I always compile my programs with gcc and during development always with: gcc -g -Wall -Wextra -std=c2x -fsanitize=address,undefined Today I noticed that the address sanitizer randomly detects SEG...

The Problem Recently on Linux Kernels 6.6.6 and higher it was discovered that thread sanitizer will always lead to this error: FATAL: ThreadSanitizer: unexpected memory mapping 0x5c9bd4d2b000-0x5c9...

I'm developing a static freestanding nolibc/nostdlib program for Linux and would like to use the C compiler's memory, address and undefined behavior sanitizers to improve my code. I couldn't get it...

I'm using clang++ 10 on Ubuntu 20.04 LTS, with -fsanitize-undefined-trap-on-error -fsanitize=address,undefined,nullability,implicit-integer-truncation,implicit-integer-arithmetic-value-change,impli...

Clang has various sanitizers that can be turned on to catch problems at runtime. However, there are some sanitizers that I can't use together. Why is that? clang++-3.9 -std=c++1z -g -fsanitize=me...

In our codebase we expect that strings only exist once in the compiled binary. I observe that -fsanitize=address can generate duplicated strings in the executable. This breaks our code. The follo...

I want to use this kind of sanitizer in gcc. How can I do this? Is such an operation possible? I found solution for clang: clang -fsanitize=memory -fno-omit-frame-pointer -g -O2 umr.cc but I don't ...

I'm trying to use Google's Address Sanitizer with a CUDA project, more precisely with OpenCV cuda functions. However I got an 'out of memory' error on the first cuda call. OpenCV Error: Gpu API ca...

I would like to suppress one error in a third-party library, but still have the program exit 1 on any other failed check. It seems to me that -fno-sanitize-recover will exit the program regardless ...

So I'm using the AddressSanitizer. But it uses some dense terms when describing the problem. Shadow bytes around the buggy address: 0x0c067fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00...

I would like to run my unit test suite with -fsanitize=address,undefined and have all sanitizer errors be written to a report.txt file. By default all sanitizer errors get written to stdout, howeve...

I used DomSanitizer to sanitize my HTML content from database to be displayed on page. <div [innerHtml]="safeHtml(article.text)"></div> Where safeHtml is: safeHtml(html){ return th...

Recent versions of GCC and Clang feature Undefined Behavior Sanitizer (UBSan) which is a compile flag (-fsanitize=undefined) that adds runtime instrumentation code. On errors, a warning such as thi...

After compiling an application with clang 3.6 using -fsanitize=undefined, I'm trying to start the instrumented program while using a suppression file to ignore some of the errors: UBSAN_OPTIONS="s...

Why does -fsanitize=undefined throw runtime error: left shift of 1 by 31 places cannot be represented in type 'int' on this code uint32_t z; z = 1 << 31; ?

I'm trying to get address sanitizer blacklist working in a C++ project but its not working as expected. I tried the example on their website, if I compile with clang, it works fine. build % cat su...

I am trying to suppress a warning from the address sanitizer in clang/gcc My source file looks like this: int foo(){ double bar[] = {7,8}; return bar[3]; } int main(){ return foo(); } and o...

Clang has a number of sanitizers that enable runtime checks for questionable behavior. Unfortunately, they can't all be enabled at once. It is not possible to combine more than one of the -fsani...

In clang, I run into linking error if the Undefined Behavior Sanitizer (-fsanitize=undefined) when the program uses 128 bit integer. The linking errors complain about __muloti4: $ cat example.c __...

When using sanitizers with gcc one can provide a list of exceptions/suppressions to deal with false positives and such. the suppression file format is poorly documented. Each suppression is of th...

I have several versions of a project checkout out and compiled. If I spot an error, I compare the versions to narrow the problem down. Sometimes I enable sanitizers like the AddressSanitizer. If I ...

This is dangling pointer|reference example: #include <string> #include <string_view> #include <iostream> std::string foo() { return "test"; } int main() { std::string_view ba...

I have built an instrumented libc++ as described here. I have set the flags as the above site suggests: MSAN_CFLAGS="-fsanitize=memory -stdlib=libc++ -L/path_to/llvm-build-msan/lib -lc++abi -I/pat...

The following apparently valid code produces a misaligned address runtime error using the UndefinedBehaviorSanitizer sanitiser. #include <memory> #include <functional> struct A{ std:...

I compiled my code like this to enable Asan: g++ -O0 -g -fsanitize=address -fno-omit-frame-pointer but it never generates a core dump so that I can later examine the details of the error. How ca...