ if (group_leave(tcb) == 0)
+ {
+ /* Group is dead now, PANIC() if this is the init task */
+
+ if (nxsched_is_inittask(tcb))
Review Comment:
```
ville@workpc:~/wpc_toolchain/workspace/nuttx-bare/nuttx$ qemu-system-riscv64
-semihosting -M virt,aclint=on -cpu rv64 -smp 8 -bios none -kernel nuttx
-nographic
ABC
NuttShell (NSH) NuttX-10.4.0
nsh> exit
[ 1.640000] riscv_exception: EXCEPTION: Load access fault. MCAUSE:
0000000000000005, EPC: 000000008000531a, MTVAL: 0000000000000008
[ 1.640000] riscv_exception: PANIC!!! Exception = 0000000000000005
[ 1.640000] _assert: Current Version: NuttX 10.4.0 3b71bad8c7 Oct 4
2023 19:56:45 risc-v
[ 1.640000] _assert: Assertion failed panic: at file:
common/riscv_exception.c:85 task: /system/bin/init 0xc000004a
[ 1.640000] up_dump_register: EPC: 000000008000531a
[ 1.640000] up_dump_register: A0: 0000000080209650 A1: 0000000080209460
A2: 00000000802095c0 A3: 0000000000000000
[ 1.640000] up_dump_register: A4: 0000000000007fff A5: 0000000000000000
A6: 0000000080206c38 A7: fffffffffffffff8
[ 1.640000] up_dump_register: T0: 0000000080006c34 T1: 0000000000000007
T2: 00000000000001ff T3: 0000000080209838
[ 1.640000] up_dump_register: T4: 0000000080209830 T5: 0000000000000009
T6: 000000000000002a
[ 1.640000] up_dump_register: S0: 0000000080209650 S1: 0000000080209470
S2: 00000000802094a0 S3: 0000000000000000
[ 1.640000] up_dump_register: S4: 0000000000000000 S5: 0000000000000000
S6: ffffffffffffffff S7: 000000000000000b
[ 1.640000] up_dump_register: S8: 000000000000000a S9: 0000000000000000
S10: 0000000000000000 S11: 0000000000000000
[ 1.640000] up_dump_register: SP: 00000000802091f0 FP: 0000000080209650
TP: 0000000000000000 RA: 0000000080005130
[ 1.640000] dump_stack: Kernel Stack:
[ 1.640000] dump_stack: base: 0x80208860
[ 1.640000] dump_stack: size: 00003072
[ 1.640000] dump_stack: sp: 0x802091f0
[ 1.640000] stack_dump: 0x802091e0: 80209650 00000000 800050c0 00000000
00000001 00000000 80209650 00000000
[ 1.640000] stack_dump: 0x80209200: 00000000 00000000 8000450a 00000000
c02002e8 00000000 c0200858 00000000
[ 1.640000] stack_dump: 0x80209220: 00000000 00000000 80006c40 00000000
c0202b40 00000000 800013a4 00000000
[ 1.640000] stack_dump: 0x80209240: c0000d16 00000000 8000019a 00000000
8000138c 00000000 c0000d16 00000000
[ 1.640000] stack_dump: 0x80209260: 80209250 00000000 00000000 00000000
00000000 00000000 800072da 00000000
[ 1.640000] stack_dump: 0x80209280: c00011a6 00000000 000001ff 00000000
00000000 00000000 c0200858 00000000
[ 1.640000] stack_dump: 0x802092a0: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x802092c0: 00007fff 00000000 00000001 00000000
c0200118 00000000 fffffff8 ffffffff
[ 1.640000] stack_dump: 0x802092e0: 00000001 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209300: ffffffff ffffffff 0000000b 00000000
0000000a 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209320: 00000000 00000000 00000000 00000000
802090e0 00000000 802090d8 00000000
[ 1.640000] stack_dump: 0x80209340: 00000009 00000000 0000002a 00000000
00042120 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209360: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209380: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x802093a0: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x802093c0: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x802093e0: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209400: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209420: 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
[ 1.640000] stack_dump: 0x80209440: 00000000 00000000 800044c8 00000000
00000000 00000000 00000000 00000000
[ 1.640000] dump_tasks: PID GROUP PRI POLICY TYPE NPX STATE
EVENT SIGMASK STACKBASE STACKSIZE USED FILLED COMMAND
[ 1.640000] dump_tasks: ---- --- --- -------- ------- --- -------
---------- ---------------- 0x802002b0 2048 2040 99.6%! irq
[ 1.640000] dump_task: 0 0 0 FIFO Kthread N-- Ready
0000000000000000 0x80206010 3056 1520 49.7% Idle_Task
[ 1.640000] dump_task: 1 1 100 RR Kthread --- Waiting
Semaphore 0000000000000000 0x8020a050 1968 704 35.7% lpwork
0x802015f0 0x80201618
[ 1.640000] dump_task: 2 -1 100 RR Task N-- Running
0000000000000000 0xc0202040 3008 768 25.5%
/system/bin/init
```
Just tried it, and the system crashes at once. Perhaps there is some bug
that needs to be fixed. IRQ stack usage seems a bit high but that can be due to
the assert dump.
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