C++ Breakpoints not hit

[janwiesemann]

Describe the bug.

I'm currently trying to develop a small application for FZ. It utilizes some C++ Code and I would like to debug it. Sadly, it does not work. FreeRTOS and hardware close development is relatively new for me. I'm able to add C breakpoints. Yes, I could definitely write it in C but where is the fun in that?

Any help or hint would be appreciated.

Setup:

• JLink Mini EDU
• VS-Code
• fbt (application in applications_user/; not using ufbt)
• firmware repo release @ 0.104.0

Reproduction

1. Create a new app
2. Add some C++ code
3. build it and try to attach a debugger to the application

Target

f7 with VS-Code and C++

Logs

VS-Code Debug Console

Cortex-Debug: VSCode debugger extension version 1.12.1 git(652d042). Usage info: https://github.com/Marus/cortex-debug#usage
Reading symbols from /Users/user/Projects/flipper/flipperzero-firmware/toolchain/current/bin/arm-none-eabi-objdump --syms -C -h -w /Users/user/Projects/flipper/flipperzero-firmware/build/latest/firmware.elf
Reading symbols from /Users/user/Projects/flipper/flipperzero-firmware/toolchain/current/bin/arm-none-eabi-nm --defined-only -S -l -C -p /Users/user/Projects/flipper/flipperzero-firmware/build/latest/firmware.elf
Launching GDB: /Users/user/Projects/flipper/flipperzero-firmware/toolchain/current/bin/arm-none-eabi-gdb-py3 -q --interpreter=mi2
    IMPORTANT: Set "showDevDebugOutput": "raw" in "launch.json" to see verbose GDB transactions here. Very helpful to debug issues or report problems
Launching gdb-server: JLinkGDBServer -singlerun -nogui -if swd -port 50000 -swoport 50001 -telnetport 50002 -device STM32WB55RG -rtos GDBServer/RTOSPlugin_FreeRTOS.dylib
    Please check TERMINAL tab (gdb-server) for output from JLinkGDBServer
Finished reading symbols from objdump: Time: 42 ms
Output radix now set to decimal 10, hex a, octal 12.
Input radix now set to decimal 10, hex a, octal 12.
Finished reading symbols from nm: Time: 767 ms
vPortSuppressTicksAndSleep (expected_idle_ticks=30) at targets/f7/furi_hal/furi_hal_os.c:172
172	        return;
Program stopped, probably due to a reset and/or halt issued by debugger
Firmware version on attached Flipper:
	Version:     0.104.0
	Built on:    24-07-2024
	Git branch:  release
	Git commit:  ee1b8b9f
	Dirty:       False
	HW Target:   7
	Origin:      Official
	Git origin:  [email protected]:user/flipperzero-firmware.git,https://github.com/flipperdevices/flipperzero-firmware.git
Support for Flipper external apps debug is loaded
Set 'build/latest/.extapps' as debug info lookup path for Flipper external apps
Attaching to Flipper firmware
[New Remote target]
[New Thread 536882256]
[New Thread 537080456]
[New Thread 537081676]
[New Thread 536882912]
[New Thread 537106944]
[New Thread 537072504]
[New Thread 537085728]
[New Thread 537083920]
[New Thread 537085336]
[New Thread 536950776]
[New Thread 536886176]
[New Thread 537073724]
[New Thread 536910936]
[New Thread 536909416]
[New Thread 536884472]
[New Thread 537085532]
[New Thread 537074944]
[New Thread 536890328]
[New Thread 537084116]
[New Thread 537079236]

Thread
3 received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 536882256]
vPortSuppressTicksAndSleep (expected_idle_ticks=86) at targets/f7/furi_hal/furi_hal_os.c:172
172	        return;

Thread
3 received signal SIGTRAP, Trace/breakpoint trap.
vPortSuppressTicksAndSleep (expected_idle_ticks=60) at targets/f7/furi_hal/furi_hal_os.c:172
172	        return;
[New Thread 536919432]

Thread
11 received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 537085336]
loader_start_external_app (error_message=0x2000c250, args=0x0, path=<optimized out>, storage=<optimized out>, loader=0x200066e0) at applications/services/loader/loader.c:530
530	            __asm volatile("bkpt 0");
New application loaded. Adding debug info
Loading debug information from build/latest/.extapps/dolphin_jump_d.elf
add symbol table from file "build/latest/.extapps/dolphin_jump_d.elf" at
	.text_addr = 0x2000c75c
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7_S_copyEPcPKcj_addr = 0x2000c8f4
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_replaceEjjPKcj_addr = 0x2000d0cc
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1IS3_EEPKcRKS3__addr = 0x2000ce1c
	.text._ZNSt15__new_allocatorIcE10deallocateEPcj_addr = 0x2000ab0c
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_disposeEv_addr = 0x2000ca1c
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7replaceEjjPKcj_addr = 0x2000d25c
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEjjPKcj_addr = 0x2000cf04
	.bss_addr = 0x2000c474
	.rodata_addr = 0x2000d2ac
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7_S_moveEPcPKcj_addr = 0x2000cae4
	.text._ZNSt15__new_allocatorIcE8allocateEjPKv_addr = 0x2000cb44
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_createERjj_addr = 0x2000cc34
	.text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_M_constructIPKcEEvT_S8_St20forward_iterator_tag_addr = 0x2000cc84
warning: section .text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE10_M_replaceEjjPKcj not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1IS3_EEPKcRKS3_ not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt15__new_allocatorIcE10deallocateEPcj not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7replaceEjjPKcj not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEjjPKcj not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt15__new_allocatorIcE8allocateEjPKv not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_createERjj not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
warning: section .text._ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_M_constructIPKcEEvT_S8_St20forward_iterator_tag not found in /Users/user/Projects/flipper/flipperzero-firmware/build/f7-firmware-C/.extapps/dolphin_jump_d.elf
Failed to set debug mode: Cannot access memory at address 0x200009cc

Full Build log

rm -rf build/f7-firmware-C/.extapps/ && ./fbt COMPACT=1 DEBUG=0 VERBOSE=1 build APPSRC=applications_user/dolphin-jump/main.cpp

arm-none-eabi-g++ -o build/f7-firmware-C/.extapps/dolphin_jump/Game.o -c -std=c++20 -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-threadsafe-statics -ftemplate-depth=4096 -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mthumb -Wall -Wextra -Werror -Wno-error=deprecated-declarations -Wno-address-of-packed-member -Wredundant-decls -Wdouble-promotion -fdata-sections -ffunction-sections -fsingle-precision-constant -fno-math-errno -g -Os -mword-relocations -mlong-calls -fno-common -nostdlib -D_GNU_SOURCE -DFW_CFG_default -D"M_MEMORY_FULL(x)=abort()" -DSTM32WB -DSTM32WB55xx -DUSE_FULL_ASSERT -DUSE_FULL_LL_DRIVER -DMBEDTLS_CONFIG_FILE=\"mbedtls_cfg.h\" -DPB_ENABLE_MALLOC -DFW_ORIGIN_Official -DFURI_NDEBUG -DNDEBUG -DFAP_VERSION=\"0.1\" -Ifuri -Iapplications/services -Iapplications/main -Itargets/furi_hal_include -Itargets/f7/ble_glue -Itargets/f7/fatfs -Itargets/f7/furi_hal -Itargets/f7/inc -I. -Ilib -Ibuild/f7-firmware-C/assets/compiled -Ilib/mlib -Ilib/cmsis_core -Ilib/stm32wb_cmsis/Include -Ilib/stm32wb_hal/Inc -Ilib/stm32wb_copro/wpan -Ilib/drivers -Ilib/FreeRTOS-Kernel/include -Ilib/FreeRTOS-Kernel/portable/GCC/ARM_CM4F -Ilib/FreeRTOS-glue -Ilib/microtar/src -Ilib/mbedtls/include -Ilib/toolbox -Ilib/libusb_stm32/inc -Ilib/drivers -Ilib/flipper_format -Ilib/one_wire -Ilib/ibutton -Ilib/infrared/encoder_decoder -Ilib/infrared/worker -Ilib/littlefs -Ilib/subghz -Ilib/nfc -Ilib/digital_signal -Ilib/pulse_reader -Ilib/signal_reader -Ilib/app-scened-template -Ilib/callback-connector -Ilib/u8g2 -Ilib/lfrfid -Ilib/flipper_application -Ilib/music_worker -Ilib/mjs -Ilib/nanopb -Ilib/heatshrink -Ilib/ble_profile -Ilib/bit_lib -Ilib/datetime -Ibuild/f7-firmware-C/.extapps/dolphin_jump -Iapplications_user/dolphin-jump applications_user/dolphin-jump/Game.cpp
python3 scripts/assets.py icons applications_user/dolphin-jump/images build/f7-firmware-C/.extapps/dolphin_jump --filename dolphin_jump_icons
arm-none-eabi-g++ -o build/f7-firmware-C/.extapps/dolphin_jump/main.o -c -std=c++20 -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-threadsafe-statics -ftemplate-depth=4096 -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mthumb -Wall -Wextra -Werror -Wno-error=deprecated-declarations -Wno-address-of-packed-member -Wredundant-decls -Wdouble-promotion -fdata-sections -ffunction-sections -fsingle-precision-constant -fno-math-errno -g -Os -mword-relocations -mlong-calls -fno-common -nostdlib -D_GNU_SOURCE -DFW_CFG_default -D"M_MEMORY_FULL(x)=abort()" -DSTM32WB -DSTM32WB55xx -DUSE_FULL_ASSERT -DUSE_FULL_LL_DRIVER -DMBEDTLS_CONFIG_FILE=\"mbedtls_cfg.h\" -DPB_ENABLE_MALLOC -DFW_ORIGIN_Official -DFURI_NDEBUG -DNDEBUG -DFAP_VERSION=\"0.1\" -Ifuri -Iapplications/services -Iapplications/main -Itargets/furi_hal_include -Itargets/f7/ble_glue -Itargets/f7/fatfs -Itargets/f7/furi_hal -Itargets/f7/inc -I. -Ilib -Ibuild/f7-firmware-C/assets/compiled -Ilib/mlib -Ilib/cmsis_core -Ilib/stm32wb_cmsis/Include -Ilib/stm32wb_hal/Inc -Ilib/stm32wb_copro/wpan -Ilib/drivers -Ilib/FreeRTOS-Kernel/include -Ilib/FreeRTOS-Kernel/portable/GCC/ARM_CM4F -Ilib/FreeRTOS-glue -Ilib/microtar/src -Ilib/mbedtls/include -Ilib/toolbox -Ilib/libusb_stm32/inc -Ilib/drivers -Ilib/flipper_format -Ilib/one_wire -Ilib/ibutton -Ilib/infrared/encoder_decoder -Ilib/infrared/worker -Ilib/littlefs -Ilib/subghz -Ilib/nfc -Ilib/digital_signal -Ilib/pulse_reader -Ilib/signal_reader -Ilib/app-scened-template -Ilib/callback-connector -Ilib/u8g2 -Ilib/lfrfid -Ilib/flipper_application -Ilib/music_worker -Ilib/mjs -Ilib/nanopb -Ilib/heatshrink -Ilib/ble_profile -Ilib/bit_lib -Ilib/datetime -Ibuild/f7-firmware-C/.extapps/dolphin_jump -Iapplications_user/dolphin-jump applications_user/dolphin-jump/main.cpp
_validate_api_cache(["targets/f7/api_symbols.csv"], ["build/f7-firmware-C/sdk_origin.i"])
arm-none-eabi-gcc -o build/f7-firmware-C/.extapps/dolphin_jump/dolphin_jump.o -c -std=gnu2x -Wstrict-prototypes -Wno-strict-prototypes -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mthumb -Wall -Wextra -Werror -Wno-error=deprecated-declarations -Wno-address-of-packed-member -Wredundant-decls -Wdouble-promotion -fdata-sections -ffunction-sections -fsingle-precision-constant -fno-math-errno -g -Os -mword-relocations -mlong-calls -fno-common -nostdlib -D_GNU_SOURCE -DFW_CFG_default -D"M_MEMORY_FULL(x)=abort()" -DSTM32WB -DSTM32WB55xx -DUSE_FULL_ASSERT -DUSE_FULL_LL_DRIVER -DMBEDTLS_CONFIG_FILE=\"mbedtls_cfg.h\" -DPB_ENABLE_MALLOC -DFW_ORIGIN_Official -DFURI_NDEBUG -DNDEBUG -DFAP_VERSION=\"0.1\" -Ifuri -Iapplications/services -Iapplications/main -Itargets/furi_hal_include -Itargets/f7/ble_glue -Itargets/f7/fatfs -Itargets/f7/furi_hal -Itargets/f7/inc -I. -Ilib -Ibuild/f7-firmware-C/assets/compiled -Ilib/mlib -Ilib/cmsis_core -Ilib/stm32wb_cmsis/Include -Ilib/stm32wb_hal/Inc -Ilib/stm32wb_copro/wpan -Ilib/drivers -Ilib/FreeRTOS-Kernel/include -Ilib/FreeRTOS-Kernel/portable/GCC/ARM_CM4F -Ilib/FreeRTOS-glue -Ilib/microtar/src -Ilib/mbedtls/include -Ilib/toolbox -Ilib/libusb_stm32/inc -Ilib/drivers -Ilib/flipper_format -Ilib/one_wire -Ilib/ibutton -Ilib/infrared/encoder_decoder -Ilib/infrared/worker -Ilib/littlefs -Ilib/subghz -Ilib/nfc -Ilib/digital_signal -Ilib/pulse_reader -Ilib/signal_reader -Ilib/app-scened-template -Ilib/callback-connector -Ilib/u8g2 -Ilib/lfrfid -Ilib/flipper_application -Ilib/music_worker -Ilib/mjs -Ilib/nanopb -Ilib/heatshrink -Ilib/ble_profile -Ilib/bit_lib -Ilib/datetime -Ibuild/f7-firmware-C/.extapps/dolphin_jump -Iapplications_user/dolphin-jump applications_user/dolphin-jump/dolphin_jump.c
arm-none-eabi-gcc -o build/f7-firmware-C/.extapps/dolphin_jump/dolphin_jump_icons.o -c -std=gnu2x -Wstrict-prototypes -Wno-strict-prototypes -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mthumb -Wall -Wextra -Werror -Wno-error=deprecated-declarations -Wno-address-of-packed-member -Wredundant-decls -Wdouble-promotion -fdata-sections -ffunction-sections -fsingle-precision-constant -fno-math-errno -g -Os -mword-relocations -mlong-calls -fno-common -nostdlib -D_GNU_SOURCE -DFW_CFG_default -D"M_MEMORY_FULL(x)=abort()" -DSTM32WB -DSTM32WB55xx -DUSE_FULL_ASSERT -DUSE_FULL_LL_DRIVER -DMBEDTLS_CONFIG_FILE=\"mbedtls_cfg.h\" -DPB_ENABLE_MALLOC -DFW_ORIGIN_Official -DFURI_NDEBUG -DNDEBUG -DFAP_VERSION=\"0.1\" -Ifuri -Iapplications/services -Iapplications/main -Itargets/furi_hal_include -Itargets/f7/ble_glue -Itargets/f7/fatfs -Itargets/f7/furi_hal -Itargets/f7/inc -I. -Ilib -Ibuild/f7-firmware-C/assets/compiled -Ilib/mlib -Ilib/cmsis_core -Ilib/stm32wb_cmsis/Include -Ilib/stm32wb_hal/Inc -Ilib/stm32wb_copro/wpan -Ilib/drivers -Ilib/FreeRTOS-Kernel/include -Ilib/FreeRTOS-Kernel/portable/GCC/ARM_CM4F -Ilib/FreeRTOS-glue -Ilib/microtar/src -Ilib/mbedtls/include -Ilib/toolbox -Ilib/libusb_stm32/inc -Ilib/drivers -Ilib/flipper_format -Ilib/one_wire -Ilib/ibutton -Ilib/infrared/encoder_decoder -Ilib/infrared/worker -Ilib/littlefs -Ilib/subghz -Ilib/nfc -Ilib/digital_signal -Ilib/pulse_reader -Ilib/signal_reader -Ilib/app-scened-template -Ilib/callback-connector -Ilib/u8g2 -Ilib/lfrfid -Ilib/flipper_application -Ilib/music_worker -Ilib/mjs -Ilib/nanopb -Ilib/heatshrink -Ilib/ble_profile -Ilib/bit_lib -Ilib/datetime -Ibuild/f7-firmware-C/.extapps/dolphin_jump -Iapplications_user/dolphin-jump build/f7-firmware-C/.extapps/dolphin_jump/dolphin_jump_icons.c
Using tempfile /var/folders/mj/qp601k_s0rx3cwsv6chm7_6h0000gn/T/tmp_yi0ce9y.lnk for command line:
arm-none-eabi-g++ -o build/f7-firmware-C/.extapps/dolphin_jump_d.elf -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mlittle-endian -mthumb -Wl,--no-warn-rwx-segment -Wl,--wrap,fflush -Wl,--wrap,fflush_unlocked -Wl,--wrap,_fflush_r -Wl,--wrap,_fflush_unlocked_r -Wl,--wrap,printf -Wl,--wrap,printf_unlocked -Wl,--wrap,_printf_r -Wl,--wrap,_printf_unlocked_r -Wl,--wrap,putc -Wl,--wrap,putc_unlocked -Wl,--wrap,_putc_r -Wl,--wrap,_putc_unlocked_r -Wl,--wrap,putchar -Wl,--wrap,putchar_unlocked -Wl,--wrap,_putchar_r -Wl,--wrap,_putchar_unlocked_r -Wl,--wrap,puts -Wl,--wrap,puts_unlocked -Wl,--wrap,_puts_r -Wl,--wrap,_puts_unlocked_r -Wl,--wrap,snprintf -Wl,--wrap,snprintf_unlocked -Wl,--wrap,_snprintf_r -Wl,--wrap,_snprintf_unlocked_r -Wl,--wrap,vsnprintf -Wl,--wrap,vsnprintf_unlocked -Wl,--wrap,_vsnprintf_r -Wl,--wrap,_vsnprintf_unlocked_r -Wl,--wrap,__assert -Wl,--wrap,__assert_unlocked -Wl,--wrap,___assert_r -Wl,--wrap,___assert_unlocked_r -Wl,--wrap,__assert_func -Wl,--wrap,__assert_func_unlocked -Wl,--wrap,___assert_func_r -Wl,--wrap,___assert_func_unlocked_r -Wl,--wrap,setbuf -Wl,--wrap,setbuf_unlocked -Wl,--wrap,_setbuf_r -Wl,--wrap,_setbuf_unlocked_r -Wl,--wrap,setvbuf -Wl,--wrap,setvbuf_unlocked -Wl,--wrap,_setvbuf_r -Wl,--wrap,_setvbuf_unlocked_r -Wl,--wrap,fprintf -Wl,--wrap,fprintf_unlocked -Wl,--wrap,_fprintf_r -Wl,--wrap,_fprintf_unlocked_r -Wl,--wrap,vfprintf -Wl,--wrap,vfprintf_unlocked -Wl,--wrap,_vfprintf_r -Wl,--wrap,_vfprintf_unlocked_r -Wl,--wrap,vprintf -Wl,--wrap,vprintf_unlocked -Wl,--wrap,_vprintf_r -Wl,--wrap,_vprintf_unlocked_r -Wl,--wrap,fputc -Wl,--wrap,fputc_unlocked -Wl,--wrap,_fputc_r -Wl,--wrap,_fputc_unlocked_r -Wl,--wrap,fputs -Wl,--wrap,fputs_unlocked -Wl,--wrap,_fputs_r -Wl,--wrap,_fputs_unlocked_r -Wl,--wrap,sprintf -Wl,--wrap,sprintf_unlocked -Wl,--wrap,_sprintf_r -Wl,--wrap,_sprintf_unlocked_r -Wl,--wrap,asprintf -Wl,--wrap,asprintf_unlocked -Wl,--wrap,_asprintf_r -Wl,--wrap,_asprintf_unlocked_r -Wl,--wrap,vasprintf -Wl,--wrap,vasprintf_unlocked -Wl,--wrap,_vasprintf_r -Wl,--wrap,_vasprintf_unlocked_r -Wl,--wrap,asiprintf -Wl,--wrap,asiprintf_unlocked -Wl,--wrap,_asiprintf_r -Wl,--wrap,_asiprintf_unlocked_r -Wl,--wrap,asniprintf -Wl,--wrap,asniprintf_unlocked -Wl,--wrap,_asniprintf_r -Wl,--wrap,_asniprintf_unlocked_r -Wl,--wrap,asnprintf -Wl,--wrap,asnprintf_unlocked -Wl,--wrap,_asnprintf_r -Wl,--wrap,_asnprintf_unlocked_r -Wl,--wrap,diprintf -Wl,--wrap,diprintf_unlocked -Wl,--wrap,_diprintf_r -Wl,--wrap,_diprintf_unlocked_r -Wl,--wrap,fiprintf -Wl,--wrap,fiprintf_unlocked -Wl,--wrap,_fiprintf_r -Wl,--wrap,_fiprintf_unlocked_r -Wl,--wrap,iprintf -Wl,--wrap,iprintf_unlocked -Wl,--wrap,_iprintf_r -Wl,--wrap,_iprintf_unlocked_r -Wl,--wrap,siprintf -Wl,--wrap,siprintf_unlocked -Wl,--wrap,_siprintf_r -Wl,--wrap,_siprintf_unlocked_r -Wl,--wrap,sniprintf -Wl,--wrap,sniprintf_unlocked -Wl,--wrap,_sniprintf_r -Wl,--wrap,_sniprintf_unlocked_r -Wl,--wrap,vasiprintf -Wl,--wrap,vasiprintf_unlocked -Wl,--wrap,_vasiprintf_r -Wl,--wrap,_vasiprintf_unlocked_r -Wl,--wrap,vasniprintf -Wl,--wrap,vasniprintf_unlocked -Wl,--wrap,_vasniprintf_r -Wl,--wrap,_vasniprintf_unlocked_r -Wl,--wrap,vasnprintf -Wl,--wrap,vasnprintf_unlocked -Wl,--wrap,_vasnprintf_r -Wl,--wrap,_vasnprintf_unlocked_r -Wl,--wrap,vdiprintf -Wl,--wrap,vdiprintf_unlocked -Wl,--wrap,_vdiprintf_r -Wl,--wrap,_vdiprintf_unlocked_r -Wl,--wrap,vfiprintf -Wl,--wrap,vfiprintf_unlocked -Wl,--wrap,_vfiprintf_r -Wl,--wrap,_vfiprintf_unlocked_r -Wl,--wrap,viprintf -Wl,--wrap,viprintf_unlocked -Wl,--wrap,_viprintf_r -Wl,--wrap,_viprintf_unlocked_r -Wl,--wrap,vsiprintf -Wl,--wrap,vsiprintf_unlocked -Wl,--wrap,_vsiprintf_r -Wl,--wrap,_vsiprintf_unlocked_r -Wl,--wrap,vsniprintf -Wl,--wrap,vsniprintf_unlocked -Wl,--wrap,_vsniprintf_r -Wl,--wrap,_vsniprintf_unlocked_r -specs=nano.specs -Wl,--gc-sections -Wl,--undefined=uxTopUsedPriority -Wl,--wrap,_malloc_r -Wl,--wrap,_free_r -Wl,--wrap,_calloc_r -Wl,--wrap,_realloc_r -n -Xlinker -Map=build/f7-firmware-C/.extapps/dolphin_jump_d.elf.map -Ttargets/f7/application_ext.ld -Ur -Wl,-Ur -nostartfiles -mlong-calls -fno-common -nostdlib -Wl,--no-export-dynamic -fvisibility=hidden -Wl,-edolphin_jump_app build/f7-firmware-C/.extapps/dolphin_jump/Game.o build/f7-firmware-C/.extapps/dolphin_jump/dolphin_jump.o build/f7-firmware-C/.extapps/dolphin_jump/main.o build/f7-firmware-C/.extapps/dolphin_jump/dolphin_jump_icons.o -Lbuild/f7-firmware-C/lib -lm -lgcc -lstdc++ -lsupc++
arm-none-eabi-g++ @/var/folders/mj/qp601k_s0rx3cwsv6chm7_6h0000gn/T/tmp_yi0ce9y.lnk
API version 69.0 is up to date
prepare_app_metadata(["build/f7-firmware-C/.extapps/dolphin_jump.fap", "build/f7-firmware-C/.extapps/dolphin_jump/.fapmeta"], ["build/f7-firmware-C/.extapps/dolphin_jump_d.elf"])
arm-none-eabi-objcopy --remove-section .ARM.attributes --add-section .fapmeta=build/f7-firmware-C/.extapps/dolphin_jump/.fapmeta --set-section-flags .fapmeta=contents,noload,readonly,data --strip-debug --strip-unneeded --add-gnu-debuglink=build/f7-firmware-C/.extapps/dolphin_jump_d.elf build/f7-firmware-C/.extapps/dolphin_jump_d.elf build/f7-firmware-C/.extapps/dolphin_jump.fap
python3 scripts/fastfap.py build/f7-firmware-C/.extapps/dolphin_jump.fap arm-none-eabi-objcopy
_validate_app_imports(["build/f7-firmware-C/.extapps/dolphin_jump.impsyms"], ["build/f7-firmware-C/.extapps/dolphin_jump.fap"])

[skotopes]

To be honest that looks like issue with ISP.

@hedger @DrZlo13 FYI

[hedger]

@janwiesemann please provide source code for reproducing the issue.

[janwiesemann]

@hedger The example code can be found at https://github.com/janwiesemann/flipperzero-cpp-debugging-issue-example

I think a lot of issued might be caused by the -Os flag.

[janwiesemann]

@hedger I've just testet it with the WiFi Dev Board and backmagic. The same issue is present. My best guess is, that the optimization is messing with something and breaking some debugging stuff.

[EstebanFuentealba]

@hedger The example code can be found at https://github.com/janwiesemann/flipperzero-cpp-debugging-issue-example

I think a lot of issued might be caused by the -Os flag.

I also encountered different results when using ufbt and fbt. The issue was that ufbt applies the -Os optimization flag. My quick solution at the time was to use the following directive:

#pragma GCC optimize("O1")