diff options
| -rw-r--r-- | src/process.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/process.c b/src/process.c index 8d500ae..4004ae1 100644 --- a/src/process.c +++ b/src/process.c @@ -1286,7 +1286,13 @@ static boolean eat_seek(uint32 pidx, boolean forward) return FALSE; } - if (g_procs[pidx].sp == next_addr) { + /* Processes may only eat code copies from memory areas that are either + deallocated or owned by them (i.e. writeable). + */ + if ( + !is_writeable_by(pidx, g_procs[pidx].sp) || + g_procs[pidx].sp == next_addr + ) { increment_sp(pidx, forward); return FALSE; } @@ -1313,7 +1319,8 @@ static void eat(uint32 pidx) However, whenever an organism eats, the detected copy of the source code gets destroyed (randomized). The main idea of the EAT instruction is to - turn 'information' into a valuable resource in Salis. + turn 'information' into a valuable resource in Salis. Organisms, + nonetheless, may only eat information which they have 'write' access to. */ uint32 source; uint32 target; |