[XEN,v3,2/2] eclair_analysis: deviate x86 emulator for Rule 16.2

Commit Message

Nicola Vetrini April 17, 2024, 7:37 p.m. UTC

MISRA C Rule 16.2 states:
"A switch label shall only be used when the most closely-enclosing
compound statement is the body of a switch statement".

Since complying with this rule of the x86 emulator would lead to
a lot of code duplication, it is deemed better to exempt those
files for this guideline.

No functional change.

Signed-off-by: Nicola Vetrini <[e-mail]>
Acked-by: Stefano Stabellini <[e-mail]>
---
 automation/eclair_analysis/ECLAIR/deviations.ecl | 7 +++++++
 docs/misra/deviations.rst                        | 6 ++++++
 2 files changed, 13 insertions(+)

Patch

diff --git a/automation/eclair_analysis/ECLAIR/deviations.ecl b/automation/eclair_analysis/ECLAIR/deviations.ecl
index 0230b41c6d1c..190f6a2fd4e0 100644
--- a/automation/eclair_analysis/ECLAIR/deviations.ecl
+++ b/automation/eclair_analysis/ECLAIR/deviations.ecl
@@ -358,6 +358,13 @@  therefore have the same behavior of a boolean"
 # Series 16.
 #
 
+-doc_begin="Complying with the Rule would entail a lot of code duplication in the implementation of the x86 emulator,
+therefore it is deemed better to leave such files as is."
+-file_tag+={x86_emulate,"^xen/arch/x86/x86_emulate/.*$"}
+-file_tag+={x86_svm_emulate,"^xen/arch/x86/hvm/svm/emulate\\.c$"}
+-config=MC3R1.R16.2,reports+={deliberate, "any_area(any_loc(file(x86_emulate||x86_svm_emulate)))"}
+-doc_end
+
 -doc_begin="Switch clauses ending with continue, goto, return statements are
 safe."
 -config=MC3R1.R16.3,terminals+={safe, "node(continue_stmt||goto_stmt||return_stmt)"}
diff --git a/docs/misra/deviations.rst b/docs/misra/deviations.rst
index 32b02905d19a..ed0c1e8ed0bf 100644
--- a/docs/misra/deviations.rst
+++ b/docs/misra/deviations.rst
@@ -296,6 +296,12 @@  Deviations related to MISRA C:2012 Rules:
        therefore have the same behavior of a boolean.
      - Project-wide deviation; tagged as `deliberate` for ECLAIR.
 
+   * - R16.2
+     - Complying with the Rule would entail a lot of code duplication in the
+       implementation of the x86 emulator, therefore it is deemed better to
+       leave such files as is.
+     - Tagged as `deliberate` for ECLAIR.
+
    * - R16.3
      - Switch clauses ending with continue, goto, return statements are safe.
      - Tagged as `safe` for ECLAIR.