From 094fe05bdd68332fa617df8a98858e324afa15ec Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@unpythonic.net>
Date: Wed, 25 Mar 2020 13:40:48 -0500
Subject: [PATCH] allow retrieving info about a supervisor allocation

---
 supervisor/memory.h        | 1 +
 supervisor/shared/memory.c | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/supervisor/memory.h b/supervisor/memory.h
index f557744ae5..f4359ca46e 100755
--- a/supervisor/memory.h
+++ b/supervisor/memory.h
@@ -43,6 +43,7 @@ typedef struct {
 
 void memory_init(void);
 void free_memory(supervisor_allocation* allocation);
+supervisor_allocation* allocation_from_ptr(void *ptr);
 supervisor_allocation* allocate_remaining_memory(void);
 
 // Allocate a piece of a given length in bytes. If high_address is true then it should be allocated
diff --git a/supervisor/shared/memory.c b/supervisor/shared/memory.c
index 14c3b4979b..51037bd6d8 100755
--- a/supervisor/shared/memory.c
+++ b/supervisor/shared/memory.c
@@ -82,6 +82,15 @@ void free_memory(supervisor_allocation* allocation) {
     allocation->ptr = NULL;
 }
 
+supervisor_allocation* allocation_from_ptr(void *ptr) {
+    for (size_t index = 0; index < CIRCUITPY_SUPERVISOR_ALLOC_COUNT; index++) {
+        if (allocations[index].ptr == ptr) {
+            return &allocations[index];
+        }
+    }
+    return NULL;
+}
+
 supervisor_allocation* allocate_remaining_memory(void) {
     if (low_address == high_address) {
         return NULL;