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cleanup

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This commit is contained in:
Nguyen Anh Quynh 2015-09-04 09:20:13 +08:00
parent 2da46caef7
commit e54519c09f
1 changed files with 16 additions and 7 deletions
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23
uc.c
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@ -642,7 +642,8 @@ uc_err uc_mem_map(uch handle, uint64_t address, size_t size, uint32_t perms)
return UC_ERR_INVAL;
if ((uc->mapped_block_count & (MEM_BLOCK_INCR - 1)) == 0) { //time to grow
regions = (MemoryRegion**)realloc(uc->mapped_blocks, sizeof(MemoryRegion*) * (uc->mapped_block_count + MEM_BLOCK_INCR));
regions = (MemoryRegion**)realloc(uc->mapped_blocks,
sizeof(MemoryRegion*) * (uc->mapped_block_count + MEM_BLOCK_INCR));
if (regions == NULL) {
return UC_ERR_NOMEM;
}
@ -694,26 +695,30 @@ static bool split_region(uch handle, MemoryRegion *mr, uint64_t address,
size_t l_size, m_size, r_size;
chunk_end = address + size;
// if this region belongs to area [address, address+size],
// then there is no work to do.
if (address <= mr->addr && chunk_end >= mr->end)
return true;
if (size == 0)
//trivial case
// trivial case
return true;
if (address >= mr->end || chunk_end <= mr->addr)
//impossible case
// impossible case
return false;
backup = copy_region(handle, mr);
if (backup == NULL)
return false;
//save the essential information required for the split before mr gets deleted
// save the essential information required for the split before mr gets deleted
perms = mr->perms;
begin = mr->addr;
end = mr->end;
// unmap this region first, then do split it later
if (uc_mem_unmap(handle, mr->addr, int128_get64(mr->size)) != UC_ERR_OK)
goto error;
@ -724,13 +729,13 @@ static bool split_region(uch handle, MemoryRegion *mr, uint64_t address,
* case 3 |---size--|
*/
//adjust some things
// adjust some things
if (address < begin)
address = begin;
if (chunk_end > end)
chunk_end = end;
//compute sub region sizes
// compute sub region sizes
l_size = (size_t)(address - begin);
r_size = (size_t)(end - chunk_end);
m_size = (size_t)(chunk_end - address);
@ -745,19 +750,23 @@ static bool split_region(uch handle, MemoryRegion *mr, uint64_t address,
if (uc_mem_write(handle, begin, backup, l_size) != UC_ERR_OK)
goto error;
}
if (m_size > 0 && !do_delete) {
if (uc_mem_map(handle, address, m_size, perms) != UC_ERR_OK)
goto error;
if (uc_mem_write(handle, address, backup + l_size, m_size) != UC_ERR_OK)
goto error;
}
if (r_size > 0) {
if (uc_mem_map(handle, chunk_end, r_size, perms) != UC_ERR_OK)
goto error;
if (uc_mem_write(handle, chunk_end, backup + l_size + m_size, r_size) != UC_ERR_OK)
goto error;
}
return true;
error:
free(backup);
return false;
@ -852,7 +861,7 @@ uc_err uc_mem_unmap(uch handle, uint64_t address, size_t size)
len = MIN(size - count, mr->end - addr);
if (!split_region(handle, mr, addr, len, true))
return UC_ERR_NOMEM;
// if we can retieve the mapping, then no splitting took place
// if we can retrieve the mapping, then no splitting took place
// so unmap here
mr = memory_mapping(uc, addr);
if (mr != NULL)