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cc391a0a12
inferring the function signature. This works well where the ABI doesn't distinguish between variadic and fixed argument lists, but on arm64 the calling conventions differ. The default assumption works for fixed argument lists, but variadic functions require explicit prototypes to be called. By far the most common case where this is an issue is when attempting to use printf(). This change augments the default expression prefix to include a working variadic prototype for the function. <rdar://problem/19024779> llvm-svn: 226744
178 lines
7.5 KiB
C++
178 lines
7.5 KiB
C++
//===-- ExpressionSourceCode.cpp --------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Expression/ExpressionSourceCode.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Platform.h"
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#include "lldb/Target/Target.h"
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using namespace lldb_private;
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const char *
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ExpressionSourceCode::g_expression_prefix = R"(
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#undef NULL
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#undef Nil
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#undef nil
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#undef YES
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#undef NO
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#define NULL (__null)
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#define Nil (__null)
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#define nil (__null)
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#define YES ((BOOL)1)
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#define NO ((BOOL)0)
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typedef __INT8_TYPE__ int8_t;
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typedef __UINT8_TYPE__ uint8_t;
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typedef __INT16_TYPE__ int16_t;
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typedef __UINT16_TYPE__ uint16_t;
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typedef __INT32_TYPE__ int32_t;
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typedef __UINT32_TYPE__ uint32_t;
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typedef __INT64_TYPE__ int64_t;
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typedef __UINT64_TYPE__ uint64_t;
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typedef __INTPTR_TYPE__ intptr_t;
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typedef __UINTPTR_TYPE__ uintptr_t;
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typedef __SIZE_TYPE__ size_t;
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typedef __PTRDIFF_TYPE__ ptrdiff_t;
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typedef unsigned short unichar;
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extern "C"
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{
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int printf(const char * __restrict, ...);
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}
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)";
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bool ExpressionSourceCode::GetText (std::string &text, lldb::LanguageType wrapping_language, bool const_object, bool static_method, ExecutionContext &exe_ctx) const
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{
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const char *target_specific_defines = "typedef signed char BOOL;\n";
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static ConstString g_platform_ios_simulator ("PlatformiOSSimulator");
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if (Target *target = exe_ctx.GetTargetPtr())
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{
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if (target->GetArchitecture().GetMachine() == llvm::Triple::aarch64)
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{
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target_specific_defines = "typedef bool BOOL;\n";
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}
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if (target->GetArchitecture().GetMachine() == llvm::Triple::x86_64)
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{
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if (lldb::PlatformSP platform_sp = target->GetPlatform())
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{
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if (platform_sp->GetPluginName() == g_platform_ios_simulator)
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{
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target_specific_defines = "typedef bool BOOL;\n";
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}
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}
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}
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}
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if (m_wrap)
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{
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switch (wrapping_language)
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{
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default:
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return false;
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case lldb::eLanguageTypeC:
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case lldb::eLanguageTypeC_plus_plus:
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case lldb::eLanguageTypeObjC:
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break;
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}
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StreamString wrap_stream;
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switch (wrapping_language)
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{
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default:
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break;
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case lldb::eLanguageTypeC:
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wrap_stream.Printf("%s \n"
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"%s \n"
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"%s \n"
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"void \n"
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"%s(void *$__lldb_arg) \n"
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"{ \n"
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" %s; \n"
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"} \n",
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g_expression_prefix,
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target_specific_defines,
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m_prefix.c_str(),
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m_name.c_str(),
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m_body.c_str());
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break;
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case lldb::eLanguageTypeC_plus_plus:
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wrap_stream.Printf("%s \n"
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"%s \n"
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"%s \n"
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"void \n"
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"$__lldb_class::%s(void *$__lldb_arg) %s\n"
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"{ \n"
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" %s; \n"
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"} \n",
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g_expression_prefix,
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target_specific_defines,
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m_prefix.c_str(),
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m_name.c_str(),
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(const_object ? "const" : ""),
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m_body.c_str());
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break;
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case lldb::eLanguageTypeObjC:
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if (static_method)
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{
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wrap_stream.Printf("%s \n"
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"%s \n"
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"%s \n"
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"@interface $__lldb_objc_class ($__lldb_category) \n"
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"+(void)%s:(void *)$__lldb_arg; \n"
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"@end \n"
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"@implementation $__lldb_objc_class ($__lldb_category) \n"
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"+(void)%s:(void *)$__lldb_arg \n"
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"{ \n"
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" %s; \n"
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"} \n"
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"@end \n",
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g_expression_prefix,
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target_specific_defines,
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m_prefix.c_str(),
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m_name.c_str(),
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m_name.c_str(),
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m_body.c_str());
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}
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else
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{
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wrap_stream.Printf("%s \n"
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"%s \n"
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"%s \n"
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"@interface $__lldb_objc_class ($__lldb_category) \n"
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"-(void)%s:(void *)$__lldb_arg; \n"
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"@end \n"
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"@implementation $__lldb_objc_class ($__lldb_category) \n"
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"-(void)%s:(void *)$__lldb_arg \n"
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"{ \n"
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" %s; \n"
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"} \n"
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"@end \n",
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g_expression_prefix,
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target_specific_defines,
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m_prefix.c_str(),
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m_name.c_str(),
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m_name.c_str(),
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m_body.c_str());
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}
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break;
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}
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text = wrap_stream.GetString();
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}
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else
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{
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text.append(m_body);
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}
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return true;
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}
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