[PATCH] D102069: [clang][PreProcessor] Cutoff parsing after hitting completion point

Kadir Cetinkaya via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Mon May 10 01:19:49 PDT 2021


kadircet updated this revision to Diff 343996.
kadircet added a comment.

- Fix lit


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102069/new/

https://reviews.llvm.org/D102069

Files:
  clang/lib/Lex/PPDirectives.cpp
  clang/test/CodeCompletion/crash-if-directive.cpp


Index: clang/test/CodeCompletion/crash-if-directive.cpp
===================================================================
--- /dev/null
+++ clang/test/CodeCompletion/crash-if-directive.cpp
@@ -0,0 +1,6 @@
+#define FOO(X) X
+#if FOO(
+#elif FOO(
+#endif
+// RUN: %clang_cc1 -fsyntax-only -code-completion-at=%s:2:9 %s
+// RUN: not %clang_cc1 -fsyntax-only -code-completion-at=%s:3:11 %s
Index: clang/lib/Lex/PPDirectives.cpp
===================================================================
--- clang/lib/Lex/PPDirectives.cpp
+++ clang/lib/Lex/PPDirectives.cpp
@@ -595,6 +595,9 @@
           CurPPLexer->LexingRawMode = false;
           IdentifierInfo *IfNDefMacro = nullptr;
           DirectiveEvalResult DER = EvaluateDirectiveExpression(IfNDefMacro);
+          // Stop if Lexer became invalid after hitting code completion token.
+          if (!CurPPLexer)
+            return;
           const bool CondValue = DER.Conditional;
           CurPPLexer->LexingRawMode = true;
           if (Callbacks) {
@@ -3023,6 +3026,10 @@
   IdentifierInfo *IfNDefMacro = nullptr;
   const DirectiveEvalResult DER = EvaluateDirectiveExpression(IfNDefMacro);
   const bool ConditionalTrue = DER.Conditional;
+  // Lexer might become invalid if we hit code completion point while evaluating
+  // expression.
+  if (!CurPPLexer)
+    return;
 
   // If this condition is equivalent to #ifndef X, and if this is the first
   // directive seen, handle it for the multiple-include optimization.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D102069.343996.patch
Type: text/x-patch
Size: 1486 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20210510/abe02fdb/attachment.bin>


More information about the cfe-commits mailing list