Fixes for zero-sized allocation #1045
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isaachier
commented
Jun 3, 2018
| } | ||
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| assert(!struct_type->data.structure.zero_bits_loop_flag); | ||
| assert(struct_type->data.structure.fields); |
| assert(decl_node->type == NodeTypeContainerDecl); | ||
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| size_t field_count = struct_type->data.structure.src_field_count; | ||
| assert(struct_type->data.structure.fields != nullptr || field_count == 0); |
| struct_type->di_type = replacement_di_type; | ||
| return; | ||
| } | ||
| assert(struct_type->di_type); |
| return; | ||
| } | ||
| assert(struct_type->di_type); | ||
| assert(struct_type->di_type != nullptr || field_count == 0); |
| // if you hit this assert then probably this type or a related type didn't | ||
| // get ensure_complete_type called on it before using it with something that | ||
| // requires a complete type | ||
| assert(LLVMStoreSizeOfType(g->target_data_ref, struct_type->type_ref) > 0); |
| // get ensure_complete_type called on it before using it with something that | ||
| // requires a complete type | ||
| assert(LLVMStoreSizeOfType(g->target_data_ref, struct_type->type_ref) > 0); | ||
| assert(LLVMStoreSizeOfType(g->target_data_ref, struct_type->type_ref) > 0 || |
| 128, | ||
| }; | ||
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| struct CIntTypeInfo { |
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Padding fix discussed in #993.
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| template<typename T> | ||
| ATTRIBUTE_RETURNS_NOALIAS static inline T *allocate(size_t count) { | ||
| if (count == 0) { |
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Makes behavior for zero sized allocation portable.
| T *ptr = reinterpret_cast<T*>(realloc(old, new_count * sizeof(T))); | ||
| if (!ptr) | ||
| zig_panic("allocation failed"); | ||
| static inline T *reallocate(T *old, size_t old_count, size_t new_count) { |
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Implement reallocate using reallocate_nonzero to avoid code duplication.
| errors[error_entry->value] = error_entry; | ||
| } | ||
| ZigList<ErrorTableEntry *> intersection_list = {}; | ||
| ZigList<ErrorTableEntry *> intersection_list = {0}; |
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You will see this in a few places. ZigList needs to be initialized in order to guarantee the members are zeroed.
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Can you cite a source showing that {0} is necessary and {} is not sufficient?
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Actually you are right: https://stackoverflow.com/a/1069634/1930331. Maybe I'm thinking about C, but C++ will work.
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See #1044.