The tiered steps provided by Oracle are: It seems to me that... I'd be a reasonable assumption to think that optimizations should occur with methods in isolation (detached from its call-site context),...

enum TosState { // Describes the TOS (Top of Stack) cache contents btos = 0, // byte, bool TOS cached ztos = 1, // byte, bool TOS cached ctos = 2, // ...

I'm not compiling anything to native, in other words, I'm not using native-image from GraalVM. I'm just running the same Java class (same Java bytecode) with GraalVM and then running the same Java ...

In java, a reference variable contains object reference which is some kind of wrapper over raw addr or pointer or some sort of mapping and during dereferencing this mapping is used to navigate to the ...

I am trying to use the Google Closure Compiler from Java code, but want it to be an optional dependency (present at build time, but may not be around when deployed). The problem I'm having is that I'm ...

In java.lang.invoke.VarHandle.java, there is a method compareAndSet which is defined like that: public final native @MethodHandle.PolymorphicSignature @IntrinsicCandidate boolean compareAndSet(Object.....

we are able to launch a dump collection tool for jni crashes using jvm option -XX:OnError. But like we get a jit address passed to the jit debugger in win32 app crashes we dont get it from jvm. Is ...

I want to create CDS archive for my application running in Kubernetes using the classlist creation approach. But I want to save a pod restart that is required for creating classlist. Is there some ...

I am a Java developer, using jdk 1.8. My application runs in k8s. The memory limit of each pod is 2.5g. When my application runs for a period of time, a full gc occurs, but the memory will not be ...

I observe some performance problems on switching from 32GB to 64GB memory for my appliction. I have following configured: java.arg.2=-Xms14g java.arg.3=-Xmx54g From here Compressed oops is supported ...

I created a null dereference in C++ code that is called from java exe. AeDebug registry key is set with notepad (for testing.) However, the app crash does not launch notepad. Attached windbg and found ...

I am doing runtime instrumentation using the interpreter. My focus now is adding a function call before any ReEntractLock lock() and unlock() function. For reference, this is the Test.java: class Test ...

When logging compilation on hotspot when running under -XX:+LogCompilation -XX:LogFile=/path/to/file.log logs get written to /path/to/file.log which is good, but also different (much more) logs are ...

After my research on the source code implementation details of System.gc in Java17 ，i found that System.gcwill eventually trigger two gc types: full gc (stop the world), when we use SerialGC, ...

I am trying to log every access to a field/static variable for an analysis tool I'm building, so far I have found this interpreter rt function, void InterpreterRuntime::resolve_get_put(JavaThread* ...