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[sanitizer] NFC: add static_assert to confirm that we use optimal ByteMap type 

Summary: If bots work we can replace #ifs with template specialization by TwoLevelByteMapSize1.

Reviewers: eugenis

Subscribers: kubamracek, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D61200

llvm-svn: 359333
This commit is contained in:
Vitaly Buka 2019-04-26 18:22:47 +00:00
parent 27e01e675c
commit 85dcdae5e3
1 changed files with 7 additions and 3 deletions
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10
compiler-rt/lib/sanitizer_common/sanitizer_allocator_primary32.h
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@ -47,6 +47,10 @@ struct SizeClassAllocator32FlagMasks { // Bit masks.
template <class Params>
class SizeClassAllocator32 {
private:
static const u64 TwoLevelByteMapSize1 =
(Params::kSpaceSize >> Params::kRegionSizeLog) >> 12;
public:
using AddressSpaceView = typename Params::AddressSpaceView;
static const uptr kSpaceBeg = Params::kSpaceBeg;
@ -58,12 +62,12 @@ class SizeClassAllocator32 {
typedef typename Params::MapUnmapCallback MapUnmapCallback;
#if SANITIZER_WORDSIZE == 32
static_assert(TwoLevelByteMapSize1 <= 128, "FlatByteMap should be used");
using BM = FlatByteMap<(Params::kSpaceSize >> Params::kRegionSizeLog),
AddressSpaceView>;
#elif SANITIZER_WORDSIZE == 64
using BM =
TwoLevelByteMap<((Params::kSpaceSize >> Params::kRegionSizeLog) >> 12),
1 << 12, AddressSpaceView>;
static_assert(TwoLevelByteMapSize1 > 128, "TwoLevelByteMap should be used");
using BM = TwoLevelByteMap<TwoLevelByteMapSize1, 1 << 12, AddressSpaceView>;
#endif
static_assert((Params::kFlags & SizeClassAllocator32FlagMasks::kForTest) ||
is_same<BM, ByteMap>::value,