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Feb 23, 2011 · gdb can be useful to take heap dumps fast. Normally one would dump the heap by using jmap or similar tools. But when using this tools, the JVM performs garbage collection before dumping, which can take hours on a hanging process. With the steps below you can dump fast, restart the process and convert the dump afterwards. gdb --pid <PID>.
The solution was to use gdb-python (on MSYS; on Linux typically gdb comes with Python built-in already?), hook backtrace, use . python stack_trace = gdb.execute('backtrace', False, True') Then process stack_trace with Python's regexes, and print them out. Bold and other colours are achieved by a function like this:
10. You can also run your program first, then attach GDB to it: gdb --pid $(pgrep your_program) This way you will be able to run your program interactively in a separate terminal. Note: attaching GDB to another process might require using sudo or changing permissions. edited Mar 24 at 12:13. answered Dec 1, 2018 at 12:37.
May 2, 2019 · I'm not aware of any online-compiler which lets you create a window. Fiddling with X11 won't help you. These web services are probably headless. And even if they had X installed you wouldn't be able to see the window in your browser. The online compiler had to explicitly implement something to send and show X windows in your browser. –
Dec 23, 2014 · gdb cannot debug Java directly. gdb cannot be used to debug Java programs in general, it can only be used to debug Java programs that were compiled into binaries using gcj. See also Java Debugging with gdb from its manual. You may want to go for jdb instead, which is the Java Debugger that comes with a JDK. Emacs for Java? Use an IDE instead
Jan 31, 2011 · 1. p *array-variable@length should work. Works fine for me, this is straight out of the doco "p *array-variable@length Print first # values of array specified by length. Good for pointers to dynamicaly allocated memory." You may need to set print array on before this works.
Oct 14, 2019 · They are meant to run small snippet & not to run the whole project. Below is the snippet you can run on onlinegdp without creating the different file. public static void main (String[]args) Worker bob = new Worker (); System.out.println (bob.getHours ()); static public class Worker. private int hours;
Aug 22, 2011 · Using Runtime.getRuntime.exec, I'm able to attach GDB to any processes. The problem is that I am unable to send inputs to GDB after it has been started. **EDIT (19/8/2011): At the line "out.println(gdbcommand)", gdb is started. How do I get the stdout of the newly spawned gdb, write inputs to it and then read the stdin.
First, you can place your GDB commands (such as 'run') in a text file and provide the filename to the -x argument. Second, you can have GDB exit after running your commands by providing the --batch argument. A full example: gdb -x commands.txt --batch --args executablename arg1 arg2 arg3. edited Mar 19, 2022 at 20:15.
Feb 13, 2012 · 3. I found the following way really interesting. By linking the file below to the jni library you want to debug, when the library get loaded by the dynamic linker it automatically starts a gdbserver for the current jvm, thanks to the gcc constructor attribute. Simply using remote gdb from command line or from eclipse make it easy to debug then.
