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authorSverker Eriksson <[email protected]>2013-10-10 19:59:09 +0200
committerSverker Eriksson <[email protected]>2013-11-18 20:19:51 +0100
commit74c5c0314d4cf85365d89c1fdf41a5d286a7191a (patch)
tree860e7ec6f1fc8839a0d4f95e2caedad486d28fb4 /erts
parentd42bd3b37d3b741d546d94fd7611afda81bba419 (diff)
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trapping binary_to_term/2
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/beam/external.c73
1 files changed, 26 insertions, 47 deletions
diff --git a/erts/emulator/beam/external.c b/erts/emulator/beam/external.c
index 2116c25cd2..38280b7a99 100644
--- a/erts/emulator/beam/external.c
+++ b/erts/emulator/beam/external.c
@@ -108,7 +108,7 @@ static int encode_size_struct_int(Process *p, ErtsAtomCacheMap *acmp, Eterm obj,
static Export binary_to_term_trap_export;
static BIF_RETTYPE binary_to_term_trap_1(BIF_ALIST_1);
-static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b);
+static Eterm binary_to_term_int(Process* p, Uint32 flags, Eterm bin, Binary* context_b);
void erts_init_external(void) {
#if 1 /* In R16 */
@@ -1169,7 +1169,7 @@ typedef struct B2TContext_t {
Sint heap_size;
byte* aligned_alloc;
ErtsBinary2TermState b2ts;
- //Uint ext_size;
+ Uint32 flags;
SWord reds;
Eterm trap_bin;
enum B2TState state;
@@ -1316,15 +1316,22 @@ static BIF_RETTYPE binary_to_term_trap_1(BIF_ALIST_1)
Binary *context_bin = ((ProcBin *) binary_val(BIF_ARG_1))->val;
ASSERT(ERTS_MAGIC_BIN_DESTRUCTOR(context_bin) == b2t_context_destructor);
- return binary_to_term_int(BIF_P, THE_NON_VALUE, context_bin);
+ return binary_to_term_int(BIF_P, 0, THE_NON_VALUE, context_bin);
}
BIF_RETTYPE binary_to_term_1(BIF_ALIST_1)
{
- return binary_to_term_int(BIF_P, BIF_ARG_1, NULL);
+/*SVERK if (++sverk_cnt % 1000 == 0) {
+ erts_fprintf(stderr, "Call #%u to binary_to_term_int()\n", sverk_cnt);
+ }
+ if (sverk_cnt == 1767) {
+ sverk_break();
+ }
+*/
+ return binary_to_term_int(BIF_P, 0, BIF_ARG_1, NULL);
}
-#define B2T_BYTES_PER_REDUCTION 100
+#define B2T_BYTES_PER_REDUCTION 128
static unsigned sverk_rand(void)
{
@@ -1333,11 +1340,13 @@ static unsigned sverk_rand(void)
return prev;
}
-static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b)
+static Eterm binary_to_term_int(Process* p, Uint32 flags, Eterm bin, Binary* context_b)
{
+ SWord initial_reds = 1 + sverk_rand() % 4; /*(Uint)(ERTS_BIF_REDS_LEFT(p) * B2T_BYTES_PER_REDUCTION);*/
byte* bytes;
B2TContext c_buff;
B2TContext *ctx;
+ ErtsDistExternal fakedep;
Eterm* magic_space = NULL;
if (context_b == NULL) {
@@ -1345,11 +1354,12 @@ static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b)
ctx = &c_buff;
ctx->state = B2TSize;
ctx->aligned_alloc = NULL;
+ ctx->flags = flags;
IF_DEBUG(ctx->trap_bin = THE_NON_VALUE;)
} else {
ctx = ERTS_MAGIC_BIN_DATA(context_b);
}
- ctx->reds = 1 + sverk_rand() % 4; /*(Uint)(ERTS_BIF_REDS_LEFT(p) * B2T_BYTES_PER_REDUCTION);*/
+ ctx->reds = initial_reds;
do {
switch (ctx->state) {
@@ -1405,7 +1415,8 @@ static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b)
case B2TDecodeList:
case B2TDecodeTuple:
case B2TDecodeString:
- dec_term(NULL, NULL, NULL, &MSO(p), NULL, ctx);
+ fakedep.flags = ctx->flags;
+ dec_term(&fakedep, NULL, NULL, &MSO(p), NULL, ctx);
break;
case B2TDecodeFail:
@@ -1416,6 +1427,7 @@ static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b)
if (context_b) {
erts_set_gc_state(p, 1);
}
+ BUMP_REDS(p, (initial_reds - ctx->reds) / B2T_BYTES_PER_REDUCTION);
BIF_ERROR(p, BADARG);
case B2TDone:
@@ -1431,6 +1443,7 @@ static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b)
erts_set_gc_state(p, 1);
}
+ BUMP_REDS(p, (initial_reds - ctx->reds) / B2T_BYTES_PER_REDUCTION);
return ctx->u.dc.res;
}
@@ -1461,24 +1474,15 @@ static Eterm binary_to_term_int(Process* p, Eterm bin, Binary* context_b)
BIF_RETTYPE binary_to_term_2(BIF_ALIST_2)
{
- Sint heap_size;
- Eterm res;
Eterm opts;
Eterm opt;
- Eterm* hp;
- Eterm* endp;
- Sint size;
- byte* bytes;
- byte* temp_alloc = NULL;
- ErtsBinary2TermState b2ts;
- ErtsDistExternal fakedep;
+ Uint32 flags = 0;
- fakedep.flags = 0;
opts = BIF_ARG_2;
while (is_list(opts)) {
opt = CAR(list_val(opts));
if (opt == am_safe) {
- fakedep.flags |= ERTS_DIST_EXT_BTT_SAFE;
+ flags |= ERTS_DIST_EXT_BTT_SAFE;
}
else {
goto error;
@@ -1489,35 +1493,10 @@ BIF_RETTYPE binary_to_term_2(BIF_ALIST_2)
if (is_not_nil(opts))
goto error;
- if ((bytes = erts_get_aligned_binary_bytes(BIF_ARG_1, &temp_alloc)) == NULL) {
- error:
- erts_free_aligned_binary_bytes(temp_alloc);
- BIF_ERROR(BIF_P, BADARG);
- }
- size = binary_size(BIF_ARG_1);
-
- heap_size = binary2term_prepare(&b2ts, bytes, size);
- if (heap_size < 0)
- goto error;
-
- hp = HAlloc(BIF_P, heap_size);
- endp = hp + heap_size;
-
- res = binary2term_create(&fakedep, &b2ts, &hp, &MSO(BIF_P));
-
- erts_free_aligned_binary_bytes(temp_alloc);
-
- if (hp > endp) {
- erl_exit(1, ":%s, line %d: heap overrun by %d words(s)\n",
- __FILE__, __LINE__, hp-endp);
- }
-
- HRelease(BIF_P, endp, hp);
-
- if (res == THE_NON_VALUE)
- goto error;
+ return binary_to_term_int(BIF_P, flags, BIF_ARG_1, NULL);
- return res;
+error:
+ BIF_ERROR(BIF_P, BADARG);
}
Eterm