[v3,01/30] cocci/rte_memcpy: add script to eliminate fixed size rte_memcpy

Message ID 20240402215502.278838-2-stephen@networkplumber.org (mailing list archive)
State Superseded
Delegated to: Thomas Monjalon
Series replace rte_memcpy of fixed size with memcpy |


Context Check Description
ci/checkpatch success coding style OK

Commit Message

Stephen Hemminger April 2, 2024, 9:50 p.m. UTC
  Rte_memcpy should not be used for the simple case of copying
a fix size structure because it is slower and will hide problems
from code analysis tools. Coverity, fortify and other analyzers
special case memcpy().

Gcc (and Clang) are smart enough to inline copies which
will be faster.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
 devtools/cocci/rte_memcpy.cocci | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 devtools/cocci/rte_memcpy.cocci


diff --git a/devtools/cocci/rte_memcpy.cocci b/devtools/cocci/rte_memcpy.cocci
new file mode 100644
index 0000000000..fa1038fc06
--- /dev/null
+++ b/devtools/cocci/rte_memcpy.cocci
@@ -0,0 +1,11 @@ 
+// rte_memcpy should not be used for simple fixed size structure
+// because compiler's are smart enough to inline these.
+expression src, dst; constant size;
+- rte_memcpy(dst, src, size)
++ memcpy(dst, src, size)