[LLVMdev] SymbolRef and getSize

[Wehrli Johan]

Ok thanks for the answer. I will try the computeSymbolSizes.

Johan


> On 15 Jul 2015, at 18:07, Benjamin Kramer <benny.kra at gmail.com> wrote:
> 
> 
>> On 15.07.2015, at 17:52, Wehrli Johan <johan.wehrli at heig-vd.ch> wrote:
>> 
>> 
>> Hi everyone,
>> 
>> I’m currently playing with the clang driver and I encounter a strange bug.
>> 
>> It occurs when I used the getSize function from the SymbolRef class.
>> 
>> On iOS, the number returned is not always correct (some function have the right size).
> 
> Only ELF has usable size information, MachO and COFF do not. That's also the reason why SymbolRef::getSize doesn't exist anymore in LLVM trunk. To get the real sizes you can either use the address trick used by MachODump.cpp or use computeSymbolSizes which wraps this in a convenient API.
> 
> - Ben
> 
>> 
>> Sadly,
>> 
>> This is my code (at the end of the main function into driver.cpp) :
>> 
>> ####
>> 
>> ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(file);
>> if (std::error_code ec = BinaryOrErr.getError()) {
>> return ec.value();
>> }
>> 
>> Binary &Binary = *BinaryOrErr.get().getBinary();
>> object::ObjectFile *objfile;
>> 
>> objfile = dyn_cast<ObjectFile>(&Binary);
>> 
>> for (const SymbolRef &Symbol : objfile->symbols()) {
>> uint64_t size;
>> Symbol.getAddress(size);
>> 
>> }
>> 
>> ####
>> 
>> During my previous search, I check machODump.cpp in order to see of the list all the function.
>> 
>> They never use the getSize() but they use the address (getAddress()) of the next function.
>> 
>> Does anyone have ever heard of a bug with this function or did I do something wrong?
>> 
>> Greeting,
>> 
>> Johan Wehrli
>> 
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>