heap_safe.h

#ifndef HEAP_SAFE_H
#define HEAP_SAFE_H


#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <string>

#include "voipmonitor_define.h"


#define HEAPSAFE_ALLOC_RESERVE			20
#define HEAPSAFE_SAFE_ALLOC_RESERVE		4

#define HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK	"BMB"
#define HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK	"FMB"
#define HEAPSAFE_END_MEMORY_CONTROL_BLOCK	"EMB"

#define HEAPSAFE_COPY_BEGIN_MEMORY_CONTROL_BLOCK(stringInfo) { \
	stringInfo[0] = HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK[0]; \
	stringInfo[1] = HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK[1]; \
	stringInfo[2] = HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK[2]; }
#define HEAPSAFE_COPY_FREED_MEMORY_CONTROL_BLOCK(stringInfo) { \
	stringInfo[0] = HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK[0]; \
	stringInfo[1] = HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK[1]; \
	stringInfo[2] = HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK[2]; }
#define HEAPSAFE_COPY_END_MEMORY_CONTROL_BLOCK(stringInfo) { \
	stringInfo[0] = HEAPSAFE_END_MEMORY_CONTROL_BLOCK[0]; \
	stringInfo[1] = HEAPSAFE_END_MEMORY_CONTROL_BLOCK[1]; \
	stringInfo[2] = HEAPSAFE_END_MEMORY_CONTROL_BLOCK[2]; }

#define HEAPSAFE_CMP_BEGIN_MEMORY_CONTROL_BLOCK(stringInfo) \
	(stringInfo[0] == HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK[0] && \
	 stringInfo[1] == HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK[1] && \
	 stringInfo[2] == HEAPSAFE_BEGIN_MEMORY_CONTROL_BLOCK[2])
#define HEAPSAFE_CMP_FREED_MEMORY_CONTROL_BLOCK(stringInfo) \
	(stringInfo[0] == HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK[0] && \
	 stringInfo[1] == HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK[1] && \
	 stringInfo[2] == HEAPSAFE_FREED_MEMORY_CONTROL_BLOCK[2])
#define HEAPSAFE_CMP_END_MEMORY_CONTROL_BLOCK(stringInfo) \
	(stringInfo[0] == HEAPSAFE_END_MEMORY_CONTROL_BLOCK[0] && \
	 stringInfo[1] == HEAPSAFE_END_MEMORY_CONTROL_BLOCK[1] && \
	 stringInfo[2] == HEAPSAFE_END_MEMORY_CONTROL_BLOCK[2])

#define MCB_PLUS   (HeapSafeCheck & _HeapSafePlus)
#define MCB_STACK  (HeapSafeCheck & _HeapSafeStack)
#define SIZEOF_MCB (MCB_PLUS ? sizeof(sHeapSafeMemoryControlBlockPlus) : \
		    MCB_STACK ? sizeof(sHeapSafeMemoryControlBlockEx) : \
		    16 /*sizeof(sHeapSafeMemoryControlBlock)*/) // to optimize -Ox the offset must be aligned to 16 bytes
 

enum eHeapSafeErrors {
	_HeapSafeErrorNotEnoughMemory = 1 << 0,
	_HeapSafeErrorBeginEnd        = 1 << 1,
	_HeapSafeErrorFreed           = 1 << 2,
	_HeapSafeErrorInAllocFce      = 1 << 3,
	_HeapSafeErrorAllocReserve    = 1 << 4,
	_HeapSafeErrorFillFF          = 1 << 5,
	_HeapSafeErrorFillRand        = 1 << 6,
	_HeapSafeErrorInHeap          = 1 << 7,
	_HeapSafeSafeReserve          = 1 << 8,
	_HeapSafePlus                 = 1 << 9,
	_HeapSafeStack                = 1 << 10
};

struct sHeapSafeMemoryControlBlock {
	char stringInfo[3];
	u_int32_t length;
	u_int32_t memory_type;
};

struct sHeapSafeMemoryControlBlockPlus : public sHeapSafeMemoryControlBlock {
	void *block_addr;
	char memory_type1[20];
	u_int16_t memory_type2;
	u_int16_t check_sum;
};

struct sHeapSafeMemoryControlBlockEx : public sHeapSafeMemoryControlBlock {
	u_int32_t memory_type_other;
};

struct sMemoryStatQuickBlock {
	u_int32_t alloc_number;
	u_int32_t size;
};


void HeapSafeAllocError(int error);
void HeapSafeMemcpyError(const char *errorString, const char *file = NULL, unsigned int line = 0);
void HeapSafeMemsetError(const char *errorString, const char *file = NULL, unsigned int line = 0);


inline void *memcpy_heapsafe(void *destination, const void *destination_begin, const void *source, const void *source_begin, size_t length,
			     const char *file = NULL, unsigned int line = 0) {
	#if HEAPSAFE
	extern unsigned int HeapSafeCheck;
	if(HeapSafeCheck & _HeapSafeErrorBeginEnd) {
		bool error = false;
		sHeapSafeMemoryControlBlock *destination_beginMemoryBlock;
		u_int32_t destinationLength = 0;
		if(destination_begin) {
			destination_beginMemoryBlock = (sHeapSafeMemoryControlBlock*)((unsigned char*)destination_begin - SIZEOF_MCB);
			if(HEAPSAFE_CMP_BEGIN_MEMORY_CONTROL_BLOCK(destination_beginMemoryBlock->stringInfo)) {
				destinationLength = destination_beginMemoryBlock->length;
			} else {
				error = true;
				HeapSafeMemcpyError("destination corrupted (bad begin memory block)", file, line);
			}
		}
		sHeapSafeMemoryControlBlock *source_beginMemoryBlock;
		u_int32_t sourceLength = 0;
		if(source_begin) {
			source_beginMemoryBlock = (sHeapSafeMemoryControlBlock*)((unsigned char*)source_begin - SIZEOF_MCB);
			if(HEAPSAFE_CMP_BEGIN_MEMORY_CONTROL_BLOCK(source_beginMemoryBlock->stringInfo)) {
				sourceLength = source_beginMemoryBlock->length;
			} else {
				error = true;
				HeapSafeMemcpyError("source corrupted (bad begin memory block)", file, line);
			}
		}
		if(!error) {
			if(destination_begin) {
				if((unsigned char*)destination < (unsigned char*)destination_begin) {
					HeapSafeMemcpyError("negative offset of destination", file, line);
				}
				if((unsigned char*)destination - (unsigned char*)destination_begin + length > destinationLength) {
					HeapSafeMemcpyError("write after destination length", file, line);
				}
			}
			if(source_begin) {
				if((unsigned char*)source < (unsigned char*)source_begin) {
					HeapSafeMemcpyError("negative offset of source", file, line);
				}
				if((unsigned char*)source - (unsigned char*)source_begin + length > sourceLength) {
					HeapSafeMemcpyError("write after source length", file, line);
				}
			}
		}
	}
	#endif
	return(memcpy(destination, source, length));
}

inline void *memcpy_heapsafe(void *destination, const void *source, size_t length,
			     const char *file = NULL, unsigned int line = 0) {
	return(memcpy_heapsafe(destination, destination, source, source, length,
			       file, line));
}

inline void *memset_heapsafe(void *ptr, void *ptr_begin, int value, size_t length,
			     const char *file = NULL, unsigned int line = 0) {
	#if HEAPSAFE
	extern unsigned int HeapSafeCheck;
	if(HeapSafeCheck & _HeapSafeErrorBeginEnd) {
		bool error = false;
		sHeapSafeMemoryControlBlock *ptr_beginMemoryBlock;
		u_int32_t ptrLength = 0;
		if(ptr_begin) {
			ptr_beginMemoryBlock = (sHeapSafeMemoryControlBlock*)((unsigned char*)ptr_begin - SIZEOF_MCB);
			if(HEAPSAFE_CMP_BEGIN_MEMORY_CONTROL_BLOCK(ptr_beginMemoryBlock->stringInfo)) {
				ptrLength = ptr_beginMemoryBlock->length;
			} else {
				error = true;
				HeapSafeMemsetError("ptr corrupted (bad begin memory block)", file, line);
			}
		}
		if(!error) {
			if(ptr_begin) {
				if((unsigned char*)ptr < (unsigned char*)ptr_begin) {
					HeapSafeMemsetError("negative offset of ptr", file, line);
				}
				if((unsigned char*)ptr - (unsigned char*)ptr_begin + length > ptrLength) {
					HeapSafeMemsetError("write after ptr length", file, line);
				}
			}
		}
	}
	#endif
	return(memset(ptr, value, length));
}

inline void *memset_heapsafe(void *ptr, int value, size_t length,
			     const char *file = NULL, unsigned int line = 0) {
	return(memset_heapsafe(ptr, ptr, value, length,
			       file, line));
}


std::string getMemoryStat(bool all = false);
std::string getMemoryStatQuick(bool all = false);
std::string addThousandSeparators(u_int64_t num);
void printMemoryStat(bool all = false);
void memoryStatInit();


#if HEAPSAFE
	#define FILE_LINE(alloc_number) (__FILE__, __LINE__, alloc_number)
	void * operator new(size_t sizeOfObject, const char *memory_type1, int memory_type2 = 0, int alloc_number = 0);
	void * operator new[](size_t sizeOfObject, const char *memory_type1, int memory_type2 = 0, int alloc_number = 0);
	void delete_object(void *pointerToObject);
	void *realloc_object(void *pointerToObject, size_t sizeOfObject, const char *memory_type1, int memory_type2, int alloc_number);
#else
	#define FILE_LINE(alloc_number)
#endif


struct sFileLine {
	char file[1000];
	unsigned line;
	unsigned alloc_number;
};


void parse_heapsafeplus_coredump(const char *corefile, const char *outfile);


#endif //HEAP_SAFE_H