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authorSverker Eriksson <[email protected]>2015-06-02 19:23:49 +0200
committerSverker Eriksson <[email protected]>2015-06-15 14:48:22 +0200
commit02d0ce034598297565f2b35ecc3d1af121787f33 (patch)
treea415e4b7d21c240352ae8737806e516caa2f2b43 /erts/emulator/beam/external.h
parent512c321bdaf25b685124405e287a3839be467149 (diff)
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erts: Remove hashmap probabilistic heap overestimation
by adding a dynamic heap factory. "binary_to_term" is now a hybrid solution with both a call to decoded_size() to calculate needed heap space AND possible dynamic allocation of more heap space if needed for big maps. The heap size returned from decoded_size() is guaranteed to be sufficient for all term heap data except for hashmap nodes. All hashmap nodes are created at the end of dec_term() by invoking the heap factory interface that may allocate more heap space on process heap or in fragments. With this commit it is no longer guaranteed that a message is confined to only one heap fragment.
Diffstat (limited to 'erts/emulator/beam/external.h')
-rw-r--r--erts/emulator/beam/external.h9
1 files changed, 5 insertions, 4 deletions
diff --git a/erts/emulator/beam/external.h b/erts/emulator/beam/external.h
index 50fcfa04d6..508ab8dc17 100644
--- a/erts/emulator/beam/external.h
+++ b/erts/emulator/beam/external.h
@@ -148,6 +148,7 @@ typedef struct {
byte *extp;
int exttmp;
Uint extsize;
+ Uint heap_size;
} ErtsBinary2TermState;
@@ -185,18 +186,18 @@ void erts_destroy_dist_ext_copy(ErtsDistExternal *);
int erts_prepare_dist_ext(ErtsDistExternal *, byte *, Uint,
DistEntry *, ErtsAtomCache *);
Sint erts_decode_dist_ext_size(ErtsDistExternal *);
-Eterm erts_decode_dist_ext(Eterm **, ErlOffHeap *, ErtsDistExternal *);
+Eterm erts_decode_dist_ext(ErtsHeapFactory* factory, ErtsDistExternal *);
Sint erts_decode_ext_size(byte*, Uint);
Sint erts_decode_ext_size_ets(byte*, Uint);
-Eterm erts_decode_ext(Eterm **, ErlOffHeap *, byte**);
-Eterm erts_decode_ext_ets(Eterm **, ErlOffHeap *, byte*);
+Eterm erts_decode_ext(ErtsHeapFactory*, byte**);
+Eterm erts_decode_ext_ets(ErtsHeapFactory*, byte*);
Eterm erts_term_to_binary(Process* p, Eterm Term, int level, Uint flags);
Sint erts_binary2term_prepare(ErtsBinary2TermState *, byte *, Sint);
void erts_binary2term_abort(ErtsBinary2TermState *);
-Eterm erts_binary2term_create(ErtsBinary2TermState *, Eterm **hpp, ErlOffHeap *);
+Eterm erts_binary2term_create(ErtsBinary2TermState *, ErtsHeapFactory*);
int erts_debug_max_atom_out_cache_index(void);
int erts_debug_atom_to_out_cache_index(Eterm);