Guru Meditation Error: Core 0 panic'ed (LoadProhibited) . Exception was unhandled. (IDFGH-218)

[mohinishnaik]

Hi,
I am getting following error when I run my code.

Guru Meditation Error: Core 0 panic'ed (LoadProhibited)
. Exception was unhandled.
Core 0 register dump:
PC : 0x400813aaGuru Meditation Error: Core 0 panic'ed (LoadStoreError)
0x400813aa: esp_crosscore_int_send at /home/pod/esp/esp-idf/components/esp32/./crosscore_int.c:100

. Exception was unhandled.
Core 0 register dump:
PC : 0x4008cc79Guru Meditation Error: Core 0 panic'ed (LoadStoreError)
0x4008cc79: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

. Exception was unhandled.
Core 0 register dump:
PC : 0x4008cc79Guru Meditation Error: Core 0 panic'ed (LoadStoreError)
0x4008cc79: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

. Exception was unhandled.
Core 0 register dump:
PC : 0x4008cc79Guru Meditation Error: Core 0 panic'ed (LoadStoreError)
0x4008cc79: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

. Exception was unhandled.
Core 0 register dump:
PC : 0x4008cc79Guru Meditation Error: Core 0 panic'ed (LoadStoreError)
0x4008cc79: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

..........................continue

It continues to output . Exception was unhandled. and then it dumps the backtrace on serial monitor

Backtrace: 0x4008cc79:0x3ffb33c0 0x4008cf46:0x3ffb33e0 0x4008d098:0x3ffb3460 0x4008d2a0:0x3ffb3480 0x400821f2:0x3ffb34a0 0x4008cc76:0x3ffb3560 0x4008cc76:0x3ffb3580 0x4008d098:0x3ffb3600 0x4008d2a0:0x3ffb3620 0x400821f2:0x3ffb3640 0x4008cc76:0x3ffb3700 0x4008cc76:0x3ffb3720 0x4008d098:0x3ffb37a0 0x4008d2a0:0x3ffb37c0 0x400821f2:0x3ffb37e0 0x4008cc76:0x3ffb38a0 0x4008cc76:0x3ffb38c0 0x4008d098:0x3ffb3940 0x4008d2a0:0x3ffb3960 0x400821f2:0x3ffb3980 0x4008cc76:0x3ffb3a40 0x4008cc76:0x3ffb3a60 0x4008d098:0x3ffb3ae0 0x4008d2a0:0x3ffb3b00 0x400821f2:0x3ffb3b20 0x4008cc76:0x3ffb3be0 0x4008cc76:0x3ffb3c00 0x4008d098:0x3ffb3c80 0x4008d2a0:0x3ffb3ca0 0x400821f2:0x3ffb3cc0 0x4008cc76:0x3ffb3d80 0x4008cc76:0x3ffb3da0 0x4008d098:0x3ffb3e20 0x4008d2a0:0x3ffb3e40 0x400821f2:0x3ffb3e60 0x4008cc76:0x3ffb3f20 0x4008cc76:0x3ffb3f40 0x4008d098:0x3ffb3fc0 0x4008d2a0:0x3ffb3fe0 0x400821f2:0x3ffb4000 0x4008cc76:0x3ffb40c0 0x4008cc76:0x3ffb40e0 0x4008d098:0x3ffb4160 0x4008d2a0:0x3ffb4180 0x400821f2:0x3ffb41a0 0x4008cc76:0x3ffb4260 0x4008cc76:0x3ffb4280 0x4008d098:0x3ffb4300 0x4008d2a0:0x3ffb4320 0x400821f2:0x3ffb4340 0x4008cc76:0x3ffb4400
0x4008cc79: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

0x4008cf46: commonErrorHandler_dump at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

0x4008d098: commonErrorHandler at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

0x4008d2a0: xt_unhandled_exception at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

0x400821f2: _xt_user_exc at /home/pod/esp/esp-idf/components/freertos/./xtensa_vectors.S:718

0x4008cc76: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

0x4008cc76: panicPutStr at /home/pod/esp/esp-idf/components/esp32/./panic.c:648

......................................................continues

In my application I communicates to MQTT server in cloud. I have basically five tasks running, first is aws_iot_task which is almost same as given in espressif eg. code, second jsonParser task and third jsonStringifyTask. Both this tasks communicate to aws_iot_task through queues.

From the monitor log I see that the app seems to crash once jsonParser Task receives message through queue and it starts processing it.

Please help to to debug this issues, How can I exactly know what is the entry point of breakage.

[mimansamaheshwari]

I am using MCP23017 IO expander with Esp32 for performing certain tasks. I am using the standard Adafruit MCP23017 library on Arduino IDE with a little modifications needed for esp32. Everything was working fine but from last few days I am facing the problem of esp reset. The following message appears on Serial Monitor

Rebooting...
ets Jun 8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:956
load:0x40078000,len:0
load:0x40078000,len:13076
entry 0x40078a58
Guru Meditation Error: Core 0 panic'ed (LoadProhibited)
. Exception was unhandled.
Register dump:
PC : 0x400d0d63 PS : 0x00060930 A0 : 0x800d156d A1 : 0x3ffe3b60
A2 : 0x3ffc228c A3 : 0x00000000 A4 : 0x0000000d A5 : 0x00000000
A6 : 0x00000000 A7 : 0x00004e20 A8 : 0x800d0d5d A9 : 0x3ffe3b40
A10 : 0x3ffc228c A11 : 0x0000000c A12 : 0x0000000d A13 : 0x000186a0
A14 : 0x7ff00000 A15 : 0x00000000 SAR : 0x0000000d EXCCAUSE: 0x0000001c
EXCVADDR: 0x0000001c LBEG : 0x400d3b74 LEND : 0x400d3b93 LCOUNT : 0x00000000

Backtrace: 0x400d0d63:0x3ffe3b60 0x400d156a:0x3ffe3b80 0x400d1719:0x3ffe3ba0 0x400d175a:0x3ffe3bc0 0x400d63d7:0x3ffe3be0 0x40082e2d:0x3ffe3c00 0x40082fed:0x3ffe3c30 0x400788a6:0x3ffe3c50 0x4007890d:0x3ffe3c80 0x40078a52:0x3ffe3cb0 0x40078b7a:0x3ffe3e70 0x40007c31:0x3ffe3eb0 0x4000073d:0x3ffe3f20

Can any one tell me proper reason for this problem or the way how to troubleshoot this?

[chegewara]

try to use gdb or make monitor to see what this means and what is causing app crash:

Backtrace: 0x400d0d63:0x3ffe3b60 0x400d156a:0x3ffe3b80 0x400d1719:0x3ffe3ba0 0x400d175a:0x3ffe3bc0 0x400d63d7:0x3ffe3be0 0x40082e2d:0x3ffe3c00 0x40082fed:0x3ffe3c30 0x400788a6:0x3ffe3c50 0x4007890d:0x3ffe3c80 0x40078a52:0x3ffe3cb0 0x40078b7a:0x3ffe3e70 0x40007c31:0x3ffe3eb0 0x4000073d:0x3ffe3f20

[umer-ilyas]

I am getting following error when I run my code.

Guru Meditation Error: Core 1 panic'ed (InstrFetchProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x15383520 PS : 0x00060c30 A0 : 0x800dfcac A1 : 0x3fff7590
A2 : 0x00000000 A3 : 0x3ffb965c A4 : 0x15383520 A5 : 0x6c000001
A6 : 0x003fff74 A7 : 0x60000000 A8 : 0x800e0c11 A9 : 0x3fff7460
A10 : 0x3fff7590 A11 : 0x312e3738 A12 : 0x00000115 A13 : 0x3fff746c
A14 : 0x00000000 A15 : 0x3fff7560 SAR : 0x00000008 EXCCAUSE: 0x00000014
EXCVADDR: 0x15383520 LBEG : 0x4000c349 LEND : 0x4000c36b LCOUNT : 0x00000000

ELF file SHA256:

no backtrace

[KonstantinKondrashov]

Hi @umer-ilyas!
Your case is not usual because the panic handler was not able to print ELF file SHA256 could you describe in which case do you get that error? That kind of error can mean that the cache is disabled while the panic handler is trying to get the ELF file SHA256 value.
I provide a patch 7529.zip to fix this case. Could you give feedback this helps or not? (with this patch you able to see backtrace and print ELF file SHA256).
Thanks

[Alvin1Zhang]

@umer-ilyas Thanks for sharing the information, would you please help share if any updates for the issue? Thanks.

[o-marshmallow]

@umer-ilyas Please open a new issue if still relevant. I am closing this issue.