push

2026-05-07 02:22:25 +03:00
commit 1a9fd27a31
226 changed files with 29188 additions and 0 deletions
@@ -0,0 +1,78 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/cervus.h>
+
+static int failed = 0;
+static void ok(const char *s)   { printf("  [OK]  %s\n", s); }
+static void fail(const char *s) { printf("  [FAIL] %s\n", s); failed = 1; }
+
+int main(int argc, char **argv)
+{
+    (void)argc; (void)argv;
+    puts("--- test_mem ---");
+
+    void *brk0 = sbrk(0);
+    printf("  initial brk = %p\n", brk0);
+    if ((uintptr_t)brk0 > 0) ok("sbrk(0) returns valid address");
+    else fail("sbrk(0)");
+
+    void *old = sbrk(4096);
+    if (old == brk0) ok("sbrk(4096) returns old brk");
+    else fail("sbrk(4096)");
+
+    volatile uint8_t *heap = (volatile uint8_t *)brk0;
+    heap[0] = 0xAB; heap[4095] = 0xCD;
+    if (heap[0] == 0xAB && heap[4095] == 0xCD) ok("write/read heap page");
+    else fail("write/read heap page");
+
+    void *cur = sbrk(0);
+    sbrk(-4096);
+    void *after = sbrk(0);
+    if ((uintptr_t)after == (uintptr_t)cur - 4096) ok("sbrk shrink");
+    else fail("sbrk shrink");
+
+    void *m = mmap(NULL, 8192, PROT_READ | PROT_WRITE,
+                   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+    if (m != MAP_FAILED) {
+        ok("mmap anonymous 8 KiB");
+        volatile uint8_t *p = (volatile uint8_t *)m;
+        p[0] = 0x11; p[8191] = 0x22;
+        if (p[0] == 0x11 && p[8191] == 0x22) ok("write/read mmap pages");
+        else fail("write/read mmap pages");
+        if (munmap(m, 8192) == 0) ok("munmap");
+        else fail("munmap");
+    } else fail("mmap anonymous");
+
+    void *big = mmap(NULL, 1024 * 1024, PROT_READ | PROT_WRITE,
+                     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+    if (big != MAP_FAILED) {
+        ok("mmap 1 MiB");
+        volatile uint8_t *bp = (volatile uint8_t *)big;
+        int ok_all = 1;
+        for (int i = 0; i < 256; i++) {
+            bp[i * 4096] = (uint8_t)i;
+            if (bp[i * 4096] != (uint8_t)i) ok_all = 0;
+        }
+        if (ok_all) ok("touch 256 pages of 1 MiB mmap");
+        else fail("touch mmap pages");
+        munmap(big, 1024 * 1024);
+    } else fail("mmap 1 MiB");
+
+    {
+        void *addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE,
+                          MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        if (addr != MAP_FAILED) {
+            munmap(addr, 4096);
+            void *fixed = mmap(addr, 4096, PROT_READ | PROT_WRITE,
+                               MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+            if (fixed == addr) ok("MAP_FIXED at specific address");
+            else fail("MAP_FIXED");
+            if (fixed != MAP_FAILED) munmap(fixed, 4096);
+        }
+    }
+
+    puts("--- test_mem done ---");
+    return failed ? 1 : 0;
+}