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added test for new buddy malloc implementation

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This commit is contained in:
Steffen Vogel 2013-11-20 12:14:13 +01:00
parent 7a3e77c82d
commit 60f8f53169
1 changed files with 57 additions and 0 deletions
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57
apps/paging.c
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@ -24,6 +24,7 @@
#include <metalsvm/time.h>
#include <metalsvm/tasks.h>
#include <metalsvm/vma.h>
#include <metalsvm/malloc.h>
#include <asm/page.h>
#include <asm/processor.h>
@ -53,6 +54,16 @@ static void test(size_t expr, char *fmt, ...)
abort();
}
/** @brief Linear feedback shift register PRNG */
static uint16_t rand()
{
static uint16_t lfsr = 0xACE1u;
static uint16_t bit;
bit = ((lfsr >> 0) ^ (lfsr >> 2) ^ (lfsr >> 3) ^ (lfsr >> 5) ) & 1;
return lfsr = (lfsr >> 1) | (bit << 15);
}
/** @brief BSD sum algorithm ('sum' Unix command) and used by QEmu */
uint16_t checksum(size_t start, size_t end) {
size_t addr;
@ -211,14 +222,60 @@ static void vma(void)
vma_dump();
}
/** @brief Test of the kernel malloc allocator */
static void malloc(void)
{
int i;
int* p[20];
int* a;
// kmalloc() test
buddy_dump();
a = kmalloc(SIZE);
test(a != NULL, "kmalloc(%lu) = %p", SIZE, a);
buddy_dump();
// simple write/read test
for (i=0; i<SIZE/sizeof(int); i++)
a[i] = i;
for (i=0; i<SIZE/sizeof(int); i++) {
if (a[i] != i)
test(0, "data mismatch: *(%p) != %lu", &a[i], i);
}
test(1, "data is equal");
// kfree() test
kfree(a);
test(1, "kfree(%p)", a);
buddy_dump();
// some random malloc/free patterns to stress the buddy system
for (i=0; i<20; i++) {
uint16_t sz = rand();
p[i] = kmalloc(sz);
test(p[i], "kmalloc(%u) = %p", sz, p[i]);
}
buddy_dump();
for (i=0; i<20; i++) {
kfree(p[i]);
test(1, "kfree(%p)", p[i]);
}
buddy_dump();
}
/** @brief This is a simple procedure to test memory management subsystem */
int memory(void* arg)
{
kprintf("======== PAGING: test started...\n");
paging();
kprintf("======== VMA: test started...\n");
vma();
kprintf("======== MALLOC: test started...\n");
malloc();
kprintf("======== All tests finished successfull...\n");