test: Add cake static analyser.

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        tool: [autotools, clang-tidy, compcert, cppcheck, doxygen, goblint, infer, freebsd, misra, modules, pkgsrc, rpm, slimcc, sparse, tcc, tokstyle]
+        tool: [autotools, cake, clang-tidy, compcert, cppcheck, doxygen, goblint, infer, freebsd, misra, modules, pkgsrc, rpm, slimcc, sparse, tcc, tokstyle]
     runs-on: ubuntu-latest
     steps:
       - name: Set up Docker Buildx

other/docker/cake/cake.Dockerfile

@@ -0,0 +1,74 @@
+FROM alpine:3.19.0 AS cake
+
+RUN ["apk", "add", "--no-cache", \
+ "clang", \
+ "compiler-rt", \
+ "gdb", \
+ "git", \
+ "libsodium-dev", \
+ "libvpx-dev", \
+ "linux-headers", \
+ "llvm", \
+ "musl-dev", \
+ "opus-dev", \
+ "util-linux-dev"]
+
+WORKDIR /src/workspace/cake
+ARG CAKE_COMMIT="b725baa328206cb8a11776b470255cec8efcb170"
+RUN ["git", "clone", "https://github.com/thradams/cake", "/src/workspace/cake"]
+RUN git checkout "$CAKE_COMMIT"
+
+WORKDIR /src/workspace/cake/src
+RUN sed -i \
+ -e 's/ -Wall / -DNDEBUG -std=gnu2x -Wall -Wno-multichar -Wno-int-conversion -Wno-unused-but-set-variable -Wno-incompatible-pointer-types-discards-qualifiers -Wno-unused-function -Wno-return-type -Werror -static -ggdb3 /' \
+ -e 's/RUN "amalgamator.exe/"echo amalgamator.exe/' \
+ build.c \
+ && clang -DDEBUG build.c -o build \
+ && ./build
+
+ENV CAKEFLAGS="-D__x86_64__ -I/src/workspace/cake/src/include -I/src/workspace/cake/src -I/usr/include"
+#ENV CAKEFLAGS="-D__x86_64__ -I/src/workspace/cake/src/include -I/src/workspace/cake/src -I/usr/include -fanalyzer -Wno-analyzer-maybe-uninitialized"
+
+WORKDIR /src/workspace/c-toxcore
+COPY . /src/workspace/c-toxcore/
+
+RUN for i in toxcore/*.c; do \
+    echo "$i"; \
+    OUT="$(/src/workspace/cake/src/cake $CAKEFLAGS "$i")"; \
+    echo "$OUT"; \
+    if echo "$OUT" | grep "warning:" >/dev/null; then exit 1; fi; \
+    if echo "$OUT" | grep " 0 files" >/dev/null; then exit 1; fi; \
+  done
+
+# For creduce:
+#FROM ubuntu:22.04
+#
+#ENV DEBIAN_FRONTEND="noninteractive"
+#RUN apt-get update \
+# && apt-get install -y --no-install-recommends \
+# creduce \
+# gdb \
+# libopus-dev \
+# libsodium-dev \
+# libvpx-dev \
+# linux-libc-dev \
+# musl-dev \
+# && apt-get clean \
+# && rm -rf /var/lib/apt/lists/*
+#
+#SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+#
+#COPY --from=cake /src/workspace/cake/src/ /src/workspace/cake/src/
+#
+#WORKDIR /src/workspace/c-toxcore
+#COPY . /src/workspace/c-toxcore/
+#
+#ENV CAKEFLAGS="-Wno-conditional-constant -D__x86_64__ -I/src/workspace/cake/src/include -I/src/workspace/cake/src -I/usr/include/x86_64-linux-musl -I/usr/include"
+#
+##RUN /src/workspace/cake/src/cake $CAKEFLAGS -E toxcore/DHT.c | grep -Ev '^(Cake|/| [01])' >crash.c
+#RUN cp toxcore/test.c crash.c
+#RUN other/docker/cake/creduce.sh
+#RUN creduce other/docker/cake/creduce.sh crash.c \
+# || creduce other/docker/cake/creduce.sh crash.c
+#
+#RUN gdb -ex r -ex bt --args /src/workspace/cake/src/cake -fanalyzer crash.c

other/docker/cake/cake.Dockerfile.dockerignore

@@ -0,0 +1,25 @@
+# ===== common =====
+# Ignore everything ...
+**/*
+# ... except sources
+!**/*.[ch]
+!**/*.cc
+!**/*.hh
+!CHANGELOG.md
+!LICENSE
+!README.md
+!auto_tests/data/*
+!other/bootstrap_daemon/bash-completion/**
+!other/bootstrap_daemon/tox-bootstrapd.*
+!other/proxy/*.mod
+!other/proxy/*.sum
+!other/proxy/*.go
+# ... and CMake build files (used by most builds).
+!**/CMakeLists.txt
+!.github/scripts/flags*.sh
+!cmake/*.cmake
+!other/pkgconfig/*
+!other/rpm/*
+!so.version
+# ===== custom =====
+!other/docker/cake/creduce.sh

other/docker/cake/creduce.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+WARNINGS=(-std=c99 -Wall -Wno-return-type -Wno-unused -Werror)
+
+if ! gcc "${WARNINGS[@]}" -I/src/workspace/c-toxcore/toxcore -I/usr/include/x86_64-linux-musl -fsyntax-only crash.c; then
+  exit 1
+fi
+/src/workspace/cake/src/cake -I/src/workspace/c-toxcore/toxcore -I/src/workspace/cake/src/include -I/src/workspace/cake/src -fanalyzer crash.c
+if [ $? != 139 ]; then
+  exit 1
+fi

other/docker/cake/dockerignore

@@ -0,0 +1,2 @@
+# ===== custom =====
+!other/docker/cake/creduce.sh

other/docker/cake/run

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+. "$(cd "$(dirname "${BASH_SOURCE[0]}")/../sources" && pwd)/run.sh"

toxcore/DHT.c

@@ -110,10 +110,10 @@ struct DHT {
     uint8_t self_public_key[CRYPTO_PUBLIC_KEY_SIZE];
     uint8_t self_secret_key[CRYPTO_SECRET_KEY_SIZE];
 
-    DHT_Friend    *friends_list;
+    DHT_Friend    *owner friends_list;
     uint16_t       num_friends;
 
-    Node_format   *loaded_nodes_list;
+    Node_format   *owner loaded_nodes_list;
     uint32_t       loaded_num_nodes;
     unsigned int   loaded_nodes_index;
 
@@ -370,7 +370,7 @@ int dht_create_packet(const Memory *mem, const Random *rng,
                       uint8_t *packet, size_t length)
 {
     uint8_t nonce[CRYPTO_NONCE_SIZE];
-    uint8_t *encrypted = (uint8_t *)mem_balloc(mem, plain_length + CRYPTO_MAC_SIZE);
+    uint8_t *owner encrypted = (uint8_t *owner)mem_balloc(mem, plain_length + CRYPTO_MAC_SIZE);
 
     if (encrypted == nullptr) {
         return -1;
@@ -920,7 +920,7 @@ static void sort_client_list(const Memory *mem, Client_data *list, uint64_t cur_
 {
     // Pass comp_public_key to qsort with each Client_data entry, so the
     // comparison function can use it as the base of comparison.
-    DHT_Cmp_Data *cmp_list = (DHT_Cmp_Data *)mem_valloc(mem, length, sizeof(DHT_Cmp_Data));
+    DHT_Cmp_Data *owner cmp_list = (DHT_Cmp_Data *owner)mem_valloc(mem, length, sizeof(DHT_Cmp_Data));
 
     if (cmp_list == nullptr) {
         return;
@@ -1591,13 +1591,14 @@ int dht_addfriend(DHT *dht, const uint8_t *public_key, dht_ip_cb *ip_callback,
         return 0;
     }
 
-    DHT_Friend *const temp = (DHT_Friend *)mem_vrealloc(dht->mem, dht->friends_list, dht->num_friends + 1, sizeof(DHT_Friend));
+    bool ok;
+    dht->friends_list =
+        (DHT_Friend *owner)mem_vresize(dht->mem, dht->friends_list, dht->num_friends + 1, sizeof(DHT_Friend), &ok);
 
-    if (temp == nullptr) {
+    if (!ok) {
         return -1;
     }
 
-    dht->friends_list = temp;
     DHT_Friend *const dht_friend = &dht->friends_list[dht->num_friends];
     *dht_friend = empty_dht_friend;
     memcpy(dht_friend->public_key, public_key, CRYPTO_PUBLIC_KEY_SIZE);
@@ -1641,13 +1642,14 @@ int dht_delfriend(DHT *dht, const uint8_t *public_key, uint32_t lock_token)
         return 0;
     }
 
-    DHT_Friend *const temp = (DHT_Friend *)mem_vrealloc(dht->mem, dht->friends_list, dht->num_friends, sizeof(DHT_Friend));
+    bool ok;
+    dht->friends_list =
+        (DHT_Friend *owner)mem_vresize(dht->mem, dht->friends_list, dht->num_friends, sizeof(DHT_Friend), &ok);
 
-    if (temp == nullptr) {
+    if (!ok) {
         return -1;
     }
 
-    dht->friends_list = temp;
     return 0;
 }
 
@@ -1694,8 +1696,10 @@ static uint8_t do_ping_and_sendnode_requests(DHT *dht, uint64_t *lastgetnode, co
     const uint64_t temp_time = mono_time_get(dht->mono_time);
 
     uint32_t num_nodes = 0;
-    Client_data **client_list = (Client_data **)mem_valloc(dht->mem, list_count * 2, sizeof(Client_data *));
-    IPPTsPng **assoc_list = (IPPTsPng **)mem_valloc(dht->mem, list_count * 2, sizeof(IPPTsPng *));
+    Client_data **owner client_list =
+        (Client_data **owner)mem_valloc(dht->mem, list_count * 2, sizeof(Client_data *));
+    IPPTsPng **owner assoc_list =
+        (IPPTsPng **owner)mem_valloc(dht->mem, list_count * 2, sizeof(IPPTsPng *));
     unsigned int sort = 0;
     bool sort_ok = false;
 
@@ -2513,15 +2517,16 @@ static int handle_lan_discovery(void *object, const IP_Port *source, const uint8
 
 /*----------------------------------------------------------------------------------*/
 
-DHT *new_dht(const Logger *log, const Memory *mem, const Random *rng, const Network *ns,
-             Mono_Time *mono_time, Networking_Core *net,
-             bool hole_punching_enabled, bool lan_discovery_enabled)
+DHT *owner new_dht(
+    const Logger *log, const Memory *mem, const Random *rng, const Network *ns,
+    Mono_Time *mono_time, Networking_Core *net,
+    bool hole_punching_enabled, bool lan_discovery_enabled)
 {
     if (net == nullptr) {
         return nullptr;
     }
 
-    DHT *const dht = (DHT *)mem_alloc(mem, sizeof(DHT));
+    DHT *const owner dht = (DHT *owner)mem_alloc(mem, sizeof(DHT));
 
     if (dht == nullptr) {
         LOGGER_ERROR(log, "failed to allocate DHT struct (%ld bytes)", (unsigned long)sizeof(DHT));
@@ -2620,7 +2625,7 @@ void do_dht(DHT *dht)
     ping_iterate(dht->ping);
 }
 
-void kill_dht(DHT *dht)
+void kill_dht(DHT *owner dht)
 {
     if (dht == nullptr) {
         return;
@@ -2693,7 +2698,8 @@ void dht_save(const DHT *dht, uint8_t *data)
     /* get right offset. we write the actual header later. */
     data = state_write_section_header(data, DHT_STATE_COOKIE_TYPE, 0, 0);
 
-    Node_format *clients = (Node_format *)mem_valloc(dht->mem, MAX_SAVED_DHT_NODES, sizeof(Node_format));
+    Node_format *owner clients =
+        (Node_format *owner)mem_valloc(dht->mem, MAX_SAVED_DHT_NODES, sizeof(Node_format));
 
     if (clients == nullptr) {
         LOGGER_ERROR(dht->log, "could not allocate %u nodes", MAX_SAVED_DHT_NODES);
@@ -2790,7 +2796,8 @@ static State_Load_Status dht_load_state_callback(void *outer, const uint8_t *dat
             mem_delete(dht->mem, dht->loaded_nodes_list);
 
             // Copy to loaded_clients_list
-            Node_format *nodes = (Node_format *)mem_valloc(dht->mem, MAX_SAVED_DHT_NODES, sizeof(Node_format));
+            Node_format *owner nodes =
+                (Node_format *owner)mem_valloc(dht->mem, MAX_SAVED_DHT_NODES, sizeof(Node_format));
 
             if (nodes == nullptr) {
                 LOGGER_ERROR(dht->log, "could not allocate %u nodes", MAX_SAVED_DHT_NODES);

toxcore/DHT.h

@@ -463,11 +463,12 @@ int dht_load(DHT *dht, const uint8_t *data, uint32_t length);
 
 /** Initialize DHT. */
 non_null()
-DHT *new_dht(const Logger *log, const Memory *mem, const Random *rng, const Network *ns,
-             Mono_Time *mono_time, Networking_Core *net, bool hole_punching_enabled, bool lan_discovery_enabled);
+DHT *owner new_dht(
+    const Logger *log, const Memory *mem, const Random *rng, const Network *ns,
+    Mono_Time *mono_time, Networking_Core *net, bool hole_punching_enabled, bool lan_discovery_enabled);
 
 nullable(1)
-void kill_dht(DHT *dht);
+void kill_dht(DHT *owner dht);
 
 /**
  * @retval false if we are not connected to the DHT.

toxcore/LAN_discovery.c

@@ -53,15 +53,15 @@ struct Broadcast_Info {
 #if defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
 
 non_null()
-static Broadcast_Info *fetch_broadcast_info(const Network *ns)
+static Broadcast_Info *owner fetch_broadcast_info(const Network *ns)
 {
-    Broadcast_Info *broadcast = (Broadcast_Info *)calloc(1, sizeof(Broadcast_Info));
+    Broadcast_Info *owner broadcast = (Broadcast_Info *owner)calloc(1, sizeof(Broadcast_Info));
 
     if (broadcast == nullptr) {
         return nullptr;
     }
 
-    IP_ADAPTER_INFO *adapter_info = (IP_ADAPTER_INFO *)malloc(sizeof(IP_ADAPTER_INFO));
+    IP_ADAPTER_INFO *owner adapter_info = (IP_ADAPTER_INFO *owner)malloc(sizeof(IP_ADAPTER_INFO));
 
     if (adapter_info == nullptr) {
         free(broadcast);
@@ -72,7 +72,7 @@ static Broadcast_Info *fetch_broadcast_info(const Network *ns)
 
     if (GetAdaptersInfo(adapter_info, &out_buf_len) == ERROR_BUFFER_OVERFLOW) {
         free(adapter_info);
-        IP_ADAPTER_INFO *new_adapter_info = (IP_ADAPTER_INFO *)malloc(out_buf_len);
+        IP_ADAPTER_INFO *owner new_adapter_info = (IP_ADAPTER_INFO *owner)malloc(out_buf_len);
 
         if (new_adapter_info == nullptr) {
             free(broadcast);
@@ -122,9 +122,9 @@ static Broadcast_Info *fetch_broadcast_info(const Network *ns)
 #elif !defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && (defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__))
 
 non_null()
-static Broadcast_Info *fetch_broadcast_info(const Network *ns)
+static Broadcast_Info *owner fetch_broadcast_info(const Network *ns)
 {
-    Broadcast_Info *broadcast = (Broadcast_Info *)calloc(1, sizeof(Broadcast_Info));
+    Broadcast_Info *owner broadcast = (Broadcast_Info *owner)calloc(1, sizeof(Broadcast_Info));
 
     if (broadcast == nullptr) {
         return nullptr;
@@ -197,9 +197,9 @@ static Broadcast_Info *fetch_broadcast_info(const Network *ns)
 #else // TODO(irungentoo): Other platforms?
 
 non_null()
-static Broadcast_Info *fetch_broadcast_info(const Network *ns)
+static Broadcast_Info *owner fetch_broadcast_info(const Network *ns)
 {
-    return (Broadcast_Info *)calloc(1, sizeof(Broadcast_Info));
+    return (Broadcast_Info *owner)calloc(1, sizeof(Broadcast_Info));
 }
 
 #endif /* platforms */
@@ -375,12 +375,12 @@ bool lan_discovery_send(const Networking_Core *net, const Broadcast_Info *broadc
     return res;
 }
 
-Broadcast_Info *lan_discovery_init(const Network *ns)
+Broadcast_Info *owner lan_discovery_init(const Network *ns)
 {
     return fetch_broadcast_info(ns);
 }
 
-void lan_discovery_kill(Broadcast_Info *broadcast)
+void lan_discovery_kill(Broadcast_Info *owner broadcast)
 {
     free(broadcast);
 }

toxcore/LAN_discovery.h

@@ -32,13 +32,13 @@ bool lan_discovery_send(const Networking_Core *net, const Broadcast_Info *broadc
  * Discovers broadcast devices and IP addresses.
  */
 non_null()
-Broadcast_Info *lan_discovery_init(const Network *ns);
+Broadcast_Info *owner lan_discovery_init(const Network *ns);
 
 /**
  * Free all resources associated with the broadcast info.
  */
 nullable(1)
-void lan_discovery_kill(Broadcast_Info *broadcast);
+void lan_discovery_kill(Broadcast_Info *owner broadcast);
 
 /**
  * Is IP a local ip or not.