ptrace.diff

diff --git a/src/kudu/util/subprocess.cc b/src/kudu/util/subprocess.cc
index d68cb7f656f78847430887d4dfa0676d8392ee1a..8d3ef7dc752799785effbfd990a9b4700fcfd546 100644
--- a/src/kudu/util/subprocess.cc
+++ b/src/kudu/util/subprocess.cc
@@ -376,6 +376,10 @@ Status Subprocess::Start() {
     // TODO: prctl(PR_SET_PDEATHSIG) is Linux-specific, look into portable ways
     // to prevent orphans when parent is killed.
     prctl(PR_SET_PDEATHSIG, SIGKILL);
+
+    // Allow the child process to be ptraced by any thread.
+    // This is synonymous with `prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY)`.
+    prctl(0x59616d61, ((unsigned long)-1));
 #endif
 
     // stdin