[Clang] ensure mangled names are valid identifiers before being suggested in ifunc/alias attributes notes #118170
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…sted in ifunc/alias attributes notes
llvmbot
added
clang
|
@llvm/pr-subscribers-clang-codegen @llvm/pr-subscribers-clang Author: Oleksandr T. (a-tarasyuk) ChangesFixes #112205 Commit that introduced this feature - 9306ef9 Full diff: https://github.com/llvm/llvm-project/pull/118170.diff 3 Files Affected:
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index e44aefa90ab386..5c24471bbf7c93 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -763,6 +763,7 @@ Bug Fixes to C++ Support
- Fixed a bug where bounds of partially expanded pack indexing expressions were checked too early. (#GH116105)
- Fixed an assertion failure caused by using ``consteval`` in condition in consumed analyses. (#GH117385)
- Fix a crash caused by incorrect argument position in merging deduced template arguments. (#GH113659)
+- Fixed an assertion failure caused by mangled names with invalid identifiers. (#GH112205)
Bug Fixes to AST Handling
^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 7189a4689e8156..d3d5c0743a520b 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -602,7 +602,8 @@ static bool checkAliasedGlobal(
// mangled name.
for (const auto &[Decl, Name] : MangledDeclNames) {
if (const auto *ND = dyn_cast<NamedDecl>(Decl.getDecl())) {
- if (ND->getName() == GV->getName()) {
+ IdentifierInfo *II = ND->getIdentifier();
+ if (II && II->getName() == GV->getName()) {
Diags.Report(Location, diag::note_alias_mangled_name_alternative)
<< Name
<< FixItHint::CreateReplacement(
diff --git a/clang/test/CodeGen/alias.cpp b/clang/test/CodeGen/alias.cpp
index a468c31d369ed0..43be6b99ce8491 100644
--- a/clang/test/CodeGen/alias.cpp
+++ b/clang/test/CodeGen/alias.cpp
@@ -26,6 +26,9 @@ __attribute__((unused, alias("resolver"), deprecated("hahahaha, isn't C great?")
void func();
// expected-error@-2 {{alias must point to a defined variable or function}}
// expected-note@-3 {{must refer to its mangled name}}
+
+void *operator new(unsigned long) __attribute__((alias("A"))); // expected-error {{alias must point to a defined variable or function}} \
+ // expected-note {{the function or variable specified in an alias must refer to its mangled name}}
#endif
// CHECK: @_ZN4libc4log2Ed ={{.*}} alias double (double), ptr @log2
|
erichkeane
approved these changes
Dec 2, 2024
|
LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/46/builds/8786 Here is the relevant piece of the build log for the reference |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Fixes #112205
Commit that introduced this feature - 9306ef9