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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/Module.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/Expression/ExpressionSourceCode.h"
#include "lldb/Expression/IRExecutionUnit.h"
#include "lldb/Host/Host.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Target.h"
using namespace lldb_private;
//------------------------------------------------------------------
/// 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_expr_decl_map (),
m_execution_unit_sp (),
m_jit_module_wp (),
m_function_text (ExpressionSourceCode::g_expression_prefix),
m_function_name (name)
{
if (text && text[0])
m_function_text.append (text);
}
ClangUtilityFunction::~ClangUtilityFunction ()
{
lldb::ProcessSP process_sp (m_jit_process_wp.lock());
if (process_sp)
{
lldb::ModuleSP jit_module_sp (m_jit_module_wp.lock());
if (jit_module_sp)
process_sp->GetTarget().GetImages().Remove(jit_module_sp);
}
}
//------------------------------------------------------------------
/// 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)
{
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));
if (!m_expr_decl_map->WillParse(exe_ctx, NULL))
{
error_stream.PutCString ("error: current process state is unsuitable for expression parsing\n");
return false;
}
const bool generate_debug_info = true;
ClangExpressionParser parser(exe_ctx.GetBestExecutionContextScope(), *this, generate_debug_info);
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
//
bool can_interpret = false; // should stay that way
Error jit_error = parser.PrepareForExecution (m_jit_start_addr,
m_jit_end_addr,
m_execution_unit_sp,
exe_ctx,
can_interpret,
eExecutionPolicyAlways);
if (m_jit_start_addr != LLDB_INVALID_ADDRESS)
{
m_jit_process_wp = process->shared_from_this();
if (parser.GetGenerateDebugInfo())
{
lldb::ModuleSP jit_module_sp ( m_execution_unit_sp->GetJITModule());
if (jit_module_sp)
{
ConstString const_func_name(FunctionName());
FileSpec jit_file;
jit_file.GetFilename() = const_func_name;
jit_module_sp->SetFileSpecAndObjectName (jit_file, ConstString());
m_jit_module_wp = jit_module_sp;
target->GetImages().Append(jit_module_sp);
}
}
}
#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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