Windows can't handle paths longer than 260 code points without \\?\. Even
with \\?\ it can't handle path components longer than 255 code points. So
limit graph names to the arbitrary length of 140. Random characters are still
added to the end, so it's ok if graph names collide.
Differential Revision: http://reviews.llvm.org/D3883
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209483
91177308-0d34-0410-b5e6-
96231b3b80d8
std::string WriteGraph(const GraphType &G, const Twine &Name,
bool ShortNames = false, const Twine &Title = "") {
int FD;
- std::string Filename = createGraphFilename(Name, FD);
+ // Windows can't always handle long paths, so limit the length of the name.
+ std::string N = Name.str();
+ N = N.substr(0, std::min<std::size_t>(N.size(), 140));
+ std::string Filename = createGraphFilename(N, FD);
raw_fd_ostream O(FD, /*shouldClose=*/ true);
if (FD == -1) {