Bananymous/banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

LibC: use auxv for getpagesize

Browse Source
This commit is contained in:
Bananymous
2026-07-01 13:06:57 +03:00
parent 59c59c3316
commit 8be90c49bc
2 changed files with 7 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
userspace/libraries/LibC/malloc.cpp
View File

@@ -2,12 +2,12 @@
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
static constexpr size_t s_allocator_chunk_size { 64 };
static constexpr size_t s_allocator_size { 1024 * 1024 };
@@ -248,10 +248,11 @@ void* malloc(size_t total_size)
if (s_allocator_count == s_allocator_capacity)
{
const size_t allocator_pages = (s_allocator_capacity * sizeof(BitmapAllocator) + PAGE_SIZE - 1) / PAGE_SIZE;
const size_t page_size = getpagesize();
const size_t allocator_pages = (s_allocator_capacity * sizeof(BitmapAllocator) + page_size - 1) / page_size;
const size_t new_allocator_pages = allocator_pages + 1;
void* new_allocators = mmap(nullptr, new_allocator_pages * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
void* new_allocators = mmap(nullptr, new_allocator_pages * page_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (new_allocators == MAP_FAILED)
goto malloc_return;
@@ -261,7 +262,7 @@ void* malloc(size_t total_size)
munmap(s_allocators, s_allocator_capacity * sizeof(BitmapAllocator));
s_allocators = static_cast<BitmapAllocator*>(new_allocators);
s_allocator_capacity = new_allocator_pages * PAGE_SIZE / sizeof(BitmapAllocator);
s_allocator_capacity = new_allocator_pages * page_size / sizeof(BitmapAllocator);
}
if (!s_allocators[s_allocator_count].initialize())