Merge branch 'main' into prof-15098-context-by-id

Author: jbachorik

build-logic/conventions/src/main/kotlin/com/datadoghq/native/config/ConfigurationPresets.kt

@@ -217,16 +217,17 @@ object ConfigurationPresets {
                     }
                     // G1GC's heap reservation is placed just below 2 GB (0x7fff7000) by ASLR on
                     // some kernel configurations, which is exactly where ASan needs to mmap its
-                    // shadow bytes [0x7fff7000-0x10007fff7fff].  This is not JDK-version specific
-                    // — it depends on the kernel's mmap base randomisation at the time the process
-                    // starts.  Force the heap to a very low base address so the entire JVM
-                    // footprint (heap + class space + code cache) stays well below the shadow
-                    // range and the two regions never conflict.
-                    config.testJvmArgs.addAll(listOf(
-                        "-XX:HeapBaseMinAddress=0x4000000",
-                        "-Xmx512m",
-                        "-XX:CompressedClassSpaceSize=256m"
-                    ))
+                    // shadow bytes [0x7fff7000-0x10007fff7fff].  Force the heap to a very low
+                    // base address so the entire JVM footprint stays below the shadow range.
+                    // HeapBaseMinAddress is not accepted by JDK <= 11 (constraint violation);
+                    // those JDKs rely on the vm.mmap_rnd_bits=8 CI-level mitigation instead.
+                    if (PlatformUtils.testJvmMajorVersion() >= 12) {
+                        config.testJvmArgs.addAll(listOf(
+                            "-XX:HeapBaseMinAddress=0x4000000",
+                            "-Xmx512m",
+                            "-XX:CompressedClassSpaceSize=256m"
+                        ))
+                    }
                 }
             }
             Platform.MACOS -> {

build-logic/conventions/src/main/kotlin/com/datadoghq/native/util/PlatformUtils.kt

@@ -350,6 +350,25 @@ object PlatformUtils {
         )
     }
 
+    /**
+     * Returns the major version of the test JVM (e.g. 8, 11, 17, 21, 25).
+     * Returns 0 if the version cannot be determined.
+     */
+    fun testJvmMajorVersion(): Int {
+        val javaHome = testJavaHome()
+        return try {
+            val process = ProcessBuilder("$javaHome/bin/java", "-version")
+                .redirectErrorStream(true)
+                .start()
+            val output = process.inputStream.bufferedReader().readText()
+            process.waitFor(10, TimeUnit.SECONDS)
+            val match = Regex("""version "(?:1\.)?(\d+)""").find(output)
+            match?.groupValues?.get(1)?.toIntOrNull() ?: 0
+        } catch (_: Exception) {
+            0
+        }
+    }
+
     /**
      * Returns true if the test JVM (from JAVA_TEST_HOME or JAVA_HOME) is an OpenJ9/J9 JVM.
      * Probes `java -version` stderr output for "J9" or "OpenJ9".