mirror/guile
mirror/guile
1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-06-10 22:10:21 +02:00
Code Activity

Fix default code allocator in Lightning

Browse source 
* libguile/lightning/lib/lightning.c (_jit_emit): The default code
  allocator will simply mmap a code buffer, try to emit into that
  buffer, and if it fails, try again with a larger buffer.  However the
  buffer size starts at 0, for some reason.  Why?  I can't see the
  reason.  Change the default to 4096.  In the future we will need to
  implement our own allocator anyway so that we can pack multiple JIT
  runs in one page.
This commit is contained in:
Andy Wingo 2018-08-20 08:59:19 +02:00
parent dca1e9d7bd
commit 4a9de64f81
1 changed files with 3 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
libguile/lightning/lib/lightning.c
View file

@ -2070,6 +2070,9 @@ _jit_emit(jit_state_t *_jit)
#if defined(__sgi)
mmap_fd = open("/dev/zero", O_RDWR);
#endif
if (_jit->code.length == 0)
_jit->code.length = 4096;
_jit->code.ptr = mmap(NULL, _jit->code.length,
PROT_EXEC | PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, mmap_fd, 0);