From 28503d69ac204ff208d115aea30dc09d6fca8728 Mon Sep 17 00:00:00 2001 From: Michael Goulet Date: Sun, 14 Jul 2024 14:27:57 -0400 Subject: [PATCH] Fix unsafe_op_in_unsafe_fn in compiler --- compiler/rustc_abi/src/lib.rs | 4 +- compiler/rustc_codegen_llvm/src/allocator.rs | 50 ++-- compiler/rustc_codegen_llvm/src/back/lto.rs | 16 +- .../rustc_codegen_llvm/src/back/profiling.rs | 12 +- compiler/rustc_codegen_llvm/src/back/write.rs | 224 ++++++++------- compiler/rustc_codegen_llvm/src/context.rs | 259 ++++++++++-------- compiler/rustc_codegen_llvm/src/lib.rs | 6 +- .../rustc_codegen_llvm/src/llvm/diagnostic.rs | 71 ++--- compiler/rustc_codegen_llvm/src/llvm_util.rs | 16 +- compiler/rustc_codegen_llvm/src/mono_item.rs | 8 +- compiler/rustc_codegen_ssa/src/back/lto.rs | 2 +- compiler/rustc_llvm/src/lib.rs | 2 +- compiler/rustc_middle/src/ty/context/tls.rs | 2 +- .../rustc_span/src/analyze_source_file.rs | 18 +- src/bootstrap/src/core/builder.rs | 1 + 15 files changed, 383 insertions(+), 308 deletions(-) diff --git a/compiler/rustc_abi/src/lib.rs b/compiler/rustc_abi/src/lib.rs index 78332d66f0366..52ec41f643c0d 100644 --- a/compiler/rustc_abi/src/lib.rs +++ b/compiler/rustc_abi/src/lib.rs @@ -627,7 +627,7 @@ impl Step for Size { #[inline] unsafe fn forward_unchecked(start: Self, count: usize) -> Self { - Self::from_bytes(u64::forward_unchecked(start.bytes(), count)) + Self::from_bytes(unsafe { u64::forward_unchecked(start.bytes(), count) }) } #[inline] @@ -642,7 +642,7 @@ impl Step for Size { #[inline] unsafe fn backward_unchecked(start: Self, count: usize) -> Self { - Self::from_bytes(u64::backward_unchecked(start.bytes(), count)) + Self::from_bytes(unsafe { u64::backward_unchecked(start.bytes(), count) }) } } diff --git a/compiler/rustc_codegen_llvm/src/allocator.rs b/compiler/rustc_codegen_llvm/src/allocator.rs index ca37602973540..5969d9b914403 100644 --- a/compiler/rustc_codegen_llvm/src/allocator.rs +++ b/compiler/rustc_codegen_llvm/src/allocator.rs @@ -21,14 +21,16 @@ pub(crate) unsafe fn codegen( ) { let llcx = &*module_llvm.llcx; let llmod = module_llvm.llmod(); - let usize = match tcx.sess.target.pointer_width { - 16 => llvm::LLVMInt16TypeInContext(llcx), - 32 => llvm::LLVMInt32TypeInContext(llcx), - 64 => llvm::LLVMInt64TypeInContext(llcx), - tws => bug!("Unsupported target word size for int: {}", tws), + let usize = unsafe { + match tcx.sess.target.pointer_width { + 16 => llvm::LLVMInt16TypeInContext(llcx), + 32 => llvm::LLVMInt32TypeInContext(llcx), + 64 => llvm::LLVMInt64TypeInContext(llcx), + tws => bug!("Unsupported target word size for int: {}", tws), + } }; - let i8 = llvm::LLVMInt8TypeInContext(llcx); - let i8p = llvm::LLVMPointerTypeInContext(llcx, 0); + let i8 = unsafe { llvm::LLVMInt8TypeInContext(llcx) }; + let i8p = unsafe { llvm::LLVMPointerTypeInContext(llcx, 0) }; if kind == AllocatorKind::Default { for method in ALLOCATOR_METHODS { @@ -73,23 +75,25 @@ pub(crate) unsafe fn codegen( true, ); - // __rust_alloc_error_handler_should_panic - let name = OomStrategy::SYMBOL; - let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8); - if tcx.sess.default_hidden_visibility() { - llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden); - } - let val = tcx.sess.opts.unstable_opts.oom.should_panic(); - let llval = llvm::LLVMConstInt(i8, val as u64, False); - llvm::LLVMSetInitializer(ll_g, llval); - - let name = NO_ALLOC_SHIM_IS_UNSTABLE; - let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8); - if tcx.sess.default_hidden_visibility() { - llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden); + unsafe { + // __rust_alloc_error_handler_should_panic + let name = OomStrategy::SYMBOL; + let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8); + if tcx.sess.default_hidden_visibility() { + llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden); + } + let val = tcx.sess.opts.unstable_opts.oom.should_panic(); + let llval = llvm::LLVMConstInt(i8, val as u64, False); + llvm::LLVMSetInitializer(ll_g, llval); + + let name = NO_ALLOC_SHIM_IS_UNSTABLE; + let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8); + if tcx.sess.default_hidden_visibility() { + llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden); + } + let llval = llvm::LLVMConstInt(i8, 0, False); + llvm::LLVMSetInitializer(ll_g, llval); } - let llval = llvm::LLVMConstInt(i8, 0, False); - llvm::LLVMSetInitializer(ll_g, llval); if tcx.sess.opts.debuginfo != DebugInfo::None { let dbg_cx = debuginfo::CodegenUnitDebugContext::new(llmod); diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs index aff3e3d707608..aef672631c813 100644 --- a/compiler/rustc_codegen_llvm/src/back/lto.rs +++ b/compiler/rustc_codegen_llvm/src/back/lto.rs @@ -727,7 +727,7 @@ pub unsafe fn optimize_thin_module( // into that context. One day, however, we may do this for upstream // crates but for locally codegened modules we may be able to reuse // that LLVM Context and Module. - let llcx = llvm::LLVMRustContextCreate(cgcx.fewer_names); + let llcx = unsafe { llvm::LLVMRustContextCreate(cgcx.fewer_names) }; let llmod_raw = parse_module(llcx, module_name, thin_module.data(), dcx)? as *const _; let mut module = ModuleCodegen { module_llvm: ModuleLlvm { llmod_raw, llcx, tm: ManuallyDrop::new(tm) }, @@ -750,7 +750,9 @@ pub unsafe fn optimize_thin_module( { let _timer = cgcx.prof.generic_activity_with_arg("LLVM_thin_lto_rename", thin_module.name()); - if !llvm::LLVMRustPrepareThinLTORename(thin_module.shared.data.0, llmod, target) { + if unsafe { + !llvm::LLVMRustPrepareThinLTORename(thin_module.shared.data.0, llmod, target) + } { return Err(write::llvm_err(dcx, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-rename"); @@ -760,7 +762,8 @@ pub unsafe fn optimize_thin_module( let _timer = cgcx .prof .generic_activity_with_arg("LLVM_thin_lto_resolve_weak", thin_module.name()); - if !llvm::LLVMRustPrepareThinLTOResolveWeak(thin_module.shared.data.0, llmod) { + if unsafe { !llvm::LLVMRustPrepareThinLTOResolveWeak(thin_module.shared.data.0, llmod) } + { return Err(write::llvm_err(dcx, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-resolve"); @@ -770,7 +773,8 @@ pub unsafe fn optimize_thin_module( let _timer = cgcx .prof .generic_activity_with_arg("LLVM_thin_lto_internalize", thin_module.name()); - if !llvm::LLVMRustPrepareThinLTOInternalize(thin_module.shared.data.0, llmod) { + if unsafe { !llvm::LLVMRustPrepareThinLTOInternalize(thin_module.shared.data.0, llmod) } + { return Err(write::llvm_err(dcx, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-internalize"); @@ -779,7 +783,9 @@ pub unsafe fn optimize_thin_module( { let _timer = cgcx.prof.generic_activity_with_arg("LLVM_thin_lto_import", thin_module.name()); - if !llvm::LLVMRustPrepareThinLTOImport(thin_module.shared.data.0, llmod, target) { + if unsafe { + !llvm::LLVMRustPrepareThinLTOImport(thin_module.shared.data.0, llmod, target) + } { return Err(write::llvm_err(dcx, LlvmError::PrepareThinLtoModule)); } save_temp_bitcode(cgcx, &module, "thin-lto-after-import"); diff --git a/compiler/rustc_codegen_llvm/src/back/profiling.rs b/compiler/rustc_codegen_llvm/src/back/profiling.rs index 2741f7d848e79..2eee9f8c5a3ec 100644 --- a/compiler/rustc_codegen_llvm/src/back/profiling.rs +++ b/compiler/rustc_codegen_llvm/src/back/profiling.rs @@ -46,13 +46,15 @@ pub unsafe extern "C" fn selfprofile_before_pass_callback( pass_name: *const c_char, ir_name: *const c_char, ) { - let llvm_self_profiler = &mut *(llvm_self_profiler as *mut LlvmSelfProfiler<'_>); - let pass_name = CStr::from_ptr(pass_name).to_str().expect("valid UTF-8"); - let ir_name = CStr::from_ptr(ir_name).to_str().expect("valid UTF-8"); - llvm_self_profiler.before_pass_callback(pass_name, ir_name); + unsafe { + let llvm_self_profiler = &mut *(llvm_self_profiler as *mut LlvmSelfProfiler<'_>); + let pass_name = CStr::from_ptr(pass_name).to_str().expect("valid UTF-8"); + let ir_name = CStr::from_ptr(ir_name).to_str().expect("valid UTF-8"); + llvm_self_profiler.before_pass_callback(pass_name, ir_name); + } } pub unsafe extern "C" fn selfprofile_after_pass_callback(llvm_self_profiler: *mut c_void) { - let llvm_self_profiler = &mut *(llvm_self_profiler as *mut LlvmSelfProfiler<'_>); + let llvm_self_profiler = unsafe { &mut *(llvm_self_profiler as *mut LlvmSelfProfiler<'_>) }; llvm_self_profiler.after_pass_callback(); } diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs index 2fda19bf0c914..ddd52e80edff1 100644 --- a/compiler/rustc_codegen_llvm/src/back/write.rs +++ b/compiler/rustc_codegen_llvm/src/back/write.rs @@ -428,9 +428,10 @@ unsafe extern "C" fn diagnostic_handler(info: &DiagnosticInfo, user: *mut c_void if user.is_null() { return; } - let (cgcx, dcx) = *(user as *const (&CodegenContext, DiagCtxtHandle<'_>)); + let (cgcx, dcx) = + unsafe { *(user as *const (&CodegenContext, DiagCtxtHandle<'_>)) }; - match llvm::diagnostic::Diagnostic::unpack(info) { + match unsafe { llvm::diagnostic::Diagnostic::unpack(info) } { llvm::diagnostic::InlineAsm(inline) => { report_inline_asm(cgcx, inline.message, inline.level, inline.cookie, inline.source); } @@ -454,14 +455,14 @@ unsafe extern "C" fn diagnostic_handler(info: &DiagnosticInfo, user: *mut c_void }); } llvm::diagnostic::PGO(diagnostic_ref) | llvm::diagnostic::Linker(diagnostic_ref) => { - let message = llvm::build_string(|s| { + let message = llvm::build_string(|s| unsafe { llvm::LLVMRustWriteDiagnosticInfoToString(diagnostic_ref, s) }) .expect("non-UTF8 diagnostic"); dcx.emit_warn(FromLlvmDiag { message }); } llvm::diagnostic::Unsupported(diagnostic_ref) => { - let message = llvm::build_string(|s| { + let message = llvm::build_string(|s| unsafe { llvm::LLVMRustWriteDiagnosticInfoToString(diagnostic_ref, s) }) .expect("non-UTF8 diagnostic"); @@ -564,37 +565,39 @@ pub(crate) unsafe fn llvm_optimize( let llvm_plugins = config.llvm_plugins.join(","); - let result = llvm::LLVMRustOptimize( - module.module_llvm.llmod(), - &*module.module_llvm.tm, - to_pass_builder_opt_level(opt_level), - opt_stage, - cgcx.opts.cg.linker_plugin_lto.enabled(), - config.no_prepopulate_passes, - config.verify_llvm_ir, - using_thin_buffers, - config.merge_functions, - unroll_loops, - config.vectorize_slp, - config.vectorize_loop, - config.no_builtins, - config.emit_lifetime_markers, - sanitizer_options.as_ref(), - pgo_gen_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), - pgo_use_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), - config.instrument_coverage, - instr_profile_output_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), - config.instrument_gcov, - pgo_sample_use_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), - config.debug_info_for_profiling, - llvm_selfprofiler, - selfprofile_before_pass_callback, - selfprofile_after_pass_callback, - extra_passes.as_ptr().cast(), - extra_passes.len(), - llvm_plugins.as_ptr().cast(), - llvm_plugins.len(), - ); + let result = unsafe { + llvm::LLVMRustOptimize( + module.module_llvm.llmod(), + &*module.module_llvm.tm, + to_pass_builder_opt_level(opt_level), + opt_stage, + cgcx.opts.cg.linker_plugin_lto.enabled(), + config.no_prepopulate_passes, + config.verify_llvm_ir, + using_thin_buffers, + config.merge_functions, + unroll_loops, + config.vectorize_slp, + config.vectorize_loop, + config.no_builtins, + config.emit_lifetime_markers, + sanitizer_options.as_ref(), + pgo_gen_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), + pgo_use_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), + config.instrument_coverage, + instr_profile_output_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), + config.instrument_gcov, + pgo_sample_use_path.as_ref().map_or(std::ptr::null(), |s| s.as_ptr()), + config.debug_info_for_profiling, + llvm_selfprofiler, + selfprofile_before_pass_callback, + selfprofile_after_pass_callback, + extra_passes.as_ptr().cast(), + extra_passes.len(), + llvm_plugins.as_ptr().cast(), + llvm_plugins.len(), + ) + }; result.into_result().map_err(|()| llvm_err(dcx, LlvmError::RunLlvmPasses)) } @@ -617,7 +620,7 @@ pub(crate) unsafe fn optimize( if config.emit_no_opt_bc { let out = cgcx.output_filenames.temp_path_ext("no-opt.bc", module_name); let out = path_to_c_string(&out); - llvm::LLVMWriteBitcodeToFile(llmod, out.as_ptr()); + unsafe { llvm::LLVMWriteBitcodeToFile(llmod, out.as_ptr()) }; } if let Some(opt_level) = config.opt_level { @@ -627,7 +630,7 @@ pub(crate) unsafe fn optimize( _ if cgcx.opts.cg.linker_plugin_lto.enabled() => llvm::OptStage::PreLinkThinLTO, _ => llvm::OptStage::PreLinkNoLTO, }; - return llvm_optimize(cgcx, dcx, module, config, opt_level, opt_stage); + return unsafe { llvm_optimize(cgcx, dcx, module, config, opt_level, opt_stage) }; } Ok(()) } @@ -692,10 +695,12 @@ pub(crate) unsafe fn codegen( where F: FnOnce(&'ll mut PassManager<'ll>) -> R, { - let cpm = llvm::LLVMCreatePassManager(); - llvm::LLVMAddAnalysisPasses(tm, cpm); - llvm::LLVMRustAddLibraryInfo(cpm, llmod, no_builtins); - f(cpm) + unsafe { + let cpm = llvm::LLVMCreatePassManager(); + llvm::LLVMAddAnalysisPasses(tm, cpm); + llvm::LLVMRustAddLibraryInfo(cpm, llmod, no_builtins); + f(cpm) + } } // Two things to note: @@ -757,7 +762,9 @@ pub(crate) unsafe fn codegen( let _timer = cgcx .prof .generic_activity_with_arg("LLVM_module_codegen_embed_bitcode", &*module.name); - embed_bitcode(cgcx, llcx, llmod, &config.bc_cmdline, data); + unsafe { + embed_bitcode(cgcx, llcx, llmod, &config.bc_cmdline, data); + } } } @@ -793,7 +800,8 @@ pub(crate) unsafe fn codegen( cursor.position() as size_t } - let result = llvm::LLVMRustPrintModule(llmod, out_c.as_ptr(), demangle_callback); + let result = + unsafe { llvm::LLVMRustPrintModule(llmod, out_c.as_ptr(), demangle_callback) }; if result == llvm::LLVMRustResult::Success { record_artifact_size(&cgcx.prof, "llvm_ir", &out); @@ -812,22 +820,24 @@ pub(crate) unsafe fn codegen( // binaries. So we must clone the module to produce the asm output // if we are also producing object code. let llmod = if let EmitObj::ObjectCode(_) = config.emit_obj { - llvm::LLVMCloneModule(llmod) + unsafe { llvm::LLVMCloneModule(llmod) } } else { llmod }; - with_codegen(tm, llmod, config.no_builtins, |cpm| { - write_output_file( - dcx, - tm, - cpm, - llmod, - &path, - None, - llvm::FileType::AssemblyFile, - &cgcx.prof, - ) - })?; + unsafe { + with_codegen(tm, llmod, config.no_builtins, |cpm| { + write_output_file( + dcx, + tm, + cpm, + llmod, + &path, + None, + llvm::FileType::AssemblyFile, + &cgcx.prof, + ) + })?; + } } match config.emit_obj { @@ -851,18 +861,20 @@ pub(crate) unsafe fn codegen( (_, SplitDwarfKind::Split) => Some(dwo_out.as_path()), }; - with_codegen(tm, llmod, config.no_builtins, |cpm| { - write_output_file( - dcx, - tm, - cpm, - llmod, - &obj_out, - dwo_out, - llvm::FileType::ObjectFile, - &cgcx.prof, - ) - })?; + unsafe { + with_codegen(tm, llmod, config.no_builtins, |cpm| { + write_output_file( + dcx, + tm, + cpm, + llmod, + &obj_out, + dwo_out, + llvm::FileType::ObjectFile, + &cgcx.prof, + ) + })?; + } } EmitObj::Bitcode => { @@ -1013,44 +1025,46 @@ unsafe fn embed_bitcode( // reason (see issue #90326 for historical background). let is_aix = target_is_aix(cgcx); let is_apple = target_is_apple(cgcx); - if is_apple || is_aix || cgcx.opts.target_triple.triple().starts_with("wasm") { - // We don't need custom section flags, create LLVM globals. - let llconst = common::bytes_in_context(llcx, bitcode); - let llglobal = llvm::LLVMAddGlobal( - llmod, - common::val_ty(llconst), - c"rustc.embedded.module".as_ptr().cast(), - ); - llvm::LLVMSetInitializer(llglobal, llconst); - - let section = bitcode_section_name(cgcx); - llvm::LLVMSetSection(llglobal, section.as_ptr().cast()); - llvm::LLVMRustSetLinkage(llglobal, llvm::Linkage::PrivateLinkage); - llvm::LLVMSetGlobalConstant(llglobal, llvm::True); - - let llconst = common::bytes_in_context(llcx, cmdline.as_bytes()); - let llglobal = llvm::LLVMAddGlobal( - llmod, - common::val_ty(llconst), - c"rustc.embedded.cmdline".as_ptr().cast(), - ); - llvm::LLVMSetInitializer(llglobal, llconst); - let section = if is_apple { - c"__LLVM,__cmdline" - } else if is_aix { - c".info" + unsafe { + if is_apple || is_aix || cgcx.opts.target_triple.triple().starts_with("wasm") { + // We don't need custom section flags, create LLVM globals. + let llconst = common::bytes_in_context(llcx, bitcode); + let llglobal = llvm::LLVMAddGlobal( + llmod, + common::val_ty(llconst), + c"rustc.embedded.module".as_ptr().cast(), + ); + llvm::LLVMSetInitializer(llglobal, llconst); + + let section = bitcode_section_name(cgcx); + llvm::LLVMSetSection(llglobal, section.as_ptr().cast()); + llvm::LLVMRustSetLinkage(llglobal, llvm::Linkage::PrivateLinkage); + llvm::LLVMSetGlobalConstant(llglobal, llvm::True); + + let llconst = common::bytes_in_context(llcx, cmdline.as_bytes()); + let llglobal = llvm::LLVMAddGlobal( + llmod, + common::val_ty(llconst), + c"rustc.embedded.cmdline".as_ptr().cast(), + ); + llvm::LLVMSetInitializer(llglobal, llconst); + let section = if is_apple { + c"__LLVM,__cmdline" + } else if is_aix { + c".info" + } else { + c".llvmcmd" + }; + llvm::LLVMSetSection(llglobal, section.as_ptr().cast()); + llvm::LLVMRustSetLinkage(llglobal, llvm::Linkage::PrivateLinkage); } else { - c".llvmcmd" - }; - llvm::LLVMSetSection(llglobal, section.as_ptr().cast()); - llvm::LLVMRustSetLinkage(llglobal, llvm::Linkage::PrivateLinkage); - } else { - // We need custom section flags, so emit module-level inline assembly. - let section_flags = if cgcx.is_pe_coff { "n" } else { "e" }; - let asm = create_section_with_flags_asm(".llvmbc", section_flags, bitcode); - llvm::LLVMAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len()); - let asm = create_section_with_flags_asm(".llvmcmd", section_flags, cmdline.as_bytes()); - llvm::LLVMAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len()); + // We need custom section flags, so emit module-level inline assembly. + let section_flags = if cgcx.is_pe_coff { "n" } else { "e" }; + let asm = create_section_with_flags_asm(".llvmbc", section_flags, bitcode); + llvm::LLVMAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len()); + let asm = create_section_with_flags_asm(".llvmcmd", section_flags, cmdline.as_bytes()); + llvm::LLVMAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len()); + } } } diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs index 77beb9a6bb386..49677dcf12f73 100644 --- a/compiler/rustc_codegen_llvm/src/context.rs +++ b/compiler/rustc_codegen_llvm/src/context.rs @@ -120,7 +120,7 @@ pub unsafe fn create_module<'ll>( ) -> &'ll llvm::Module { let sess = tcx.sess; let mod_name = SmallCStr::new(mod_name); - let llmod = llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx); + let llmod = unsafe { llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx) }; let mut target_data_layout = sess.target.data_layout.to_string(); let llvm_version = llvm_util::get_version(); @@ -153,11 +153,14 @@ pub unsafe fn create_module<'ll>( // Ensure the data-layout values hardcoded remain the defaults. { let tm = crate::back::write::create_informational_target_machine(tcx.sess); - llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, &tm); + unsafe { + llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, &tm); + } - let llvm_data_layout = llvm::LLVMGetDataLayoutStr(llmod); - let llvm_data_layout = str::from_utf8(CStr::from_ptr(llvm_data_layout).to_bytes()) - .expect("got a non-UTF8 data-layout from LLVM"); + let llvm_data_layout = unsafe { llvm::LLVMGetDataLayoutStr(llmod) }; + let llvm_data_layout = + str::from_utf8(unsafe { CStr::from_ptr(llvm_data_layout) }.to_bytes()) + .expect("got a non-UTF8 data-layout from LLVM"); if target_data_layout != llvm_data_layout { tcx.dcx().emit_err(crate::errors::MismatchedDataLayout { @@ -170,20 +173,28 @@ pub unsafe fn create_module<'ll>( } let data_layout = SmallCStr::new(&target_data_layout); - llvm::LLVMSetDataLayout(llmod, data_layout.as_ptr()); + unsafe { + llvm::LLVMSetDataLayout(llmod, data_layout.as_ptr()); + } let llvm_target = SmallCStr::new(&sess.target.llvm_target); - llvm::LLVMRustSetNormalizedTarget(llmod, llvm_target.as_ptr()); + unsafe { + llvm::LLVMRustSetNormalizedTarget(llmod, llvm_target.as_ptr()); + } let reloc_model = sess.relocation_model(); if matches!(reloc_model, RelocModel::Pic | RelocModel::Pie) { - llvm::LLVMRustSetModulePICLevel(llmod); + unsafe { + llvm::LLVMRustSetModulePICLevel(llmod); + } // PIE is potentially more effective than PIC, but can only be used in executables. // If all our outputs are executables, then we can relax PIC to PIE. if reloc_model == RelocModel::Pie || tcx.crate_types().iter().all(|ty| *ty == CrateType::Executable) { - llvm::LLVMRustSetModulePIELevel(llmod); + unsafe { + llvm::LLVMRustSetModulePIELevel(llmod); + } } } @@ -192,95 +203,109 @@ pub unsafe fn create_module<'ll>( // longer jumps) if a larger code model is used with a smaller one. // // See https://reviews.llvm.org/D52322 and https://reviews.llvm.org/D52323. - llvm::LLVMRustSetModuleCodeModel(llmod, to_llvm_code_model(sess.code_model())); + unsafe { + llvm::LLVMRustSetModuleCodeModel(llmod, to_llvm_code_model(sess.code_model())); + } // If skipping the PLT is enabled, we need to add some module metadata // to ensure intrinsic calls don't use it. if !sess.needs_plt() { let avoid_plt = c"RtLibUseGOT".as_ptr().cast(); - llvm::LLVMRustAddModuleFlagU32(llmod, llvm::LLVMModFlagBehavior::Warning, avoid_plt, 1); + unsafe { + llvm::LLVMRustAddModuleFlagU32(llmod, llvm::LLVMModFlagBehavior::Warning, avoid_plt, 1); + } } // Enable canonical jump tables if CFI is enabled. (See https://reviews.llvm.org/D65629.) if sess.is_sanitizer_cfi_canonical_jump_tables_enabled() && sess.is_sanitizer_cfi_enabled() { let canonical_jump_tables = c"CFI Canonical Jump Tables".as_ptr().cast(); - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Override, - canonical_jump_tables, - 1, - ); + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Override, + canonical_jump_tables, + 1, + ); + } } // Enable LTO unit splitting if specified or if CFI is enabled. (See https://reviews.llvm.org/D53891.) if sess.is_split_lto_unit_enabled() || sess.is_sanitizer_cfi_enabled() { let enable_split_lto_unit = c"EnableSplitLTOUnit".as_ptr().cast(); - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Override, - enable_split_lto_unit, - 1, - ); + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Override, + enable_split_lto_unit, + 1, + ); + } } // Add "kcfi" module flag if KCFI is enabled. (See https://reviews.llvm.org/D119296.) if sess.is_sanitizer_kcfi_enabled() { let kcfi = c"kcfi".as_ptr().cast(); - llvm::LLVMRustAddModuleFlagU32(llmod, llvm::LLVMModFlagBehavior::Override, kcfi, 1); + unsafe { + llvm::LLVMRustAddModuleFlagU32(llmod, llvm::LLVMModFlagBehavior::Override, kcfi, 1); + } } // Control Flow Guard is currently only supported by the MSVC linker on Windows. if sess.target.is_like_msvc { - match sess.opts.cg.control_flow_guard { - CFGuard::Disabled => {} - CFGuard::NoChecks => { - // Set `cfguard=1` module flag to emit metadata only. - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Warning, - c"cfguard".as_ptr() as *const _, - 1, - ) - } - CFGuard::Checks => { - // Set `cfguard=2` module flag to emit metadata and checks. - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Warning, - c"cfguard".as_ptr() as *const _, - 2, - ) + unsafe { + match sess.opts.cg.control_flow_guard { + CFGuard::Disabled => {} + CFGuard::NoChecks => { + // Set `cfguard=1` module flag to emit metadata only. + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Warning, + c"cfguard".as_ptr() as *const _, + 1, + ) + } + CFGuard::Checks => { + // Set `cfguard=2` module flag to emit metadata and checks. + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Warning, + c"cfguard".as_ptr() as *const _, + 2, + ) + } } } } if let Some(BranchProtection { bti, pac_ret }) = sess.opts.unstable_opts.branch_protection { if sess.target.arch == "aarch64" { - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Min, - c"branch-target-enforcement".as_ptr().cast(), - bti.into(), - ); - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Min, - c"sign-return-address".as_ptr().cast(), - pac_ret.is_some().into(), - ); - let pac_opts = pac_ret.unwrap_or(PacRet { leaf: false, key: PAuthKey::A }); - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Min, - c"sign-return-address-all".as_ptr().cast(), - pac_opts.leaf.into(), - ); - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Min, - c"sign-return-address-with-bkey".as_ptr().cast(), - u32::from(pac_opts.key == PAuthKey::B), - ); + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Min, + c"branch-target-enforcement".as_ptr().cast(), + bti.into(), + ); + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Min, + c"sign-return-address".as_ptr().cast(), + pac_ret.is_some().into(), + ); + let pac_opts = pac_ret.unwrap_or(PacRet { leaf: false, key: PAuthKey::A }); + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Min, + c"sign-return-address-all".as_ptr().cast(), + pac_opts.leaf.into(), + ); + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Min, + c"sign-return-address-with-bkey".as_ptr().cast(), + u32::from(pac_opts.key == PAuthKey::B), + ); + } } else { bug!( "branch-protection used on non-AArch64 target; \ @@ -291,39 +316,47 @@ pub unsafe fn create_module<'ll>( // Pass on the control-flow protection flags to LLVM (equivalent to `-fcf-protection` in Clang). if let CFProtection::Branch | CFProtection::Full = sess.opts.unstable_opts.cf_protection { - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Override, - c"cf-protection-branch".as_ptr().cast(), - 1, - ) + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Override, + c"cf-protection-branch".as_ptr().cast(), + 1, + ); + } } if let CFProtection::Return | CFProtection::Full = sess.opts.unstable_opts.cf_protection { - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Override, - c"cf-protection-return".as_ptr().cast(), - 1, - ) + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Override, + c"cf-protection-return".as_ptr().cast(), + 1, + ); + } } if sess.opts.unstable_opts.virtual_function_elimination { - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Error, - c"Virtual Function Elim".as_ptr().cast(), - 1, - ); + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Error, + c"Virtual Function Elim".as_ptr().cast(), + 1, + ); + } } // Set module flag to enable Windows EHCont Guard (/guard:ehcont). if sess.opts.unstable_opts.ehcont_guard { - llvm::LLVMRustAddModuleFlagU32( - llmod, - llvm::LLVMModFlagBehavior::Warning, - c"ehcontguard".as_ptr() as *const _, - 1, - ) + unsafe { + llvm::LLVMRustAddModuleFlagU32( + llmod, + llvm::LLVMModFlagBehavior::Warning, + c"ehcontguard".as_ptr() as *const _, + 1, + ) + } } // Insert `llvm.ident` metadata. @@ -333,16 +366,20 @@ pub unsafe fn create_module<'ll>( #[allow(clippy::option_env_unwrap)] let rustc_producer = format!("rustc version {}", option_env!("CFG_VERSION").expect("CFG_VERSION")); - let name_metadata = llvm::LLVMMDStringInContext( - llcx, - rustc_producer.as_ptr().cast(), - rustc_producer.as_bytes().len() as c_uint, - ); - llvm::LLVMAddNamedMetadataOperand( - llmod, - c"llvm.ident".as_ptr(), - llvm::LLVMMDNodeInContext(llcx, &name_metadata, 1), - ); + let name_metadata = unsafe { + llvm::LLVMMDStringInContext( + llcx, + rustc_producer.as_ptr().cast(), + rustc_producer.as_bytes().len() as c_uint, + ) + }; + unsafe { + llvm::LLVMAddNamedMetadataOperand( + llmod, + c"llvm.ident".as_ptr(), + llvm::LLVMMDNodeInContext(llcx, &name_metadata, 1), + ); + } // Emit RISC-V specific target-abi metadata // to workaround lld as the LTO plugin not @@ -351,13 +388,15 @@ pub unsafe fn create_module<'ll>( // If llvm_abiname is empty, emit nothing. let llvm_abiname = &sess.target.options.llvm_abiname; if matches!(sess.target.arch.as_ref(), "riscv32" | "riscv64") && !llvm_abiname.is_empty() { - llvm::LLVMRustAddModuleFlagString( - llmod, - llvm::LLVMModFlagBehavior::Error, - c"target-abi".as_ptr(), - llvm_abiname.as_ptr().cast(), - llvm_abiname.len(), - ); + unsafe { + llvm::LLVMRustAddModuleFlagString( + llmod, + llvm::LLVMModFlagBehavior::Error, + c"target-abi".as_ptr(), + llvm_abiname.as_ptr().cast(), + llvm_abiname.len(), + ); + } } // Add module flags specified via -Z llvm_module_flag @@ -375,7 +414,7 @@ pub unsafe fn create_module<'ll>( // We already checked this during option parsing _ => unreachable!(), }; - llvm::LLVMRustAddModuleFlagU32(llmod, behavior, key.as_ptr().cast(), *value) + unsafe { llvm::LLVMRustAddModuleFlagU32(llmod, behavior, key.as_ptr().cast(), *value) } } llmod diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs index ed0989a0ba413..a96993b9aba74 100644 --- a/compiler/rustc_codegen_llvm/src/lib.rs +++ b/compiler/rustc_codegen_llvm/src/lib.rs @@ -216,7 +216,7 @@ impl WriteBackendMethods for LlvmCodegenBackend { module: &ModuleCodegen, config: &ModuleConfig, ) -> Result<(), FatalError> { - back::write::optimize(cgcx, dcx, module, config) + unsafe { back::write::optimize(cgcx, dcx, module, config) } } fn optimize_fat( cgcx: &CodegenContext, @@ -230,7 +230,7 @@ impl WriteBackendMethods for LlvmCodegenBackend { cgcx: &CodegenContext, thin: ThinModule, ) -> Result, FatalError> { - back::lto::optimize_thin_module(thin, cgcx) + unsafe { back::lto::optimize_thin_module(thin, cgcx) } } unsafe fn codegen( cgcx: &CodegenContext, @@ -238,7 +238,7 @@ impl WriteBackendMethods for LlvmCodegenBackend { module: ModuleCodegen, config: &ModuleConfig, ) -> Result { - back::write::codegen(cgcx, dcx, module, config) + unsafe { back::write::codegen(cgcx, dcx, module, config) } } fn prepare_thin( module: ModuleCodegen, diff --git a/compiler/rustc_codegen_llvm/src/llvm/diagnostic.rs b/compiler/rustc_codegen_llvm/src/llvm/diagnostic.rs index f9b28178ddb97..73e1b08a3d77a 100644 --- a/compiler/rustc_codegen_llvm/src/llvm/diagnostic.rs +++ b/compiler/rustc_codegen_llvm/src/llvm/diagnostic.rs @@ -40,7 +40,7 @@ impl<'ll> OptimizationDiagnostic<'ll> { let mut filename = None; let pass_name = super::build_string(|pass_name| { message = super::build_string(|message| { - filename = super::build_string(|filename| { + filename = super::build_string(|filename| unsafe { super::LLVMRustUnpackOptimizationDiagnostic( di, pass_name, @@ -91,7 +91,7 @@ impl SrcMgrDiagnostic { let mut ranges = [0; 8]; let mut num_ranges = ranges.len() / 2; let message = super::build_string(|message| { - buffer = super::build_string(|buffer| { + buffer = super::build_string(|buffer| unsafe { have_source = super::LLVMRustUnpackSMDiagnostic( diag, message, @@ -134,7 +134,9 @@ impl InlineAsmDiagnostic { let mut message = None; let mut level = super::DiagnosticLevel::Error; - super::LLVMRustUnpackInlineAsmDiagnostic(di, &mut level, &mut cookie, &mut message); + unsafe { + super::LLVMRustUnpackInlineAsmDiagnostic(di, &mut level, &mut cookie, &mut message); + } InlineAsmDiagnostic { level, @@ -146,7 +148,8 @@ impl InlineAsmDiagnostic { unsafe fn unpackSrcMgr(di: &DiagnosticInfo) -> Self { let mut cookie = 0; - let smdiag = SrcMgrDiagnostic::unpack(super::LLVMRustGetSMDiagnostic(di, &mut cookie)); + let smdiag = + unsafe { SrcMgrDiagnostic::unpack(super::LLVMRustGetSMDiagnostic(di, &mut cookie)) }; InlineAsmDiagnostic { level: smdiag.level, cookie: cookie.into(), @@ -170,44 +173,46 @@ pub enum Diagnostic<'ll> { impl<'ll> Diagnostic<'ll> { pub unsafe fn unpack(di: &'ll DiagnosticInfo) -> Self { use super::DiagnosticKind as Dk; - let kind = super::LLVMRustGetDiagInfoKind(di); - match kind { - Dk::InlineAsm => InlineAsm(InlineAsmDiagnostic::unpackInlineAsm(di)), + unsafe { + let kind = super::LLVMRustGetDiagInfoKind(di); + match kind { + Dk::InlineAsm => InlineAsm(InlineAsmDiagnostic::unpackInlineAsm(di)), - Dk::OptimizationRemark => { - Optimization(OptimizationDiagnostic::unpack(OptimizationRemark, di)) - } - Dk::OptimizationRemarkOther => { - Optimization(OptimizationDiagnostic::unpack(OptimizationRemarkOther, di)) - } - Dk::OptimizationRemarkMissed => { - Optimization(OptimizationDiagnostic::unpack(OptimizationMissed, di)) - } + Dk::OptimizationRemark => { + Optimization(OptimizationDiagnostic::unpack(OptimizationRemark, di)) + } + Dk::OptimizationRemarkOther => { + Optimization(OptimizationDiagnostic::unpack(OptimizationRemarkOther, di)) + } + Dk::OptimizationRemarkMissed => { + Optimization(OptimizationDiagnostic::unpack(OptimizationMissed, di)) + } - Dk::OptimizationRemarkAnalysis => { - Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysis, di)) - } + Dk::OptimizationRemarkAnalysis => { + Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysis, di)) + } - Dk::OptimizationRemarkAnalysisFPCommute => { - Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysisFPCommute, di)) - } + Dk::OptimizationRemarkAnalysisFPCommute => { + Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysisFPCommute, di)) + } - Dk::OptimizationRemarkAnalysisAliasing => { - Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysisAliasing, di)) - } + Dk::OptimizationRemarkAnalysisAliasing => { + Optimization(OptimizationDiagnostic::unpack(OptimizationAnalysisAliasing, di)) + } - Dk::OptimizationFailure => { - Optimization(OptimizationDiagnostic::unpack(OptimizationFailure, di)) - } + Dk::OptimizationFailure => { + Optimization(OptimizationDiagnostic::unpack(OptimizationFailure, di)) + } - Dk::PGOProfile => PGO(di), - Dk::Linker => Linker(di), - Dk::Unsupported => Unsupported(di), + Dk::PGOProfile => PGO(di), + Dk::Linker => Linker(di), + Dk::Unsupported => Unsupported(di), - Dk::SrcMgr => InlineAsm(InlineAsmDiagnostic::unpackSrcMgr(di)), + Dk::SrcMgr => InlineAsm(InlineAsmDiagnostic::unpackSrcMgr(di)), - _ => UnknownDiagnostic(di), + _ => UnknownDiagnostic(di), + } } } } diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs index 0e89e66be49a0..98dc8ac86d2b3 100644 --- a/compiler/rustc_codegen_llvm/src/llvm_util.rs +++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs @@ -49,12 +49,16 @@ unsafe fn configure_llvm(sess: &Session) { let mut llvm_c_strs = Vec::with_capacity(n_args + 1); let mut llvm_args = Vec::with_capacity(n_args + 1); - llvm::LLVMRustInstallErrorHandlers(); + unsafe { + llvm::LLVMRustInstallErrorHandlers(); + } // On Windows, an LLVM assertion will open an Abort/Retry/Ignore dialog // box for the purpose of launching a debugger. However, on CI this will // cause it to hang until it times out, which can take several hours. if std::env::var_os("CI").is_some() { - llvm::LLVMRustDisableSystemDialogsOnCrash(); + unsafe { + llvm::LLVMRustDisableSystemDialogsOnCrash(); + } } fn llvm_arg_to_arg_name(full_arg: &str) -> &str { @@ -124,12 +128,12 @@ unsafe fn configure_llvm(sess: &Session) { } if sess.opts.unstable_opts.llvm_time_trace { - llvm::LLVMRustTimeTraceProfilerInitialize(); + unsafe { llvm::LLVMRustTimeTraceProfilerInitialize() }; } rustc_llvm::initialize_available_targets(); - llvm::LLVMRustSetLLVMOptions(llvm_args.len() as c_int, llvm_args.as_ptr()); + unsafe { llvm::LLVMRustSetLLVMOptions(llvm_args.len() as c_int, llvm_args.as_ptr()) }; } pub fn time_trace_profiler_finish(file_name: &Path) { @@ -442,8 +446,8 @@ pub(crate) fn print(req: &PrintRequest, mut out: &mut String, sess: &Session) { let cpu_cstring = CString::new(handle_native(sess.target.cpu.as_ref())) .unwrap_or_else(|e| bug!("failed to convert to cstring: {}", e)); unsafe extern "C" fn callback(out: *mut c_void, string: *const c_char, len: usize) { - let out = &mut *(out as *mut &mut String); - let bytes = slice::from_raw_parts(string as *const u8, len); + let out = unsafe { &mut *(out as *mut &mut String) }; + let bytes = unsafe { slice::from_raw_parts(string as *const u8, len) }; write!(out, "{}", String::from_utf8_lossy(bytes)).unwrap(); } unsafe { diff --git a/compiler/rustc_codegen_llvm/src/mono_item.rs b/compiler/rustc_codegen_llvm/src/mono_item.rs index a7df08421a31e..282a186be99ac 100644 --- a/compiler/rustc_codegen_llvm/src/mono_item.rs +++ b/compiler/rustc_codegen_llvm/src/mono_item.rs @@ -108,8 +108,8 @@ impl CodegenCx<'_, '_> { llval: &llvm::Value, is_declaration: bool, ) -> bool { - let linkage = llvm::LLVMRustGetLinkage(llval); - let visibility = llvm::LLVMRustGetVisibility(llval); + let linkage = unsafe { llvm::LLVMRustGetLinkage(llval) }; + let visibility = unsafe { llvm::LLVMRustGetVisibility(llval) }; if matches!(linkage, llvm::Linkage::InternalLinkage | llvm::Linkage::PrivateLinkage) { return true; @@ -145,8 +145,8 @@ impl CodegenCx<'_, '_> { } // Thread-local variables generally don't support copy relocations. - let is_thread_local_var = llvm::LLVMIsAGlobalVariable(llval) - .is_some_and(|v| llvm::LLVMIsThreadLocal(v) == llvm::True); + let is_thread_local_var = unsafe { llvm::LLVMIsAGlobalVariable(llval) } + .is_some_and(|v| unsafe { llvm::LLVMIsThreadLocal(v) } == llvm::True); if is_thread_local_var { return false; } diff --git a/compiler/rustc_codegen_ssa/src/back/lto.rs b/compiler/rustc_codegen_ssa/src/back/lto.rs index cb6244050df24..5291cad148e26 100644 --- a/compiler/rustc_codegen_ssa/src/back/lto.rs +++ b/compiler/rustc_codegen_ssa/src/back/lto.rs @@ -72,7 +72,7 @@ impl LtoModuleCodegen { B::optimize_fat(cgcx, &mut module)?; Ok(module) } - LtoModuleCodegen::Thin(thin) => B::optimize_thin(cgcx, thin), + LtoModuleCodegen::Thin(thin) => unsafe { B::optimize_thin(cgcx, thin) }, } } diff --git a/compiler/rustc_llvm/src/lib.rs b/compiler/rustc_llvm/src/lib.rs index e5366c9b51830..1365afbce1c37 100644 --- a/compiler/rustc_llvm/src/lib.rs +++ b/compiler/rustc_llvm/src/lib.rs @@ -33,7 +33,7 @@ pub unsafe extern "C" fn LLVMRustStringWriteImpl( ptr: *const c_char, size: size_t, ) { - let slice = slice::from_raw_parts(ptr as *const u8, size); + let slice = unsafe { slice::from_raw_parts(ptr as *const u8, size) }; sr.bytes.borrow_mut().extend_from_slice(slice); } diff --git a/compiler/rustc_middle/src/ty/context/tls.rs b/compiler/rustc_middle/src/ty/context/tls.rs index 5e256dc8d26e2..7b5ccae35682e 100644 --- a/compiler/rustc_middle/src/ty/context/tls.rs +++ b/compiler/rustc_middle/src/ty/context/tls.rs @@ -67,7 +67,7 @@ fn erase(context: &ImplicitCtxt<'_, '_>) -> *const () { #[inline] unsafe fn downcast<'a, 'tcx>(context: *const ()) -> &'a ImplicitCtxt<'a, 'tcx> { - &*(context as *const ImplicitCtxt<'a, 'tcx>) + unsafe { &*(context as *const ImplicitCtxt<'a, 'tcx>) } } /// Sets `context` as the new current `ImplicitCtxt` for the duration of the function `f`. diff --git a/compiler/rustc_span/src/analyze_source_file.rs b/compiler/rustc_span/src/analyze_source_file.rs index 80c5c3bf1b5a7..d9e1ebaf0bce0 100644 --- a/compiler/rustc_span/src/analyze_source_file.rs +++ b/compiler/rustc_span/src/analyze_source_file.rs @@ -89,13 +89,13 @@ cfg_match! { let ptr = src_bytes.as_ptr() as *const __m128i; // We don't know if the pointer is aligned to 16 bytes, so we // use `loadu`, which supports unaligned loading. - let chunk = _mm_loadu_si128(ptr.add(chunk_index)); + let chunk = unsafe { _mm_loadu_si128(ptr.add(chunk_index)) }; // For character in the chunk, see if its byte value is < 0, which // indicates that it's part of a UTF-8 char. - let multibyte_test = _mm_cmplt_epi8(chunk, _mm_set1_epi8(0)); + let multibyte_test = unsafe { _mm_cmplt_epi8(chunk, _mm_set1_epi8(0)) }; // Create a bit mask from the comparison results. - let multibyte_mask = _mm_movemask_epi8(multibyte_test); + let multibyte_mask = unsafe { _mm_movemask_epi8(multibyte_test) }; // If the bit mask is all zero, we only have ASCII chars here: if multibyte_mask == 0 { @@ -104,19 +104,19 @@ cfg_match! { // Check if there are any control characters in the chunk. All // control characters that we can encounter at this point have a // byte value less than 32 or ... - let control_char_test0 = _mm_cmplt_epi8(chunk, _mm_set1_epi8(32)); - let control_char_mask0 = _mm_movemask_epi8(control_char_test0); + let control_char_test0 = unsafe { _mm_cmplt_epi8(chunk, _mm_set1_epi8(32)) }; + let control_char_mask0 = unsafe { _mm_movemask_epi8(control_char_test0) }; // ... it's the ASCII 'DEL' character with a value of 127. - let control_char_test1 = _mm_cmpeq_epi8(chunk, _mm_set1_epi8(127)); - let control_char_mask1 = _mm_movemask_epi8(control_char_test1); + let control_char_test1 = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(127)) }; + let control_char_mask1 = unsafe { _mm_movemask_epi8(control_char_test1) }; let control_char_mask = control_char_mask0 | control_char_mask1; if control_char_mask != 0 { // Check for newlines in the chunk - let newlines_test = _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)); - let newlines_mask = _mm_movemask_epi8(newlines_test); + let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) }; + let newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) }; if control_char_mask == newlines_mask { // All control characters are newlines, record them diff --git a/src/bootstrap/src/core/builder.rs b/src/bootstrap/src/core/builder.rs index f033905e9f62c..604fd8e199088 100644 --- a/src/bootstrap/src/core/builder.rs +++ b/src/bootstrap/src/core/builder.rs @@ -2001,6 +2001,7 @@ impl<'a> Builder<'a> { // FIXME(edition_2024): Change this to `-Wrust_2024_idioms` when all // of the individual lints are satisfied. rustflags.arg("-Wkeyword_idents_2024"); + rustflags.arg("-Wunsafe_op_in_unsafe_fn"); } if self.config.rust_frame_pointers {