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Use "uintptr_t" for 64-bit targets

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On 64-bit targets, casting from pointer to unsigned can lose data.
Instead, cast to uintptr_t. This causes no code change on 32-bit
platforms, since the types have the same width, but preserves all bits
on systems where pointers are 64 bits.
This commit is contained in:
Jeff Epler
2025-02-10 08:26:09 -06:00
parent ea82911f4c
commit 6ecac2d0bc
1 changed files with 4 additions and 3 deletions
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7
tlsf.c
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@@ -7,6 +7,7 @@
#include <string.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include "tlsf.h"
#include "tlsf_common.h"
#include "tlsf_block_functions.h"
@@ -1036,11 +1037,11 @@ void* tlsf_malloc_addr(tlsf_t tlsf, size_t size, void *address)
control_t* control = tlsf_cast(control_t*, tlsf);
/* adjust the address to be ALIGN_SIZE bytes aligned. */
const unsigned int addr_adjusted = align_down(tlsf_cast(unsigned int, address), ALIGN_SIZE);
const uintptr_t addr_adjusted = align_down(tlsf_cast(uintptr_t, address), ALIGN_SIZE);
/* adjust the size to be ALIGN_SIZE bytes aligned. Add to the size the difference
* between the requested address and the address_adjusted. */
size_t size_adjusted = align_up(size + (tlsf_cast(unsigned int, address) - addr_adjusted), ALIGN_SIZE);
size_t size_adjusted = align_up(size + (tlsf_cast(uintptr_t, address) - addr_adjusted), ALIGN_SIZE);
/* find the free block that starts before the address in the pool and is big enough
* to support the size of allocation at the given address */
@@ -1080,7 +1081,7 @@ void* tlsf_malloc_addr(tlsf_t tlsf, size_t size, void *address)
/* trim any leading space or add the leading space to the overall requested size
* if the leading space is not big enough to store a block of minimum size */
const size_t space_before_addr_adjusted = addr_adjusted - tlsf_cast(unsigned int, block_to_ptr(block));
const size_t space_before_addr_adjusted = addr_adjusted - tlsf_cast(uintptr_t, block_to_ptr(block));
block_header_t *return_block = block;
if (space_before_addr_adjusted >= block_size_min) {
return_block = block_trim_free_leading(control, block, space_before_addr_adjusted);