add STACK_TRAP to track stack use on client, will seqfault if exceed limit to see where use is too high, doesn't work with pthread_create()

ctaocrypt/src/asn.c

@@ -137,6 +137,13 @@
     #define XGMTIME(c) gmtime((c))
     #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
 
+    #ifdef STACK_TRAP
+        /* for stack trap tracking, don't call os gmtime on OS X/linux,
+           uses a lot of stack spce */
+        extern time_t time(time_t * timer);
+        #define XTIME(tl)  time((tl))
+    #endif /* STACK_TRAP */
+
 #else
     /* default */
     /* uses complete <time.h> facility */

cyassl/test.h

@@ -1239,6 +1239,42 @@ static INLINE void StackSizeCheck(func_args* args, thread_func tf)
 
 #endif /* HAVE_STACK_SIZE */
 
+
+#ifdef STACK_TRAP
+
+/* good settings
+   --enable-debug --disable-shared C_EXTRA_FLAGS="-DUSER_TIME -DTFM_TIMING_RESISTANT -DPOSITIVE_EXP_ONLY -DSTACK_TRAP"
+
+*/
+
+#ifdef HAVE_STACK_SIZE
+    /* client only for now, setrlimit will fail if pthread_create() called */
+    /* STACK_SIZE does pthread_create() on client */
+    #error "can't use STACK_TRAP with STACK_SIZE, setrlimit will fail"
+#endif /* HAVE_STACK_SIZE */
+
+static INLINE void StackTrap(void)
+{
+    struct rlimit  rl;
+    if (getrlimit(RLIMIT_STACK, &rl) != 0)
+        err_sys("getrlimit failed");
+    printf("rlim_cur = %llu\n", rl.rlim_cur);
+    rl.rlim_cur = 1024*21;  /* adjust trap size here */
+    if (setrlimit(RLIMIT_STACK, &rl) != 0) {
+        perror("setrlimit");
+        err_sys("setrlimit failed");
+    }
+}
+
+#else /* STACK_TRAP */
+
+static INLINE void StackTrap(void)
+{
+}
+
+#endif /* STACK_TRAP */
+
+
 #if defined(__hpux__) || defined(__MINGW32__)
 
 /* HP/UX doesn't have strsep, needed by test/suites.c */

examples/client/client.c

@@ -201,6 +201,8 @@ THREAD_RETURN CYASSL_THREAD client_test(void* args)
     (void)sslResume;
     (void)trackMemory;
 
+    StackTrap();
+
     while ((ch = mygetopt(argc, argv, "?gdusmNrtfxh:p:v:l:A:c:k:b:zS:")) != -1){
         switch (ch) {
             case '?' :
@@ -693,7 +695,7 @@ THREAD_RETURN CYASSL_THREAD client_test(void* args)
         args.argv = argv;
 
         CyaSSL_Init();
-#if defined(DEBUG_CYASSL) && !defined(CYASSL_MDK_SHELL)
+#if defined(DEBUG_CYASSL) && !defined(CYASSL_MDK_SHELL) && !defined(STACK_TRAP)
         CyaSSL_Debugging_ON();
 #endif
         if (CurrentDir("client") || CurrentDir("build"))