What do the suppressed leaks mean in Valgrind?
Those are leaks outside of your code, in (probably shared) libraries or known false positives. Running valgrind with -v should inform you about the suppressions used.
valgrind
How does valgrind work?
Valgrind basically runs your application in a “sandbox.” While running in this sandbox, it is able to insert its own instructions to do advanced debugging and profiling. From the manual: Your program is then run on a synthetic CPU provided by the Valgrind core. As new code is executed for the first time, the core … Read more
valgrind, gcc 6.2.0 and “-fsanitize=address”
You won’t be able to run sanitized code under Valgrind. Even if you get past the problem with preloading libasan, you’ll run into conflicting address space requirements (i.e. upon start Valgrind reserves region of memory which is also required by Asan shadow memory) and this can’t be worked around as both addresses are hard-coded in … Read more
Android valgrind build fails
For building and installing Valgrind for Android use the bash script below, which I prefer to call build_valgrind.sh To run with RUN_HELLO_JNI_THROUGH_VALGRIND=true you need two additional scripts (bootstrap_valgrind.sh, start_valgrind.sh) in the directory you run the script below from. Running the script with the RUN_HELLO_JNI_THROUGH_VALGRIND=true flag will build the hello-jni application from the samples directory inside … Read more
Why does Valgrind not detect a memory leak in a Rust program using nightly 1.29.0?
Rust 1.32 As of Rust 1.32, the default allocator for an executable is now the system allocator, so you don’t need to set anything by default. Previous versions You aren’t using the global allocator setting correctly. This is a nightly feature, which means that it’s prone to change at any time. Your blog post is … Read more
How to start an android app with valgrind
You can try to clear the logcat first prompt# adb logcat -c prompt# adb logcat You should be able to see the logs coming in once you triggered your application. am start -a android.intent.action.MAIN -n com.example.hellojni/.HelloJni I had problems with my shell script and i used this instead. adb shell setprop wrap.com.example.hellojni “logwrapper /data/local/Inst/bin/valgrind” You … Read more
How do you tell Valgrind to completely suppress a particular .so file?
For most of the suppression types, you omit the wildcard, like so: { name Memcheck:Cond obj:/path/to/lib/lib.so.10.1 } { name Memcheck:Free obj:/path/to/lib/lib.so.10.1 } { name Memcheck:Value8 obj:/path/to/lib/lib.so.10.1 } Note that you must list each type of error separately, you can’t wildcard them. You must also list the entire pathname of the library (as shown by valgrind, … Read more
Valgrind not showing line numbers in spite of -g flag (on Ubuntu 11.10/VirtualBox)
The output you provided in your question contains the following line: ==5190== Use –track-origins=yes to see where uninitialised values come from Per this message you should run ./ex4 like this: valgrind –track-origins=yes ./ex4 To avoid some problems with Valgrind unable to find debug information, you can use static linking: gcc -static -g -o ex4 ex4.c … Read more
Does boost::bind() copy parameters by reference or by value?
By value. 1 But you can make it copy by ref instead: void SomeFunction(const int& value) { boost::bind(…, boost::ref(value)); boost::bind(…, boost::cref(value)); // by const ref } 1 http://www.boost.org/doc/libs/1_46_1/libs/bind/bind.html#Purpose a copy of the value of i is stored into the function object. boost::ref and boost::cref can be used to make the function object store a reference … Read more
Memory Leaks in GTK hello_world program
This answer is compiled from answers to the same question (on the now defunct www.gtkforums.com). GTK+ is pretty lazy when it comes to allocating and deallocating internal buffers needed for the life time of the application. For example it may allocate an area of memory for a lookup table during initialisation which is needed for … Read more