[0.26.1] target kv11z75 FlashEraseFailure: erase_sector(0x400) error

Reproduce steps

• Flash a program(hello_world) to board hvpkv11z75m with GDB.
• Reprogram any another application to board, the gdb server will raise error FlashEraseFailure: erase_sector(0x400) error: 105

gdb server:
pyocd gdbserver --trust-crc --port 3800 -u A020000028634e4500585002673a003fa101000097969900 -v -t kv11z7 -O connect_mode=under-reset -O allow_no_cores=True

Note

• This issue happens very regularly in second flash programming.
• Tested on 0.14, it works fine.

$ pyocd gdbserver --trust-crc --port 3800 -u A020000028634e4500585002673a003fa101000097969900 -v -t kv11z7 -O connect_mode=under-reset -O allow_no_cores=True

0001286:INFO:board:Target type is kv11z7
0001286:DEBUG:dap_access_cmsis_dap:CMSIS-DAP probe A020000028634e4500585002673a003fa101000097969900 firmware version: 1.0
0001302:DEBUG:sequencer:Running task load_svd
0001302:DEBUG:sequencer:Running task pre_connect
0001302:INFO:coresight_target:Asserting reset prior to connect
0001302:DEBUG:sequencer:Running task dp_init
0001302:DEBUG:sequencer:Running task connect
0001318:DEBUG:dap:Default wire protocol selected; using SWD
0001318:DEBUG:swj:Sending deprecated SWJ sequence to select SWD
0001334:INFO:dap:DP IDR = 0x0bc11477 (v1 MINDP rev0)
0001334:DEBUG:sequencer:Running task clear_sticky_err
0001334:DEBUG:sequencer:Running task power_up_debug
0001334:DEBUG:sequencer:Running task create_discoverer
0001334:DEBUG:sequencer:Running task discovery
0001334:DEBUG:sequencer:Running task find_aps
0001348:DEBUG:sequencer:Running task create_aps
0001348:DEBUG:sequencer:Running task create_ap.0
0001348:INFO:ap:AP#0 IDR = 0x04770031 (AHB-AP var3 rev0)
0001348:DEBUG:ap:AP#0 default HPROT=3 HNONSEC=0
0001348:DEBUG:ap:AP#0 implemented HPROT=3 HNONSEC=0
0001365:DEBUG:sequencer:Running task create_ap.1
0001365:INFO:ap:AP#1 IDR = 0x001c0020 (proprietary)
0001365:DEBUG:sequencer:Running task check_mdm_ap_idr
0001365:DEBUG:target_kinetis:MDM-AP version 2
0001365:DEBUG:sequencer:Running task check_flash_security
0001411:INFO:target_kinetis:KV11Z7 not in secure state
0001411:DEBUG:sequencer:Running task find_components
0001411:DEBUG:sequencer:Running task init_ap.0
0001427:INFO:rom_table:AP#0 Class 0x1 ROM table #0 @ 0xf0002000 (designer=00e part=000)
0001443:INFO:rom_table:[0]<f0000000:MTB-M0+ class=9 designer=43b part=932 devtype=31 archid=0a31 devid=0:0:0>
0001443:INFO:rom_table:[1]<f0001000:MTBDWT class=9 designer=00e part=000 devtype=04 archid=0000 devid=0:0:0>
0001459:INFO:rom_table:[2]<e00ff000:ROM class=1 designer=43b part=4c0>
0001459:INFO:rom_table:  AP#0 Class 0x1 ROM table #1 @ 0xe00ff000 (designer=43b part=4c0)
0001459:INFO:rom_table:  [0]<e000e000:SCS-M0+ class=14 designer=43b part=008>
0001473:INFO:rom_table:  [1]<e0001000:DWT-M0+ class=14 designer=43b part=00a>
0001473:INFO:rom_table:  [2]<e0002000:BPU class=14 designer=43b part=00b>
0001473:DEBUG:sequencer:Running task create_cores
0001473:DEBUG:discovery:Creating SCS-M0+ component
0001490:INFO:cortex_m:CPU core #0 is Cortex-M0+ r0p1
0001490:DEBUG:sequencer:Running task create_components
0001490:DEBUG:discovery:Creating DWT-M0+ component
0001490:INFO:dwt:2 hardware watchpoints
0001490:DEBUG:discovery:Creating BPU component
0001490:INFO:fpb:2 hardware breakpoints, 0 literal comparators
0001490:DEBUG:fpb:fpb has been disabled
0001490:DEBUG:sequencer:Running task check_for_cores
0001490:DEBUG:sequencer:Running task halt_on_connect
0001490:INFO:target_kinetis:Configuring MDM-AP to halt when coming out of reset
0001505:DEBUG:sequencer:Running task post_connect
0001505:INFO:target_kinetis:Deasserting reset post connect
0001505:DEBUG:sequencer:Running task post_connect_hook
0001505:DEBUG:sequencer:Running task create_flash
0001505:DEBUG:sequencer:Running task notify
0001521:DEBUG:cortex_m:Setting vector catch to 0x00000001
0001521:INFO:server:Semihost server started on port 4444 (core 0)
0001521:INFO:gdbserver:GDB server started on port 3800 (core 0)
0001521:DEBUG:cortex_m:halting core 0
0002036:DEBUG:packet_io:Starting GDB server packet I/O thread
0002036:INFO:gdbserver:One client connected!
0002051:DEBUG:gdbserver:GDB received query: ['Supported', 'multiprocess+;swbreak+;hwbreak+;qRelocInsn+;fork-events+;vfork-events+;exec-events+;vContSupported+;QThreadEvents+;no-resumed+#df']
0002082:DEBUG:gdbserver:GDB general set: StartNoAckMode
0002114:DEBUG:gdbserver:GDB received query: ['Xfer', 'features', 'read', 'target.xml', '0,7fb#4a']
0002114:DEBUG:gdbserver:GDB query read_feature: offset: 0, size: 2043
0002128:DEBUG:gdbserver:GDB general set: NonStop:0
0002144:DEBUG:gdbserver:GDB received query: ['TStatus#49']
0002161:DEBUG:gdbserver:Current thread 0 is no longer valid, switching context to target
0002161:DEBUG:register:no accesses
0002161:DEBUG:register:out of date run token; invalidating cache
0002176:DEBUG:gdbserver:Tresponse=T0507:c00000c0;0d:682f0020;0e:c1130000;0f:68120000;thread:1;
0002192:DEBUG:gdbserver:GDB received query: ['Xfer', 'threads', 'read', '', '0,7fb#d0']
0002192:DEBUG:gdbserver:GDB query threads: offset: 0, size: 2043
0002207:DEBUG:gdbserver:GDB received query: ['Attached#8f']
0002239:DEBUG:gdbserver:GDB received query: ['Xfer', 'threads', 'read', '', '0,7fb#d0']
0002239:DEBUG:gdbserver:GDB query threads: offset: 0, size: 2043
0002253:DEBUG:gdbserver:GDB received query: ['Xfer', 'memory-map', 'read', '', '0,7fb#e9']
0002253:DEBUG:gdbserver:GDB query memory_map: offset: 0, size: 2043
0002269:DEBUG:memory:no reads
0002269:DEBUG:memory:out of date run token; invalidating cache
0002285:DEBUG:context_facade:GDB getting register context
0002301:DEBUG:context_facade:GDB reg: r0 = 0x4006B000
0002301:DEBUG:context_facade:GDB reg: r1 = 0x0
0002301:DEBUG:context_facade:GDB reg: r2 = 0x0
0002301:DEBUG:context_facade:GDB reg: r3 = 0x1660
0002301:DEBUG:context_facade:GDB reg: r4 = 0x4006B000
0002301:DEBUG:context_facade:GDB reg: r5 = 0x0
0002301:DEBUG:context_facade:GDB reg: r6 = 0x3EE
0002301:DEBUG:context_facade:GDB reg: r7 = 0xC00000C0
0002301:DEBUG:context_facade:GDB reg: r8 = 0xE87FF9FF
0002301:DEBUG:context_facade:GDB reg: r9 = 0x2000065C
0002301:DEBUG:context_facade:GDB reg: r10 = 0xFFEFFEFF
0002301:DEBUG:context_facade:GDB reg: r11 = 0x7FDC5F3E
0002301:DEBUG:context_facade:GDB reg: r12 = 0x1
0002301:DEBUG:context_facade:GDB reg: sp = 0x20002F68
0002301:DEBUG:context_facade:GDB reg: lr = 0x13C1
0002301:DEBUG:context_facade:GDB reg: pc = 0x1268
0002301:DEBUG:context_facade:GDB reg: msp = 0x20002F68
0002301:DEBUG:context_facade:GDB reg: psp = 0xEFDCFEDC
0002301:DEBUG:context_facade:GDB reg: primask = 0x0
0002301:DEBUG:context_facade:GDB reg: xpsr = 0x61000000
0002301:DEBUG:context_facade:GDB reg: control = 0x0
0002348:DEBUG:gdbserver:flash op: FlashErase
0002363:DEBUG:gdbserver:flash op: FlashWrite
0002363:DEBUG:gdbserver:flash write addr: 0x0
0002378:DEBUG:gdbserver:flash op: FlashWrite
0002378:DEBUG:gdbserver:flash write addr: 0x7e0
0002394:DEBUG:gdbserver:flash op: FlashWrite
0002394:DEBUG:gdbserver:flash write addr: 0xfa0
0002410:DEBUG:gdbserver:flash op: FlashDone#ea
0002410:DEBUG:cortex_m:halting core 0
0002410:DEBUG:cortex_m:set reset catch, core 0
0002410:DEBUG:cortex_m:halting core 0
0002410:DEBUG:cortex_m:reset, core 0, type=SW_SYSTEM
0002410:DEBUG:gdbserver:Received POST_RESET event
0002426:DEBUG:cortex_m:clear reset catch, core 0
0002473:DEBUG:cortex_m:resuming core 0
0002473:DEBUG:manager:added=[] removed=[]
0002473:DEBUG:manager:bps after flush={}
0002503:DEBUG:cortex_m:resuming core 0
0002503:DEBUG:manager:added=[] removed=[]
0002503:DEBUG:manager:bps after flush={}
0002519:DEBUG:builder:Analyze time: 0.031000
0002519:DEBUG:builder:Using double buffer sector erase program

[---|---|---|---|---|---|---|---|---|----]

[0002519:DEBUG:cortex_m:halting core 0
0002535:DEBUG:cortex_m:resuming core 0
0002535:DEBUG:manager:added=[] removed=[]
0002535:DEBUG:manager:bps after flush={}
0002551:DEBUG:cortex_m:resuming core 0
0002551:DEBUG:manager:added=[] removed=[]
0002551:DEBUG:manager:bps after flush={}
0002582:DEBUG:cortex_m:resuming core 0
0002582:DEBUG:manager:added=[] removed=[]
0002582:DEBUG:manager:bps after flush={}
0002597:ERROR:gdbserver:Unhandled exception in handle_message: erase_sector(0x400) error: 105
Traceback (most recent call last):
  File "c:\python27\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 383, in handle_message
    reply = handler(msg[msgStart:])
  File "c:\python27\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 602, in v_command
    return self.flash_op(data)
  File "c:\python27\lib\site-packages\pyocd\gdbserver\gdbserver.py", line 719, in flash_op
    self.flash_loader.commit()
  File "c:\python27\lib\site-packages\pyocd\flash\loader.py", line 168, in commit
    keep_unwritten=self._keep_unwritten)
  File "c:\python27\lib\site-packages\pyocd\flash\builder.py", line 470, in program
    flash_operation = self._sector_erase_program_double_buffer(progress_cb)
  File "c:\python27\lib\site-packages\pyocd\flash\builder.py", line 867, in _sector_erase_program_double_buffer
    self.flash.erase_sector(sector.addr)
  File "c:\python27\lib\site-packages\pyocd\flash\flash.py", line 353, in erase_sector
    raise FlashEraseFailure('erase_sector(0x%x) error: %i' % (address, result), address, result)
FlashEraseFailure: erase_sector(0x400) error: 105
0002628:INFO:gdbserver:Client detached
0002628:INFO:gdbserver:Client disconnected!
0002628:DEBUG:gdbserver:GDB server cleaning up
0002628:DEBUG:packet_io:GDB packet thread: other side closed connection
0002628:DEBUG:packet_io:GDB packet thread stopping
0003065:INFO:server:Semihost server stopped
0003081:DEBUG:session:uninit session <pyocd.core.session.Session object at 0x02749D50>
0003081:DEBUG:board:uninit board <pyocd.board.mbed_board.MbedBoard object at 0x036ABFD0>
0003081:DEBUG:cortex_m:resuming core 0
0003081:DEBUG:manager:added=[] removed=[]
0003081:DEBUG:manager:bps after flush={}
0003097:DEBUG:pywinusb_backend:closing interface

Reproduce the second-programming failure on the KV11Z7 with the documented pyocd gdbserver command. Start in pyocd/flash/builder.py at _sector_erase_program_double_buffer and follow flash/flash.py: erase_sector; the traceback also identifies gdbserver/gdbserver.py as the caller. Done means reprogramming a second application completes without the erase_sector(0x400) error.