1 //===-- UtilityFunction.cpp -----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <cstdio> 10 #include <sys/types.h> 11 12 #include "lldb/Core/Module.h" 13 #include "lldb/Core/StreamFile.h" 14 #include "lldb/Expression/DiagnosticManager.h" 15 #include "lldb/Expression/FunctionCaller.h" 16 #include "lldb/Expression/IRExecutionUnit.h" 17 #include "lldb/Expression/UtilityFunction.h" 18 #include "lldb/Host/Host.h" 19 #include "lldb/Target/ExecutionContext.h" 20 #include "lldb/Target/Process.h" 21 #include "lldb/Target/Target.h" 22 #include "lldb/Utility/ConstString.h" 23 #include "lldb/Utility/Log.h" 24 #include "lldb/Utility/Stream.h" 25 26 using namespace lldb_private; 27 using namespace lldb; 28 29 char UtilityFunction::ID; 30 31 /// Constructor 32 /// 33 /// \param[in] text 34 /// The text of the function. Must be a full translation unit. 35 /// 36 /// \param[in] name 37 /// The name of the function, as used in the text. 38 UtilityFunction::UtilityFunction(ExecutionContextScope &exe_scope, 39 std::string text, std::string name, 40 bool enable_debugging) 41 : Expression(exe_scope), m_execution_unit_sp(), m_jit_module_wp(), 42 m_function_text(std::move(text)), m_function_name(std::move(name)) {} 43 44 UtilityFunction::~UtilityFunction() { 45 lldb::ProcessSP process_sp(m_jit_process_wp.lock()); 46 if (process_sp) { 47 lldb::ModuleSP jit_module_sp(m_jit_module_wp.lock()); 48 if (jit_module_sp) 49 process_sp->GetTarget().GetImages().Remove(jit_module_sp); 50 } 51 } 52 53 // FIXME: We should check that every time this is called it is called with the 54 // same return type & arguments... 55 56 FunctionCaller *UtilityFunction::MakeFunctionCaller( 57 const CompilerType &return_type, const ValueList &arg_value_list, 58 lldb::ThreadSP thread_to_use_sp, Status &error) { 59 if (m_caller_up) 60 return m_caller_up.get(); 61 62 ProcessSP process_sp = m_jit_process_wp.lock(); 63 if (!process_sp) { 64 error.SetErrorString("Can't make a function caller without a process."); 65 return nullptr; 66 } 67 68 Address impl_code_address; 69 impl_code_address.SetOffset(StartAddress()); 70 std::string name(m_function_name); 71 name.append("-caller"); 72 73 m_caller_up.reset(process_sp->GetTarget().GetFunctionCallerForLanguage( 74 Language(), return_type, impl_code_address, arg_value_list, name.c_str(), 75 error)); 76 if (error.Fail()) { 77 78 return nullptr; 79 } 80 if (m_caller_up) { 81 DiagnosticManager diagnostics; 82 83 unsigned num_errors = 84 m_caller_up->CompileFunction(thread_to_use_sp, diagnostics); 85 if (num_errors) { 86 error.SetErrorStringWithFormat( 87 "Error compiling %s caller function: \"%s\".", 88 m_function_name.c_str(), diagnostics.GetString().c_str()); 89 m_caller_up.reset(); 90 return nullptr; 91 } 92 93 diagnostics.Clear(); 94 ExecutionContext exe_ctx(process_sp); 95 96 if (!m_caller_up->WriteFunctionWrapper(exe_ctx, diagnostics)) { 97 error.SetErrorStringWithFormat( 98 "Error inserting caller function for %s: \"%s\".", 99 m_function_name.c_str(), diagnostics.GetString().c_str()); 100 m_caller_up.reset(); 101 return nullptr; 102 } 103 } 104 return m_caller_up.get(); 105 } 106