automation/eclair: add deviations for Rule 20.7

These deviations deal with the following cases:
- macro arguments used directly as initializer list arguments;
- uses of the __config_enabled macro, that can't be brought
  into compliance without breaking its functionality;
- exclude files that are out of scope (efi headers and cpu_idle);
- uses of alternative_{call,vcall}[0-9] macros.

The existing configuration for R20.7 is reordered so that it matches the
cases listed in its documentation comment.

Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Nicola Vetrini authored and Stefano Stabellini committed 2024-04-05 11:15:47 -07:00
1 parent 6bdb67d19e
commit 80d28865e1
3 files changed
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@@ -401,12 +401,33 @@ unexpected result when the structure is given as argument to a sizeof() operator
-doc_begin="Code violating Rule 20.7 is safe when macro parameters are used: (1)
as function arguments; (2) as macro arguments; (3) as array indices; (4) as lhs
in assignments."
in assignments; (5) as initializers, possibly designated, in initalizer lists."
-config=MC3R1.R20.7,expansion_context=
{safe, "context(__call_expr_arg_contexts)"},
{safe, "left_right(^[(,\\[]$,^[),\\]]$)"},
{safe, "context(skip_to(__expr_non_syntactic_contexts, stmt_child(node(array_subscript_expr), subscript)))"},
{safe, "context(skip_to(__expr_non_syntactic_contexts, stmt_child(operator(assign), lhs)))"},
{safe, "left_right(^[(,\\[]$,^[),\\]]$)"}
{safe, "context(skip_to(__expr_non_syntactic_contexts, stmt_child(node(init_list_expr||designated_init_expr), init)))"}
-doc_end
-doc_begin="Violations involving the __config_enabled macros cannot be fixed without
breaking the macro's logic; futhermore, the macro is only ever used in the context
of the IS_ENABLED or STATIC_IF/STATIC_IF_NOT macros, so it always receives a literal
0 or 1 as input, posing no risk to safety."
-config=MC3R1.R20.7,reports+={safe, "any_area(any_loc(any_exp(macro(^___config_enabled$))))"}
-doc_end
-doc_begin="Violations due to the use of macros defined in files that are
not in scope for compliance are allowed, as that is imported code."
-file_tag+={gnu_efi_include, "^xen/include/efi/.*$"}
-file_tag+={acpi_cpu_idle, "^xen/arch/x86/acpi/cpu_idle\\.c$"}
-config=MC3R1.R20.7,reports+={safe, "any_area(any_loc(file(gnu_efi_include)))"}
-config=MC3R1.R20.7,reports+={safe, "any_area(any_loc(file(acpi_cpu_idle)))"}
-doc_end
-doc_begin="To avoid compromising readability, the macros alternative_(v)?call[0-9] are allowed
not to parenthesize their arguments."
-config=MC3R1.R20.7,reports+={safe, "any_area(any_loc(any_exp(macro(^alternative_(v)?call[0-9]$))))"}
-doc_end
-doc_begin="Uses of variadic macros that have one of their arguments defined as
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