52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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#ifndef HELPERS_H
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#define HELPERS_H
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/* Common helpers for fuzzing */
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#include <functional>
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#include <string_view>
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#include <cstring>
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/* We use this to pad the fuzz */
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static inline const uint8_t *makePadded(const uint8_t *data, size_t size) {
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static int paddedLength = 512 * 1024;
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static char *padded = new char[128 + paddedLength + 128];
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/* Increase landing area if required */
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if (paddedLength < size) {
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delete [] padded;
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paddedLength = size;
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padded = new char [128 + paddedLength + 128];
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}
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memcpy(padded + 128, data, size);
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return (uint8_t *) padded + 128;
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}
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/* Splits the fuzz data in one or many chunks */
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static inline void makeChunked(const uint8_t *data, size_t size, std::function<void(const uint8_t *data, size_t size)> cb) {
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/* First byte determines chunk size; 0 is all that remains, 1-255 is small chunk */
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for (int i = 0; i < size; ) {
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unsigned int chunkSize = data[i++];
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if (!chunkSize) {
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chunkSize = size - i;
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} else {
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chunkSize = std::min<int>(chunkSize, size - i);
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}
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cb(data + i, chunkSize);
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i += chunkSize;
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}
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}
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/* Reads all bytes to trigger invalid reads */
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static inline void readBytes(std::string_view s) {
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volatile int sum = 0;
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for (int i = 0; i < s.size(); i++) {
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sum += s[i];
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}
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}
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#endif
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