Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/lsan/TestCases/Linux/fork.cc

@@ -0,0 +1,24 @@
+// Test that thread local data is handled correctly after forking without exec().
+// RUN: %clangxx_lsan %s -o %t
+// RUN: %run %t 2>&1
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+__thread void *thread_local_var;
+
+int main() {
+  int status = 0;
+  thread_local_var = malloc(1337);
+  pid_t pid = fork();
+  assert(pid >= 0);
+  if (pid > 0) {
+    waitpid(pid, &status, 0);
+    assert(WIFEXITED(status));
+    return WEXITSTATUS(status);
+  }
+  return 0;
+}