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| author | Anton Lindqvist <anton@basename.se> | 2019-05-21 23:17:22 +0200 |
|---|---|---|
| committer | Anton Lindqvist <anton@basename.se> | 2019-05-24 22:33:56 +0200 |
| commit | 85c573157db1baae51178263fe3289c8329e6dc2 (patch) | |
| tree | 367d8e88c9713fbdff93b4042a3b4fe5c5f5a3de /pkg/csource | |
| parent | 0dadcd9d912d7faab1cd5fc0dfad21ff95ff86a8 (diff) | |
pkg/csource: add ability to annotate syscalls using comments in C reproducers
Providing additional info, especially regarding syscall arguments, in reproducers
can be helpful. An example is device numbers passed to mknod(2).
This commit introduces an optional annotate function on a per target basis.
Example for the OpenBSD target:
$ cat prog.in
mknod(0x0, 0x0, 0x4503)
getpid()
$ syz-prog2c -prog prog.in
int main(void)
{
syscall(SYS_mmap, 0x20000000, 0x1000000, 3, 0x1012, -1, 0, 0);
syscall(SYS_mknod, 0, 0, 0x4503); /* major = 69, minor = 3 */
syscall(SYS_getpid);
return 0;
}
Diffstat (limited to 'pkg/csource')
| -rw-r--r-- | pkg/csource/csource.go | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/pkg/csource/csource.go b/pkg/csource/csource.go index c8513286f..75b5a5e02 100644 --- a/pkg/csource/csource.go +++ b/pkg/csource/csource.go @@ -239,7 +239,12 @@ func (ctx *context) emitCall(w *bytes.Buffer, call prog.ExecCall, ci int, haveCo } fmt.Fprintf(w, "0") } - fmt.Fprintf(w, ");\n") + fmt.Fprintf(w, ");") + comment := ctx.target.AnnotateCall(call) + if len(comment) != 0 { + fmt.Fprintf(w, " /* %s */", comment) + } + fmt.Fprintf(w, "\n") if trace { cast := "" if !native && !strings.HasPrefix(callName, "syz_") { |