From 6dfd2159fed62af9fef4aa52fff2915bb5a21ce0 Mon Sep 17 00:00:00 2001
From: Andrei Pangin <noreply@pangin.pro>
Date: Wed, 3 May 2023 23:56:38 +0100
Subject: [PATCH] Fixed allocation profiling on JDK 20.0.1

---
 src/profiler.cpp | 4 +---
 src/vmEntry.cpp  | 6 +++---
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/profiler.cpp b/src/profiler.cpp
index a9b3351e..5d29c6e0 100644
--- a/src/profiler.cpp
+++ b/src/profiler.cpp
@@ -906,9 +906,7 @@ Engine* Profiler::selectEngine(const char* event_name) {
 }
 
 Engine* Profiler::selectAllocEngine(long alloc_interval, bool live) {
-    if (VM::canSampleObjects() && (alloc_interval > 0 || live ||
-                                   VM::hotspot_version() == 0 ||
-                                   !VMStructs::libjvm()->hasDebugSymbols())) {
+    if (VM::canSampleObjects()) {
         return &object_sampler;
     } else if (VM::isOpenJ9()) {
         return &j9_object_sampler;
diff --git a/src/vmEntry.cpp b/src/vmEntry.cpp
index 5a1caeb1..89fcf64a 100644
--- a/src/vmEntry.cpp
+++ b/src/vmEntry.cpp
@@ -119,11 +119,11 @@ bool VM::init(JavaVM* vm, bool attach) {
     }
 
     if (is_hotspot && _jvmti->GetSystemProperty("java.vm.version", &prop) == 0) {
-        if (strncmp(prop, "25.", 3) == 0) {
+        if (strncmp(prop, "25.", 3) == 0 && prop[3] > '0') {
             _hotspot_version = 8;
-        } else if (strncmp(prop, "24.", 3) == 0) {
+        } else if (strncmp(prop, "24.", 3) == 0 && prop[3] > '0') {
             _hotspot_version = 7;
-        } else if (strncmp(prop, "20.", 3) == 0) {
+        } else if (strncmp(prop, "20.", 3) == 0 && prop[3] > '0') {
             _hotspot_version = 6;
         } else if ((_hotspot_version = atoi(prop)) < 9) {
             _hotspot_version = 9;