diff options
Diffstat (limited to 'erts/emulator/hipe/hipe_gc.c')
| -rw-r--r-- | erts/emulator/hipe/hipe_gc.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/erts/emulator/hipe/hipe_gc.c b/erts/emulator/hipe/hipe_gc.c index d0619a0609..68c65dea27 100644 --- a/erts/emulator/hipe/hipe_gc.c +++ b/erts/emulator/hipe/hipe_gc.c @@ -46,6 +46,8 @@ Eterm *fullsweep_nstack(Process *p, Eterm *n_htop) /* arch-specific nstack walk state */ struct nstack_walk_state walk_state; + ASSERT(!p->hipe.gc_is_unsafe); + if (!p->hipe.nstack) { ASSERT(!p->hipe.nsp && !p->hipe.nstend); return n_htop; @@ -136,6 +138,8 @@ void gensweep_nstack(Process *p, Eterm **ptr_old_htop, Eterm **ptr_n_htop) char *mature; Uint mature_size; + ASSERT(!p->hipe.gc_is_unsafe); + if (!p->hipe.nstack) { ASSERT(!p->hipe.nsp && !p->hipe.nstend); return; @@ -233,3 +237,122 @@ void gensweep_nstack(Process *p, Eterm **ptr_old_htop, Eterm **ptr_n_htop) } abort(); } + +Eterm *sweep_literals_nstack(Process *p, Eterm *old_htop, char *area, + Uint area_size) +{ + /* known nstack walk state */ + Eterm *nsp; + Eterm *nsp_end; + const struct sdesc *sdesc; + /* arch-specific nstack walk state */ + struct nstack_walk_state walk_state; + + ASSERT(!p->hipe.gc_is_unsafe); + + if (!p->hipe.nstack) { + ASSERT(!p->hipe.nsp && !p->hipe.nstend); + return old_htop; + } + if (!nstack_walk_init_check(p)) + return old_htop; + + ASSERT(p->hipe.nsp && p->hipe.nstend); + nsp = nstack_walk_nsp_begin(p); + nsp_end = nstack_walk_nsp_end(p); + sdesc = nstack_walk_init_sdesc_ignore_trap(p, &walk_state); + + while (!nstack_walk_nsp_reached_end(nsp, nsp_end)) { + unsigned long ra; + unsigned sdesc_size = nstack_walk_frame_size(sdesc); + unsigned i = 0; + unsigned mask = sdesc->livebits[0]; + for (;;) { + if (mask & 1) { + Eterm *nsp_i = nstack_walk_frame_index(nsp, i); + Eterm gval = *nsp_i; + if (is_boxed(gval)) { + Eterm *ptr = boxed_val(gval); + Eterm val = *ptr; + if (IS_MOVED_BOXED(val)) { + ASSERT(is_boxed(val)); + *nsp_i = val; + } else if (ErtsInArea(ptr, area, area_size)) { + MOVE_BOXED(ptr, val, old_htop, nsp_i); + } + } else if (is_list(gval)) { + Eterm *ptr = list_val(gval); + Eterm val = *ptr; + if (IS_MOVED_CONS(val)) { + *nsp_i = ptr[1]; + } else if (ErtsInArea(ptr, area, area_size)) { + MOVE_CONS(ptr, val, old_htop, nsp_i); + } + } + } + if (++i >= sdesc_size) + break; + if (i & 31) + mask >>= 1; + else + mask = sdesc->livebits[i >> 5]; + } + ra = nstack_walk_frame_ra(nsp, sdesc); + if (ra == (unsigned long)nbif_stack_trap_ra) + ra = (unsigned long)p->hipe.ngra; + sdesc = hipe_find_sdesc(ra); + nsp = nstack_walk_next_frame(nsp, sdesc_size); + } + return old_htop; +} + +int +nstack_any_heap_ref_ptrs(Process *rp, char* mod_start, Uint mod_size) +{ + Eterm *nsp; + Eterm *nsp_end; + const struct sdesc *sdesc; + /* arch-specific nstack walk state */ + struct nstack_walk_state walk_state; + + ASSERT(!rp->hipe.gc_is_unsafe); + + if (!rp->hipe.nstack || !nstack_walk_init_check(rp)) return 0; + ASSERT(rp->hipe.nsp && rp->hipe.nstend); + nsp = nstack_walk_nsp_begin(rp); + nsp_end = nstack_walk_nsp_end(rp); + sdesc = nstack_walk_init_sdesc_ignore_trap(rp, &walk_state); + + while (!nstack_walk_nsp_reached_end(nsp, nsp_end)) { + unsigned long ra; + unsigned sdesc_size = nstack_walk_frame_size(sdesc); + unsigned i = 0; + unsigned mask = sdesc->livebits[0]; + for (;;) { + if (mask & 1) { + Eterm *nsp_i = nstack_walk_frame_index(nsp, i); + Eterm val = *nsp_i; + switch (primary_tag(val)) { + case TAG_PRIMARY_BOXED: + case TAG_PRIMARY_LIST: + if (ErtsInArea(val, mod_start, mod_size)) { + return 1; + } + break; + } + } + if (++i >= sdesc_size) + break; + if (i & 31) + mask >>= 1; + else + mask = sdesc->livebits[i >> 5]; + } + ra = nstack_walk_frame_ra(nsp, sdesc); + if (ra == (unsigned long)nbif_stack_trap_ra) + ra = (unsigned long)rp->hipe.ngra; + sdesc = hipe_find_sdesc(ra); + nsp = nstack_walk_next_frame(nsp, sdesc_size); + } + return 0; +} |