api: Allow blacklist functions that shouldn't be accesible from eval

Blacklist deprecated functions and functions depending on channel_id

scripts/gendispatch.lua

@@ -37,6 +37,7 @@ c_proto = Ct(
   Cg(Cc(false), 'async') *
   (fill * Cg((P('FUNC_API_ASYNC') * Cc(true)), 'async') ^ -1) *
   (fill * Cg((P('FUNC_API_NOEXPORT') * Cc(true)), 'noexport') ^ -1) *
+  (fill * Cg((P('FUNC_API_NOEVAL') * Cc(true)), 'noeval') ^ -1) *
   fill * P(';')
   )
 grammar = Ct((c_proto + c_comment + c_preproc + ws) ^ 1)

scripts/geneval.lua

@@ -25,12 +25,14 @@ local gperfpipe = io.open(funcsfname .. '.gperf', 'wb')
 local funcs = require('eval').funcs
 local metadata = mpack.unpack(io.open(arg[3], 'rb'):read("*all"))
 for i,fun in ipairs(metadata) do
+  if not fun.noeval then
     funcs['api_'..fun.name] = {
       args=#fun.parameters,
       func='api_wrapper',
       data='&handle_'..fun.name,
     }
   end
+end
 
 local funcsdata = io.open(funcs_file, 'w')
 funcsdata:write(mpack.pack(funcs))

src/nvim/api/buffer.c

@@ -56,6 +56,7 @@ Integer buffer_line_count(Buffer buffer, Error *err)
 /// @param[out] err Details of an error that may have occurred
 /// @return The line string
 String buffer_get_line(Buffer buffer, Integer index, Error *err)
+    FUNC_API_NOEVAL
 {
   String rv = { .size = 0 };
 
@@ -84,6 +85,7 @@ String buffer_get_line(Buffer buffer, Integer index, Error *err)
 /// @param line The new line.
 /// @param[out] err Details of an error that may have occurred
 void buffer_set_line(Buffer buffer, Integer index, String line, Error *err)
+    FUNC_API_NOEVAL
 {
   Object l = STRING_OBJ(line);
   Array array = { .items = &l, .size = 1 };
@@ -102,6 +104,7 @@ void buffer_set_line(Buffer buffer, Integer index, String line, Error *err)
 /// @param index The line index
 /// @param[out] err Details of an error that may have occurred
 void buffer_del_line(Buffer buffer, Integer index, Error *err)
+    FUNC_API_NOEVAL
 {
   Array array = ARRAY_DICT_INIT;
   index = convert_index(index);
@@ -127,6 +130,7 @@ ArrayOf(String) buffer_get_line_slice(Buffer buffer,
                                       Boolean include_start,
                                       Boolean include_end,
                                       Error *err)
+    FUNC_API_NOEVAL
 {
   start = convert_index(start) + !include_start;
   end = convert_index(end) + include_end;
@@ -235,6 +239,7 @@ void buffer_set_line_slice(Buffer buffer,
                            Boolean include_end,
                            ArrayOf(String) replacement,
                            Error *err)
+    FUNC_API_NOEVAL
 {
   start = convert_index(start) + !include_start;
   end = convert_index(end) + include_end;
@@ -590,6 +595,7 @@ void buffer_insert(Buffer buffer,
                    Integer lnum,
                    ArrayOf(String) lines,
                    Error *err)
+    FUNC_API_NOEVAL
 {
   // "lnum" will be the index of the line after inserting,
   // no matter if it is negative or not

src/nvim/api/ui.c

@@ -48,6 +48,7 @@ void remote_ui_disconnect(uint64_t channel_id)
 
 void nvim_ui_attach(uint64_t channel_id, Integer width, Integer height,
                     Dictionary options, Error *err)
+    FUNC_API_NOEVAL
 {
   if (pmap_has(uint64_t)(connected_uis, channel_id)) {
     api_set_error(err, Exception, _("UI already attached for channel"));
@@ -117,6 +118,7 @@ void ui_attach(uint64_t channel_id, Integer width, Integer height,
 }
 
 void nvim_ui_detach(uint64_t channel_id, Error *err)
+    FUNC_API_NOEVAL
 {
   if (!pmap_has(uint64_t)(connected_uis, channel_id)) {
     api_set_error(err, Exception, _("UI is not attached for channel"));
@@ -133,6 +135,7 @@ void ui_detach(uint64_t channel_id, Error *err)
 
 void nvim_ui_try_resize(uint64_t channel_id, Integer width,
                         Integer height, Error *err)
+    FUNC_API_NOEVAL
 {
   if (!pmap_has(uint64_t)(connected_uis, channel_id)) {
     api_set_error(err, Exception, _("UI is not attached for channel"));
@@ -159,7 +162,9 @@ void ui_try_resize(uint64_t channel_id, Integer width,
 }
 
 void nvim_ui_set_option(uint64_t channel_id, String name,
-                        Object value, Error *error) {
+                        Object value, Error *error)
+    FUNC_API_NOEVAL
+{
   if (!pmap_has(uint64_t)(connected_uis, channel_id)) {
     api_set_error(error, Exception, _("UI is not attached for channel"));
     return;

src/nvim/api/vim.c

@@ -583,6 +583,7 @@ void vim_set_current_tabpage(Tabpage tabpage, Error *err)
 /// @param channel_id The channel id (passed automatically by the dispatcher)
 /// @param event The event type string
 void vim_subscribe(uint64_t channel_id, String event)
+    FUNC_API_NOEVAL
 {
   size_t length = (event.size < METHOD_MAXLEN ? event.size : METHOD_MAXLEN);
   char e[METHOD_MAXLEN + 1];
@@ -596,6 +597,7 @@ void vim_subscribe(uint64_t channel_id, String event)
 /// @param channel_id The channel id (passed automatically by the dispatcher)
 /// @param event The event type string
 void vim_unsubscribe(uint64_t channel_id, String event)
+    FUNC_API_NOEVAL
 {
   size_t length = (event.size < METHOD_MAXLEN ?
                    event.size :
@@ -624,7 +626,7 @@ Dictionary vim_get_color_map(void)
 
 
 Array vim_get_api_info(uint64_t channel_id)
-    FUNC_API_ASYNC
+    FUNC_API_ASYNC FUNC_API_NOEVAL
 {
   Array rv = ARRAY_DICT_INIT;
 

src/nvim/func_attr.h

@@ -185,6 +185,7 @@
 #ifdef DEFINE_FUNC_ATTRIBUTES
 # define FUNC_API_ASYNC
 # define FUNC_API_NOEXPORT
+# define FUNC_API_NOEVAL
 # define FUNC_ATTR_MALLOC REAL_FATTR_MALLOC
 # define FUNC_ATTR_ALLOC_SIZE(x) REAL_FATTR_ALLOC_SIZE(x)
 # define FUNC_ATTR_ALLOC_SIZE_PROD(x, y) REAL_FATTR_ALLOC_SIZE_PROD(x, y)