[clang][analyzer] Fix #embed crash #107764
Merged
Conversation
This file contains 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
llvmbot
added
clang
|
@llvm/pr-subscribers-clang-static-analyzer-1 @llvm/pr-subscribers-clang Author: Nicolas van Kempen (nicovank) ChangesFix #107724. Full diff: https://github.com/llvm/llvm-project/pull/107764.diff 2 Files Affected:
diff --git a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
index 315d85319a85a9..fdabba46992b08 100644
--- a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
+++ b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
@@ -1938,6 +1938,7 @@ void ExprEngine::Visit(const Stmt *S, ExplodedNode *Pred,
case Stmt::CXXRewrittenBinaryOperatorClass:
case Stmt::RequiresExprClass:
case Expr::CXXParenListInitExprClass:
+ case Stmt::EmbedExprClass:
// Fall through.
// Cases we intentionally don't evaluate, since they don't need
@@ -2440,10 +2441,6 @@ void ExprEngine::Visit(const Stmt *S, ExplodedNode *Pred,
Bldr.addNodes(Dst);
break;
}
-
- case Stmt::EmbedExprClass:
- llvm::report_fatal_error("Support for EmbedExpr is not implemented.");
- break;
}
}
diff --git a/clang/test/Analysis/embed.c b/clang/test/Analysis/embed.c
new file mode 100644
index 00000000000000..7201bb30386fb7
--- /dev/null
+++ b/clang/test/Analysis/embed.c
@@ -0,0 +1,9 @@
+// RUN: %clang_analyze_cc1 -std=c23 -analyzer-checker=core,debug.ExprInspection -verify %s
+
+// expected-no-diagnostics
+
+int main() {
+ const unsigned char SelfBytes[] = {
+ #embed "embed.c"
+ };
+}
|
|
PS: Should this be cherry-picked into 19? |
NagyDonat
reviewed
Sep 9, 2024
There was a problem hiding this comment.
LGTM, there is no reason to crash on #embed.
I think it would be nice to have a few testcases that show the behavior of the analyzer around #embed:
- Can we produce bug reports if there is an (unrelated)
#embedexpression on the execution path? Or do we abort the analysis there? - If the analysis is not aborted, then how do we represent the contents of a memory region that's initialized by
#embed? Is itUnknownVal? OrUndefinedVal(that may be problematic)?
steakhal
approved these changes
Sep 9, 2024
Requested the backport in #107841 |
|
LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/73/builds/5193 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.
Fix #107724.