From bruen...@google.com on August 10, 2011 08:09:51

Issue 549 has been merged into this issue.

From bruen...@google.com on September 22, 2011 13:17:17

we'll want the core to be the app context: xref issue #600

From bruen...@google.com on February 17, 2013 08:38:09

Labels: GoodContrib

From bruen...@google.com on November 12, 2013 09:55:40

xref issue #1378

From bruen...@google.com on May 05, 2014 18:10:41

For debugging strange self-interpretation bugs on the bots that I cannot reproduce even when I'm on the bot, I'm going to need to get a core dump so I'm going to implement at least some of this feature. I split minidumps off again as initially I will only support ldmps (invoking dbghelp to get minidumps within the process is not working: see issue #549 ).

Owner: bruen...@google.com

From bruen...@google.com on May 05, 2014 20:46:57

*** TODO w/o app context, or at least CONTEXT local var, ldmp is kind of hard to use

ChildEBP RetAddr

00 1a76d834 6d0adb37 dynamorio!os_dump_core_live_dump+0x26a [d:\derek\dr\git\src\core\win32\os.c @ 7069]
01 1a76d84c 6d091444 dynamorio!os_dump_core+0x57 [d:\derek\dr\git\src\core\win32\os.c @ 7279]
02 1a76d858 73a134cf dynamorio!dr_create_memory_dump+0x14 [d:\derek\dr\git\src\core\x86\instrument.c @ 2265]
03 1a76d888 73a0dc79 drmemorylib!dump_core+0x2f [d:\derek\drmemory\git\src\drmemory\report.c @ 2586]
04 1a76dab4 73a0c288 drmemorylib!report_error+0x1959 [d:\derek\drmemory\git\src\drmemory\report.c @ 2794]
05 1a76dcdc 73840de4 drmemorylib!report_unaddressable_access+0xe08 [d:\derek\drmemory\git\src\drmemory\report.c @ 3017]
06 1a76e3d4 73845637 drmemorylib!handle_mem_ref_internal+0x5584 [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 4882]
07 1a76e650 7381e9dd drmemorylib!check_mem_opnd+0x2ca7 [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 5054]
08 1a76ed08 73830233 drmemorylib!slow_path_with_mc+0x39ed [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 3486]
09 1a76eeb0 1a8d003a drmemorylib!slow_path+0x63 [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 3706]
WARNING: Frame IP not in any known module. Following frames may be wrong.
0a 1a76eebc 00000000 0x1a8d003a

Sure, I can use some windbg tricks to manually create a CONTEXT and
manually copy the mcontext fields over: but that's a pain. I propose,
until we have issue #600, creating a local var CONTEXT.

Here's an example w/ an uninit:

bin/drmemory.exe -dump_at_error_mask 2 -dr d:/derek/dr/git/exports -batch -- tests/registers.exe

Dr.M Error #20: UNINITIALIZED READ: reading register eax
Dr.M # 0 mmx_test [d:\derek\drmemory\git\src\tests\registers.c:390]
Dr.M # 1 main [d:\derek\drmemory\git\src\tests\registers.c:433]
Dr.M Note: @0:00:00.651 in thread 5752
Dr.M Note: instruction: cmp %eax $0x00000078
Dr.M Note: memory dump created at D:\derek\drmemory\git\build_x86_dbg\logs\dynamorio\registers.exe.6752.00000015.ldmp

ldmp logs/dynamorio/registers.exe.6752.00000015.ldmp cygpath -w "${DYNAMORIO_HOME}/bin32/dummy.exe"

windbg on dummy.exe:

0:000> $><d:\derek\dr\git\src\tools\windbg-scripts\load_syms
0:000> ~0s; kn
eax=00000000 ebx=00000000 ecx=00000200 edx=1f16ce98 esi=00001678 edi=73ca612c
eip=6f01357a esp=1f1bdeb0 ebp=1f1be37c iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206
dynamorio!os_dump_core_live_dump+0x26a:
6f01357a 83c404 add esp,4

ChildEBP RetAddr

00 1f1bdeec 6f013d08 dynamorio!os_dump_core_live_dump+0x26a [d:\derek\dr\git\src\core\win32\os.c @ 7064]
01 1f1bdf04 6f005650 dynamorio!os_dump_core_live+0x38 [d:\derek\dr\git\src\core\win32\os.c @ 7312]
02 1f1bdf14 73a1384c dynamorio!dr_create_memory_dump+0x20 [d:\derek\dr\git\src\core\x86\instrument.c @ 2268]
03 1f1be37c 73a0dc9e drmemorylib!report_core_dump+0x35c [d:\derek\drmemory\git\src\drmemory\report.c @ 2615]
04 1f1be5ac 73a26ae5 drmemorylib!report_error+0x197e [d:\derek\drmemory\git\src\drmemory\report.c @ 2796]
05 1f1be600 7384639a drmemorylib!report_undefined_read+0x65 [d:\derek\drmemory\git\src\drmemory\report.c @ 3036]
06 1f1be660 7381ef2e drmemorylib!check_register_defined+0x46a [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 5082]
07 1f1bed08 73830233 drmemorylib!slow_path_with_mc+0x3f3e [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 3506]
08 1f1beeb0 1f32003a drmemorylib!slow_path+0x63 [d:\derek\drmemory\git\src\drmemory\readwrite.c @ 3706]
WARNING: Frame IP not in any known module. Following frames may be wrong.
09 1f1beef0 6efbeb50 0x1f32003a
0a 1f1bef04 73a938bd dynamorio!heap_free+0x40 [d:\derek\dr\git\src\core\heap.c @ 3710]
0b 1f1bef20 00000000 drmemorylib!replace_native_xfer_target+0x3d [d:\derek\dr\git\src\ext\drwrap\drwrap.c @ 1346]
0:000> .frame 3
03 1f1be37c 73a0dc9e drmemorylib!report_core_dump+0x35c [d:\derek\drmemory\git\src\drmemory\report.c @ 2615]
0:000> dv
etp = 0x1f1be5c8
flags = 2
id = 0x14
mc = 0x1f1bed60
spec = struct _dr_memory_dump_spec_t
ldmp_path = char [260] "???"
cxt = struct _CONTEXT
0:000> .cxr @@(&cxt)
eax=00000038 ebx=7efde000 ecx=0042ff00 edx=00000000 esi=00000000 edi=00000000
eip=002d154a esp=0042fef8 ebp=0042ff10 iopl=0 nv up ei ng nz na pe nc
cs=0023 ss=002b ds=cccc es=cccc fs=cccc gs=cccc efl=00000286
registers!mmx_test+0x5a:
002d154a 83f878 cmp eax,78h
0:000> kn
*** Stack trace for last set context - .thread/.cxr resets it

ChildEBP RetAddr

00 0042ff10 002d15ae registers!mmx_test+0x5a [d:\derek\drmemory\git\src\tests\registers.c @ 390]
01 0042ff18 002d229b registers!main+0x4e [d:\derek\drmemory\git\src\tests\registers.c @ 435]
02 0042ff60 7636338a registers!__tmainCRTStartup+0x10b [f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c @ 278]
03 0042ff6c 77b59f72 kernel32!BaseThreadInitThunk+0xe
04 0042ffac 77b59f45 ntdll!__RtlUserThreadStart+0x70
05 0042ffc4 00000000 ntdll!_RtlUserThreadStart+0x1b