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-rw-r--r--erts/emulator/beam/atom.c61
-rw-r--r--erts/emulator/beam/atom.h51
-rw-r--r--erts/emulator/beam/beam_load.c6
-rw-r--r--erts/emulator/beam/bif.c36
-rw-r--r--erts/emulator/beam/dist.h1
-rw-r--r--erts/emulator/beam/erl_alloc.c6
-rw-r--r--erts/emulator/beam/erl_alloc_util.c4
-rw-r--r--erts/emulator/beam/erl_nif.c8
-rw-r--r--erts/emulator/beam/erl_unicode.c174
-rw-r--r--erts/emulator/beam/external.c127
-rw-r--r--erts/emulator/beam/external.h2
-rwxr-xr-xerts/emulator/beam/global.h1
-rw-r--r--erts/emulator/test/bif_SUITE.erl4
13 files changed, 312 insertions, 169 deletions
diff --git a/erts/emulator/beam/atom.c b/erts/emulator/beam/atom.c
index d7c7f117cf..b41a98f2a2 100644
--- a/erts/emulator/beam/atom.c
+++ b/erts/emulator/beam/atom.c
@@ -111,7 +111,7 @@ atom_text_alloc(int bytes)
{
byte *res;
- ASSERT(bytes <= MAX_ATOM_LENGTH);
+ ASSERT(bytes <= MAX_ATOM_SZ_LIMIT);
if (atom_text_pos + bytes >= atom_text_end) {
more_atom_space();
}
@@ -198,7 +198,11 @@ am_atom_put(const char* name, int len)
Atom a;
Eterm ret;
int aix;
-
+#ifdef DEBUG
+ byte* err_pos;
+ Uint num_chars;
+ ASSERT(erts_analyze_utf8(name, len, &err_pos, &num_chars, NULL) == ERTS_UTF8_OK);
+#endif
/*
* Silently truncate the atom if it is too long. Overlong atoms
* could occur in situations where we have no good way to return
@@ -209,8 +213,8 @@ am_atom_put(const char* name, int len)
* list_to_atom/1), the caller should check the length before
* calling this function.
*/
- if (len > MAX_ATOM_LENGTH) {
- len = MAX_ATOM_LENGTH;
+ if (len > MAX_ATOM_SZ_LIMIT) {
+ len = MAX_ATOM_SZ_LIMIT; /*SVERK Urk... */
}
#ifdef ERTS_ATOM_PUT_OPS_STAT
erts_smp_atomic_inc_nob(&atom_put_ops);
@@ -230,6 +234,49 @@ am_atom_put(const char* name, int len)
return ret;
}
+static void latin1_to_utf8(byte* conv_buf, const byte** srcp, int* lenp)
+{
+ byte* dst;
+ const byte* src = *srcp;
+ int i, len = *lenp;
+
+ for (i=0 ; i < len; ++i) {
+ if (src[i] & 0x80) {
+ goto need_convertion;
+ }
+ }
+ return;
+
+need_convertion:
+ sys_memcpy(conv_buf, src, i);
+ dst = conv_buf + i;
+ for ( ; i < len; ++i) {
+ unsigned char chr = src[i];
+ if (!(chr & 0x80)) {
+ *dst++ = chr;
+ }
+ else {
+ *dst++ = 0xC0 | (chr >> 6);
+ *dst++ = 0x80 | (chr & 0x3F);
+ }
+ }
+ *srcp = conv_buf;
+ *lenp = dst - conv_buf;
+}
+
+
+Eterm
+am_atom_put2(const byte* name, int len, int is_latin1)
+{
+ byte utf8_copy[MAX_ATOM_SZ_FROM_LATIN1];
+
+ if (is_latin1) {
+ latin1_to_utf8(utf8_copy, &name, &len);
+ }
+ return am_atom_put((const char*)name, len);
+}
+
+
int atom_table_size(void)
{
@@ -264,14 +311,18 @@ int atom_table_sz(void)
}
int
-erts_atom_get(const char *name, int len, Eterm* ap)
+erts_atom_get(const char *name, int len, Eterm* ap, int is_latin1)
{
+ byte utf8_copy[MAX_ATOM_SZ_FROM_LATIN1];
Atom a;
int i;
int res;
a.len = len;
a.name = (byte *)name;
+ if (is_latin1) {
+ latin1_to_utf8(utf8_copy, (const byte**)&a.name, &a.len);
+ }
atom_read_lock();
i = index_get(&erts_atom_table, (void*) &a);
res = i < 0 ? 0 : (*ap = make_atom(i), 1);
diff --git a/erts/emulator/beam/atom.h b/erts/emulator/beam/atom.h
index fd9c04d3d0..84dd6d8901 100644
--- a/erts/emulator/beam/atom.h
+++ b/erts/emulator/beam/atom.h
@@ -26,7 +26,9 @@
#include "erl_atom_table.h"
-#define MAX_ATOM_LENGTH 255
+#define MAX_ATOM_CHARACTERS 255
+#define MAX_ATOM_SZ_FROM_LATIN1 (2*MAX_ATOM_CHARACTERS)
+#define MAX_ATOM_SZ_LIMIT (4*MAX_ATOM_CHARACTERS) /* theoretical byte limit */
#define ATOM_LIMIT (1024*1024)
#define MIN_ATOM_TABLE_SIZE 8192
@@ -53,8 +55,8 @@ typedef struct atom {
extern IndexTable erts_atom_table;
ERTS_GLB_INLINE Atom* atom_tab(Uint i);
-ERTS_GLB_INLINE int erts_is_atom_bytes(byte *text, size_t len, Eterm term);
-ERTS_GLB_INLINE int erts_is_atom_str(char *str, Eterm term);
+ERTS_GLB_INLINE int erts_is_atom_utf8_bytes(byte *text, size_t len, Eterm term);
+ERTS_GLB_INLINE int erts_is_atom_str(const char *str, Eterm term, int is_latin1);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE Atom*
@@ -63,7 +65,7 @@ atom_tab(Uint i)
return (Atom *) erts_index_lookup(&erts_atom_table, i);
}
-ERTS_GLB_INLINE int erts_is_atom_bytes(byte *text, size_t len, Eterm term)
+ERTS_GLB_INLINE int erts_is_atom_utf8_bytes(byte *text, size_t len, Eterm term)
{
Atom *a;
if (!is_atom(term))
@@ -73,30 +75,50 @@ ERTS_GLB_INLINE int erts_is_atom_bytes(byte *text, size_t len, Eterm term)
&& sys_memcmp((void *) a->name, (void *) text, len) == 0);
}
-ERTS_GLB_INLINE int erts_is_atom_str(char *str, Eterm term)
+ERTS_GLB_INLINE int erts_is_atom_str(const char *str, Eterm term, int is_latin1)
{
Atom *a;
int i, len;
- char *aname;
+ const byte* aname;
+ const byte* s = (const byte*) str;
+
if (!is_atom(term))
return 0;
a = atom_tab(atom_val(term));
len = a->len;
- aname = (char *) a->name;
- for (i = 0; i < len; i++)
- if (aname[i] != str[i] || str[i] == '\0')
- return 0;
- return str[len] == '\0';
+ aname = a->name;
+ if (is_latin1) {
+ for (i = 0; i < len; s++) {
+ if (aname[i] < 0x80) {
+ if (aname[i] != *s || *s == '\0')
+ return 0;
+ i++;
+ }
+ else {
+ if (aname[i] != (0xC0 | (*s >> 6)) ||
+ aname[i+1] != (0x80 | (*s & 0x3F))) {
+ return 0;
+ }
+ i += 2;
+ }
+ }
+ }
+ else {
+ for (i = 0; i < len; i++, s++)
+ if (aname[i] != *s || *s == '\0')
+ return 0;
+ }
+ return *s == '\0';
}
#endif
/*
* Note, ERTS_IS_ATOM_STR() expects the first argument to be a
- * string literal.
+ * 7-bit ASCII string literal.
*/
#define ERTS_IS_ATOM_STR(LSTR, TERM) \
- (erts_is_atom_bytes((byte *) LSTR, sizeof(LSTR) - 1, (TERM)))
+ (erts_is_atom_utf8_bytes((byte *) LSTR, sizeof(LSTR) - 1, (TERM)))
#define ERTS_DECL_AM(S) Eterm AM_ ## S = am_atom_put(#S, sizeof(#S) - 1)
#define ERTS_INIT_AM(S) AM_ ## S = am_atom_put(#S, sizeof(#S) - 1)
@@ -104,12 +126,13 @@ int atom_table_size(void); /* number of elements */
int atom_table_sz(void); /* table size in bytes, excluding stored objects */
Eterm am_atom_put(const char*, int); /* most callers pass plain char*'s */
+Eterm am_atom_put2(const byte*, int, int is_latin1);
int atom_erase(byte*, int);
int atom_static_put(byte*, int);
void init_atom_table(void);
void atom_info(int, void *);
void dump_atoms(int, void *);
-int erts_atom_get(const char* name, int len, Eterm* ap);
+int erts_atom_get(const char* name, int len, Eterm* ap, int is_latin1);
void erts_atom_get_text_space_sizes(Uint *reserved, Uint *used);
#endif
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index b51f076a5d..7bb964d5aa 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -1230,7 +1230,7 @@ load_atom_table(LoaderState* stp)
GetByte(stp, n);
GetString(stp, atom, n);
- stp->atom[i] = am_atom_put((char*)atom, n);
+ stp->atom[i] = am_atom_put2(atom, n, 1);
}
/*
@@ -1240,7 +1240,7 @@ load_atom_table(LoaderState* stp)
if (is_nil(stp->module)) {
stp->module = stp->atom[1];
} else if (stp->atom[1] != stp->module) {
- char sbuf[256];
+ char sbuf[MAX_ATOM_SZ_FROM_LATIN1];
Atom* ap;
ap = atom_tab(atom_val(stp->atom[1]));
@@ -1620,7 +1620,7 @@ read_line_table(LoaderState* stp)
GetInt(stp, 2, n);
GetString(stp, fname, n);
- stp->fname[i] = am_atom_put((char*)fname, n);
+ stp->fname[i] = am_atom_put((char*)fname, n); /*SVERK ? */
}
}
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index 1cdce49eef..89157068c0 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -2536,9 +2536,11 @@ BIF_RETTYPE append_element_2(BIF_ALIST_2)
BIF_RETTYPE atom_to_list_1(BIF_ALIST_1)
{
- Uint need;
- Eterm* hp;
+ Eterm do_utf8_to_list(Process*, Uint num, byte *bytes, Uint sz, Uint left,
+ Uint *num_built, Uint *num_eaten, Eterm tail); /*SVERK */
Atom* ap;
+ Uint num_chars, num_built, num_eaten;
+ Eterm res;
if (is_not_atom(BIF_ARG_1))
BIF_ERROR(BIF_P, BADARG);
@@ -2547,9 +2549,19 @@ BIF_RETTYPE atom_to_list_1(BIF_ALIST_1)
ap = atom_tab(atom_val(BIF_ARG_1));
if (ap->len == 0)
BIF_RET(NIL); /* the empty atom */
- need = ap->len*2;
- hp = HAlloc(BIF_P, need);
- BIF_RET(buf_to_intlist(&hp,(char*)ap->name,ap->len, NIL));
+ {
+ byte* err_pos;
+ if (erts_analyze_utf8(ap->name, ap->len, &err_pos, &num_chars, NULL)
+ != ERTS_UTF8_OK) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+ }
+
+ res = do_utf8_to_list(BIF_P, num_chars, ap->name, ap->len, ap->len,
+ &num_built, &num_eaten, NIL);
+ ASSERT(num_built == num_chars);
+ ASSERT(num_eaten == ap->len);
+ BIF_RET(res);
}
/**********************************************************************/
@@ -2559,18 +2571,18 @@ BIF_RETTYPE atom_to_list_1(BIF_ALIST_1)
BIF_RETTYPE list_to_atom_1(BIF_ALIST_1)
{
Eterm res;
- char *buf = (char *) erts_alloc(ERTS_ALC_T_TMP, MAX_ATOM_LENGTH);
- int i = intlist_to_buf(BIF_ARG_1, buf, MAX_ATOM_LENGTH);
+ char *buf = (char *) erts_alloc(ERTS_ALC_T_TMP, MAX_ATOM_CHARACTERS);
+ int i = intlist_to_buf(BIF_ARG_1, buf, MAX_ATOM_CHARACTERS);
if (i < 0) {
erts_free(ERTS_ALC_T_TMP, (void *) buf);
i = list_length(BIF_ARG_1);
- if (i > MAX_ATOM_LENGTH) {
+ if (i > MAX_ATOM_CHARACTERS) {
BIF_ERROR(BIF_P, SYSTEM_LIMIT);
}
BIF_ERROR(BIF_P, BADARG);
}
- res = am_atom_put(buf, i);
+ res = am_atom_put2((byte*)buf, i, 1);
erts_free(ERTS_ALC_T_TMP, (void *) buf);
BIF_RET(res);
}
@@ -2580,16 +2592,16 @@ BIF_RETTYPE list_to_atom_1(BIF_ALIST_1)
BIF_RETTYPE list_to_existing_atom_1(BIF_ALIST_1)
{
int i;
- char *buf = (char *) erts_alloc(ERTS_ALC_T_TMP, MAX_ATOM_LENGTH);
+ char *buf = (char *) erts_alloc(ERTS_ALC_T_TMP, MAX_ATOM_CHARACTERS);
- if ((i = intlist_to_buf(BIF_ARG_1, buf, MAX_ATOM_LENGTH)) < 0) {
+ if ((i = intlist_to_buf(BIF_ARG_1, buf, MAX_ATOM_CHARACTERS)) < 0) {
error:
erts_free(ERTS_ALC_T_TMP, (void *) buf);
BIF_ERROR(BIF_P, BADARG);
} else {
Eterm a;
- if (erts_atom_get(buf, i, &a)) {
+ if (erts_atom_get(buf, i, &a, 1)) {
erts_free(ERTS_ALC_T_TMP, (void *) buf);
BIF_RET(a);
} else {
diff --git a/erts/emulator/beam/dist.h b/erts/emulator/beam/dist.h
index 0db7d56cb2..129f637dba 100644
--- a/erts/emulator/beam/dist.h
+++ b/erts/emulator/beam/dist.h
@@ -39,6 +39,7 @@
#define DFLAG_DIST_HDR_ATOM_CACHE 0x2000
#define DFLAG_SMALL_ATOM_TAGS 0x4000
#define DFLAG_INTERNAL_TAGS 0x8000
+#define DFLAG_UTF8_ATOMS 0x10000
/* All flags that should be enabled when term_to_binary/1 is used. */
#define TERM_TO_BINARY_DFLAGS (DFLAG_EXTENDED_REFERENCES \
diff --git a/erts/emulator/beam/erl_alloc.c b/erts/emulator/beam/erl_alloc.c
index 3eee53eba3..061f229f59 100644
--- a/erts/emulator/beam/erl_alloc.c
+++ b/erts/emulator/beam/erl_alloc.c
@@ -3045,13 +3045,13 @@ erts_request_alloc_info(struct process *c_p,
Eterm alloc = CAR(consp);
for (ai = ERTS_ALC_A_MIN; ai <= ERTS_ALC_A_MAX; ai++)
- if (erts_is_atom_str((char *) erts_alc_a2ad[ai], alloc))
+ if (erts_is_atom_str(erts_alc_a2ad[ai], alloc, 0))
goto save_alloc;
- if (erts_is_atom_str("mseg_alloc", alloc)) {
+ if (erts_is_atom_str("mseg_alloc", alloc, 0)) {
ai = ERTS_ALC_INFO_A_MSEG_ALLOC;
goto save_alloc;
}
- if (erts_is_atom_str("alloc_util", alloc)) {
+ if (erts_is_atom_str("alloc_util", alloc, 0)) {
ai = ERTS_ALC_INFO_A_ALLOC_UTIL;
save_alloc:
if (req_ai[ai])
diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c
index 97ba306a79..f8a8c00715 100644
--- a/erts/emulator/beam/erl_alloc_util.c
+++ b/erts/emulator/beam/erl_alloc_util.c
@@ -2815,10 +2815,10 @@ make_name_atoms(Allctr_t *allctr)
char alloc[] = "alloc";
char realloc[] = "realloc";
char free[] = "free";
- char buf[MAX_ATOM_LENGTH];
+ char buf[MAX_ATOM_CHARACTERS];
size_t prefix_len = strlen(allctr->name_prefix);
- if (prefix_len > MAX_ATOM_LENGTH + sizeof(realloc) - 1)
+ if (prefix_len > MAX_ATOM_CHARACTERS + sizeof(realloc) - 1)
erl_exit(1,"Too long allocator name: %salloc\n",allctr->name_prefix);
memcpy((void *) buf, (void *) allctr->name_prefix, prefix_len);
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index 632d756481..185ac75d73 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -974,7 +974,7 @@ int enif_make_existing_atom_len(ErlNifEnv* env, const char* name, size_t len,
ERL_NIF_TERM* atom, ErlNifCharEncoding encoding)
{
ASSERT(encoding == ERL_NIF_LATIN1);
- return erts_atom_get(name, len, atom);
+ return erts_atom_get(name, len, atom, 1);
}
ERL_NIF_TERM enif_make_tuple(ErlNifEnv* env, unsigned cnt, ...)
@@ -1633,7 +1633,7 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2)
"this vm variant (%s).",
entry->vm_variant, ERL_NIF_VM_VARIANT);
}
- else if (!erts_is_atom_str((char*)entry->name, mod_atom)) {
+ else if (!erts_is_atom_str((char*)entry->name, mod_atom, 1)) {
ret = load_nif_error(BIF_P, bad_lib, "Library module name '%s' does not"
" match calling module '%T'", entry->name, mod_atom);
}
@@ -1643,7 +1643,7 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2)
for (i=0; i < entry->num_of_funcs && ret==am_ok; i++) {
BeamInstr** code_pp;
ErlNifFunc* f = &entry->funcs[i];
- if (!erts_atom_get(f->name, sys_strlen(f->name), &f_atom)
+ if (!erts_atom_get(f->name, sys_strlen(f->name), &f_atom, 1)
|| (code_pp = get_func_pp(mod->curr.code, f_atom, f->arity))==NULL) {
ret = load_nif_error(BIF_P,bad_lib,"Function not found %T:%s/%u",
mod_atom, f->name, f->arity);
@@ -1746,7 +1746,7 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2)
for (i=0; i < entry->num_of_funcs; i++)
{
BeamInstr* code_ptr;
- erts_atom_get(entry->funcs[i].name, sys_strlen(entry->funcs[i].name), &f_atom);
+ erts_atom_get(entry->funcs[i].name, sys_strlen(entry->funcs[i].name), &f_atom, 1);
code_ptr = *get_func_pp(mod->curr.code, f_atom, entry->funcs[i].arity);
if (code_ptr[1] == 0) {
diff --git a/erts/emulator/beam/erl_unicode.c b/erts/emulator/beam/erl_unicode.c
index 51559aea1c..e24b6f1458 100644
--- a/erts/emulator/beam/erl_unicode.c
+++ b/erts/emulator/beam/erl_unicode.c
@@ -1155,7 +1155,7 @@ BIF_RETTYPE unicode_characters_to_list_2(BIF_ALIST_2)
* a faster analyze and size count with this function.
*/
int erts_analyze_utf8(byte *source, Uint size,
- byte **err_pos, Uint *num_chars, int *left)
+ byte **err_pos, Uint *num_chars, int *left)
{
*err_pos = source;
*num_chars = 0;
@@ -1210,7 +1210,7 @@ int erts_analyze_utf8(byte *source, Uint size,
}
++(*num_chars);
*err_pos = source;
- if (left && --(*left) <= 0) {
+ if (left && --(*left) <= 0 && size) {
return ERTS_UTF8_ANALYZE_MORE;
}
}
@@ -1220,7 +1220,7 @@ int erts_analyze_utf8(byte *source, Uint size,
/*
* No errors should be able to occur - no overlongs, no malformed, no nothing
*/
-static Eterm do_utf8_to_list(Process *p, Uint num, byte *bytes, Uint sz,
+Eterm do_utf8_to_list(Process *p, Uint num, byte *bytes, Uint sz,
Uint left,
Uint *num_built, Uint *num_eaten, Eterm tail)
{
@@ -1812,31 +1812,36 @@ BIF_RETTYPE atom_to_binary_2(BIF_ALIST_2)
ap = atom_tab(atom_val(BIF_ARG_1));
if (BIF_ARG_2 == am_latin1) {
- BIF_RET(new_binary(BIF_P, ap->name, ap->len));
- } else if (BIF_ARG_2 == am_utf8 || BIF_ARG_2 == am_unicode) {
- int bin_size = 0;
int i;
Eterm bin_term;
- byte* bin_p;
-
- for (i = 0; i < ap->len; i++) {
- bin_size += (ap->name[i] >= 0x80) ? 2 : 1;
+ int bin_size = ap->len;
+
+ for (i = 0; i < ap->len; ) {
+ if (ap->name[i] < 0x80) i++;
+ else {
+ ASSERT(ap->name[i] >= 0xC0);
+ if (ap->name[i] < 0xE0) {
+ ASSERT(i+1 < ap->len && (ap->name[i+1] & 0xC0) == 0x80);
+ i += 2;
+ bin_size -= 1;
+ }
+ else goto error;
+ }
}
if (bin_size == ap->len) {
- BIF_RET(new_binary(BIF_P, ap->name, ap->len));
+ bin_term = new_binary(BIF_P, ap->name, ap->len);
}
- bin_term = new_binary(BIF_P, 0, bin_size);
- bin_p = binary_bytes(bin_term);
- for (i = 0; i < ap->len; i++) {
- byte b = ap->name[i];
- if (b < 0x80) {
- *bin_p++ = b;
- } else {
- *bin_p++ = 0xC0 | (b >> 6);
- *bin_p++ = 0x80 | (b & 0x3F);
- }
+ else {
+ byte* bin_p;
+ int dbg_sz;
+ bin_term = new_binary(BIF_P, 0, bin_size);
+ bin_p = binary_bytes(bin_term);
+ dbg_sz = erts_utf8_to_latin1(bin_p, ap->name, ap->len);
+ ASSERT(dbg_sz == bin_size); (void)dbg_sz;
}
BIF_RET(bin_term);
+ } else if (BIF_ARG_2 == am_utf8 || BIF_ARG_2 == am_unicode) {
+ BIF_RET(new_binary(BIF_P, ap->name, ap->len));
} else {
error:
BIF_ERROR(BIF_P, BADARG);
@@ -1856,102 +1861,52 @@ binary_to_atom(Process* p, Eterm bin, Eterm enc, int must_exist)
bin_size = binary_size(bin);
if (enc == am_latin1) {
Eterm a;
- if (bin_size > MAX_ATOM_LENGTH) {
+ if (bin_size > MAX_ATOM_CHARACTERS) {
system_limit:
erts_free_aligned_binary_bytes(temp_alloc);
BIF_ERROR(p, SYSTEM_LIMIT);
}
if (!must_exist) {
- a = am_atom_put((char *)bytes, bin_size);
+ a = am_atom_put2(bytes, bin_size, 1);
erts_free_aligned_binary_bytes(temp_alloc);
BIF_RET(a);
- } else if (erts_atom_get((char *)bytes, bin_size, &a)) {
+ } else if (erts_atom_get((char *)bytes, bin_size, &a, 1)) {
erts_free_aligned_binary_bytes(temp_alloc);
BIF_RET(a);
} else {
goto badarg;
}
} else if (enc == am_utf8 || enc == am_unicode) {
- char *buf;
- char *dst;
- int i;
- int num_chars;
Eterm res;
+ Uint num_chars = 0;
+ const byte* p = bytes;
+ Uint left = bin_size;
- if (bin_size > 2*MAX_ATOM_LENGTH) {
- byte* err_pos;
- Uint n;
- int reds_left = bin_size+1; /* Number of reductions left. */
-
- if (erts_analyze_utf8(bytes, bin_size, &err_pos,
- &n, &reds_left) == ERTS_UTF8_OK) {
- /*
- * Correct UTF-8 encoding, but too many characters to
- * fit in an atom.
- */
+ while (left) {
+ if (++num_chars > MAX_ATOM_CHARACTERS) {
goto system_limit;
- } else {
- /*
- * Something wrong in the UTF-8 encoding or Unicode code
- * points > 255.
- */
- goto badarg;
}
- }
-
- /*
- * Allocate a temporary buffer the same size as the binary,
- * so that we don't need an extra overflow test.
- */
- buf = (char *) erts_alloc(ERTS_ALC_T_TMP, bin_size);
- dst = buf;
- for (i = 0; i < bin_size; i++) {
- int c = bytes[i];
- if (c < 0x80) {
- *dst++ = c;
- } else if (i < bin_size-1) {
- int c2;
- if ((c & 0xE0) != 0xC0) {
- goto free_badarg;
- }
- i++;
- c = (c & 0x3F) << 6;
- c2 = bytes[i];
- if ((c2 & 0xC0) != 0x80) {
- goto free_badarg;
- }
- c = c | (c2 & 0x3F);
- if (0x80 <= c && c < 256) {
- *dst++ = c;
- } else {
- goto free_badarg;
- }
- } else {
- free_badarg:
- erts_free(ERTS_ALC_T_TMP, (void *) buf);
- goto badarg;
+ if ((p[0] & 0x80) == 0) {
+ ++p;
+ --left;
}
+ else if (left >= 2
+ && (p[0] & 0xFE) == 0xC2 /* only allow latin1 subset */
+ && (p[1] & 0xC0) == 0x80) {
+ p += 2;
+ left -= 2;
+ }
+ else goto badarg;
}
- num_chars = dst - buf;
- if (num_chars > MAX_ATOM_LENGTH) {
- erts_free(ERTS_ALC_T_TMP, (void *) buf);
- goto system_limit;
- }
+
if (!must_exist) {
- res = am_atom_put(buf, num_chars);
- erts_free(ERTS_ALC_T_TMP, (void *) buf);
- erts_free_aligned_binary_bytes(temp_alloc);
- BIF_RET(res);
- } else {
- int exists = erts_atom_get(buf, num_chars, &res);
- erts_free(ERTS_ALC_T_TMP, (void *) buf);
- if (exists) {
- erts_free_aligned_binary_bytes(temp_alloc);
- BIF_RET(res);
- } else {
- goto badarg;
- }
+ res = am_atom_put((char*)bytes, bin_size);
+ }
+ else if (!erts_atom_get((char*)bytes, bin_size, &res, 0)) {
+ goto badarg;
}
+ erts_free_aligned_binary_bytes(temp_alloc);
+ BIF_RET(res);
} else {
badarg:
erts_free_aligned_binary_bytes(temp_alloc);
@@ -2670,3 +2625,30 @@ BIF_RETTYPE file_native_name_encoding_0(BIF_ALIST_0)
}
}
+/* Assumes 'dest' has enough room.
+ */
+int erts_utf8_to_latin1(byte* dest, const byte* source, unsigned slen)
+{
+ byte* dp = dest;
+ while (slen > 0) {
+ if ((source[0] & 0x80) == 0) {
+ *dp++ = *source++;
+ --slen;
+ }
+ else if (slen > 1 &&
+ (source[0] & 0xFE) == 0xC2 &&
+ (source[1] & 0xC0) == 0x80) {
+ *dp++ = (char) ((source[0] << 6) | (source[1] & 0x3F));
+ source += 2;
+ slen -= 2;
+ }
+ else {
+ /* Just let unconvertable octets through. This should not happen
+ in a correctly upgraded system */
+ *dp++ = *source++;
+ --slen;
+ }
+ }
+ return dp - dest;
+}
+
diff --git a/erts/emulator/beam/external.c b/erts/emulator/beam/external.c
index 263ffc4eb3..68edcd0fa6 100644
--- a/erts/emulator/beam/external.c
+++ b/erts/emulator/beam/external.c
@@ -707,7 +707,7 @@ erts_prepare_dist_ext(ErtsDistExternal *edep,
if (cix >= ERTS_ATOM_CACHE_SIZE)
ERTS_EXT_HDR_FAIL;
ep++;
-#if MAX_ATOM_LENGTH > 255
+#if MAX_ATOM_CHARACTERS > 255
if (long_atoms) {
CHKSIZE(2);
len = get_int16(ep);
@@ -720,7 +720,7 @@ erts_prepare_dist_ext(ErtsDistExternal *edep,
len = get_int8(ep);
ep++;
}
- if (len > MAX_ATOM_LENGTH)
+ if (len > MAX_ATOM_CHARACTERS)
ERTS_EXT_HDR_FAIL; /* Too long atom */
CHKSIZE(len);
atom = am_atom_put((char *) ep, len);
@@ -1431,18 +1431,33 @@ enc_atom(ErtsAtomCacheMap *acmp, Eterm atom, byte *ep, Uint32 dflags)
if (iix < 0) {
i = atom_val(atom);
j = atom_tab(i)->len;
- if ((MAX_ATOM_LENGTH <= 255 || j <= 255)
- && (dflags & DFLAG_SMALL_ATOM_TAGS)) {
- *ep++ = SMALL_ATOM_EXT;
- put_int8(j, ep);
- ep++;
+ if (dflags & DFLAG_UTF8_ATOMS) {
+ if (j <= 255) {
+ *ep++ = ATOM_UTF8_EXT;
+ put_int16(j, ep);
+ ep += 2;
+ }
+ else {
+ *ep++ = SMALL_ATOM_UTF8_EXT;
+ put_int8(j, ep);
+ ep += 2;
+ }
+ sys_memcpy((char *) ep, (char*)atom_tab(i)->name, (int) j);
}
else {
- *ep++ = ATOM_EXT;
- put_int16(j, ep);
- ep += 2;
+ if (j <= 255 && (dflags & DFLAG_SMALL_ATOM_TAGS)) {
+ *ep++ = SMALL_ATOM_EXT;
+ j = erts_utf8_to_latin1(ep+1, atom_tab(i)->name, j);
+ put_int8(j, ep);
+ ep++;
+ }
+ else {
+ *ep++ = ATOM_EXT;
+ j = erts_utf8_to_latin1(ep+2, atom_tab(i)->name, j);
+ put_int16(j, ep);
+ ep += 2;
+ }
}
- sys_memcpy((char *) ep, (char*)atom_tab(i)->name, (int) j);
ep += j;
return ep;
}
@@ -1482,7 +1497,7 @@ static byte*
dec_atom(ErtsDistExternal *edep, byte* ep, Eterm* objp)
{
Uint len;
- int n;
+ int n, is_latin1;
switch (*ep++) {
case ATOM_CACHE_REF:
@@ -1498,17 +1513,29 @@ dec_atom(ErtsDistExternal *edep, byte* ep, Eterm* objp)
case ATOM_EXT:
len = get_int16(ep),
ep += 2;
+ is_latin1 = 1;
goto dec_atom_common;
case SMALL_ATOM_EXT:
len = get_int8(ep);
ep++;
+ is_latin1 = 1;
+ goto dec_atom_common;
+ case ATOM_UTF8_EXT:
+ len = get_int16(ep),
+ ep += 2;
+ is_latin1 = 0;
+ goto dec_atom_common;
+ case SMALL_ATOM_UTF8_EXT:
+ len = get_int8(ep),
+ ep++;
+ is_latin1 = 0;
dec_atom_common:
if (edep && (edep->flags & ERTS_DIST_EXT_BTT_SAFE)) {
- if (!erts_atom_get((char*)ep, len, objp)) {
+ if (!erts_atom_get((char*)ep, len, objp, is_latin1)) {
goto error;
}
} else {
- *objp = am_atom_put((char*)ep, len);
+ *objp = am_atom_put2(ep, len, is_latin1);
}
ep += len;
break;
@@ -2113,7 +2140,7 @@ static byte*
dec_term(ErtsDistExternal *edep, Eterm** hpp, byte* ep, ErlOffHeap* off_heap, Eterm* objp)
{
Eterm* hp_saved = *hpp;
- int n;
+ int n, is_latin1;
register Eterm* hp = *hpp; /* Please don't take the address of hp */
Eterm* next = objp;
@@ -2199,17 +2226,29 @@ dec_term(ErtsDistExternal *edep, Eterm** hpp, byte* ep, ErlOffHeap* off_heap, Et
case ATOM_EXT:
n = get_int16(ep);
ep += 2;
- goto dec_term_atom_common;
+ is_latin1 = 1;
+ goto dec_term_atom_common;
case SMALL_ATOM_EXT:
n = get_int8(ep);
ep++;
+ is_latin1 = 1;
+ goto dec_term_atom_common;
+ case ATOM_UTF8_EXT:
+ n = get_int16(ep);
+ ep += 2;
+ is_latin1 = 0;
+ goto dec_term_atom_common;
+ case SMALL_ATOM_UTF8_EXT:
+ n = get_int8(ep);
+ ep++;
+ is_latin1 = 0;
dec_term_atom_common:
if (edep && (edep->flags & ERTS_DIST_EXT_BTT_SAFE)) {
- if (!erts_atom_get((char*)ep, n, objp)) {
+ if (!erts_atom_get((char*)ep, n, objp, is_latin1)) {
goto error;
}
} else {
- *objp = am_atom_put((char*)ep, n);
+ *objp = am_atom_put2(ep, n, is_latin1);
}
ep += n;
break;
@@ -2879,14 +2918,15 @@ encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
}
else {
int alen = atom_tab(atom_val(obj))->len;
- if ((MAX_ATOM_LENGTH <= 255 || alen <= 255)
- && (dflags & DFLAG_SMALL_ATOM_TAGS)) {
- /* Make sure a SMALL_ATOM_EXT fits: SMALL_ATOM_EXT l t1 t2... */
- result += 1 + 1 + alen;
- }
- else {
- /* Make sure an ATOM_EXT fits: ATOM_EXT l1 l0 t1 t2... */
- result += 1 + 2 + alen;
+ result += 1 + 1 + alen;
+ if (dflags & DFLAG_UTF8_ATOMS) {
+ if (alen > 255) {
+ result++; /* ATOM_UTF8_EXT (not small) */
+ }
+ /*SVERK we use utf8 length which is an over estimation */
+ }
+ else if (alen > 255 || !(dflags & DFLAG_SMALL_ATOM_TAGS)) {
+ result++; /* ATOM_EXT (not small) */
}
insert_acache_map(acmp, obj);
}
@@ -3058,6 +3098,17 @@ encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
return result;
}
+static int is_valid_utf8_atom(byte* bytes, Uint nbytes)
+{
+ byte* err_pos;
+ Uint num_chars;
+
+ /*SVERK Do we really need to validate correct utf8? */
+ return nbytes <= MAX_ATOM_SZ_LIMIT
+ && erts_analyze_utf8(bytes, nbytes, &err_pos, &num_chars, NULL) == ERTS_UTF8_OK
+ && num_chars <= MAX_ATOM_CHARACTERS;
+}
+
static Sint
decoded_size(byte *ep, byte* endp, int internal_tags)
{
@@ -3125,21 +3176,41 @@ decoded_size(byte *ep, byte* endp, int internal_tags)
case ATOM_EXT:
CHKSIZE(2);
n = get_int16(ep);
- if (n > MAX_ATOM_LENGTH) {
+ if (n > MAX_ATOM_CHARACTERS) {
return -1;
}
SKIP(n+2+atom_extra_skip);
atom_extra_skip = 0;
break;
+ case ATOM_UTF8_EXT:
+ CHKSIZE(2);
+ n = get_int16(ep);
+ ep += 2;
+ if (!is_valid_utf8_atom(ep, n)) {
+ return -1;
+ }
+ SKIP(n+atom_extra_skip);
+ atom_extra_skip = 0;
+ break;
case SMALL_ATOM_EXT:
CHKSIZE(1);
n = get_int8(ep);
- if (n > MAX_ATOM_LENGTH) {
+ if (n > MAX_ATOM_CHARACTERS) {
return -1;
}
SKIP(n+1+atom_extra_skip);
atom_extra_skip = 0;
break;
+ case SMALL_ATOM_UTF8_EXT:
+ CHKSIZE(1);
+ n = get_int8(ep);
+ ep++;
+ if (!is_valid_utf8_atom(ep, n)) {
+ return -1;
+ }
+ SKIP(n+atom_extra_skip);
+ atom_extra_skip = 0;
+ break;
case ATOM_CACHE_REF:
SKIP(1+atom_extra_skip);
atom_extra_skip = 0;
diff --git a/erts/emulator/beam/external.h b/erts/emulator/beam/external.h
index eddd4571dd..50eea62225 100644
--- a/erts/emulator/beam/external.h
+++ b/erts/emulator/beam/external.h
@@ -51,6 +51,8 @@
#define NEW_FUN_EXT 'p'
#define EXPORT_EXT 'q'
#define FUN_EXT 'u'
+#define ATOM_UTF8_EXT 'v'
+#define SMALL_ATOM_UTF8_EXT 'w'
#define DIST_HEADER 'D'
#define ATOM_CACHE_REF 'R'
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 4c0d3421c8..1500424d3e 100755
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -1525,6 +1525,7 @@ char *erts_convert_filename_to_native(Eterm name, char *statbuf,
int allow_empty, int allow_atom,
Sint *used /* out */);
Eterm erts_convert_native_to_filename(Process *p, byte *bytes);
+int erts_utf8_to_latin1(byte* dest, const byte* source, unsigned slen);
#define ERTS_UTF8_OK 0
#define ERTS_UTF8_INCOMPLETE 1
#define ERTS_UTF8_ERROR 2
diff --git a/erts/emulator/test/bif_SUITE.erl b/erts/emulator/test/bif_SUITE.erl
index e2442861c7..02c6de8cb1 100644
--- a/erts/emulator/test/bif_SUITE.erl
+++ b/erts/emulator/test/bif_SUITE.erl
@@ -481,8 +481,6 @@ binary_to_atom(Config) when is_list(Config) ->
%% Bad UTF8 sequences.
?line ?BADARG(binary_to_atom(id(<<255>>), utf8)),
?line ?BADARG(binary_to_atom(id(<<255,0>>), utf8)),
- ?line ?BADARG(binary_to_atom(id(<<0:512/unit:8,255>>), utf8)),
- ?line ?BADARG(binary_to_atom(id(<<0:512/unit:8,255,0>>), utf8)),
?line ?BADARG(binary_to_atom(id(<<16#C0,16#80>>), utf8)), %Overlong 0.
?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) ||
C <- lists:seq(256, 16#D7FF)],
@@ -494,6 +492,8 @@ binary_to_atom(Config) when is_list(Config) ->
C <- lists:seq(16#90000, 16#10FFFF)],
%% system_limit failures.
+ ?line ?SYS_LIMIT(binary_to_atom(id(<<0:512/unit:8,255>>), utf8)),
+ ?line ?SYS_LIMIT(binary_to_atom(id(<<0:512/unit:8,255,0>>), utf8)),
?line ?SYS_LIMIT(binary_to_atom(<<0:256/unit:8>>, latin1)),
?line ?SYS_LIMIT(binary_to_atom(<<0:257/unit:8>>, latin1)),
?line ?SYS_LIMIT(binary_to_atom(<<0:512/unit:8>>, latin1)),
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 01:02:26 +0000