 build: Add symbol versions to all exported symbols
With this version script, newly-linked binaries that depend on the
json-c shared library will refer to its symbols in a versioned form,
preventing their references from being resolved to a symbol of the same
name exported by json-glib or libjansson if those libraries appear in
dependency search order before json-c, which will usually result in
a crash. This is necessary because ELF symbol resolution normally uses
a single flat namespace, not a tree like Windows symbol resolution.
At least one symbol (json_object_iter_next()) is exported by all three
JSON libraries.
Linking with -Bsymbolic is not enough to have this effect in all cases,
because -Bsymbolic only affects symbol lookup within a shared object,
for example when json_object_set_serializer() calls
json_object_set_userdata(). It does not affect calls from external
code into json-c, unless json-c was statically linked into the
external caller.
This change will also not prevent code that depends on json-glib or
libjansson from finding json-c's symbols and crashing; to prevent
that, a corresponding change in json-glib or libjansson would be needed.
Adding a symbol-version is a backwards-compatible change, but once
added, removing or changing the symbol-version on a symbol would be an
incompatible change that requires a SONAME bump.
Resolves: https://github.com/json-c/json-c/issues/621
(when combined with an equivalent change to libjansson).
Signed-off-by: Simon McVittie <smcv@collabora.com>
5 years ago build: Add symbol versions to all exported symbols
With this version script, newly-linked binaries that depend on the
json-c shared library will refer to its symbols in a versioned form,
preventing their references from being resolved to a symbol of the same
name exported by json-glib or libjansson if those libraries appear in
dependency search order before json-c, which will usually result in
a crash. This is necessary because ELF symbol resolution normally uses
a single flat namespace, not a tree like Windows symbol resolution.
At least one symbol (json_object_iter_next()) is exported by all three
JSON libraries.
Linking with -Bsymbolic is not enough to have this effect in all cases,
because -Bsymbolic only affects symbol lookup within a shared object,
for example when json_object_set_serializer() calls
json_object_set_userdata(). It does not affect calls from external
code into json-c, unless json-c was statically linked into the
external caller.
This change will also not prevent code that depends on json-glib or
libjansson from finding json-c's symbols and crashing; to prevent
that, a corresponding change in json-glib or libjansson would be needed.
Adding a symbol-version is a backwards-compatible change, but once
added, removing or changing the symbol-version on a symbol would be an
incompatible change that requires a SONAME bump.
Resolves: https://github.com/json-c/json-c/issues/621
(when combined with an equivalent change to libjansson).
Signed-off-by: Simon McVittie <smcv@collabora.com>
5 years ago |
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170 |
-
- /*
- * Symbol versioning for libjson-c.
- * All exported symbols must be listed here.
- *
- * See
- * https://software.intel.com/sites/default/files/m/a/1/e/dsohowto.pdf
- */
-
- /*
- * Symbols in JSONC_PRIVATE are exported for historical
- * reasons, but should not be used outside of json-c.
- */
- JSONC_PRIVATE {
- array_list_add;
- array_list_del_idx;
- array_list_free;
- array_list_new;
- array_list_put_idx;
- array_list_sort;
- json_hex_chars;
- json_parse_double;
- json_parse_int64;
- json_parse_uint64;
- lh_table_delete;
- lh_table_delete_entry;
- lh_table_free;
- lh_table_insert;
- lh_table_insert_w_hash;
- lh_table_new;
- lh_table_resize;
- mc_debug;
- mc_error;
- mc_get_debug;
- mc_info;
- mc_set_debug;
- mc_set_syslog;
- printbuf_free;
- printbuf_memappend;
- printbuf_memset;
- printbuf_new;
- printbuf_reset;
- sprintbuf;
- };
-
- JSONC_0.14 {
- global:
- array_list_bsearch;
- array_list_get_idx;
- array_list_length;
- json_c_get_random_seed;
- json_c_object_sizeof;
- json_c_set_serialization_double_format;
- json_c_shallow_copy_default;
- json_c_version;
- json_c_version_num;
- json_c_visit;
- json_global_set_string_hash;
- json_number_chars;
- json_object_array_add;
- json_object_array_bsearch;
- json_object_array_del_idx;
- json_object_array_get_idx;
- json_object_array_length;
- json_object_array_put_idx;
- json_object_array_sort;
- json_object_deep_copy;
- json_object_double_to_json_string;
- json_object_equal;
- json_object_free_userdata;
- json_object_from_fd;
- json_object_from_fd_ex;
- json_object_from_file;
- json_object_get;
- json_object_get_array;
- json_object_get_boolean;
- json_object_get_double;
- json_object_get_int64;
- json_object_get_int;
- json_object_get_object;
- json_object_get_string;
- json_object_get_string_len;
- json_object_get_type;
- json_object_get_uint64;
- json_object_get_userdata;
- json_object_int_inc;
- json_object_is_type;
- json_object_iter_begin;
- json_object_iter_end;
- json_object_iter_equal;
- json_object_iter_init_default;
- json_object_iter_next;
- json_object_iter_peek_name;
- json_object_iter_peek_value;
- json_object_new_array;
- json_object_new_boolean;
- json_object_new_double;
- json_object_new_double_s;
- json_object_new_int64;
- json_object_new_int;
- json_object_new_null;
- json_object_new_object;
- json_object_new_string;
- json_object_new_string_len;
- json_object_new_uint64;
- json_object_object_add;
- json_object_object_add_ex;
- json_object_object_del;
- json_object_object_get;
- json_object_object_get_ex;
- json_object_object_length;
- json_object_put;
- json_object_set_boolean;
- json_object_set_double;
- json_object_set_int64;
- json_object_set_int;
- json_object_set_serializer;
- json_object_set_string;
- json_object_set_string_len;
- json_object_set_uint64;
- json_object_set_userdata;
- json_object_to_fd;
- json_object_to_file;
- json_object_to_file_ext;
- json_object_to_json_string;
- json_object_to_json_string_ext;
- json_object_to_json_string_length;
- json_object_userdata_to_json_string;
- json_pointer_get;
- json_pointer_getf;
- json_pointer_set;
- json_pointer_setf;
- json_tokener_error_desc;
- json_tokener_free;
- json_tokener_get_error;
- json_tokener_get_parse_end;
- json_tokener_new;
- json_tokener_new_ex;
- json_tokener_parse;
- json_tokener_parse_ex;
- json_tokener_parse_verbose;
- json_tokener_reset;
- json_tokener_set_flags;
- json_type_to_name;
- json_util_get_last_err;
- lh_char_equal;
- lh_kchar_table_new;
- lh_kptr_table_new;
- lh_ptr_equal;
- lh_table_length;
- lh_table_lookup_entry;
- lh_table_lookup_entry_w_hash;
- lh_table_lookup_ex;
-
- local:
- *;
- };
-
- JSONC_0.15 {
- global:
- array_list_new2;
- array_list_shrink;
- json_object_array_shrink;
- json_object_new_array_ext;
- } JSONC_0.14;
-
- JSONC_0.16 {
- # global:
- # ...new symbols here...
- } JSONC_0.15;
|
