Worked on enhancing system call tracing robustness in the DynamoRIO/dynamorio repository, focusing on ensuring correctness when syscall instructions are interleaved with other instrumentation markers. Addressed a bug where syscall instructions could be erroneously omitted by updating the should_omit_syscall() logic to properly skip non-syscall markers. Developed and integrated regression tests to validate the fix, improving reliability and reducing false negatives in syscall capture for mixed-marker workloads. Utilized C++ for both the core system programming changes and the accompanying test suite, demonstrating attention to detail in testing and correctness for complex tracing scenarios. No new features were added during this period.