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//===-- ClangUserExpression.cpp -------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
#include <stdio.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
// C++ Includes
#include "lldb/Core/ConstString.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Expression/ClangExpressionDeclMap.h"
#include "lldb/Expression/ClangExpressionParser.h"
#include "lldb/Expression/ClangUtilityFunction.h"
#include "lldb/Host/Host.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Target.h"
using namespace lldb_private;
static const char *g_global_defines =
"#undef NULL \n"
"#undef Nil \n"
"#undef nil \n"
"#undef YES \n"
"#undef NO \n"
"#define NULL ((int)0) \n"
"#define Nil ((Class)0) \n"
"#define nil ((id)0) \n"
"#define YES ((BOOL)1) \n"
"#define NO ((BOOL)0) \n"
"typedef signed char BOOL; \n"
"typedef signed __INT8_TYPE__ int8_t;\n"
"typedef unsigned __INT8_TYPE__ uint8_t;\n"
"typedef signed __INT16_TYPE__ int16_t;\n"
"typedef unsigned __INT16_TYPE__ uint16_t;\n"
"typedef signed __INT32_TYPE__ int32_t;\n"
"typedef unsigned __INT32_TYPE__ uint32_t;\n"
"typedef signed __INT64_TYPE__ int64_t;\n"
"typedef unsigned __INT64_TYPE__ uint64_t;\n"
"typedef signed __INTPTR_TYPE__ intptr_t;\n"
"typedef unsigned __INTPTR_TYPE__ uintptr_t;\n"
"typedef __SIZE_TYPE__ size_t; \n"
"typedef __PTRDIFF_TYPE__ ptrdiff_t;\n"
"typedef unsigned short unichar;\n";
//------------------------------------------------------------------
/// Constructor
///
/// @param[in] text
/// The text of the function. Must be a full translation unit.
///
/// @param[in] name
/// The name of the function, as used in the text.
//------------------------------------------------------------------
ClangUtilityFunction::ClangUtilityFunction (const char *text,
const char *name) :
ClangExpression (),
m_function_text (g_global_defines),
m_function_name (name)
{
if (text && text[0])
m_function_text.append (text);
}
ClangUtilityFunction::~ClangUtilityFunction ()
{
}
//------------------------------------------------------------------
/// Install the utility function into a process
///
/// @param[in] error_stream
/// A stream to print parse errors and warnings to.
///
/// @param[in] exe_ctx
/// The execution context to install the utility function to.
///
/// @return
/// True on success (no errors); false otherwise.
//------------------------------------------------------------------
bool
ClangUtilityFunction::Install (Stream &error_stream,
ExecutionContext &exe_ctx)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (m_jit_start_addr != LLDB_INVALID_ADDRESS)
{
error_stream.PutCString("error: already installed\n");
return false;
}
////////////////////////////////////
// Set up the target and compiler
//
Target *target = exe_ctx.GetTargetPtr();
if (!target)
{
error_stream.PutCString ("error: invalid target\n");
return false;
}
Process *process = exe_ctx.GetProcessPtr();
if (!process)
{
error_stream.PutCString ("error: invalid process\n");
return false;
}
//////////////////////////
// Parse the expression
//
bool keep_result_in_memory = false;
m_expr_decl_map.reset(new ClangExpressionDeclMap(keep_result_in_memory, exe_ctx));
m_data_allocator.reset(new ProcessDataAllocator(*process));
if (!m_expr_decl_map->WillParse(exe_ctx))
{
error_stream.PutCString ("error: current process state is unsuitable for expression parsing\n");
return false;
}
ClangExpressionParser parser(exe_ctx.GetBestExecutionContextScope(), *this);
unsigned num_errors = parser.Parse (error_stream);
if (num_errors)
{
error_stream.Printf ("error: %d errors parsing expression\n", num_errors);
m_expr_decl_map.reset();
return false;
}
//////////////////////////////////
// JIT the output of the parser
//
lldb::ClangExpressionVariableSP const_result;
bool evaluated_statically = false; // should stay that way
Error jit_error = parser.PrepareForExecution (m_jit_alloc,
m_jit_start_addr,
m_jit_end_addr,
exe_ctx,
m_data_allocator.get(),
evaluated_statically,
const_result,
eExecutionPolicyAlways);
if (log)
{
StreamString dump_string;
m_data_allocator->Dump(dump_string);
log->Printf("Data buffer contents:\n%s", dump_string.GetString().c_str());
}
if (m_jit_start_addr != LLDB_INVALID_ADDRESS)
m_jit_process_wp = lldb::ProcessWP(process->shared_from_this());
#if 0
// jingham: look here
StreamFile logfile ("/tmp/exprs.txt", "a");
logfile.Printf ("0x%16.16" PRIx64 ": func = %s, source =\n%s\n",
m_jit_start_addr,
m_function_name.c_str(),
m_function_text.c_str());
#endif
m_expr_decl_map->DidParse();
m_expr_decl_map.reset();
if (jit_error.Success())
{
return true;
}
else
{
const char *error_cstr = jit_error.AsCString();
if (error_cstr && error_cstr[0])
error_stream.Printf ("error: %s\n", error_cstr);
else
error_stream.Printf ("error: expression can't be interpreted or run\n");
return false;
}
}
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