Debug: use proper hook for handle_exit in flipperapps (#3842)

* Debug: use proper hook for handle_exit in flipperapps
* fbt: flash firmware for `blackmagic` target

Co-authored-by: hedger <hedger@nanode.su>
Co-authored-by: Georgii Surkov <37121527+gsurkov@users.noreply.github.com>

Author: 3 people

SConstruct

@@ -234,14 +234,15 @@ firmware_debug = distenv.PhonyTarget(
 )
 distenv.Depends(firmware_debug, firmware_flash)
 
-distenv.PhonyTarget(
+firmware_blackmagic = distenv.PhonyTarget(
     "blackmagic",
     "${GDBPYCOM}",
     source=firmware_env["FW_ELF"],
     GDBOPTS="${GDBOPTS_BASE} ${GDBOPTS_BLACKMAGIC}",
     GDBREMOTE="${BLACKMAGIC_ADDR}",
     FBT_FAP_DEBUG_ELF_ROOT=firmware_env["FBT_FAP_DEBUG_ELF_ROOT"],
 )
+distenv.Depends(firmware_blackmagic, firmware_flash)
 
 # Debug alien elf
 debug_other_opts = [

scripts/debug/flipperapps.py

@@ -124,7 +124,7 @@ def invoke(self, arg, from_tty):
             print(f"Set '{arg}' as debug info lookup path for Flipper external apps")
             helper.attach_to_fw()
             gdb.events.stop.connect(helper.handle_stop)
-            gdb.events.exited.connect(helper.handle_exit)
+            gdb.events.gdb_exiting.connect(helper.handle_exit)
         except gdb.error as e:
             print(f"Support for Flipper external apps debug is not available: {e}")