For a given entry in a call stack, this parses out the following: line, function name, function offset, source file name, source file line, module path, and module offset.
Additionally, this provides a code-generated libclusterfuzz port of the regular expressions used for stack minimization.
For an example of the minimization, instead of:
```json
[
"#0 0x56512a9c1418 in __sanitizer_print_stack_trace /b/s/w/ir/cache/builder/src/third_party/llvm/compiler-rt/lib/asan/asan_stack.cpp:86:3",
"#1 0x56512aaaa42d in fuzzer::PrintStackTrace() third_party/libFuzzer/src/FuzzerUtil.cpp:205:5",
"#2 0x56512aa6a85e in fuzzer::Fuzzer::CrashCallback() third_party/libFuzzer/src/FuzzerLoop.cpp:232:3",
"#3 0x56512aa6a7df in fuzzer::Fuzzer::StaticCrashSignalCallback() third_party/libFuzzer/src/FuzzerLoop.cpp:203:6",
"#4 0x56512aaab948 in fuzzer::CrashHandler(int, siginfo_t*, void*) third_party/libFuzzer/src/FuzzerUtilPosix.cpp:46:3",
"#5 0x7f1ee3f0188f (/lib/x86_64-linux-gnu/libpthread.so.0+0x1288f)",
"#6 0x56512a9e5aa1 in Json::OurReader::parse(char const*, char const*, Json::Value&, bool) third_party/jsoncpp/source/src/lib_json/json_reader.cpp:1062:10",
"#7 0x56512a9eedb4 in Json::OurCharReader::parse(char const*, char const*, Json::Value*, std::__Cr::basic_string<char, std::__Cr::char_traits<char>, std::__Cr::allocator<char> >*) third_party/jsoncpp/source/src/lib_json/json_reader.cpp:1899:23",
"#8 0x56512a9e03a3 in LLVMFuzzerTestOneInput third_party/jsoncpp/fuzzers/json_fuzzer.cc:39:24",
"#9 0x56512aa6d0cf in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) third_party/libFuzzer/src/FuzzerLoop.cpp:556:15",
"#10 0x56512aa3b7da in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) third_party/libFuzzer/src/FuzzerDriver.cpp:292:6",
"#11 0x56512aa4108a in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) third_party/libFuzzer/src/FuzzerDriver.cpp:774:9","#12 0x56512aa821ac in main third_party/libFuzzer/src/FuzzerMain.cpp:19:10",
"#13 0x7f1ee3361b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310",
]
```
The minimized call stack is:
```json
[
"Json::OurReader::parse(char const*, char const*, Json::Value&, bool)",
"Json::OurCharReader::parse(char const*, char const*, Json::Value*, std::__Cr::basic_string<char, std::__Cr::char_traits<char>, std::__Cr::allocator<char> >*)",
"json_fuzzer.cc"
]
```
This also provides a naïve function name list, which comes close to Clusterfuzz's function identification.
This would result in:
```json
[
"Json::OurReader::parse",
"Json::OurCharReader::parse",
"json_fuzzer.cc"
]
```
Lastly, for our `stack hash` functionality used by the crash reporting task, those now provide the ability to specify the number of frames to include when building the hash.
