Estimate Cmd Graph Completeness with Strace #95
Description
Using strace during a Linux kernel build provides an upper bound on the number of source files accessed.
The table below compares the number of files tracked by the cmd graph with the results from strace:
| Config | Cmd graph | Strace source files | Filtered strace source files | Remaining unexplained files |
|---|---|---|---|---|
linux.v6.17.tinyconfig.x86.tar.gz |
2214 | 4372 | 2242 | 28 strace_only.txt, 0 sbom_used_files_only.txt |
linux.v6.17.y.gregkh-linux-stable.x86 |
44683 | 48955 | 44911 | 255 strace_only.txt, 27 sbom_used_files_only.txt |
Notes:
- Strace source files: All files in the source tree that were attempted to open during the build.
- Filtered strace source files: Subset of strace files excluding
Makefile*,Kbuild*,Kconfig*,tools/*, andscripts/*. - Remaining unexplained files: Files found by strace but not included in the cmd graph (strace_only.txt) and files found by the cmd graph not included in the strace logs (sbom_used_files_only.txt). These files are likely bugs in the main script that need to be fixed.