[clang] [analyzer] Ignore system headers in WebKit checkers. (PR #91103)

[Ryosuke Niwa via cfe-commits]

https://github.com/rniwa created https://github.com/llvm/llvm-project/pull/91103

None

>From e2dbb580ff7fe1f2db1ad7c81902cb8a8b5a58ed Mon Sep 17 00:00:00 2001
From: Ryosuke Niwa <rniwa at webkit.org>
Date: Sat, 4 May 2024 20:41:29 -0700
Subject: [PATCH] [analyzer] Ignore system headers in WebKit checkers.

---
 .../Checkers/WebKit/UncountedCallArgsChecker.cpp               | 3 +++
 .../Checkers/WebKit/UncountedLocalVarsChecker.cpp              | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedCallArgsChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedCallArgsChecker.cpp
index 0f40ecc7ba3000..9a178a690ff24b 100644
--- a/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedCallArgsChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedCallArgsChecker.cpp
@@ -150,6 +150,9 @@ class UncountedCallArgsChecker
   bool shouldSkipCall(const CallExpr *CE) const {
     const auto *Callee = CE->getDirectCallee();
 
+    if (BR->getSourceManager().isInSystemHeader(CE->getExprLoc()))
+      return true;
+
     if (Callee && TFA.isTrivial(Callee))
       return true;
 
diff --git a/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLocalVarsChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLocalVarsChecker.cpp
index 6036ad58cf253c..98a73810b7afca 100644
--- a/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLocalVarsChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLocalVarsChecker.cpp
@@ -230,6 +230,9 @@ class UncountedLocalVarsChecker
     if (!V->isLocalVarDecl())
       return true;
 
+    if (BR->getSourceManager().isInSystemHeader(V->getLocation()))
+      return true;
+
     return false;
   }