[compiler-rt] [scudo] Add hooks to mark the range of realloc (PR #74353)

[Fabio D'Urso via llvm-commits]

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@@ -27,15 +27,21 @@ static void reportDeallocation(void *ptr) {
     if (__scudo_deallocate_hook)
       __scudo_deallocate_hook(ptr);
 }
-static void reportReallocBegin(void *old_ptr) {
-  if (SCUDO_ENABLE_HOOKS)
-    if (__scudo_realloc_begin_hook)
-      __scudo_realloc_begin_hook(old_ptr);
+static void reportReallocAllocation(void *old_ptr, void *new_ptr, size_t size) {
+  if (SCUDO_ENABLE_HOOKS) {
+    if (__scudo_realloc_allocate_hook)
+      __scudo_realloc_allocate_hook(old_ptr, new_ptr, size);
+    else
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fabio-d wrote:

I think we want this to be `else if (__scudo_allocate_hook && new_ptr)`

https://github.com/llvm/llvm-project/pull/74353