#endif
#include "mmprivate.h"
+#include "xbt/ex.h"
/* Cache the pagesize for the current host machine. Note that if the host
does not readily provide a getpagesize() function, we need to emulate it
if (size == 0) {
/* Just return the current "break" value. */
result = mdp->breakval;
+
} else if (size < 0) {
/* We are deallocating memory. If the amount requested would cause
us to try to deallocate back past the base of the mmap'd region
/* We are allocating memory. Make sure we have an open file
descriptor if not working with anonymous memory. */
if (!(mdp->flags & MMALLOC_ANONYMOUS) && mdp->fd < 0) {
+ THROWF(system_error,0,"mmap file descriptor <0 (%d), without MMALLOC_ANONYMOUS being in the flags",mdp->fd);
result = NULL;
} else if ((char *) mdp->breakval + size > (char *) mdp->top) {
/* The request would move us past the end of the currently
foffset = (char *) mdp->top - (char *) mdp->base;
if (mdp->fd > 0) {
- /* FIXME: Test results of lseek() and write() */
+ /* FIXME: Test results of lseek() */
lseek(mdp->fd, foffset + mapbytes - 1, SEEK_SET);
test = write(mdp->fd, &buf, 1);
+ if (test == -1)
+ THROWF(system_error, 0, "write to mmap'ed fd failed! error: %s", strerror(errno));
}
/* Let's call mmap. Note that it is possible that mdp->top
MAP_PRIVATE_OR_SHARED(mdp) | MAP_IS_ANONYMOUS(mdp) |
MAP_FIXED, MAP_ANON_OR_FD(mdp), foffset);
- if (mapto != (void *) -1) {
+ if (mapto != (void *) -1/* That's MAP_FAILED */) {
if (mdp->top == 0)
mdp->base = mdp->breakval = mapto;
mdp->top = PAGE_ALIGN((char *) mdp->breakval + size);
result = (void *) mdp->breakval;
mdp->breakval = (char *) mdp->breakval + size;
+ } else {
+ THROWF(system_error,0,"mmap returned MAP_FAILED! error: %s",strerror(errno));
}
} else {
result = (void *) mdp->breakval;