[Lldb-commits] [PATCH] D56293: Use the minidump exception record if present

[Greg Clayton via lldb-commits]

> On Jan 4, 2019, at 9:45 AM, Leonard Mosescu <mosescu at 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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