5 ms·
Help, My Java Object Vanished (and the GC Is Not at Fault)
- ErikCorry 11mo agoNice! Why malloc? Surely this is an on-heap object, not malloc allocated?
- tialaramex 11mo agoI think you've got yourself confused. The heap is what malloc is allocating. So it's like you said "Surely this is somewhere in Europe, not France?" or "Surely this is a round shape, not a circle?"
- comex 11mo agoNot when we’re talking about a JVM, which has its own heap that does not use malloc.
- tialaramex 11mo agoThe JVM is of course just software. In this case it's mostly software written in C++ and that software allocates "its own heap" using uh... malloc https://github.com/openjdk/jdk/blob/master/src/hotspot/share/memory/allocation.cpp https://github.com/openjdk/jdk/blob/master/src/hotspot/share...
- pjmlp 11mo agoIn the specific case of the OpenJDK, there isn't the one JVM, rather a standard[0], like in ISO languages, with a reference implementation to go along it, https://en.wikipedia.org/wiki/List_of_Java_virtual_machines https://en.wikipedia.org/wiki/List_of_Java_virtual_machines And the list doesn't include all, e.g. PTC (https://www.ptc.com/en/products/developer-tools/perc https://www.ptc.com/en/products/developer-tools/perc) [0] - https://docs.oracle.com/javase/specs/index.html https://docs.oracle.com/javase/specs/index.html
- 1718627440 11mo agomalloc is also not a specific implementation, but a standardized interface for allocating on the heap.
- ErikCorry 11mo agoI'm actually pretty surprised if the JVM uses malloc to allocate the heap. V8 uses mmap, never malloc.
- cluckindan 11mo agoCheck your code block CSS, the font sizes are all over the place on mobile (iOS). By ”you” I mean anyone who has a blog and uses code blocks.
- mands 11mo agoGreat read, both in terms of content, but also the approach to diagnosing the issue and debugging in general.