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b7c6a2f101
As reported in https://github.com/ldc-developers/ldc/issues/3501#issuecomment-661551187.
Previously, LDC would simply override an existing TypeDescriptor global
with an equivalent definition if assertions were disabled.
Use different equivalent TypeDescriptors in this exotic case now, by
using proper mangling. [The linker can presumably still fold duplicates
via ICF.]
Ideally, these descriptors would be truly unique, but WinEH depends on
string comparisons to check for matching catch clauses, and currently
depends on TypeInfo_Class.name to generate these strings at runtime when
throwing an exception, see
19731a92a9/src/ldc/eh_msvc.d (L192-L211).
So if those names were fully qualified (`cd->toPrettyChars(*true*)`
during ClassInfo generation), we'd be fine, but that'd obviously be a
breaking change and diverge from upstream.
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
//===-- mangling.h --------------------------------------------------------===//
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//
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// LDC – the LLVM D compiler
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//
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// This file is distributed under the BSD-style LDC license. See the LICENSE
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// file for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Tries to centralize functionality for mangling of symbols.
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//
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//===----------------------------------------------------------------------===//
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#pragma once
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#include <string>
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#include "dmd/globals.h"
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class AggregateDeclaration;
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class ClassDeclaration;
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class FuncDeclaration;
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class Module;
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class VarDeclaration;
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/*
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* These functions return a symbol's LLVM mangle.
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* LLVM's codegen performs target-specific postprocessing of these LLVM mangles
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* (for the final object file mangles) unless the LLVM mangle starts with a 0x1
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* byte. The TargetABI gets a chance to tweak the LLVM mangle.
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*/
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std::string getIRMangledName(FuncDeclaration *fdecl, LINK link);
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std::string getIRMangledName(VarDeclaration *vd);
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std::string getIRMangledFuncName(std::string baseMangle, LINK link);
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std::string getIRMangledVarName(std::string baseMangle, LINK link);
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std::string getIRMangledAggregateName(AggregateDeclaration *aggrdecl,
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const char *suffix = nullptr);
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std::string getIRMangledInitSymbolName(AggregateDeclaration *aggrdecl);
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std::string getIRMangledVTableSymbolName(AggregateDeclaration *aggrdecl);
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std::string getIRMangledClassInfoSymbolName(AggregateDeclaration *aggrdecl);
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std::string getIRMangledInterfaceInfosSymbolName(ClassDeclaration *cd);
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std::string getIRMangledModuleInfoSymbolName(Module *module);
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std::string getIRMangledModuleRefSymbolName(const char *moduleMangle);
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