Waiiiiiiit a second. Why don't we just teach obj2yaml and yaml2obj to
round-trip minidumps? This way you could run it on a minidump, then
hand-edit it to customize some bits you want to change, then check in the
yaml.
On Fri, Jan 4, 2019 at 10:56 AM Greg Clayton <clayb...@gmail.com> wrote:
>
> On Jan 4, 2019, at 9:45 AM, Leonard Mosescu <mose...@google.com> wrote:
>
> I have a minidump generator if you need me to make any specific minidump
>> files for you.
>>
>
> Maybe not in this case, but it seems an interesting idea. What are the
> capabilities of this generator tool?
>
>
> I can generate threads contexts, any of the textual directory streams,
> memory regions (32 and 64), module lists, and more.
>
> Example code from my python "minidump" module that shows generation of a
> minidump. Not all of this goes together (example code for ARM and ARM64),
> but it shows what you can easily do:
>
> system_info = minidump.SystemInfo(
> ProcessorArchitecture=minidump.PROCESSOR_ARCHITECTURE_ARM64,
> PlatformId=minidump.VER_PLATFORM_LINUX,
> CSDVersion=minidump.String('15E216'))
>
> md = minidump.Generator(system_info, ProcessId=123)
>
> x = []
> v = []
> for i in range(32):
> x.append(i+1 | i+2 << 32 | i+3 << 48)
> for i in range(32):
> for j in range(16):
> v.append(i+j)
>
> thread = minidump.Thread(ThreadId=0x1000,
> Registers=minidump.ThreadContext_ARM64(
> x=x, pc=0x1000, cpsr=0x11223344,
> fpsr=0x55667788, fpcr=0x99AABBCC, v=v))
>
> system_info = minidump.SystemInfo(
> ProcessorArchitecture=minidump.PROCESSOR_ARCHITECTURE_ARM,
> PlatformId=minidump.VER_PLATFORM_MACOSX,
> CSDVersion=minidump.String('ABC123'))
>
> md = minidump.Generator(system_info, ProcessId=123)
>
> r = []
> d = []
> extra = []
> for i in range(1, 17):
> r.append(i)
> for i in range(1, 33):
> d.append(i | i << 8 | i << 32 | i << 48)
> for i in range(8):
> extra.append(i | i << 16)
>
> thread = minidump.Thread(ThreadId=0x1000,
> Registers=minidump.ThreadContext_ARM(
> r=r, cpsr=0x11223344,
> fpscr=0x55667788AABBCCDD, d=d,
> extra=extra))
> md.add_thread(thread)
> md.add_thread(minidump.Thread(ThreadId=0x55667788))
>
> md.add_module(minidump.Module(BaseOfImage=0x10000,
> SizeOfImage=0x2000,
> CheckSum=0,
> TimeDateStamp=0,
> ModuleName="/tmp/b",
> VersionInfo=None,
> CvRecord=None,
> MiscRecord=None,
> Reserved0=0,
> Reserved1=0))
>
> md.add_module(minidump.Module(BaseOfImage=0x2000,
> SizeOfImage=0x1000,
> CheckSum=0,
> TimeDateStamp=0,
> ModuleName="/tmp/a",
> VersionInfo=None,
> CvRecord=None,
> MiscRecord=None,
> Reserved0=0,
> Reserved1=0))
>
> md.add_module(minidump.Module(BaseOfImage=0x1000,
> SizeOfImage=0x1000,
> CheckSum=0,
> TimeDateStamp=0,
> ModuleName="/tmp/b",
> VersionInfo=None,
> CvRecord=None,
> MiscRecord=None,
> Reserved0=0,
> Reserved1=0))
>
>
> md.add_module(minidump.Module(BaseOfImage=0x5000,
> SizeOfImage=0x3000,
> CheckSum=0,
> TimeDateStamp=0,
> ModuleName="/tmp/b",
> VersionInfo=None,
> CvRecord=None,
> MiscRecord=None,
> Reserved0=0,
> Reserved1=0))
> md.add_memory(minidump.MemoryDescriptor(StartOfMemoryRange=0x8000,
> Bytes='Hello world!'))
> md.add_memory(minidump.MemoryDescriptor(StartOfMemoryRange=0x8010,
> Bytes='Goodbye moon...'))
> md.add_memory64(minidump.MemoryDescriptor64(StartOfMemoryRange=0x1000,
> Bytes='1' * 16))
> md.add_memory64(minidump.MemoryDescriptor64(StartOfMemoryRange=0x2000,
> Bytes='3' * 32))
>
> md.add_memory(minidump.MemoryDescriptor(StartOfMemoryRange=0x1000,
> Bytes='1' * 16))
> md.add_memory(minidump.MemoryDescriptor(StartOfMemoryRange=0x2000,
> Bytes='3' * 32))
>
> maps = '''400d9000-400db000 r-xp 00000000 b3:04 227
> /system/bin/app_process
> 400db000-400dc000 r--p 00001000 b3:04 227 /system/bin/app_process
> 400dc000-400dd000 rw-p 00000000 00:00 0
> '''
> md.add_stream_as_string(minidump.BreakpadLinuxMaps, maps)
> pad = True
> addr_size = 4
> md.save("/tmp/minidump.dmp", addr_size, pad)
>
>
>
>
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