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-rw-r--r--erts/emulator/sys/common/erl_mmap.c48
-rw-r--r--erts/emulator/sys/common/erl_mmap.h2
2 files changed, 49 insertions, 1 deletions
diff --git a/erts/emulator/sys/common/erl_mmap.c b/erts/emulator/sys/common/erl_mmap.c
index 0ac08a0004..1d18c1fcc9 100644
--- a/erts/emulator/sys/common/erl_mmap.c
+++ b/erts/emulator/sys/common/erl_mmap.c
@@ -23,6 +23,7 @@
#include "sys.h"
#include "erl_process.h"
#include "erl_smp.h"
+#include "atom.h"
#include "erl_mmap.h"
#include <stddef.h>
@@ -741,7 +742,7 @@ rbt_foreach_node(RBTree* tree,
enum { RECURSE_LEFT, DO_NODE, RECURSE_RIGHT, RETURN_TO_PARENT }state;
RBTNode *x = tree->root;
- RBT_ASSERT(!parent(x));
+ RBT_ASSERT(!x || !parent(x));
state = reverse ? RECURSE_RIGHT : RECURSE_LEFT;
while (x) {
@@ -1942,6 +1943,51 @@ erts_mmap_init(ErtsMMapInit *init)
#endif
}
+Eterm erts_mmap_info(Process* p)
+{
+ if (mmap_state.supercarrier) {
+ ERTS_DECL_AM(sabot);
+ ERTS_DECL_AM(satop);
+ ERTS_DECL_AM(suabot);
+ ERTS_DECL_AM(suatop);
+ Eterm sa_list, sua_list, list;
+ Eterm tags[] = { AM_sabot, AM_satop, AM_suabot, AM_suatop };
+ UWord values[4];
+ Eterm *hp, *hp_end;
+ Uint may_need;
+ const Uint PTR_BIG_SZ = HALFWORD_HEAP ? 3 : 2;
+
+ erts_smp_mtx_lock(&mmap_state.mtx);
+ values[0] = (UWord)mmap_state.sa.bot;
+ values[1] = (UWord)mmap_state.sa.top;
+ values[2] = (UWord)mmap_state.sua.bot;
+ values[3] = (UWord)mmap_state.sua.top;
+ sa_list = build_free_seg_list(p, &mmap_state.sa.map);
+ sua_list = build_free_seg_list(p, &mmap_state.sua.map);
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+
+ may_need = 4*(2+3+PTR_BIG_SZ) + 2*(2+3);
+ hp = HAlloc(p, may_need);
+ hp_end = hp + may_need;
+
+ list = erts_bld_atom_uint_2tup_list(&hp, NULL,
+ sizeof(values)/sizeof(*values),
+ tags, values);
+
+ sa_list = TUPLE2(hp, am_atom_put("sa_free_segs",12), sa_list); hp+=3;
+ sua_list = TUPLE2(hp, am_atom_put("sua_free_segs",13), sua_list); hp+=3;
+ list = CONS(hp, sua_list, list); hp+=2;
+ list = CONS(hp, sa_list, list); hp+=2;
+
+ ASSERT(hp <= hp_end);
+ HRelease(p, hp_end, hp);
+ return list;
+ }
+ else {
+ return am_undefined;
+ }
+}
+
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Debug functions *
\* */
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h
index 143f1aff3e..b75200f4e9 100644
--- a/erts/emulator/sys/common/erl_mmap.h
+++ b/erts/emulator/sys/common/erl_mmap.h
@@ -57,6 +57,8 @@ void erts_munmap(Uint32 flags, void **ptrp, UWord *sizep);
void *erts_mremap(Uint32 flags, void *ptr, UWord old_size, UWord *sizep);
int erts_mmap_in_supercarrier(void *ptr);
void erts_mmap_init(ErtsMMapInit*);
+struct process;
+Eterm erts_mmap_info(struct process*);
#define ERTS_SUPERALIGNED_SIZE \
(1 << ERTS_MMAP_SUPERALIGNED_BITS)