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Separate Parser and Post-parser code C code #4138

Merged
merged 6 commits into from
Sep 11, 2023
Merged

Separate Parser and Post-parser code C code #4138

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582c629
Implementation of seperating parser and post parser C code
komaljai Aug 31, 2023
18bb2e2
Addressed comments
komaljai Sep 7, 2023
b6c654e
Merge branch 'main' of https://github.com/komaljai/p4c into parser_se…
komaljai Sep 7, 2023
e3286f8
Updated Testcases
komaljai Sep 7, 2023
8c6ffd5
Addressed comments and updated testcase
komaljai Sep 7, 2023
130c48d
Fix clang issues
komaljai Sep 7, 2023
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48 changes: 40 additions & 8 deletions backends/tc/backend.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,6 @@ bool Backend::process() {
}

bool Backend::ebpfCodeGen(P4::ReferenceMap *refMapEBPF, P4::TypeMap *typeMapEBPF) {
if (options.cFile.isNullOrEmpty()) return true;
target = new EBPF::KernelSamplesTarget(options.emitTraceMessages);
ebpfOption.xdp2tcMode = options.xdp2tcMode;
ebpfOption.exe_name = options.exe_name;
Expand Down Expand Up @@ -122,15 +121,48 @@ void Backend::serialize() const {
outstream->flush();
}
}
auto progName = options.file;
auto filename = progName.findlast('/');
if (filename) progName = filename;
progName = progName.exceptLast(3);
progName = progName.trim("/\t\n\r");
cstring parserFile = progName + "_parser.c";
cstring postParserFile = progName + "_post_parser.c";
cstring headerFile = progName + "_parser.h";
if (!options.cFile.isNullOrEmpty()) {
auto cstream = openFile(options.cFile, false);
if (cstream == nullptr) return;
if (ebpf_program == nullptr) return;
EBPF::CodeBuilder c(target);
ebpf_program->emit(&c);
*cstream << c.toString();
cstream->flush();
if (options.cFile.get(options.cFile.size() - 1) != '/') {
options.cFile = options.cFile + '/';
}
parserFile = options.cFile + parserFile;
postParserFile = options.cFile + postParserFile;
headerFile = options.cFile + headerFile;
}
auto cstream = openFile(postParserFile, false);
auto pstream = openFile(parserFile, false);
auto hstream = openFile(headerFile, false);
if (cstream == nullptr) {
::error("Unable to open File %1%", postParserFile);
return;
}
if (pstream == nullptr) {
::error("Unable to open File %1%", parserFile);
return;
}
if (hstream == nullptr) {
::error("Unable to open File %1%", headerFile);
return;
}
if (ebpf_program == nullptr) return;
EBPF::CodeBuilder c(target), p(target), h(target);
ebpf_program->emit(&c);
ebpf_program->emitParser(&p);
ebpf_program->emitHeader(&h);
*cstream << c.toString();
*pstream << p.toString();
*hstream << h.toString();
cstream->flush();
pstream->flush();
hstream->flush();
}

bool Backend::serializeIntrospectionJson(std::ostream &out) const {
Expand Down
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