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Update llvm-objdump’s Mach-O symbolizer code to demangle C++ names.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220833 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kevin Enderby
2014-10-28 23:39:46 +00:00
parent 29773db30d
commit 17380c7afa
3 changed files with 44 additions and 6 deletions
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47
tools/llvm-objdump/MachODump.cpp
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@@ -16,6 +16,7 @@
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Config/config.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
@@ -43,6 +44,11 @@
#include <algorithm>
#include <cstring>
#include <system_error>
#if HAVE_CXXABI_H
#include <cxxabi.h>
#endif
using namespace llvm;
using namespace object;
@@ -249,6 +255,7 @@ struct DisassembleInfo {
const char *class_name;
const char *selector_name;
char *method;
char *demangled_name;
BindTable *bindtable;
};
@@ -1045,9 +1052,11 @@ const char *GuessLiteralPointer(uint64_t ReferenceValue, uint64_t ReferencePC,
// Out type and the ReferenceName will also be set which is added as a comment
// to the disassembled instruction.
//
// TODO: If the symbol name is a C++ mangled name then the demangled name is
#if HAVE_CXXABI_H
// If the symbol name is a C++ mangled name then the demangled name is
// returned through ReferenceName and ReferenceType is set to
// LLVMDisassembler_ReferenceType_DeMangled_Name .
#endif
//
// When this is called to get a symbol name for a branch target then the
// ReferenceType will be LLVMDisassembler_ReferenceType_In_Branch and then
@@ -1083,13 +1092,25 @@ const char *SymbolizerSymbolLookUp(void *DisInfo, uint64_t ReferenceValue,
if (*ReferenceType == LLVMDisassembler_ReferenceType_In_Branch) {
*ReferenceName = GuessIndirectSymbol(ReferenceValue, info);
if (*ReferenceName) {
if (*ReferenceName != nullptr) {
method_reference(info, ReferenceType, ReferenceName);
if (*ReferenceType != LLVMDisassembler_ReferenceType_Out_Objc_Message)
*ReferenceType = LLVMDisassembler_ReferenceType_Out_SymbolStub;
} else
// TODO: if SymbolName is not nullptr see if it is a C++ name
// and demangle it.
#if HAVE_CXXABI_H
if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) {
if (info->demangled_name != nullptr)
free(info->demangled_name);
int status;
info->demangled_name = abi::__cxa_demangle(SymbolName + 1, nullptr,
nullptr, &status);
if (info->demangled_name != nullptr) {
*ReferenceName = info->demangled_name;
*ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name;
} else
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
} else
#endif
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
} else if (*ReferenceType == LLVMDisassembler_ReferenceType_In_PCrel_Load) {
*ReferenceName =
@@ -1099,8 +1120,19 @@ const char *SymbolizerSymbolLookUp(void *DisInfo, uint64_t ReferenceValue,
else
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
}
// TODO: if SymbolName is not nullptr see if it is a C++ name
// and demangle it.
#if HAVE_CXXABI_H
else if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) {
if (info->demangled_name != nullptr)
free(info->demangled_name);
int status;
info->demangled_name = abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr,
&status);
if (info->demangled_name != nullptr) {
*ReferenceName = info->demangled_name;
*ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name;
}
}
#endif
else {
*ReferenceName = nullptr;
*ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
@@ -1392,6 +1424,7 @@ static void DisassembleInputMachO2(StringRef Filename,
SymbolizerInfo.class_name = nullptr;
SymbolizerInfo.selector_name = nullptr;
SymbolizerInfo.method = nullptr;
SymbolizerInfo.demangled_name = nullptr;
SymbolizerInfo.bindtable = nullptr;
// Disassemble symbol by symbol.
@@ -1569,6 +1602,8 @@ static void DisassembleInputMachO2(StringRef Filename,
}
if (SymbolizerInfo.method != nullptr)
free(SymbolizerInfo.method);
if (SymbolizerInfo.demangled_name != nullptr)
free(SymbolizerInfo.demangled_name);
if (SymbolizerInfo.bindtable != nullptr)
delete SymbolizerInfo.bindtable;
}