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b60f71f227
As a follow up of the bad alloc handler patch, this patch introduces nullptr checks on pointers returned from the malloc/realloc/calloc functions. In addition some memory size assignments are moved behind the allocation of the corresponding memory to fulfill exception safe memory management (RAII). patch by Klaus Kretzschmar Differential Revision: https://reviews.llvm.org/D35414 llvm-svn: 308576
45 lines
1.7 KiB
C++
45 lines
1.7 KiB
C++
//===- llvm/ADT/SmallVector.cpp - 'Normally small' vectors ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the SmallVector class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/SmallVector.h"
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using namespace llvm;
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/// grow_pod - This is an implementation of the grow() method which only works
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/// on POD-like datatypes and is out of line to reduce code duplication.
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void SmallVectorBase::grow_pod(void *FirstEl, size_t MinSizeInBytes,
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size_t TSize) {
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size_t CurSizeBytes = size_in_bytes();
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size_t NewCapacityInBytes = 2 * capacity_in_bytes() + TSize; // Always grow.
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if (NewCapacityInBytes < MinSizeInBytes)
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NewCapacityInBytes = MinSizeInBytes;
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void *NewElts;
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if (BeginX == FirstEl) {
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NewElts = malloc(NewCapacityInBytes);
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if (NewElts == nullptr)
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report_bad_alloc_error("Allocation of SmallVector element failed.");
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// Copy the elements over. No need to run dtors on PODs.
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memcpy(NewElts, this->BeginX, CurSizeBytes);
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} else {
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// If this wasn't grown from the inline copy, grow the allocated space.
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NewElts = realloc(this->BeginX, NewCapacityInBytes);
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if (NewElts == nullptr)
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report_bad_alloc_error("Reallocation of SmallVector element failed.");
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}
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this->EndX = (char*)NewElts+CurSizeBytes;
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this->BeginX = NewElts;
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this->CapacityX = (char*)this->BeginX + NewCapacityInBytes;
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}
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