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Mail Archives: cygwin/2007/10/16/01:45:36

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From: =?ISO-8859-1?Q?Ren=E9_Berber?= <r DOT berber AT computer DOT org>

Subject: Re: [gdb] Data watchpoints in Windows weirdness. Call for testers.

Date: Tue, 16 Oct 2007 00:44:41 -0500

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Message-ID: <ff1j4b$m5n$1@ger.gmane.org>

References: <4702E6B7 DOT 8020100 AT portugalmail DOT pt> <20071008124331 DOT GD19254 AT calimero DOT vinschen DOT de> <20071008143552 DOT GA20746 AT ednor DOT casa DOT cgf DOT cx> <47115BEF DOT 7030407 AT portugalmail DOT pt> <ferqrc$ndc$1 AT ger DOT gmane DOT org> <47127845 DOT 5000905 AT portugalmail DOT pt> <20071015091947 DOT GS20400 AT calimero DOT vinschen DOT de> <4713B1FF DOT 4070709 AT portugalmail DOT pt>

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Pedro Alves wrote:

> Corinna Vinschen wrote:
>=20
>> I could reproduce it on Win2K SP4, Vista, and under WOW64 on Vista 64.
>=20
> Thank you.

Gdb 6.6 (installed with Insight 6.6) doesn't seem to have the problem:

GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...
(gdb) watch count
Hardware watchpoint 1: count
(gdb) start
Breakpoint 2 at 0x401075: file test.c, line 8.
Starting program: /home/rberber/test.exe
Hardware watchpoint 1: countHardware watchpoint 1: countHardware watchpoint=
 1:
countHardware watchpoint 1: countHardware watchpoint 1: countLoaded symbols=
 for
/c/WINDOWS/system32/ntdll.dll
Loaded symbols for /c/WINDOWS/system32/kernel32.dll
Loaded symbols for /usr/bin/cygwin1.dll
Loaded symbols for /c/WINDOWS/system32/advapi32.dll
Loaded symbols for /c/WINDOWS/system32/rpcrt4.dll
Hardware watchpoint 1: countHardware watchpoint 1: countHardware watchpoint=
 1:
countHardware watchpoint 1: countHardware watchpoint 1: countmain () at tes=
t.c:8
8	{
(gdb) c
Continuing.

Program received signal SIGTRAP, Trace/breakpoint trap.
main () at test.c:11
11	  printf ("count %d\n", count);
(gdb)
Continuing.
Hardware watchpoint 1: count

Old value =3D 0
New value =3D 1000
main () at test.c:16
16	      printf ("count %d\n", count);
(gdb)
Continuing.
Hardware watchpoint 1: count

Old value =3D 1000
New value =3D 1001
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
Hardware watchpoint 1: count

Old value =3D 1001
New value =3D 1002
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
Hardware watchpoint 1: count

Old value =3D 1002
New value =3D 1003
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
Hardware watchpoint 1: count

Old value =3D 1003
New value =3D 1004
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
Hardware watchpoint 1: count

Old value =3D 1004
New value =3D 1005
main () at test.c:18
18	      Sleep (1000);
...

One more time:

GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain condition=
s.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...
(gdb) watch count
Hardware watchpoint 1: count
(gdb) set debug infrun 1
(gdb) set debugevents 1
(gdb) set debugexceptions 1
(gdb) maint show-debug-regs 1
(gdb) start
Breakpoint 2 at 0x401075: file test.c, line 8.
Starting program: /home/rberber/test.exe
gdb: win32_init_thread_list
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DCREATE_PROCESS_DEBUG_EVE=
NT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_SPURIOUS
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_BREAKPOINT at 0x7c901230
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x7c901231
stopped_data_addr:
	CONTROL (DR7): 00000000          STATUS (DR6): 00000000
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: stopped
infrun: stop_stepping
Loaded symbols for /c/WINDOWS/system32/ntdll.dll
Loaded symbols for /c/WINDOWS/system32/kernel32.dll
Loaded symbols for /usr/bin/cygwin1.dll
Loaded symbols for /c/WINDOWS/system32/advapi32.dll
Loaded symbols for /c/WINDOWS/system32/rpcrt4.dll
infrun: proceed (addr=3D0xffffffff, signal=3D0, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000000
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DOUTPUT_DEBUG_STRING_EVEN=
T)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
gdb: kernel event for pid=3D1444 tid=3Dfc code=3DCREATE_THREAD_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_SPURIOUS
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D252, DBG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DOUTPUT_DEBUG_STRING_EVEN=
T)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DLOAD_DLL_DEBUG_EVENT)
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_LOADED
infrun: resume (step=3D0, signal=3D0)
Hardware watchpoint 1: countContinueDebugEvent (cpid=3D1444, ctid=3D2104, D=
BG_CONTINUE);
infrun: prepare_to_wait
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_BREAKPOINT at 0x00401075
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x401075
stopped_data_addr:
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000000
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): 00000000
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
main () at test.c:8
8	{
(gdb) c
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000000
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x00401099
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x401099
stopped_data_addr:
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000000
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: random signal 5

Program received signal SIGTRAP, Trace/breakpoint trap.
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): 00000000
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
main () at test.c:11
11	  printf ("count %d\n", count);
(gdb) c
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000000
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x004010b9
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x4010b9
watchpoint_hit (addr=3D403010, len=3D-1, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
Hardware watchpoint 1: count

Old value =3D 0
New value =3D 1000
main () at test.c:16
16	      printf ("count %d\n", count);
(gdb)
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x004010d9
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x4010d9
watchpoint_hit (addr=3D403010, len=3D-1, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000001
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): 00000001
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
Hardware watchpoint 1: count

Old value =3D 1000
New value =3D 1001
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): 00000001
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x004010d9
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x4010d9
watchpoint_hit (addr=3D403010, len=3D-1, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
Hardware watchpoint 1: count

Old value =3D 1001
New value =3D 1002
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x004010d9
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x4010d9
watchpoint_hit (addr=3D403010, len=3D-1, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
Hardware watchpoint 1: count

Old value =3D 1002
New value =3D 1003
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x004010d9
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x4010d9
watchpoint_hit (addr=3D403010, len=3D-1, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
Hardware watchpoint 1: count

Old value =3D 1003
New value =3D 1004
main () at test.c:18
18	      Sleep (1000);
(gdb)
Continuing.
infrun: proceed (addr=3D0xffffffff, signal=3D144, step=3D0)
insert_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: resume (step=3D0, signal=3D0)
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
infrun: wait_for_inferior
gdb: kernel event for pid=3D1444 tid=3D2104 code=3DEXCEPTION_DEBUG_EVENT)
gdb: Target exception EXCEPTION_SINGLE_STEP at 0x004010d9
infrun: infwait_normal_state
infrun: TARGET_WAITKIND_STOPPED
infrun: stop_pc =3D 0x4010d9
watchpoint_hit (addr=3D403010, len=3D-1, type=3Ddata-write):
	CONTROL (DR7): 000d0101          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00403010, ref.count=3D1  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
infrun: BPSTAT_WHAT_STOP_NOISY
infrun: stop_stepping
remove_watchpoint (addr=3D403010, len=3D4, type=3Ddata-write):
	CONTROL (DR7): 000d0100          STATUS (DR6): ffff0ff1
	DR0: addr=3D0x00000000, ref.count=3D0  DR1: addr=3D0x00000000, ref.count=
=3D0
	DR2: addr=3D0x00000000, ref.count=3D0  DR3: addr=3D0x00000000, ref.count=
=3D0
Hardware watchpoint 1: count

Old value =3D 1004
New value =3D 1005
main () at test.c:18
18	      Sleep (1000);
(gdb) ki
Kill the program being debugged? (y or n) y
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
ContinueDebugEvent (cpid=3D1444, ctid=3D252, DBG_CONTINUE);
ContinueDebugEvent (cpid=3D1444, ctid=3D2104, DBG_CONTINUE);
gdb: win32_close, inferior_ptid=3D2104
(gdb) q
--=20
Ren=E9 Berber


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webmaster	delorie software privacy
Copyright � 2019 by DJ Delorie	Updated Jul 2019

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Subject:	Re: [gdb] Data watchpoints in Windows weirdness. Call for testers.
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