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coverage: Don't convert symbol names to CString for FFI

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This commit is contained in:
Zalathar 2023-07-24 17:47:47 +10:00
parent e184118683
commit 4b154bc8e2
3 changed files with 18 additions and 7 deletions
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12
compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
View file

@ -25,7 +25,6 @@ use rustc_middle::ty::Instance;
use rustc_middle::ty::Ty;
use std::cell::RefCell;
use std::ffi::CString;
pub(crate) mod ffi;
pub(crate) mod map_data;
@ -332,10 +331,15 @@ fn create_pgo_func_name_var<'ll, 'tcx>(
cx: &CodegenCx<'ll, 'tcx>,
instance: Instance<'tcx>,
) -> &'ll llvm::Value {
let mangled_fn_name = CString::new(cx.tcx.symbol_name(instance).name)
.expect("error converting function name to C string");
let mangled_fn_name: &str = cx.tcx.symbol_name(instance).name;
let llfn = cx.get_fn(instance);
unsafe { llvm::LLVMRustCoverageCreatePGOFuncNameVar(llfn, mangled_fn_name.as_ptr()) }
unsafe {
llvm::LLVMRustCoverageCreatePGOFuncNameVar(
llfn,
mangled_fn_name.as_ptr().cast(),
mangled_fn_name.len(),
)
}
}
pub(crate) fn write_filenames_section_to_buffer<'a>(

6
compiler/rustc_codegen_llvm/src/llvm/ffi.rs
View file

@ -1720,7 +1720,11 @@ extern "C" {
BufferOut: &RustString,
);
pub fn LLVMRustCoverageCreatePGOFuncNameVar(F: &Value, FuncName: *const c_char) -> &Value;
pub fn LLVMRustCoverageCreatePGOFuncNameVar(
F: &Value,
FuncName: *const c_char,
FuncNameLen: size_t,
) -> &Value;
pub fn LLVMRustCoverageHashByteArray(Bytes: *const c_char, NumBytes: size_t) -> u64;
#[allow(improper_ctypes)]

7
compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
View file

@ -161,8 +161,11 @@ extern "C" void LLVMRustCoverageWriteMappingToBuffer(
CoverageMappingWriter.write(OS);
}
extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(LLVMValueRef F, const char *FuncName) {
StringRef FuncNameRef(FuncName);
extern "C" LLVMValueRef LLVMRustCoverageCreatePGOFuncNameVar(
LLVMValueRef F,
const char *FuncName,
size_t FuncNameLen) {
StringRef FuncNameRef(FuncName, FuncNameLen);
return wrap(createPGOFuncNameVar(*cast<Function>(unwrap(F)), FuncNameRef));
}