Userspace dlmalloc port, supporting syscalls mman_map()/mman_unmap()

ulib/dlmalloc/dlmalloc_port.inc

@@ -0,0 +1,76 @@
+// Config
+
+#include <stddef.h>
+#include <dlmalloc/malloc.h>
+#include <uprintf.h>
+#include <errors.h>
+#include <sync/spinlock.h>
+#include <string/string.h>
+#include <sysdefs/mman.h>
+#include <system/system.h>
+
+#define USE_DL_PREFIX 1
+#define LACKS_SYS_TYPES_H 1
+#define NO_MALLOC_STATS 1
+#define LACKS_ERRNO_H 1
+#define LACKS_TIME_H 1
+#define LACKS_STDLIB_H 1
+#define LACKS_SYS_MMAN_H 1
+#define LACKS_FCNTL_H 1
+#define LACKS_UNISTD_H 1
+#define LACKS_SYS_PARAM_H 1
+#define LACKS_STRINGS_H 1
+#define LACKS_SCHED_H 1
+#define HAVE_MMAP 0
+#define ABORT \
+  do { \
+    uprintf("dlmalloc: Aborting...\n"); \
+  } while(0)
+#define MALLOC_FAILURE_ACTION
+#define HAVE_MORECORE 1
+#define USE_LOCKS 2
+#define malloc_getpagesize 0x1000
+#define EINVAL E_INVALIDARGUMENT
+#define ENOMEM E_NOMEMORY
+
+#define MLOCK_T SpinLock
+
+int ACQUIRE_LOCK(SpinLock *sl) {
+  spinlock_acquire(sl);
+  return 0;
+}
+
+int RELEASE_LOCK(SpinLock *sl) {
+  spinlock_release(sl);
+  return 0;
+}
+
+int INITIAL_LOCK(SpinLock *sl) {
+  spinlock_release(sl);
+  return 0;
+}
+    
+static MLOCK_T malloc_global_mutex = { 0 };
+
+#define PAGE_SIZE 0x1000
+static uint8_t *heap_end = NULL;
+
+void *sbrk(long inc) {
+  if (inc == 0) {
+    return heap_end;
+  }
+
+  uint8_t *new_heap_end = heap_end + inc;
+  if (new_heap_end > heap_end) {
+    size_t size = new_heap_end - heap_end;
+
+    uint8_t *out = NULL;
+    int32_t ret = mman_map(heap_end, size, MMAN_MAP_PF_RW, 0, &out);
+    if (ret != E_OK) {
+      return (void *)-1;
+    }
+    string_memset(out, 0, size);
+  }
+  heap_end = new_heap_end;
+  return (void *)heap_end;
+}