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//===-- UtilityFunction.cpp -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <cstdio>
#include <sys/types.h>
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Expression/DiagnosticManager.h"
#include "lldb/Expression/FunctionCaller.h"
#include "lldb/Expression/IRExecutionUnit.h"
#include "lldb/Expression/UtilityFunction.h"
#include "lldb/Host/Host.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Stream.h"
using namespace lldb_private;
using namespace lldb;
char UtilityFunction::ID;
/// 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.
UtilityFunction::UtilityFunction(ExecutionContextScope &exe_scope,
std::string text, std::string name,
bool enable_debugging)
: Expression(exe_scope), m_execution_unit_sp(), m_jit_module_wp(),
m_function_text(std::move(text)), m_function_name(std::move(name)) {}
UtilityFunction::~UtilityFunction() {
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);
}
}
// FIXME: We should check that every time this is called it is called with the
// same return type & arguments...
FunctionCaller *UtilityFunction::MakeFunctionCaller(
const CompilerType &return_type, const ValueList &arg_value_list,
lldb::ThreadSP thread_to_use_sp, Status &error) {
if (m_caller_up)
return m_caller_up.get();
ProcessSP process_sp = m_jit_process_wp.lock();
if (!process_sp) {
error.SetErrorString("Can't make a function caller without a process.");
return nullptr;
}
// Since we might need to allocate memory and maybe call code to make
// the caller, we need to be stopped.
if (process_sp->GetState() != lldb::eStateStopped) {
error.SetErrorStringWithFormatv(
"Can't make a function caller while the process is {0}: the process "
"must be stopped to allocate memory.",
StateAsCString(process_sp->GetState()));
return nullptr;
}
Address impl_code_address;
impl_code_address.SetOffset(StartAddress());
std::string name(m_function_name);
name.append("-caller");
m_caller_up.reset(process_sp->GetTarget().GetFunctionCallerForLanguage(
Language(), return_type, impl_code_address, arg_value_list, name.c_str(),
error));
if (error.Fail()) {
return nullptr;
}
if (m_caller_up) {
DiagnosticManager diagnostics;
unsigned num_errors =
m_caller_up->CompileFunction(thread_to_use_sp, diagnostics);
if (num_errors) {
error.SetErrorStringWithFormat(
"Error compiling %s caller function: \"%s\".",
m_function_name.c_str(), diagnostics.GetString().c_str());
m_caller_up.reset();
return nullptr;
}
diagnostics.Clear();
ExecutionContext exe_ctx(process_sp);
if (!m_caller_up->WriteFunctionWrapper(exe_ctx, diagnostics)) {
error.SetErrorStringWithFormat(
"Error inserting caller function for %s: \"%s\".",
m_function_name.c_str(), diagnostics.GetString().c_str());
m_caller_up.reset();
return nullptr;
}
}
return m_caller_up.get();
}
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