Fix flaky autests for timeout, sigusr2, and thread_config

tests/gold_tests/thread_config/check_threads.py

@@ -36,13 +36,16 @@ def _count_threads_once(ts_path, etnet_threads, accept_threads, task_threads, ai
             # Find the pid corresponding to the ats process we started in autest.
             # It needs to match the process name and the binary path.
             # If autest can expose the pid of the process this is not needed anymore.
+            # Match by CWD or command line containing ts_path, since under
+            # ASAN the CWD may differ from the expected path.
             process_name = p.name()
             process_cwd = p.cwd()
             process_exe = p.exe()
-            if process_cwd != ts_path:
-                continue
-            if process_name != '[TS_MAIN]' and process_name != 'traffic_server' and os.path.basename(
-                    process_exe) != 'traffic_server':
+            is_ts = process_name == '[TS_MAIN]' or process_name == 'traffic_server' or os.path.basename(
+                process_exe) == 'traffic_server'
+            match_by_cwd = process_cwd == ts_path
+            match_by_cmdline = any(ts_path in arg for arg in (p.cmdline() or []))
+            if not is_ts or not (match_by_cwd or match_by_cmdline):
                 continue
         except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
             continue

tests/gold_tests/timeout/ssl-delay-server.cc

@@ -39,6 +39,7 @@
 #include <sys/time.h>
 #include <sys/select.h>
 #include <cerrno>
+#include <csignal>
 
 char req_buf[10000];
 char post_buf[1000];
@@ -156,6 +157,10 @@ main(int argc, char *argv[])
   ttfb_delay           = atoi(argv[3]);
   const char *pem_file = argv[4];
 
+  // Ignore SIGPIPE which can be raised when a client disconnects during
+  // the handshake delay, killing the process unexpectedly.
+  signal(SIGPIPE, SIG_IGN);
+
   fprintf(stderr, "Listen on %d connect delay=%d ttfb delay=%d\n", listen_port, connect_delay, ttfb_delay);
 
   int                listenfd = socket(AF_INET, SOCK_STREAM, 0);
@@ -198,9 +203,11 @@ main(int argc, char *argv[])
 
   for (;;) {
     sfd = accept(listenfd, (struct sockaddr *)nullptr, nullptr);
-    if (sfd <= 0) {
-      // Failure
-      printf("Listen failure\n");
+    if (sfd < 0) {
+      if (errno == EINTR) {
+        continue;
+      }
+      printf("Listen failure errno=%d\n", errno);
       exit(1);
     }