Fix off-by-one in set_thread_name which causes truncation to fail on Linux
llvm-svn: 325069
diff --git a/llvm/lib/Support/Unix/Threading.inc b/llvm/lib/Support/Unix/Threading.inc
index 7369cff..2337b2c 100644
--- a/llvm/lib/Support/Unix/Threading.inc
+++ b/llvm/lib/Support/Unix/Threading.inc
@@ -138,8 +138,9 @@
// 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__)