How do I enable ASan in Clang or GCC?

You can enable it by adding the -fsanitize=address flag to both your compilation and linking commands, usually combined with -g for better stack traces.

Can I use AddressSanitizer in production environments?

No, ASan is strictly intended for testing and debugging. It introduces significant performance overhead and can lower the security profile of production binaries.

Why is my fuzzer killing the ASan-instrumented process?

ASan reserves a large amount of virtual memory (~20TB). You must disable memory limits in your fuzzer (e.g., -rss_limit_mb=0 for libFuzzer or -m none for AFL++) to prevent it from being terminated.

What memory errors does AddressSanitizer detect?

ASan detects various memory safety issues including heap and stack buffer overflows, use-after-free, double-free, and memory leaks.

Does AddressSanitizer work with Rust?

Yes, it is particularly useful for testing Rust code that uses unsafe blocks or interacts with C libraries via Foreign Function Interface (FFI) using cargo-fuzz.

AddressSanitizer (ASan)

Name: AddressSanitizer (ASan)
Author: trailofbits

bytrailofbits

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939

安全与测试

Detects memory errors like buffer overflows and use-after-free bugs during C/C++ fuzzing and security audits.

关于

AddressSanitizer (ASan) is a specialized memory error detection tool that instruments C, C++, and Rust code at compile time to identify critical vulnerabilities such as memory leaks, use-after-free, and buffer overflows. By utilizing shadow memory to track allocation states, it provides developers and security researchers with detailed crash reports and stack traces, making it an essential component for vulnerability discovery and software hardening during the testing and fuzzing phases.

主要功能

Provides detailed stack traces and memory maps for precise debugging
Detects buffer overflows, stack-use-after-return, and use-after-free errors
Integrates seamlessly with major fuzzers like libFuzzer and AFL++
939 GitHub stars
Instruments code during compilation for efficient runtime monitoring
Supports custom configuration via environment variables like ASAN_OPTIONS

使用场景

Verifying memory safety in Rust projects containing unsafe blocks or FFI
Debugging mysterious crashes and memory leaks in development environments
Finding memory corruption bugs in C/C++ codebases during fuzzing campaigns

关于

主要功能

Provides detailed stack traces and memory maps for precise debugging
Detects buffer overflows, stack-use-after-return, and use-after-free errors
Integrates seamlessly with major fuzzers like libFuzzer and AFL++
939 GitHub stars
Instruments code during compilation for efficient runtime monitoring
Supports custom configuration via environment variables like ASAN_OPTIONS

使用场景

Verifying memory safety in Rust projects containing unsafe blocks or FFI
Debugging mysterious crashes and memory leaks in development environments
Finding memory corruption bugs in C/C++ codebases during fuzzing campaigns