From 8b829b45e58a5e9fc2fb88331697bbc8aa96bc50 Mon Sep 17 00:00:00 2001
From: Will Smith <lol.tihan@gmail.com>
Date: Tue, 16 Aug 2022 17:02:57 -0700
Subject: [PATCH] Fixed SuperPMI collection by instantiate 'GetExactClasses' if
 it is null

---
 src/coreclr/tools/superpmi/superpmi-shared/methodcontext.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/coreclr/tools/superpmi/superpmi-shared/methodcontext.cpp b/src/coreclr/tools/superpmi/superpmi-shared/methodcontext.cpp
index e8a883ed2d606f..14a1922cca3349 100644
--- a/src/coreclr/tools/superpmi/superpmi-shared/methodcontext.cpp
+++ b/src/coreclr/tools/superpmi/superpmi-shared/methodcontext.cpp
@@ -2705,6 +2705,9 @@ CorInfoTypeWithMod MethodContext::repGetArgType(CORINFO_SIG_INFO*       sig,
 
 void MethodContext::recGetExactClasses(CORINFO_CLASS_HANDLE baseType, int maxExactClasses, CORINFO_CLASS_HANDLE* exactClsRet, int result)
 {
+    if (GetExactClasses == nullptr)
+        GetExactClasses = new LightWeightMap<DLD, DLD>();
+
     DLD key;
     ZeroMemory(&key, sizeof(key));
     key.A = CastHandle(baseType);