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InstrProf: Change magic number to have non-text characters 

Include non-text characters in the magic number so that text files can't
match.

<rdar://problem/15950346>

llvm-svn: 204513
This commit is contained in:
Duncan P. N. Exon Smith 2014-03-21 20:42:37 +00:00
parent 4c5b7cb1fc
commit 745a2bf0b8
3 changed files with 10 additions and 10 deletions
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16
llvm/lib/ProfileData/InstrProfReader.cpp
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@ -90,14 +90,14 @@ RawInstrProfReader::RawInstrProfReader(std::unique_ptr<MemoryBuffer> DataBuffer)
static uint64_t getRawMagic() {
return
uint64_t('l') << 56 |
uint64_t('p') << 48 |
uint64_t('r') << 40 |
uint64_t('o') << 32 |
uint64_t('f') << 24 |
uint64_t('r') << 16 |
uint64_t('a') << 8 |
uint64_t('w');
uint64_t(255) << 56 |
uint64_t('l') << 48 |
uint64_t('p') << 40 |
uint64_t('r') << 32 |
uint64_t('o') << 24 |
uint64_t('f') << 16 |
uint64_t('r') << 8 |
uint64_t(129);
}
bool RawInstrProfReader::hasFormat(const MemoryBuffer &DataBuffer) {

BIN
llvm/test/tools/llvm-profdata/Inputs/binary.profdata
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Binary file not shown.

4
llvm/test/tools/llvm-profdata/raw-magic-but-no-header.test
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@ -1,6 +1,6 @@
RUN: printf "warforpl" > %t
RUN: printf '\201rforpl\377' > %t
RUN: not llvm-profdata show %t 2>&1 | FileCheck %s
RUN: printf "lprofraw" > %t
RUN: printf '\377lprofr\201' > %t
RUN: not llvm-profdata show %t 2>&1 | FileCheck %s
CHECK: error: {{.+}}: Invalid header