clayborg added inline comments.
================
Comment at: source/Plugins/Process/elf-core/ProcessElfCore.cpp:668
return status.ToError();
- thread_data.name = prpsinfo.pr_fname;
+ thread_data.name.assign (prpsinfo.pr_fname, sizeof (prpsinfo.pr_fname));
SetID(prpsinfo.pr_pid);
----------------
labath wrote:
> In case the name *is* null-terminated, this will forcibly include the \0
> bytes into the string, which is not good.
> I think this should be something like `assign(pr_fname, strnlen(pr_fname,
> sizeof(pf_fname))` (maybe there is a more c++-y way of writing that, but I
> couldn't think of one).
>
> I think adding a check for the thread name in the test still has value (asan
> will just check we don't do anything stupid, but it won't verify we actually
> produce the right name in the end), but I can do that as a follow-up.
This is how we cap segment lengths on ObjectFileMachO:
```
ConstString const_segname(load_cmd.segname,
std::min<size_t>(strlen(load_cmd.segname), sizeof(load_cmd.segname)));
```
This won't keep ASAN happy though as the strlen might go off the end. You might
be able to check the last byte since I am guessing they will zero fill by
default:
```
if (prpsinfo.pr_fname[sizeof (prpsinfo.pr_fname)-1] != '\0')
thread_data.name.assign (prpsinfo.pr_fname, sizeof (prpsinfo.pr_fname));
else
thread_data.name = prpsinfo.pr_fname;
```
Repository:
rL LLVM
https://reviews.llvm.org/D42828
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