Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I always thought that varibales are mapped to stack locations once your Java source is compiled; additionally, they may include the info about the variable names and their scope in classfiles, but that’s optional AFAIK.
The question is – how do my Eclipse/IDEA IDEs allow me to set a watch expression containing the local variable name? To me, it’s hard to understand 🙂
All those IDE base their debug services on top of the JavaTM Platform Debugger Architecture (JPDA).
More precisely, they are all using the Java Virtual Machine Tool Interface (JVM TI), which replaced from JDK5 the experimental JVMPI (Java Virtual Machine Profiling Interface).
That JVMTI includes a Watched Field function and a SetFieldModificationWatch function.
But that doesn’t include local variable: there is actually an RFE opened since quite some time now: bug 4228507.
So in the case of local variable, chances are some kind of BCI is used (Byte Code Instrumentation) (like the TPTP Eclipse module does).