diff options
Diffstat (limited to 'compiler/rustc_codegen_llvm/src')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/allocator.rs | 4 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/back/lto.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/back/write.rs | 16 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/base.rs | 6 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/builder.rs | 16 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/consts.rs | 7 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/context.rs | 44 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs | 3 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs | 9 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/debuginfo/mod.rs | 7 | ||||
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/lib.rs | 1 |
11 files changed, 63 insertions, 52 deletions
diff --git a/compiler/rustc_codegen_llvm/src/allocator.rs b/compiler/rustc_codegen_llvm/src/allocator.rs index ad0636894b7..a57508815d6 100644 --- a/compiler/rustc_codegen_llvm/src/allocator.rs +++ b/compiler/rustc_codegen_llvm/src/allocator.rs @@ -77,7 +77,7 @@ pub(crate) unsafe fn codegen( llvm::LLVMRustGetOrInsertFunction(llmod, callee.as_ptr().cast(), callee.len(), ty); llvm::LLVMRustSetVisibility(callee, llvm::Visibility::Hidden); - let llbb = llvm::LLVMAppendBasicBlockInContext(llcx, llfn, c"entry".as_ptr().cast()); + let llbb = llvm::LLVMAppendBasicBlockInContext(llcx, llfn, "entry\0".as_ptr().cast()); let llbuilder = llvm::LLVMCreateBuilderInContext(llcx); llvm::LLVMPositionBuilderAtEnd(llbuilder, llbb); @@ -129,7 +129,7 @@ pub(crate) unsafe fn codegen( attributes::apply_to_llfn(callee, llvm::AttributePlace::Function, &[no_return]); llvm::LLVMRustSetVisibility(callee, llvm::Visibility::Hidden); - let llbb = llvm::LLVMAppendBasicBlockInContext(llcx, llfn, c"entry".as_ptr().cast()); + let llbb = llvm::LLVMAppendBasicBlockInContext(llcx, llfn, "entry\0".as_ptr().cast()); let llbuilder = llvm::LLVMCreateBuilderInContext(llcx); llvm::LLVMPositionBuilderAtEnd(llbuilder, llbb); diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs index 94885b40cc1..d7dd98d7938 100644 --- a/compiler/rustc_codegen_llvm/src/back/lto.rs +++ b/compiler/rustc_codegen_llvm/src/back/lto.rs @@ -601,7 +601,7 @@ pub(crate) fn run_pass_manager( llvm::LLVMRustAddModuleFlag( module.module_llvm.llmod(), llvm::LLVMModFlagBehavior::Error, - c"LTOPostLink".as_ptr().cast(), + "LTOPostLink\0".as_ptr().cast(), 1, ); } diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs index 998e3b300da..0f5e975445f 100644 --- a/compiler/rustc_codegen_llvm/src/back/write.rs +++ b/compiler/rustc_codegen_llvm/src/back/write.rs @@ -931,16 +931,16 @@ unsafe fn embed_bitcode( let llglobal = llvm::LLVMAddGlobal( llmod, common::val_ty(llconst), - c"rustc.embedded.module".as_ptr().cast(), + "rustc.embedded.module\0".as_ptr().cast(), ); llvm::LLVMSetInitializer(llglobal, llconst); let section = if is_apple { - c"__LLVM,__bitcode" + "__LLVM,__bitcode\0" } else if is_aix { - c".ipa" + ".ipa\0" } else { - c".llvmbc" + ".llvmbc\0" }; llvm::LLVMSetSection(llglobal, section.as_ptr().cast()); llvm::LLVMRustSetLinkage(llglobal, llvm::Linkage::PrivateLinkage); @@ -950,15 +950,15 @@ unsafe fn embed_bitcode( let llglobal = llvm::LLVMAddGlobal( llmod, common::val_ty(llconst), - c"rustc.embedded.cmdline".as_ptr().cast(), + "rustc.embedded.cmdline\0".as_ptr().cast(), ); llvm::LLVMSetInitializer(llglobal, llconst); let section = if is_apple { - c"__LLVM,__cmdline" + "__LLVM,__cmdline\0" } else if is_aix { - c".info" + ".info\0" } else { - c".llvmcmd" + ".llvmcmd\0" }; llvm::LLVMSetSection(llglobal, section.as_ptr().cast()); llvm::LLVMRustSetLinkage(llglobal, llvm::Linkage::PrivateLinkage); diff --git a/compiler/rustc_codegen_llvm/src/base.rs b/compiler/rustc_codegen_llvm/src/base.rs index 2f7eb08ad3d..5b2bbdb4bde 100644 --- a/compiler/rustc_codegen_llvm/src/base.rs +++ b/compiler/rustc_codegen_llvm/src/base.rs @@ -19,6 +19,8 @@ use crate::context::CodegenCx; use crate::llvm; use crate::value::Value; +use cstr::cstr; + use rustc_codegen_ssa::base::maybe_create_entry_wrapper; use rustc_codegen_ssa::mono_item::MonoItemExt; use rustc_codegen_ssa::traits::*; @@ -108,11 +110,11 @@ pub fn compile_codegen_unit(tcx: TyCtxt<'_>, cgu_name: Symbol) -> (ModuleCodegen // Create the llvm.used and llvm.compiler.used variables. if !cx.used_statics.borrow().is_empty() { - cx.create_used_variable_impl(c"llvm.used", &*cx.used_statics.borrow()); + cx.create_used_variable_impl(cstr!("llvm.used"), &*cx.used_statics.borrow()); } if !cx.compiler_used_statics.borrow().is_empty() { cx.create_used_variable_impl( - c"llvm.compiler.used", + cstr!("llvm.compiler.used"), &*cx.compiler_used_statics.borrow(), ); } diff --git a/compiler/rustc_codegen_llvm/src/builder.rs b/compiler/rustc_codegen_llvm/src/builder.rs index 9863ca35202..d55992bf092 100644 --- a/compiler/rustc_codegen_llvm/src/builder.rs +++ b/compiler/rustc_codegen_llvm/src/builder.rs @@ -6,6 +6,7 @@ use crate::llvm::{self, AtomicOrdering, AtomicRmwBinOp, BasicBlock, False, True} use crate::type_::Type; use crate::type_of::LayoutLlvmExt; use crate::value::Value; +use cstr::cstr; use libc::{c_char, c_uint}; use rustc_codegen_ssa::common::{IntPredicate, RealPredicate, SynchronizationScope, TypeKind}; use rustc_codegen_ssa::mir::operand::{OperandRef, OperandValue}; @@ -25,6 +26,7 @@ use rustc_target::abi::{self, call::FnAbi, Align, Size, WrappingRange}; use rustc_target::spec::{HasTargetSpec, SanitizerSet, Target}; use smallvec::SmallVec; use std::borrow::Cow; +use std::ffi::CStr; use std::iter; use std::ops::Deref; use std::ptr; @@ -44,10 +46,13 @@ impl Drop for Builder<'_, '_, '_> { } } +// FIXME(eddyb) use a checked constructor when they become `const fn`. +const EMPTY_C_STR: &CStr = unsafe { CStr::from_bytes_with_nul_unchecked(b"\0") }; + /// Empty string, to be used where LLVM expects an instruction name, indicating /// that the instruction is to be left unnamed (i.e. numbered, in textual IR). // FIXME(eddyb) pass `&CStr` directly to FFI once it's a thin pointer. -const UNNAMED: *const c_char = c"".as_ptr(); +const UNNAMED: *const c_char = EMPTY_C_STR.as_ptr(); impl<'ll, 'tcx> BackendTypes for Builder<'_, 'll, 'tcx> { type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value; @@ -1002,13 +1007,14 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> { } fn cleanup_pad(&mut self, parent: Option<&'ll Value>, args: &[&'ll Value]) -> Funclet<'ll> { + let name = cstr!("cleanuppad"); let ret = unsafe { llvm::LLVMBuildCleanupPad( self.llbuilder, parent, args.as_ptr(), args.len() as c_uint, - c"cleanuppad".as_ptr(), + name.as_ptr(), ) }; Funclet::new(ret.expect("LLVM does not have support for cleanuppad")) @@ -1022,13 +1028,14 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> { } fn catch_pad(&mut self, parent: &'ll Value, args: &[&'ll Value]) -> Funclet<'ll> { + let name = cstr!("catchpad"); let ret = unsafe { llvm::LLVMBuildCatchPad( self.llbuilder, parent, args.as_ptr(), args.len() as c_uint, - c"catchpad".as_ptr(), + name.as_ptr(), ) }; Funclet::new(ret.expect("LLVM does not have support for catchpad")) @@ -1040,13 +1047,14 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> { unwind: Option<&'ll BasicBlock>, handlers: &[&'ll BasicBlock], ) -> &'ll Value { + let name = cstr!("catchswitch"); let ret = unsafe { llvm::LLVMBuildCatchSwitch( self.llbuilder, parent, unwind, handlers.len() as c_uint, - c"catchswitch".as_ptr(), + name.as_ptr(), ) }; let ret = ret.expect("LLVM does not have support for catchswitch"); diff --git a/compiler/rustc_codegen_llvm/src/consts.rs b/compiler/rustc_codegen_llvm/src/consts.rs index 2087754c66b..df52f50f86f 100644 --- a/compiler/rustc_codegen_llvm/src/consts.rs +++ b/compiler/rustc_codegen_llvm/src/consts.rs @@ -8,6 +8,7 @@ use crate::llvm::{self, True}; use crate::type_::Type; use crate::type_of::LayoutLlvmExt; use crate::value::Value; +use cstr::cstr; use rustc_codegen_ssa::traits::*; use rustc_hir::def_id::DefId; use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrFlags, CodegenFnAttrs}; @@ -481,9 +482,9 @@ impl<'ll> StaticMethods for CodegenCx<'ll, '_> { .all(|&byte| byte == 0); let sect_name = if all_bytes_are_zero { - c"__DATA,__thread_bss" + cstr!("__DATA,__thread_bss") } else { - c"__DATA,__thread_data" + cstr!("__DATA,__thread_data") }; llvm::LLVMSetSection(g, sect_name.as_ptr()); } @@ -512,7 +513,7 @@ impl<'ll> StaticMethods for CodegenCx<'ll, '_> { let val = llvm::LLVMMetadataAsValue(self.llcx, meta); llvm::LLVMAddNamedMetadataOperand( self.llmod, - c"wasm.custom_sections".as_ptr().cast(), + "wasm.custom_sections\0".as_ptr().cast(), val, ); } diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs index 287a22bc9a6..e1e0a442845 100644 --- a/compiler/rustc_codegen_llvm/src/context.rs +++ b/compiler/rustc_codegen_llvm/src/context.rs @@ -8,6 +8,7 @@ use crate::llvm_util; use crate::type_::Type; use crate::value::Value; +use cstr::cstr; use rustc_codegen_ssa::base::{wants_msvc_seh, wants_wasm_eh}; use rustc_codegen_ssa::traits::*; use rustc_data_structures::base_n; @@ -223,42 +224,36 @@ pub unsafe fn create_module<'ll>( // 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() { - llvm::LLVMRustAddModuleFlag( - llmod, - llvm::LLVMModFlagBehavior::Warning, - c"RtLibUseGOT".as_ptr().cast(), - 1, - ); + let avoid_plt = "RtLibUseGOT\0".as_ptr().cast(); + llvm::LLVMRustAddModuleFlag(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 = "CFI Canonical Jump Tables\0".as_ptr().cast(); llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Override, - c"CFI Canonical Jump Tables".as_ptr().cast(), + 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 = "EnableSplitLTOUnit\0".as_ptr().cast(); llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Override, - c"EnableSplitLTOUnit".as_ptr().cast(), + 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() { - llvm::LLVMRustAddModuleFlag( - llmod, - llvm::LLVMModFlagBehavior::Override, - c"kcfi".as_ptr().cast(), - 1, - ); + let kcfi = "kcfi\0".as_ptr().cast(); + llvm::LLVMRustAddModuleFlag(llmod, llvm::LLVMModFlagBehavior::Override, kcfi, 1); } // Control Flow Guard is currently only supported by the MSVC linker on Windows. @@ -270,7 +265,7 @@ pub unsafe fn create_module<'ll>( llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Warning, - c"cfguard".as_ptr() as *const _, + "cfguard\0".as_ptr() as *const _, 1, ) } @@ -279,7 +274,7 @@ pub unsafe fn create_module<'ll>( llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Warning, - c"cfguard".as_ptr() as *const _, + "cfguard\0".as_ptr() as *const _, 2, ) } @@ -297,26 +292,26 @@ pub unsafe fn create_module<'ll>( llvm::LLVMRustAddModuleFlag( llmod, behavior, - c"branch-target-enforcement".as_ptr().cast(), + "branch-target-enforcement\0".as_ptr().cast(), bti.into(), ); llvm::LLVMRustAddModuleFlag( llmod, behavior, - c"sign-return-address".as_ptr().cast(), + "sign-return-address\0".as_ptr().cast(), pac_ret.is_some().into(), ); let pac_opts = pac_ret.unwrap_or(PacRet { leaf: false, key: PAuthKey::A }); llvm::LLVMRustAddModuleFlag( llmod, behavior, - c"sign-return-address-all".as_ptr().cast(), + "sign-return-address-all\0".as_ptr().cast(), pac_opts.leaf.into(), ); llvm::LLVMRustAddModuleFlag( llmod, behavior, - c"sign-return-address-with-bkey".as_ptr().cast(), + "sign-return-address-with-bkey\0".as_ptr().cast(), u32::from(pac_opts.key == PAuthKey::B), ); } else { @@ -332,7 +327,7 @@ pub unsafe fn create_module<'ll>( llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Override, - c"cf-protection-branch".as_ptr().cast(), + "cf-protection-branch\0".as_ptr().cast(), 1, ) } @@ -340,7 +335,7 @@ pub unsafe fn create_module<'ll>( llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Override, - c"cf-protection-return".as_ptr().cast(), + "cf-protection-return\0".as_ptr().cast(), 1, ) } @@ -349,7 +344,7 @@ pub unsafe fn create_module<'ll>( llvm::LLVMRustAddModuleFlag( llmod, llvm::LLVMModFlagBehavior::Error, - c"Virtual Function Elim".as_ptr().cast(), + "Virtual Function Elim\0".as_ptr().cast(), 1, ); } @@ -481,13 +476,14 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> { } pub(crate) fn create_used_variable_impl(&self, name: &'static CStr, values: &[&'ll Value]) { + let section = cstr!("llvm.metadata"); let array = self.const_array(self.type_ptr_to(self.type_i8()), values); unsafe { let g = llvm::LLVMAddGlobal(self.llmod, self.val_ty(array), name.as_ptr()); llvm::LLVMSetInitializer(g, array); llvm::LLVMRustSetLinkage(g, llvm::Linkage::AppendingLinkage); - llvm::LLVMSetSection(g, c"llvm.metadata".as_ptr()); + llvm::LLVMSetSection(g, section.as_ptr()); } } } diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs b/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs index 8be54b7eb71..37f30917609 100644 --- a/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs +++ b/compiler/rustc_codegen_llvm/src/debuginfo/gdb.rs @@ -38,6 +38,7 @@ pub fn get_or_insert_gdb_debug_scripts_section_global<'ll>(cx: &CodegenCx<'ll, ' unsafe { llvm::LLVMGetNamedGlobal(cx.llmod, c_section_var_name.as_ptr().cast()) }; section_var.unwrap_or_else(|| { + let section_name = b".debug_gdb_scripts\0"; let mut section_contents = Vec::new(); // Add the pretty printers for the standard library first. @@ -70,7 +71,7 @@ pub fn get_or_insert_gdb_debug_scripts_section_global<'ll>(cx: &CodegenCx<'ll, ' let section_var = cx .define_global(section_var_name, llvm_type) .unwrap_or_else(|| bug!("symbol `{}` is already defined", section_var_name)); - llvm::LLVMSetSection(section_var, c".debug_gdb_scripts".as_ptr().cast()); + llvm::LLVMSetSection(section_var, section_name.as_ptr().cast()); llvm::LLVMSetInitializer(section_var, cx.const_bytes(section_contents)); llvm::LLVMSetGlobalConstant(section_var, llvm::True); llvm::LLVMSetUnnamedAddress(section_var, llvm::UnnamedAddr::Global); diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs index 4b88ab8a97a..ad07d637106 100644 --- a/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs +++ b/compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs @@ -20,6 +20,7 @@ use crate::llvm::debuginfo::{ }; use crate::value::Value; +use cstr::cstr; use rustc_codegen_ssa::debuginfo::type_names::cpp_like_debuginfo; use rustc_codegen_ssa::debuginfo::type_names::VTableNameKind; use rustc_codegen_ssa::traits::*; @@ -811,6 +812,7 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>( let name_in_debuginfo = name_in_debuginfo.to_string_lossy(); let work_dir = tcx.sess.opts.working_dir.to_string_lossy(FileNameDisplayPreference::Remapped); + let flags = "\0"; let output_filenames = tcx.output_filenames(()); let split_name = if tcx.sess.target_can_use_split_dwarf() { output_filenames @@ -847,7 +849,7 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>( producer.as_ptr().cast(), producer.len(), tcx.sess.opts.optimize != config::OptLevel::No, - c"".as_ptr().cast(), + flags.as_ptr().cast(), 0, // NB: this doesn't actually have any perceptible effect, it seems. LLVM will instead // put the path supplied to `MCSplitDwarfFile` into the debug info of the final @@ -876,7 +878,8 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>( ); let val = llvm::LLVMMetadataAsValue(debug_context.llcontext, gcov_metadata); - llvm::LLVMAddNamedMetadataOperand(debug_context.llmod, c"llvm.gcov".as_ptr(), val); + let llvm_gcov_ident = cstr!("llvm.gcov"); + llvm::LLVMAddNamedMetadataOperand(debug_context.llmod, llvm_gcov_ident.as_ptr(), val); } // Insert `llvm.ident` metadata on the wasm targets since that will @@ -889,7 +892,7 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>( ); llvm::LLVMAddNamedMetadataOperand( debug_context.llmod, - c"llvm.ident".as_ptr(), + cstr!("llvm.ident").as_ptr(), llvm::LLVMMDNodeInContext(debug_context.llcontext, &name_metadata, 1), ); } diff --git a/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs b/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs index c2f16cad3fc..0858f6b5f8e 100644 --- a/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs +++ b/compiler/rustc_codegen_llvm/src/debuginfo/mod.rs @@ -113,7 +113,7 @@ impl<'ll, 'tcx> CodegenUnitDebugContext<'ll, 'tcx> { llvm::LLVMRustAddModuleFlag( self.llmod, llvm::LLVMModFlagBehavior::Warning, - c"Dwarf Version".as_ptr().cast(), + "Dwarf Version\0".as_ptr().cast(), dwarf_version, ); } else { @@ -121,16 +121,17 @@ impl<'ll, 'tcx> CodegenUnitDebugContext<'ll, 'tcx> { llvm::LLVMRustAddModuleFlag( self.llmod, llvm::LLVMModFlagBehavior::Warning, - c"CodeView".as_ptr().cast(), + "CodeView\0".as_ptr().cast(), 1, ) } // Prevent bitcode readers from deleting the debug info. + let ptr = "Debug Info Version\0".as_ptr(); llvm::LLVMRustAddModuleFlag( self.llmod, llvm::LLVMModFlagBehavior::Warning, - c"Debug Info Version".as_ptr().cast(), + ptr.cast(), llvm::LLVMRustDebugMetadataVersion(), ); } diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs index 24968e00cc8..24ba28bbc82 100644 --- a/compiler/rustc_codegen_llvm/src/lib.rs +++ b/compiler/rustc_codegen_llvm/src/lib.rs @@ -11,7 +11,6 @@ #![feature(let_chains)] #![feature(never_type)] #![feature(impl_trait_in_assoc_type)] -#![feature(c_str_literals)] #![recursion_limit = "256"] #![allow(rustc::potential_query_instability)] #![deny(rustc::untranslatable_diagnostic)] |