--- libmalloc/libmalloc-166.251.2/private/malloc_private.h
+++ libmalloc/libmalloc-317.40.8/private/malloc_private.h
@@ -76,4 +76,40 @@
 API_AVAILABLE(macos(10.14), ios(12.0), tvos(12.0), watchos(5.0))
 int malloc_engaged_nano(void) __result_use_check;
 
+
+/********* PGuard ************/
+
+const static uint32_t k_pguard_trace_max_frames = 16;
+
+typedef struct {
+	uint64_t thread_id;
+	uint32_t num_frames;
+	vm_address_t frames[k_pguard_trace_max_frames];
+} stack_trace_t;
+
+typedef struct {
+	// diagnose_page_fault
+	const char *error_type;
+	const char *confidence;
+	vm_address_t fault_address;
+	// fill_in_report
+	vm_address_t nearest_allocation;
+	size_t allocation_size;
+	const char *allocation_state;
+	uint32_t num_traces;
+	stack_trace_t alloc_trace;
+	stack_trace_t dealloc_trace;
+} pguard_report_t;
+typedef pguard_report_t pgm_report_t;
+
+/**
+ * Like memory_reader_t, but caller must free returned memory if not NULL.
+ */
+typedef void *(*crash_reporter_memory_reader_t)(task_t task, vm_address_t address, size_t size);
+
+API_AVAILABLE(macos(10.16), ios(14.0), tvos(14.0), watchos(7.0))
+kern_return_t pgm_diagnose_fault_from_crash_reporter(vm_address_t fault_address, pgm_report_t *report,
+		task_t task, vm_address_t zone_address, crash_reporter_memory_reader_t crm_reader) __result_use_check;
+
+
 #endif /* _MALLOC_PRIVATE_H_ */