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[XRAY] [compiler-rt] [NFC] Fixing the bit twiddling of Function Id in FDR logging mode. 

Summary:
Fixing a bug I found when testing a reader for the FDR format. Function ID is
now correctly packed into the 28 bits which are documented for it instead of being
masked to all ones.

Reviewers: dberris, pelikan, eugenis

Reviewed By: dberris

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D29698

llvm-svn: 294563
This commit is contained in:
Dean Michael Berris 2017-02-09 07:05:42 +00:00
parent 3cac763532
commit 860247b1bb
1 changed files with 1 additions and 1 deletions
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2
compiler-rt/lib/xray/xray_fdr_logging.cc
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@ -459,7 +459,7 @@ void fdrLoggingHandleArg0(int32_t FuncId,
FuncRecord.Type = RecordType::Function;
// Only get the lower 28 bits of the function id.
FuncRecord.FuncId = FuncId | ~(0x03 << 28);
FuncRecord.FuncId = FuncId & ~(0x0F << 28);
// Here we compute the TSC Delta. There are a few interesting situations we
// need to account for: