| Issue |
126042
|
| Summary |
ASTImporter going into an infinite loop and consuming increasing amount of memory, when Importing a CallExpr, CompoundStmt
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
YuvrajTalukdar
|
I was trying to import a CallExpr using clang::ASTImporter, and realized the program was going into an infinite loop while consuming more and more memory. I had to forcefully kill the program since the memory consumption was continuously increasing.
On performing some further test, I realized the problem also occurs when importing a CompoundStmt, . Here is a few example where the problem occurs.
Example1
```
void foo1()
{
printf("hello");
}
void foo2()
{
foo1();// s1
}
```
Example2
```
void foo1()
{
{// s2
printf("hello");
printf("world");
}
}
```
In example 1 the problem occurs when importing statement s1 and in example 2 the problem occurs when importing CompoundStmt s2.
Can any one else confirm this issue, and is there any solution to this.
I tested this on clang version 19.1.7 and ASTImporter was initialized like this:-
`ASTImporter Importer(astContext1, astContext1.getSourceManager().getFileManager(),astContext2, astContext2.getSourceManager().getFileManager(),false,nullptr);`
On running the same inside gdb the infinite loop looks like this
```
#22 0x00007ffff4da869c in clang::ASTImporter::ImportImpl(clang::Decl*) () from /usr/lib/libclang-cpp.so.19.1
#23 0x00007ffff4d7ab93 in clang::ASTImporter::Import(clang::Decl*) () from /usr/lib/libclang-cpp.so.19.1
#24 0x00007ffff73f1316 in ?? () from /usr/lib/libclang-cpp.so.19.1
#25 0x00007ffff4da8245 in clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) ()
from /usr/lib/libclang-cpp.so.19.1
#26 0x00007ffff4da869c in clang::ASTImporter::ImportImpl(clang::Decl*) () from /usr/lib/libclang-cpp.so.19.1
#27 0x00007ffff4d7ab93 in clang::ASTImporter::Import(clang::Decl*) () from /usr/lib/libclang-cpp.so.19.1
#28 0x00007ffff73f1316 in ?? () from /usr/lib/libclang-cpp.so.19.1
#29 0x00007ffff4da8245 in clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) ()
from /usr/lib/libclang-cpp.so.19.1
#30 0x00007ffff4da869c in clang::ASTImporter::ImportImpl(clang::Decl*) () from /usr/lib/libclang-cpp.so.19.1
#31 0x00007ffff4d7ab93 in clang::ASTImporter::Import(clang::Decl*) () from /usr/lib/libclang-cpp.so.19.1
#32 0x00007ffff73f1316 in ?? () from /usr/lib/libclang-cpp.so.19.1
#33 0x00007ffff4da8245 in clang::ASTNodeImporter::VisitFunctionDecl(clang::FunctionDecl*) ()
from /usr/lib/libclang-cpp.so.19.1
```
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