| Issue |
143934
|
| Summary |
WebAssembly tables + global variables + debug info = invalid binaries
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
feedab1e
|
creating a WebAssembly table and another global variable, then compiling with debug info, yields a binary that cannot be read or linked by any llvm tool ([link](https://gcc.godbolt.org/z/hP5dPq5qx)):
```cpp
// 1.cpp
int a;
inline static __externref_t table[0];
int main() {
__externref_t get();
__builtin_wasm_table_set(table, 0, get());
}
```
if compiled with
```
clang++ -g --target=wasm32 1.cpp -c -o 1.o
```
and used like following:
```
llvm-dwarfdump 1.o
```
will yield
```
error: 1.o: invalid data relocation: _ZL5table
```
The same issue occurs when trying to link:
```
wasm-ld --no-entry 1.o -o 1.wasm
```
yields
```
wasm-ld: error: 1.o: invalid data relocation: _ZL5table
```
Notably, the same issue does not occur when we remove the declaration of `a`:
```
// 1.cpp
inline static __externref_t table[0];
int main() {
__externref_t get();
__builtin_wasm_table_set(table, 0, get());
}
```
links successfully.
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