| Commit message (Collapse) | Author | Age |
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When receiving strings *from* msgpack, we don't need to duplicate/free since
the data only lives in the msgpack parse buffer until the end of the call.
But in order to reuse `msgpack_rpc_free_object` when sending event data(which is
sent *to* msgpack), Strings must be freed, which means they must also be
allocated separately.
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Relates to issue #760
These coverity warnings are of the form:
>>> CID 62602: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes...
This is caused by strncpy not alway NULL-terminated the destination buffer
(for example in the case where strlen(src) >= size(dst)). It's better to
replace that with (x)strlcpy, which always NULL-terminates.
Most of these are related to the set_api_error macro, which uses strncpy.
The error struct is used (for example) in msgpack_rpc_error, where strlen is
executed on it, so it needs to be NULL-terminated. (x)strlcpy, unlike
strncpy, always NULL-terminates the destination buffer.
Relevant parts of the coverity report:
*** CID 62602: Buffer not null terminated (BUFFER_SIZE_WARNING)
/src/nvim/api/vim.c: 236 in vim_set_current_buffer()
230 if (try_end(err)) {
231 return;
232 }
233
234 char msg[256];
235 snprintf(msg, sizeof(msg),
"failed to switch to buffer %d", (int)buffer);
>>> CID 62602: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes on
>>> destination array "err->msg" of size 256 bytes might leave the
>>> destination string unterminated.
236 set_api_error(msg, err);
237 return;
238 }
239
240 try_end(err);
241 }
*** CID 62603: Buffer not null terminated (BUFFER_SIZE_WARNING)
/src/nvim/api/private/helpers.c: 70 in try_end()
64 } else if (msg_list != NULL && *msg_list != NULL) {
65 int should_free;
66 char *msg = (char *)get_exception_string(*msg_list,
67 ET_ERROR,
68 NULL,
69 &should_free);
>>> CID 62603: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes on
>>> destination array "err->msg" of size 256 bytes might leave the
>>> destination string unterminated.
70 strncpy(err->msg, msg, sizeof(err->msg));
71 err->set = true;
72 free_global_msglist();
73
74 if (should_free) {
75 free(msg);
/src/nvim/api/private/helpers.c: 78 in try_end()
72 free_global_msglist();
73
74 if (should_free) {
75 free(msg);
76 }
77 } else if (did_throw) {
>>> CID 62603: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes on
>>> destination array "err->msg" of size 256 bytes might leave the
>>> destination string unterminated.
78 set_api_error((char *)current_exception->value, err);
79 }
80
81 return err->set;
82 }
83
*** CID 62604: Buffer not null terminated (BUFFER_SIZE_WARNING)
/src/nvim/api/private/helpers.c: 592 in set_option_value_err()
586 opt_flags)))
587 {
588 if (try_end(err)) {
589 return;
590 }
591
>>> CID 62604: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes on
>>> destination array "err->msg" of size 256 bytes might leave the
>>> destination string unterminated.
592 set_api_error(errmsg, err);
593 }
*** CID 62605: Buffer not null terminated (BUFFER_SIZE_WARNING)
/src/nvim/os/server.c: 114 in server_start()
108 if (addr_len > sizeof(ip) - 1) {
109 // Maximum length of a ip address buffer is 15(eg: 255.255.255.255)
110 addr_len = sizeof(ip);
111 }
112
113 // Extract the address part
>>> CID 62605: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 16 bytes on
>>> destination array "ip" of size 16 bytes might leave the destination
>>> string unterminated.
114 strncpy(ip, addr, addr_len);
115
116 int port = NEOVIM_DEFAULT_TCP_PORT;
117
118 if (*ip_end == ':') {
119 char *port_end;
/src/nvim/os/server.c: 88 in server_start()
82
83 void server_start(char *endpoint, ChannelProtocol prot)
84 {
85 char addr[ADDRESS_MAX_SIZE];
86
87 // Trim to `ADDRESS_MAX_SIZE`
>>> CID 62605: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes on
>>> destination array "addr" of size 256 bytes might leave the
>>> destination string unterminated.
88 strncpy(addr, endpoint, sizeof(addr));
89
90 // Check if the server already exists
91 if (map_has(cstr_t)(servers, addr)) {
92 EMSG2("Already listening on %s", addr);
93 return;
*** CID 62606: Buffer not null terminated (BUFFER_SIZE_WARNING)
/src/nvim/os/server.c: 186 in server_stop()
180 void server_stop(char *endpoint)
181 {
182 Server *server;
183 char addr[ADDRESS_MAX_SIZE];
184
185 // Trim to `ADDRESS_MAX_SIZE`
>>> CID 62606: Buffer not null terminated (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 256 bytes on
>>> destination array "addr" of size 256 bytes might leave the
>>> destination string unterminated.
187
188 if ((server = map_get(cstr_t)(servers, addr)) == NULL) {
189 EMSG2("Not listening on %s", addr);
190 return;
191 }
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- Define specialized arrays for each remote object type
- Implement msgpack_rpc functions for dealing with the new types
- Refactor all functions dealing with buffers, windows and tabpages to
return/accept handles instead of list indexes.
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- Add macros supporting typed arrays in the remote API
- Refactor StringArray-related functions on top of the new macros
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- Extract remote types definitions into a macro
- Extract msgpack_rpc helper functions for remote types into a macro
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- Add the 'handle' field to `tabpage_T`
- Add declare/implement functions for registering/unregistering/retrieving
tabpages
- Register/unregister tabpages when they are created/destroyed.
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- Add the 'handle' field to `win_T`
- Add declare/implement functions for registering/unregistering/retrieving
windows
- Register/unregister windows when they are created/destroyed.
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- Add the 'handle' field to `buf_T`
- Add declare/implement functions for registering/unregistering/retrieving
buffers
- Register/unregister buffers when they are created/destroyed.
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This module will be used to implement remote management of objects through the
API. Object types to be registered must have a `uint64_t` field named 'handle'.
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Also check that the string length is not equal or greater than MAXPATHL.
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While the mb_string2cells function accepts a length parameter, it only seems to
work properly with 0-terminated strings, since valgrind reports a conditional
jump that depends on uninitialized values(means it reads after the string
boundaries which could result in overflows or wrong results)
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Now the map.c module is used to implement the 'lookup set' for that function
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Use it in buffers.c
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Instead of exposing native C types to a public API that can be consumed by other
platforms, we are now using the following translation:
int64_t -> Integer
double -> Float
bool -> Boolean
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This should make the API simpler, and int64_t is enough to represent any integer
value we might need.
Range checks should be done inside the API functions, that way we can modify the
types of the actual fields/variables modified by the API without changes to the
API prototypes.
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Change define guards from NEOVIM_XXX_H to NVIM_XXX_H:
- Change header files.
- Change clint correct guard name calculation.
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Prepend 'nvim/' in all project-local (non-system) includes.
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Problem: Some newly introduced files used includes relative to the
current file, both of the form `include "../XXX.h"` and
`include "XXX.h"`.
Preferred form is relative to include root (src/ in our case).
Solution: Change includes to preferred form.
Note: This is also done to ease next commit (prepend 'nvim/ to all
project-local includes).
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Move files from src/ to src/nvim/.
- src/nvim/ becomes the new root dir for nvim executable sources.
- src/libnvim/ is planned to become root dir of the neovim library.
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