[all-commits] [llvm/llvm-project] 21be81: [analyzer] Support determining origins in a condit...

[Ryosuke Niwa via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 21be8182239a9c87a50071d122d5532037fd8305
      https://github.com/llvm/llvm-project/commit/21be8182239a9c87a50071d122d5532037fd8305
  Author: Ryosuke Niwa <rniwa at webkit.org>
  Date:   2024-05-09 (Thu, 09 May 2024)

  Changed paths:
    M clang/lib/StaticAnalyzer/Checkers/WebKit/ASTUtils.cpp
    M clang/lib/StaticAnalyzer/Checkers/WebKit/ASTUtils.h
    M clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedCallArgsChecker.cpp
    M clang/lib/StaticAnalyzer/Checkers/WebKit/UncountedLocalVarsChecker.cpp
    M clang/test/Analysis/Checkers/WebKit/call-args.cpp
    M clang/test/Analysis/Checkers/WebKit/uncounted-local-vars.cpp

  Log Message:
  -----------
  [analyzer] Support determining origins in a conditional operator in WebKit checkers. (#91143)

This PR adds the support for determining the origin of a pointer in a
conditional operator.

Because such an expression can have two distinct origins each of which
needs to be visited, this PR refactors tryToFindPtrOrigin to take a
callback instead of returning a pair.

The callback is called for the second operand and the third operand of
the conditioanl operator (i.e. E2 and E3 in E1 ? E2 : E3).

Also treat nullptr and integer literal as safe pointer origins in the
local variable checker.



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