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Fix off-by-one in set_thread_name which causes truncation to fail on Linux

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llvm-svn: 325069
This commit is contained in:
Sam McCall 2018-02-13 23:23:59 +00:00
parent e6e2436fba
commit 41b574ca17
1 changed files with 2 additions and 1 deletions
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3
lib/Support/Unix/Threading.inc
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@ -138,8 +138,9 @@ void llvm::set_thread_name(const Twine &Name) {
// terminated, but additionally the end of a long thread name will usually
// be more unique than the beginning, since a common pattern is for similar
// threads to share a common prefix.
// Note that the name length includes the null terminator.
if (get_max_thread_name_length() > 0)
NameStr = NameStr.take_back(get_max_thread_name_length());
NameStr = NameStr.take_back(get_max_thread_name_length() - 1);
(void)NameStr;
#if defined(__linux__)
#if (defined(__GLIBC__) && defined(_GNU_SOURCE)) || defined(__ANDROID__)