Improved build coverage of DEV_DEBUG_ABI_CPP option and operator delete monitoring.

Made example more instructive on build option error.

Author: mhightower83

cores/esp8266/heap.cpp

@@ -918,7 +918,7 @@ void* _heap_abi_malloc(size_t size, bool unhandled, const void* const caller)
 }; // extern "C" {
 
 
-#if defined(ENABLE_THICK_DEBUG_WRAPPERS)
+#if defined(ENABLE_THICK_DEBUG_WRAPPERS) || defined(USE_HEAP_ABI_MEMALIGN) || defined(USE_HEAP_ABI_MALLOC)
 ///////////////////////////////////////////////////////////////////////////////
 // Replacement C++ delete operator to capture callers address
 //

libraries/esp8266/examples/HeapNewDeleteTest/HeapNewDeleteTest.ino

@@ -326,6 +326,11 @@ void _NOINLINE test_new_try_catch(int& err_count, size_t sz, size_t alignment, i
 void print_build_options() {
 #if DEV_DEBUG_ABI_CPP
   PRINTF_LN("  Built with DEV_DEBUG_ABI_CPP");
+#if defined(__cpp_exceptions) && !(defined(DEBUG_ESP_OOM) || defined(DEBUG_ESP_PORT) || defined(DEBUG_ESP_WITHINISR) || defined(MIN_ESP_OOM))
+  PRINTF_LN("*   This build used the LIBC's default operator \"new\"(/\"delete\") handler for C++ Exceptions, which bypassed");
+  PRINTF_LN("*   our monitoring logic. The goal is to confirm the coverage of our added Heap debugging logic.");
+  PRINTF_LN("*   To use the \"new\"/\"delete\" monitoring logic, define a debug option like MIN_ESP_OOM, DEBUG_ESP_PORT, etc.");
+#endif
 #else
   PRINTF_LN("* For complete operation, the test build requires option -DDEV_DEBUG_ABI_CPP=1");
 #endif
@@ -402,8 +407,6 @@ void setup() {
 
   print_build_options();
 #if UMM_ENABLE_MEMALIGN
-  PRINTF_LN("  Built with UMM_ENABLE_MEMALIGN, i.e. memalign present");
-
   void* new_ptr = aligned_alloc(128, 32);
   if (new_ptr) {
     PRINTF_LN("  %p, function \"aligned_alloc()\" worked", new_ptr);

libraries/esp8266/examples/HeapNewDeleteTest/HeapNewDeleteTest.ino.globals.h

@@ -18,7 +18,7 @@
 // These build options are required for this test program.
 -DUMM_ENABLE_MEMALIGN=1
 -DDEV_DEBUG_ABI_CPP=1
-// -DMIN_ESP_OOM=1
+-DMIN_ESP_OOM=1
 // Use Arduino IDE "Tools->C++ Exceptions" to enable disable C++ exceptions.