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instrprofilingwriter
2019 May 16
2
How data is laid out in default.profraw when doing profiling?
...lem here.
Because of some reasons, users do not stub in the main function and after running elf file, they cannot get a default profraw. Now they want to construct a default profraw manually but don't know how data is laid out in `default profraw` file.
We found a struct ProfDataIOVec in InstrProfilingWriter.c in compiler-rt and followed this layout.
```
ProfDataIOVec IOVec[] = {
{&Header, sizeof(__llvm_profile_header), 1},
{DataBegin, sizeof(__llvm_profile_data), DataSize},
{CountersBegin, sizeof(uint64_t), CountersSize},
{SkipNameDataWrite ? NULL : NamesBegin, sizeof(u...