> On Sep 19, 2016, at 10:33 AM, Lei Kong <leik...@msn.com> wrote:
>
> You are right, it seems the argument is out of range, both vtableAddr and
> vtableAddr-8 are “8.5” byte long. Maybe there is something wrong with the way
> I get vtableAddress? I will clean up my full script and send it to you if the
> following does not provide enough information, thanks much.
>
> def vtable_addr (vtableSymbol):
> return vtableSymbol.addr.section.file_addr + vtableSymbol.addr.offset +
> 0x10
You actually want to get the load address when reading from memory. This should
be:
def vtable_addr (vtableSymbol, target):
return vtableSymbol.addr.GetLoadAddress(target) + 0x10
>
>
> vtableAddr, type=<type 'long'>, value=0x1000000000000000f
> vtableAddr-8, type=<type 'long'>, value=0x10000000000000007
> Traceback (most recent call last):
> File "<input>", line 1, in <module>
> File "/home/leikong/repo/WindowsFabric/build.prod/test/fabdbg.py", line
> 199, in findall
> findtypes(pattern,ignorePureVirtualType)
> File "/home/leikong/repo/WindowsFabric/build.prod/test/fabdbg.py", line
> 156, in findtypes
> if ignorePureVirtualType and has_pure_virtual(vtableAddr,
> pureVirtualFuncs) :
> File "/home/leikong/repo/WindowsFabric/build.prod/test/fabdbg.py", line
> 100, in has_pure_virtual
> vtableEndAddr = lldb.process.ReadPointerFromMemory(vtableAddr-8, error)
> File "/home/leikong/bin/lldb/lib/python2.7/site-packages/lldb/__init__.py",
> line 9418, in ReadPointerFromMemory
> return _lldb.SBProcess_ReadPointerFromMemory(self, addr, error)
> OverflowError: in method 'SBProcess_ReadPointerFromMemory', argument 2 of
> type 'lldb::addr_t'
>
> From: Greg Clayton
> Sent: Monday, September 19, 2016 09:12 AM
> To: Lei Kong
> Cc: Jim Ingham; lldb-dev@lists.llvm.org
> Subject: Re: [lldb-dev] OverflowError: in method
> 'SBProcess_ReadPointerFromMemory', argument 2 of type 'lldb::addr_t'
>
> Try printing the type of the value you are passing in the line:
>
> vtableEndAddr = lldb.process.ReadPointerFromMemory(vtableAddr-8, error)
>
> print type(vtableAddr)
> print type(vtableAddr-8)
>
> It seems like it thinks vtableAddr doesn't fit into a lldb::addr_t which is a
> uint64_t
>
>
>
> > On Sep 16, 2016, at 7:39 PM, Lei Kong via lldb-dev
> > <lldb-dev@lists.llvm.org> wrote:
> >
> > I tried printing error.descryption, but it didn't work, because when the
> > error happens, it seems ReadPointerFromMemory never returned to my code.
> >
> >
> > read from address 0000000001223f68
> > Traceback (most recent call last):
> > File "<input>", line 1, in <module>
> > File "/home/leikong/repo/WindowsFabric/build.prod/test/fabdbg.py", line
> > 289, in findall
> > findtypes(pattern,ignorePureVirtualType)
> > File "/home/leikong/repo/WindowsFabric/build.prod/test/fabdbg.py", line
> > 246, in findtypes
> > if ignorePureVirtualType and has_pure_virtual(vtableAddr,
> > pureVirtualFuncs) :
> > File "/home/leikong/repo/WindowsFabric/build.prod/test/fabdbg.py", line
> > 190, in has_pure_virtual
> > vtableEndAddr = lldb.process.ReadPointerFromMemory(vtableAddr-8, error)
> > File
> > "/home/leikong/bin/lldb/lib/python2.7/site-packages/lldb/__init__.py", line
> > 9418, in ReadPointerFromMemory
> > return _lldb.SBProcess_ReadPointerFromMemory(self, addr, error)
> > OverflowError: in method 'SBProcess_ReadPointerFromMemory', argument 2 of
> > type 'lldb::addr_t'
> >
> >
> > > Subject: Re: [lldb-dev] OverflowError: in method
> > > 'SBProcess_ReadPointerFromMemory', argument 2 of type 'lldb::addr_t'
> > > From: jing...@apple.com
> > > Date: Fri, 16 Sep 2016 17:12:24 -0700
> > > CC: lldb-dev@lists.llvm.org
> > > To: leik...@msn.com
> > >
> > > You passed an error into ReadPointerFromMemory. In the cases where you
> > > aren't getting what you expect, what does that error say?
> > >
> > > Jim
> > >
> > > > On Sep 16, 2016, at 5:06 PM, Lei Kong via lldb-dev
> > > > <lldb-dev@lists.llvm.org> wrote:
> > > >
> > > > I ran into the error in the subject when running a python script with
> > > > "script myfile.myscript()".
> > > >
> > > > The value addr_t parameter used is 0x0000000001223f68, the following
> > > > works fine:
> > > >
> > > > (lldb) scr
> > > > Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or
> > > > Ctrl-D.
> > > > >>> e = lldb.SBError()
> > > > >>> ptr = lldb.process.ReadPointerFromMemory(0x0000000001223f68, e)
> > > > >>> print ptr
> > > > 0
> > > > >>>
> > > >
> > > > Any suggestion how to further investigate? Thanks.
> > > >
> > > > myfile.myscript() calls the following function in a loop (iterate
> > > > through all vtable symbols), which contains the call
> > > > ReadPointerFromMemory.
> > > >
> > > > def dump_vtbl(vtableAddr) :
> > > > error = lldb.SBError()
> > > > vtableEndAddr = lldb.process.ReadPointerFromMemory(vtableAddr+8, error)
> > > > if not error.success :
> > > > return False
> > > > print "vtable: [%0.16x, %0.16x)" % (vtableAddr, vtableEndAddr)
> > > > for addr in range(vtableAddr, vtableEndAddr, 8) :
> > > > print "read from address %.016x" % addr
> > > > try:
> > > > funcAddr = lldb.process.ReadPointerFromMemory(addr, error)
> > > > except:
> > > > sys.exc_clear()
> > > > continue
> > > > if not error.success :
> > > > continue
> > > >
> > > > _______________________________________________
> > > > lldb-dev mailing list
> > > > lldb-dev@lists.llvm.org
> > > > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
> > >
> > _______________________________________________
> > lldb-dev mailing list
> > lldb-dev@lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
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