975eca0e6a
that separates out language and version. To avoid reinventing the wheel and introducing subtle incompatibilities, this API uses the table of languages and versiond defined by the upcoming DWARF 6 standard (https://dwarfstd.org/languages-v6.html). While the DWARF 6 spec is not finialized, the list of languages is broadly considered stable. The primary motivation for this is to allow the Swift language plugin to switch between language dialects between, e.g., Swift 5.9 and 6.0 with out introducing a ton of new language codes. On the main branch this change is considered NFC. Depends on https://github.com/llvm/llvm-project/pull/89980
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
//===-- UtilityFunction.cpp -----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <cstdio>
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#include <sys/types.h>
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#include "lldb/Core/Module.h"
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#include "lldb/Expression/DiagnosticManager.h"
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#include "lldb/Expression/FunctionCaller.h"
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#include "lldb/Expression/IRExecutionUnit.h"
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#include "lldb/Expression/UtilityFunction.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/ConstString.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/State.h"
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#include "lldb/Utility/Stream.h"
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using namespace lldb_private;
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using namespace lldb;
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char UtilityFunction::ID;
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/// Constructor
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///
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/// \param[in] text
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/// The text of the function. Must be a full translation unit.
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///
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/// \param[in] name
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/// The name of the function, as used in the text.
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UtilityFunction::UtilityFunction(ExecutionContextScope &exe_scope,
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std::string text, std::string name,
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bool enable_debugging)
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: Expression(exe_scope), m_execution_unit_sp(), m_jit_module_wp(),
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m_function_text(std::move(text)), m_function_name(std::move(name)) {}
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UtilityFunction::~UtilityFunction() {
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lldb::ProcessSP process_sp(m_jit_process_wp.lock());
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if (process_sp) {
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lldb::ModuleSP jit_module_sp(m_jit_module_wp.lock());
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if (jit_module_sp)
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process_sp->GetTarget().GetImages().Remove(jit_module_sp);
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}
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}
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// FIXME: We should check that every time this is called it is called with the
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// same return type & arguments...
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FunctionCaller *UtilityFunction::MakeFunctionCaller(
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const CompilerType &return_type, const ValueList &arg_value_list,
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lldb::ThreadSP thread_to_use_sp, Status &error) {
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if (m_caller_up)
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return m_caller_up.get();
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ProcessSP process_sp = m_jit_process_wp.lock();
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if (!process_sp) {
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error.SetErrorString("Can't make a function caller without a process.");
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return nullptr;
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}
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// Since we might need to allocate memory and maybe call code to make
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// the caller, we need to be stopped.
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if (process_sp->GetState() != lldb::eStateStopped) {
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error.SetErrorStringWithFormatv(
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"Can't make a function caller while the process is {0}: the process "
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"must be stopped to allocate memory.",
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StateAsCString(process_sp->GetState()));
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return nullptr;
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}
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Address impl_code_address;
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impl_code_address.SetOffset(StartAddress());
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std::string name(m_function_name);
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name.append("-caller");
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m_caller_up.reset(process_sp->GetTarget().GetFunctionCallerForLanguage(
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Language().AsLanguageType(), return_type, impl_code_address,
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arg_value_list, name.c_str(), error));
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if (error.Fail()) {
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return nullptr;
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}
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if (m_caller_up) {
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DiagnosticManager diagnostics;
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unsigned num_errors =
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m_caller_up->CompileFunction(thread_to_use_sp, diagnostics);
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if (num_errors) {
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error.SetErrorStringWithFormat(
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"Error compiling %s caller function: \"%s\".",
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m_function_name.c_str(), diagnostics.GetString().c_str());
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m_caller_up.reset();
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return nullptr;
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}
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diagnostics.Clear();
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ExecutionContext exe_ctx(process_sp);
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if (!m_caller_up->WriteFunctionWrapper(exe_ctx, diagnostics)) {
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error.SetErrorStringWithFormat(
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"Error inserting caller function for %s: \"%s\".",
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m_function_name.c_str(), diagnostics.GetString().c_str());
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m_caller_up.reset();
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return nullptr;
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}
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}
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return m_caller_up.get();
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}
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