/* read.c -- File views without mmap.
- Copyright (C) 2012-2013 Free Software Foundation, Inc.
+ Copyright (C) 2012-2020 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Google.
Redistribution and use in source and binary forms, with or without
met:
(1) Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
+ notice, this list of conditions and the following disclaimer.
(2) Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
- distribution.
-
+ distribution.
+
(3) The name of the author may not be used to
endorse or promote products derived from this software without
specific prior written permission.
int
backtrace_get_view (struct backtrace_state *state, int descriptor,
- off_t offset, size_t size,
+ off_t offset, uint64_t size,
backtrace_error_callback error_callback,
void *data, struct backtrace_view *view)
{
- ssize_t got;
+ uint64_t got;
+ ssize_t r;
+
+ if ((uint64_t) (size_t) size != size)
+ {
+ error_callback (data, "file size too large", 0);
+ return 0;
+ }
if (lseek (descriptor, offset, SEEK_SET) < 0)
{
view->data = view->base;
view->len = size;
- got = read (descriptor, view->base, size);
- if (got < 0)
+ got = 0;
+ while (got < size)
{
- error_callback (data, "read", errno);
- free (view->base);
- return 0;
+ r = read (descriptor, view->base, size - got);
+ if (r < 0)
+ {
+ error_callback (data, "read", errno);
+ free (view->base);
+ return 0;
+ }
+ if (r == 0)
+ break;
+ got += (uint64_t) r;
}
- if ((size_t) got < size)
+ if (got < size)
{
error_callback (data, "file too short", 0);
free (view->base);