1 //===-- UtilityFunction.cpp -------------------------------------*- C++ -*-===// 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 <stdio.h> 10 #if HAVE_SYS_TYPES_H 11 #include <sys/types.h> 12 #endif 13 14 15 #include "lldb/Core/Module.h" 16 #include "lldb/Core/StreamFile.h" 17 #include "lldb/Expression/DiagnosticManager.h" 18 #include "lldb/Expression/FunctionCaller.h" 19 #include "lldb/Expression/IRExecutionUnit.h" 20 #include "lldb/Expression/UtilityFunction.h" 21 #include "lldb/Host/Host.h" 22 #include "lldb/Target/ExecutionContext.h" 23 #include "lldb/Target/Process.h" 24 #include "lldb/Target/Target.h" 25 #include "lldb/Utility/ConstString.h" 26 #include "lldb/Utility/Log.h" 27 #include "lldb/Utility/Stream.h" 28 29 using namespace lldb_private; 30 using namespace lldb; 31 32 /// Constructor 33 /// 34 /// \param[in] text 35 /// The text of the function. Must be a full translation unit. 36 /// 37 /// \param[in] name 38 /// The name of the function, as used in the text. 39 UtilityFunction::UtilityFunction(ExecutionContextScope &exe_scope, 40 const char *text, const char *name, 41 ExpressionKind kind) 42 : Expression(exe_scope, kind), 43 m_execution_unit_sp(), m_jit_module_wp(), 44 m_function_text(), 45 m_function_name(name) {} 46 47 UtilityFunction::~UtilityFunction() { 48 lldb::ProcessSP process_sp(m_jit_process_wp.lock()); 49 if (process_sp) { 50 lldb::ModuleSP jit_module_sp(m_jit_module_wp.lock()); 51 if (jit_module_sp) 52 process_sp->GetTarget().GetImages().Remove(jit_module_sp); 53 } 54 } 55 56 // FIXME: We should check that every time this is called it is called with the 57 // same return type & arguments... 58 59 FunctionCaller *UtilityFunction::MakeFunctionCaller( 60 const CompilerType &return_type, const ValueList &arg_value_list, 61 lldb::ThreadSP thread_to_use_sp, Status &error) { 62 if (m_caller_up) 63 return m_caller_up.get(); 64 65 ProcessSP process_sp = m_jit_process_wp.lock(); 66 if (!process_sp) { 67 error.SetErrorString("Can't make a function caller without a process."); 68 return nullptr; 69 } 70 71 Address impl_code_address; 72 impl_code_address.SetOffset(StartAddress()); 73 std::string name(m_function_name); 74 name.append("-caller"); 75 76 m_caller_up.reset(process_sp->GetTarget().GetFunctionCallerForLanguage( 77 Language(), return_type, impl_code_address, arg_value_list, name.c_str(), 78 error)); 79 if (error.Fail()) { 80 81 return nullptr; 82 } 83 if (m_caller_up) { 84 DiagnosticManager diagnostics; 85 86 unsigned num_errors = 87 m_caller_up->CompileFunction(thread_to_use_sp, diagnostics); 88 if (num_errors) { 89 error.SetErrorStringWithFormat( 90 "Error compiling %s caller function: \"%s\".", 91 m_function_name.c_str(), diagnostics.GetString().c_str()); 92 m_caller_up.reset(); 93 return nullptr; 94 } 95 96 diagnostics.Clear(); 97 ExecutionContext exe_ctx(process_sp); 98 99 if (!m_caller_up->WriteFunctionWrapper(exe_ctx, diagnostics)) { 100 error.SetErrorStringWithFormat( 101 "Error inserting caller function for %s: \"%s\".", 102 m_function_name.c_str(), diagnostics.GetString().c_str()); 103 m_caller_up.reset(); 104 return nullptr; 105 } 106 } 107 return m_caller_up.get(); 108 } 109