duane> Slowly target resources are consumed/leaked - specifically hardware
duane> compare registers.
duane> Suggestions?
BTW - this can also be caused by GDB croaking.. while leaving the target
running.
Examples - SVN 2408 - adds some useful debug information to help see
this problem
The general idea is a "unique id" for each breakpoint/watchpoint -
ie: BPID.. below.
Here, a breakpoint was added, the target went off a clif - and now GDB
cannot *remove* the breakpoint because the target is in a bad state.
Leak example.
>> Debug: 1164 124671 gdb_server.c:2050 gdb_input_inner(): received
packet: 'Z1,800c0,2'
>> Debug: 1165 124671 gdb_server.c:1385
gdb_breakpoint_watchpoint_packet(): -
>> Debug: 1166 124671 target.c:1408 target_write_u32(): address:
0xe000201c, value: 0x400800c1
>> Debug: 1167 124671 cortex_m3.c:926 cortex_m3_set_breakpoint():
fpc_num 5 fpcr_value 0x400800c1
>> Debug: 1168 124671 cortex_m3.c:953 cortex_m3_set_breakpoint(): BPID:
6, Type: 0, Address: 0x000800c0 Length: 2 (set=6)
>> Debug: 1169 124671 breakpoints.c:104 breakpoint_add(): added
hardware breakpoint at 0x000800c0 of length 0x00000002, (BPID: 6)
>> Debug: 1170 124671 gdb_server.c:2050 gdb_input_inner(): received
packet: 's'
>> Debug: 1171 124671 gdb_server.c:2050 gdb_input_inner(): received
packet: 'g'
>> Debug: 1172 124671 gdb_server.c:2050 gdb_input_inner(): received
packet: 'z1,800c0,2'
>> Debug: 1173 124671 gdb_server.c:1385
gdb_breakpoint_watchpoint_packet(): -
>> Warn : 1174 124671 cortex_m3.c:1072 cortex_m3_remove_breakpoint():
target not halted
>> Debug: 1175 124671 breakpoints.c:128 breakpoint_free(): BPID: 6
Example of final failure:
>> Debug: 1911 139921 gdb_server.c:2050 gdb_input_inner(): received
packet: 'Z1,800c0,2'
>> Debug: 1912 139921 gdb_server.c:1385
gdb_breakpoint_watchpoint_packet(): -
>> Info : 1913 139937 cortex_m3.c:1047 cortex_m3_add_breakpoint(): no
flash patch comparator unit available for hardware breakpoint
>> Info : 1914 139937 breakpoints.c:81 breakpoint_add(): can't add
hardware breakpoint, resource not available (BPID=7)
-Duane.
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