Nick’s answer is a good starting point, but incomplete, as you actually need to overload: private: void* operator new(size_t); // standard new void* operator new(size_t, void*); // placement new void* operator new[](size_t); // array new void* operator new[](size_t, void*); // placement array new (Good coding practice would suggest you should also overload the delete and … Read more
By default, <javac> runs in-process with Ant. It is a general limitation of Java that you can’t adjust a JVM process’ Xms and Xmx once that JVM process has launched. So, the error message that you are seeing is the software rejecting your attempt to violate this principle (using an unhelpful, unfriendly error message.) If, … Read more
There is a mechanism to do it without modifying any files that are in the distribution. You can create a separate file %CATALINA_HOME%\bin\setenv.bat or $CATALINA_HOME/bin/setenv.sh and put your environment variables there. Further, the memory settings apply to the JVM, not Tomcat, so I’d set the JAVA_OPTS variable instead: set JAVA_OPTS=-Xmx512m
I’m not entirely sure what you’re asking, but I’ll try my best to answer. The following declares a variable i on the stack: int i; When I ask for an address using &i I get the actual location on the stack. When I allocate something dynamically using malloc, there are actually TWO pieces of data … Read more
-Xmx specifies the precise upper limit for the heap. It is the preferred way to set the heap size. -XX:MaxRAM does not define the heap size directly. Instead this parameter overrides the actual amount of physical RAM when calculating the heap limits basing on ergonomics. If -Xmx is set, MaxRAM is never used. Otherwise the … Read more
The 32-bit/64-bit part is unrelated to Java It turns out that memory locations in a 32-bit system are referenced by 32-bit unsigned integers. This allows up to 2^32 possible memory locations. Since each location stores 1 byte you get 2^32 bytes or 4 GB if you prefer. On a 64 bit system there are 2^64 … Read more
No guarantee whatsoever. [string.cons]/36 defines assigning a const char* to an std::string in term of a move-assignment, whose definition is: [string.cons]/32 basic_string& operator=(basic_string&& str) noexcept(/*…*/) Effects: Move assigns as a sequence container, except that iterators, pointers and references may be invalidated. This shows that the Committee let the implementation choose freely between an invalidating operation … Read more
as I understand, int is value type and therefore lives in the stack Your understanding is incorrect. Value types are called “value types” because they are copied by value. Reference types are called “reference types” because they are copied by reference. It is not at all true that “value types always live on the stack”. … Read more
@fd – the RedHat bug had your answer. The mallinfo function has been deprecated, and won’t be updated. A true query stats API is TDB. Today, you have malloc_stats and malloc_info. I can’t find any documentation on either one, but here’s what they give you. Is this close enough to what you need? (gdb) call … Read more
Small intro, Node.js is written in C++ and JS engine V8 is written in the C++ too, so when people say native something in Node.js they usually mean C++ stuff that can be called from the JS code or not and etc. In that particular case native_context is just the object that stores some fields … Read more