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| author | Dmitry Vyukov <dvyukov@google.com> | 2022-01-04 15:29:10 +0100 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2022-01-11 16:30:08 +0100 |
| commit | bad18a53de8fa8d3d097e3d701efb72a014661cb (patch) | |
| tree | 2ff6cc1aa917897c643d2e4bc5e6ce2098d55a6d /docs/syscall_descriptions_syntax.md | |
| parent | a19c1bce2eee5a1893b4ae9c8292b0f1b2630225 (diff) | |
pkg/compiler: require stricter resource constructors
Don't consider syscalls that return resources in unions/arrays as constructors.
Unions and arrays are problematic because we don't have directed generation
in prog.randGen.createResource() and can fail to generate a syscall that
returns a particular resource (generate a wrong union option that does not
contain the necessary resource). This leads to the following panics:
panic: failed to create a resource ifindex with ioctl$sock_SIOCGIFCONF
Require each resource to have a constructor syscall that returns the resource
outside of unions/arrays.
Diffstat (limited to 'docs/syscall_descriptions_syntax.md')
| -rw-r--r-- | docs/syscall_descriptions_syntax.md | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/syscall_descriptions_syntax.md b/docs/syscall_descriptions_syntax.md index dd5dbeb3d..a8f79b580 100644 --- a/docs/syscall_descriptions_syntax.md +++ b/docs/syscall_descriptions_syntax.md @@ -228,6 +228,10 @@ test_struct { } ``` +Each resource type must be "produced" (used as an output) by at least one syscall +(outside of unions and optional pointers) and "consumed" (used as an input) +by at least one syscall. + ## Type Aliases Complex types that are often repeated can be given short type aliases using the |