chore: Add a profiling flag to cmake.

CMakeLists.txt

@@ -169,6 +169,8 @@ if(MSVC)
   endif()
 endif()
 
+option(ENABLE_PROFILING "Use libprofiler for profiling tests" OFF)
+
 include(Dependencies)
 
 if(MUST_BUILD_TOXAV)

auto_tests/CMakeLists.txt

@@ -28,6 +28,10 @@ function(auto_test target)
   elseif(TARGET Threads::Threads)
     target_link_libraries(auto_${target}_test PRIVATE Threads::Threads)
   endif()
+  if(ENABLE_PROFILING)
+    target_link_libraries(auto_${target}_test PRIVATE PkgConfig::LIBPROFILER)
+    target_compile_definitions(auto_${target}_test PRIVATE "ENABLE_PROFILING")
+  endif()
   add_test(NAME ${target} COMMAND ${CROSSCOMPILING_EMULATOR} auto_${target}_test)
   set_tests_properties(${target} PROPERTIES TIMEOUT "${TEST_TIMEOUT_SECONDS}")
   # add the source dir as environment variable, so the testdata can be found

auto_tests/send_message_test.c

@@ -5,6 +5,10 @@
 #include <stdint.h>
 #include <string.h>
 
+#ifdef ENABLE_PROFILING
+#include <gperftools/profiler.h>
+#endif
+
 typedef struct State {
     bool message_received;
 } State;
@@ -63,6 +67,10 @@ int main(void)
 {
     setvbuf(stdout, nullptr, _IONBF, 0);
 
+#ifdef ENABLE_PROFILING
+    ProfilerStart("send_message_test.prof");
+#endif
+
     struct Tox_Options *tox_options = tox_options_new(nullptr);
     ck_assert(tox_options != nullptr);
 
@@ -76,5 +84,9 @@ int main(void)
 
     tox_options_free(tox_options);
 
+#ifdef ENABLE_PROFILING
+    ProfilerStop();
+#endif
+
     return 0;
 }

cmake/Dependencies.cmake

@@ -34,3 +34,8 @@ endif()
 
 # For tox-bootstrapd.
 pkg_search_module(LIBCONFIG   libconfig IMPORTED_TARGET)
+
+# For profiling.
+if(ENABLE_PROFILING)
+  pkg_search_module(LIBPROFILER libprofiler IMPORTED_TARGET REQUIRED)
+endif()

other/docker/prof/Dockerfile

@@ -0,0 +1,34 @@
+FROM toxchat/c-toxcore:sources AS src
+FROM golang:1.18-alpine AS build
+
+ENV LANG=en_US.UTF-8 \
+    LANGUAGE=en_US.UTF-8 \
+    LC_CTYPE=en_US.UTF-8 \
+    LC_ALL=en_US.UTF-8
+
+RUN ["go", "install", "github.com/google/pprof@latest"]
+RUN ["apk", "add", "--no-cache", \
+ "--repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing/", \
+ "binutils", \
+ "clang", \
+ "cmake", \
+ "gcc", \
+ "gperftools-dev", \
+ "graphviz", \
+ "libsodium-dev", \
+ "libvpx-dev", \
+ "linux-headers", \
+ "musl-dev", \
+ "opus-dev", \
+ "pkgconfig", \
+ "samurai"]
+WORKDIR /work
+COPY --from=src /src/ /work/
+RUN cmake -B_build -H. -GNinja -DAUTOTEST=ON -DENABLE_SHARED=OFF -DENABLE_PROFILING=ON -DCMAKE_EXE_LINKER_FLAGS="-dynamic"
+RUN cmake --build _build
+RUN CPUPROFILE_FREQUENCY=4000 \
+    CPUPROFILE=auto_test.prof \
+    _build/auto_tests/auto_send_message_test
+
+ENV PPROF_BINARY_PATH=/work/_build/auto_tests
+CMD ["pprof", "-http", "0.0.0.0:80", "_build/auto_tests/auto_send_message_test", "auto_test.prof"]

other/docker/prof/run

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -eux
+
+docker build -t toxchat/c-toxcore:sources -f other/docker/sources/Dockerfile .
+docker build -t toxchat/c-toxcore:prof -f other/docker/prof/Dockerfile .
+docker run --name toxcore-prof --rm -it -p "28192:80" toxchat/c-toxcore:prof