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Cherry-pick UBSAN fix

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from 16872af889
This commit is contained in:
Andrew Noyes 2021-06-23 09:24:52 -07:00
parent af0f286e17
commit 0e9eabdb18
1 changed files with 3 additions and 2 deletions
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5
fdbclient/rapidjson/internal/stack.h
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@ -17,6 +17,7 @@
#include "../allocators.h"
#include "swap.h"
#include <cstddef>
#if defined(__clang__)
RAPIDJSON_DIAG_PUSH
@ -106,7 +107,7 @@ public:
template <typename T>
RAPIDJSON_FORCEINLINE void Reserve(size_t count = 1) {
// Expand the stack if needed
if (RAPIDJSON_UNLIKELY(stackTop_ + sizeof(T) * count > stackEnd_))
if (RAPIDJSON_UNLIKELY(static_cast<std::ptrdiff_t>(sizeof(T) * count) > (stackEnd_ - stackTop_)))
Expand<T>(count);
}
@ -118,7 +119,7 @@ public:
template <typename T>
RAPIDJSON_FORCEINLINE T* PushUnsafe(size_t count = 1) {
RAPIDJSON_ASSERT(stackTop_ + sizeof(T) * count <= stackEnd_);
RAPIDJSON_ASSERT(static_cast<std::ptrdiff_t>(sizeof(T) * count) <= (stackEnd_ - stackTop_));
T* ret = reinterpret_cast<T*>(stackTop_);
stackTop_ += sizeof(T) * count;
return ret;