/*
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* Copyright (c) 2017 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace ebpf {
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class SourceDebugger {
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public:
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SourceDebugger(
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llvm::Module *mod,
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std::map<std::string, std::tuple<uint8_t *, uintptr_t>> §ions,
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const std::string &fn_prefix, const std::string &mod_src,
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std::map<std::string, std::string> &src_dbg_fmap)
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: mod_(mod),
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sections_(sections),
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fn_prefix_(fn_prefix),
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mod_src_(mod_src),
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src_dbg_fmap_(src_dbg_fmap) {}
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// Only support dump for llvm 6.x and later.
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//
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// The llvm 5.x, but not earlier versions, also supports create
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// a dwarf context for source debugging based
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// on a set of in-memory sections with slightly different interfaces.
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// FIXME: possibly to support 5.x
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//
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#if LLVM_MAJOR_VERSION >= 6
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void dump();
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private:
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void adjustInstSize(uint64_t &Size, uint8_t byte0, uint8_t byte1);
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std::vector<std::string> buildLineCache();
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void dumpSrcLine(const std::vector<std::string> &LineCache,
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const std::string &FileName, uint32_t Line,
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uint32_t &CurrentSrcLine, llvm::raw_ostream &os);
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void getDebugSections(
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llvm::StringMap<std::unique_ptr<llvm::MemoryBuffer>> &DebugSections);
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#else
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void dump() {
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}
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#endif
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private:
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llvm::Module *mod_;
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const std::map<std::string, std::tuple<uint8_t *, uintptr_t>> §ions_;
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const std::string &fn_prefix_;
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const std::string &mod_src_;
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std::map<std::string, std::string> &src_dbg_fmap_;
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};
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} // namespace ebpf
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