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