When the execution of code on an ESP32 throws an exception, the output might look like this:
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.??
??
Core 1 register dump:??
PC : 0x420383b2 PS : 0x00060c30 A0 : 0x820059ec A1 : 0x3fcebd70 ??
A2 : 0x3fc97708 A3 : 0x3fcebdcb A4 : 0x00000001 A5 : 0x0000ff00 ??
A6 : 0x00ff0000 A7 : 0xff000000 A8 : 0x3fcecf5b A9 : 0x0000723f ??
A10 : 0x3fcecf5b A11 : 0x00000001 A12 : 0x00000001 A13 : 0x3fcf06b4 ??
A14 : 0x00000001 A15 : 0x00000003 SAR : 0x00000017 EXCCAUSE: 0x0000001c ??
EXCVADDR: 0x0000728b LBEG : 0x40056f08 LEND : 0x40056f12 LCOUNT : 0x00000000 ??
??
??
Backtrace: 0x420383af:0x3fcebd70 0x420059e9:0x3fcebd90 0x42004e26:0x3fcebdb0 0x420035a2:0x3fcebe00 0x42003595:0x3fcebe20 0x4200542c:0x3fcebe40 0x42008891:0x3fcebe60??
...The Espressif tools contain a binary called xtensa-esp32-elf-addr2line which will decode the backtrace addresses and return details about the source files, lines and function names, etc.
To run the tool, call:
/home/user/.espressif/tools/xtensa-esp32-elf/esp-2020r3-8.4.0/xtensa-esp32-elf/bin/xtensa-esp32-elf-addr2line -fe /path/to/build/<ELFFILE>.elf <BACKTRACE>In the command above, simply…
- replace the path to the
xtensa-esp32-elf-addr2linebinary
(in my case the binary is located in the users home directory in the folder.espressif) - replace the path to your elf file
(normally, theelffile is located in the build path and generated during compilation) - replace the backtrace output string
(it’s the string that is shown afterBacktrace:)
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