forked from OSchip/llvm-project
147 lines
4.4 KiB
C++
147 lines
4.4 KiB
C++
//===---- ExecutionUtils.cpp - Utilities for executing functions in lli ---===//
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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 "ExecutionUtils.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/FormatVariadic.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstdint>
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#include <vector>
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// Declarations follow the GDB JIT interface (version 1, 2009) and must match
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// those of the DYLD used for testing. See:
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//
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// llvm/lib/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.cpp
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// llvm/lib/ExecutionEngine/GDBRegistrationListener.cpp
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//
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typedef enum {
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JIT_NOACTION = 0,
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JIT_REGISTER_FN,
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JIT_UNREGISTER_FN
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} jit_actions_t;
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struct jit_code_entry {
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struct jit_code_entry *next_entry;
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struct jit_code_entry *prev_entry;
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const char *symfile_addr;
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uint64_t symfile_size;
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};
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struct jit_descriptor {
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uint32_t version;
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// This should be jit_actions_t, but we want to be specific about the
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// bit-width.
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uint32_t action_flag;
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struct jit_code_entry *relevant_entry;
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struct jit_code_entry *first_entry;
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};
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namespace llvm {
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template <typename... Ts> static void outsv(const char *Fmt, Ts &&...Vals) {
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outs() << formatv(Fmt, Vals...);
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}
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static const char *actionFlagToStr(uint32_t ActionFlag) {
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switch (ActionFlag) {
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case JIT_NOACTION:
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return "JIT_NOACTION";
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case JIT_REGISTER_FN:
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return "JIT_REGISTER_FN";
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case JIT_UNREGISTER_FN:
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return "JIT_UNREGISTER_FN";
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}
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return "<invalid action_flag>";
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}
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// Sample output:
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//
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// Reading __jit_debug_descriptor at 0x0000000000404048
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//
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// Version: 0
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// Action: JIT_REGISTER_FN
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//
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// Entry Symbol File Size Previous Entry
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// [ 0] 0x0000000000451290 0x0000000000002000 200 0x0000000000000000
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// [ 1] 0x0000000000451260 0x0000000000001000 100 0x0000000000451290
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// ...
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//
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static void dumpDebugDescriptor(void *Addr) {
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outsv("Reading __jit_debug_descriptor at {0}\n\n", Addr);
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jit_descriptor *Descriptor = reinterpret_cast<jit_descriptor *>(Addr);
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outsv("Version: {0}\n", Descriptor->version);
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outsv("Action: {0}\n\n", actionFlagToStr(Descriptor->action_flag));
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outsv("{0,11} {1,24} {2,15} {3,14}\n", "Entry", "Symbol File", "Size",
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"Previous Entry");
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unsigned Idx = 0;
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for (auto *Entry = Descriptor->first_entry; Entry; Entry = Entry->next_entry)
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outsv("[{0,2}] {1:X16} {2:X16} {3,8:D} {4}\n", Idx++, Entry,
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reinterpret_cast<const void *>(Entry->symfile_addr),
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Entry->symfile_size, Entry->prev_entry);
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}
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static LLIBuiltinFunctionGenerator *Generator = nullptr;
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static void dumpDebugObjects(void *Addr) {
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jit_descriptor *Descriptor = reinterpret_cast<jit_descriptor *>(Addr);
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for (auto *Entry = Descriptor->first_entry; Entry; Entry = Entry->next_entry)
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Generator->appendDebugObject(Entry->symfile_addr, Entry->symfile_size);
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}
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LLIBuiltinFunctionGenerator::LLIBuiltinFunctionGenerator(
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std::vector<BuiltinFunctionKind> Enabled, orc::MangleAndInterner &Mangle)
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: TestOut(nullptr) {
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Generator = this;
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for (BuiltinFunctionKind F : Enabled) {
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switch (F) {
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case BuiltinFunctionKind::DumpDebugDescriptor:
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expose(Mangle("__dump_jit_debug_descriptor"), &dumpDebugDescriptor);
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break;
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case BuiltinFunctionKind::DumpDebugObjects:
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expose(Mangle("__dump_jit_debug_objects"), &dumpDebugObjects);
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TestOut = createToolOutput();
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break;
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}
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}
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}
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Error LLIBuiltinFunctionGenerator::tryToGenerate(
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orc::LookupState &LS, orc::LookupKind K, orc::JITDylib &JD,
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orc::JITDylibLookupFlags JDLookupFlags,
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const orc::SymbolLookupSet &Symbols) {
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orc::SymbolMap NewSymbols;
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for (const auto &NameFlags : Symbols) {
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auto It = BuiltinFunctions.find(NameFlags.first);
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if (It != BuiltinFunctions.end())
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NewSymbols.insert(*It);
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}
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if (NewSymbols.empty())
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return Error::success();
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return JD.define(absoluteSymbols(std::move(NewSymbols)));
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}
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// static
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std::unique_ptr<ToolOutputFile>
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LLIBuiltinFunctionGenerator::createToolOutput() {
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std::error_code EC;
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auto TestOut = std::make_unique<ToolOutputFile>("-", EC, sys::fs::OF_None);
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if (EC) {
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errs() << "Error creating tool output file: " << EC.message() << '\n';
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exit(1);
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}
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return TestOut;
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}
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} // namespace llvm
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