diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a3f3e8..41f8622 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,18 +1,22 @@
+# v6
++ `build_profile` task was split to `profile` and `gprof`
++ added task `sanitize`
+
 # v5
-+ added task clean
-+ added task exec_dbg
-+ added task build_profile
-+ added -flto optimization to build_exec task
-+ added -fprofile-use to build_exec task
++ added task `clean`
++ added task `exec_dbg`
++ added task `build_profile`
++ added `-flto` optimization to `build_exec` task
++ added `-fprofile-use` to `build_exec` task
 + removed default configs loading in `init.sh`, now reads just line with version from `cbuild/default.config` and `default.config` 
-+ OBJDIR structure changed
++ `OBJDIR` structure changed
 + added error on unknown task in config
-+ makefile now writes logs to make_raw.log
-+ added makefile task fix_log
++ makefile now writes logs to `make_raw.log`
++ added makefile task `fix_log`
 + new comments in scripts and Makefile 
 + wrapped arguments with quots in scripts
-+ now u should add CPP_ARGS to LINKER_ARGS manually
-+ added error(msg) function to functions.sh
-+ replaced printf calls with myprint in scripts
-+ added default .gitignore
-+ added *.log to .gitignore
++ now you have to add `CPP_ARGS` to `LINKER_ARGS` manually
++ added `error(msg)` function to `functions.sh`
++ replaced `printf` calls with `myprint` in scripts
++ added default `.gitignore`
++ added *.log to `.gitignore`
diff --git a/default.Makefile b/default.Makefile
index 7f1ba15..0bd17cd 100644
--- a/default.Makefile
+++ b/default.Makefile
@@ -4,12 +4,8 @@
 
 all: build_exec_dbg
 
-# generates different profile info
-build_profile:
-	@cbuild/call_task.sh build_profile 2>&1 | tee make_raw.log
-
-# creates executable using profile info generated by build_profile
-build_exec: build_profile
+# creates executable using profiling info generated by profile
+build_exec: profile
 	@cbuild/call_task.sh build_exec  2>&1 | tee -a make_raw.log
 
 # creates executable with debug info and no optimizations
@@ -48,6 +44,19 @@ exec_dbg: build_exec_dbg
 valgrind: build_exec_dbg
 	@cbuild/call_task.sh valgrind 2>&1 | tee -a make_raw.log
 
+# generates profiling info
+profile:
+	@cbuild/call_task.sh profile 2>&1 | tee make_raw.log
+
+# compiles program with -pg and runs it with gprof
+# uses gprof2dot python script to generate function call tree  
+gprof:
+	@cbuild/call_task.sh gprof 2>&1 | tee make_raw.log
+	
+# compiles executable with sanitizers and executes it to find errors and warnings
+sanitize:
+	@cbuild/call_task.sh sanitize 2>&1 | tee make_raw.log
+
 ######################################
 ######       Other tasks       #######
 ######################################
diff --git a/default.config b/default.config
index ddeee6b..0b46216 100644
--- a/default.config
+++ b/default.config
@@ -1,18 +1,18 @@
 #!/bin/bash
-CBUILD_VERSION=5
+CBUILD_VERSION=6
 CONFIG_VERSION=1
 
 PROJECT="NULL"
-CMP_C=gcc
-CMP_CPP=g++
-STD_C=c11
-STD_CPP=c++17
-WARN_C="-Wall -Wno-discarded-qualifiers"
-WARN_CPP="-Wall"
+CMP_C="gcc"
+CMP_CPP="g++"
+STD_C="c11"
+STD_CPP="c++11"
+WARN_C="-Wall -Wno-discarded-qualifiers -Wextra -Wno-unused-parameter"
+WARN_CPP="-Wall -Wextra -Wno-unused-parameter"
 SRC_C="$(    find src -name '*.c')"
 SRC_CPP="$(  find src -name '*.cpp')"
-#TESTS_C="$(  find tests -name '*.c')"
-#TESTS_CPP="$(find tests -name '*.cpp')"
+TESTS_C="$(  find tests -name '*.c')"
+TESTS_CPP="$(find tests -name '*.cpp')"
 
 # OBJDIR structure:
 #  ├── objects  - dir where compiled *.o files are stored. cleans every call of build task
@@ -40,26 +40,13 @@ esac
 
 # TASKS
 case "$TASK" in
-    # generates different profile info
-    build_profile)
-        OUTDIR="$OUTDIR/profile"
-        # -flto applies more optimizations across object files
-        # -flto=auto is needed to multithreaded copilation
-        # -fuse-linker-plugin is required to use static libs with lto, it strips away all
-        # -pg adds code to executable, that generates file containing function call info (gmon.out)
-        # -fprofile-generate 
-        C_ARGS="-O2 -flto=auto -fuse-linker-plugin -pg -fprofile-generate -fprofile-prefix-path=$(realpath $OBJDIR)/objects"
-        CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
-        PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
-        TASK_SCRIPT=cbuild/default_tasks/profile.sh
-        POST_TASK_SCRIPT=
-        ;;
-    # creates executable using profile info generated by build_profile
+    # creates executable using profiling info if it exists
     build_exec)
         # -flto applies more optimizations across object files
         # -flto=auto is needed to multithreaded copilation
-        # -fuse-linker-plugin is required to use static libs with lto, it strips away all
+        # -fuse-linker-plugin is required to use static libs with lto
+        # -fprofile-use enables compiler to use profiling info files to optimize executable
+        # -fprofile-prefix-path sets path where profiling info about objects are be saved
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-use -fprofile-prefix-path=$(realpath $OBJDIR)/objects"
         CPP_ARGS="$C_ARGS"
         LINKER_ARGS="$CPP_ARGS"
@@ -69,7 +56,7 @@ case "$TASK" in
         ;;
     # creates executable with debug info and no optimizations
     build_exec_dbg)
-        C_ARGS="-O0 -g"
+        C_ARGS="-O0 -g3"
         CPP_ARGS="$C_ARGS"
         LINKER_ARGS="$CPP_ARGS"
         PRE_TASK_SCRIPT=
@@ -87,7 +74,7 @@ case "$TASK" in
         ;;
     # creates shared library with debug symbols and no optimizations
     build_shared_lib_dbg)
-        C_ARGS="-O0 -g -fpic -shared"
+        C_ARGS="-O0 -g3 -fpic -shared"
         CPP_ARGS="$C_ARGS"
         LINKER_ARGS="$CPP_ARGS -Wl,-soname,$SHARED_LIB_FILE"
         PRE_TASK_SCRIPT=
@@ -104,7 +91,7 @@ case "$TASK" in
         ;;
     # creates static library with debug symbols and no optimizations
     build_static_lib_dbg)
-        C_ARGS="-O0 -g"
+        C_ARGS="-O0 -g3"
         CPP_ARGS="$C_ARGS"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_static_lib.sh
@@ -119,6 +106,45 @@ case "$TASK" in
         VALGRIND_ARGS="-s --log-file=valgrind.log --read-var-info=yes --track-origins=yes --fullpath-after=$PROJECT/ --leak-check=full --show-leak-kinds=all" 
         TASK_SCRIPT=cbuild/default_tasks/valgrind.sh
         ;;
+    # generates profiling info
+    profile)
+        OUTDIR="$OUTDIR/profile"
+        # -flto applies more optimizations across object files
+        # -flto=auto is needed to multithreaded copilation
+        # -fuse-linker-plugin is required to use static libs with lto
+        # -pg adds code to executable, that generates file containing function call info (gmon.out)
+        # -fprofile-generate generates executable with profiling code
+        # -fprofile-prefix-path sets path where profiling info about objects will be saved
+        C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-generate -fprofile-prefix-path=$(realpath $OBJDIR)/objects"
+        CPP_ARGS="$C_ARGS"
+        LINKER_ARGS="$CPP_ARGS"
+        PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
+        TASK_SCRIPT=cbuild/default_tasks/profile.sh
+        POST_TASK_SCRIPT=
+        ;;
+    # compiles program with -pg and runs it with gprof
+    # uses gprof2dot python script to generate function call tree (pip install gprof2dot)
+    # requires graphviz (https://www.graphviz.org/download/source/)
+    gprof)
+        OUTDIR="$OUTDIR/gprof"
+        # -pg adds code to executable, that generates file containing function call info (gmon.out)
+        C_ARGS="-O2 -flto=auto -fuse-linker-plugin -pg"
+        CPP_ARGS="$C_ARGS"
+        LINKER_ARGS="$CPP_ARGS"
+        PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
+        TASK_SCRIPT=cbuild/default_tasks/gprof.sh
+        POST_TASK_SCRIPT=
+        ;;
+    # compiles executable with sanitizers and executes it to find errors and warnings
+    sanitize)
+        OUTDIR="bin/sanitize"
+        C_ARGS="-O0 -g3 -fsanitize=undefined,address"
+        CPP_ARGS="$C_ARGS"
+        LINKER_ARGS="$CPP_ARGS"
+        PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
+        TASK_SCRIPT=cbuild/default_tasks/exec.sh
+        POST_TASK_SCRIPT=
+        ;;
     # deletes generated files
     clean)
         TASK_SCRIPT=cbuild/default_tasks/clean.sh
diff --git a/default_tasks/build_exec.sh b/default_tasks/build_exec.sh
index 094b0ba..8908ab3 100755
--- a/default_tasks/build_exec.sh
+++ b/default_tasks/build_exec.sh
@@ -8,6 +8,7 @@ prof_files=$(find "$OBJDIR/profile/" -name '*.gcda')
 if [ -z "$prof_files" ]; then
     myprint "${YELLOW}no profiling info found"
 else
+    myprint "${GREEN}profiling info found"
     for prof_file in $prof_files; do
         myprint "${GRAY}$(basename $prof_file)"
         cp $prof_file "$OBJDIR/objects/"
diff --git a/default_tasks/gprof.sh b/default_tasks/gprof.sh
new file mode 100644
index 0000000..edcc59e
--- /dev/null
+++ b/default_tasks/gprof.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+cd "$OUTDIR"
+
+# deleting all files except excutable
+echo "$(find . ! -name $EXEC_FILE -type f -delete)"
+
+# executing file compiled with -pg
+myprint "${BLUE}executing $OUTDIR/$EXEC_FILE"
+./$EXEC_FILE > exec.log
+myprint "${GREEN}execution log saved to ${CYAN}$OUTDIR/exec.log"
+
+# generating function call graph
+myprint "${BLUE}generating function call graph..."
+gprof ./$EXEC_FILE > gprof.log
+gprof2dot gprof.log > gprof2dot.graph
+dot gprof2dot.graph -Tpng -Gdpi=300 -o gprof2dot.png
+myprint "${GREEN}function call graph saved to ${CYAN}$OUTDIR/gprof2dot.png"
+
+cd ../..
diff --git a/default_tasks/profile.sh b/default_tasks/profile.sh
index 06473a4..39be355 100644
--- a/default_tasks/profile.sh
+++ b/default_tasks/profile.sh
@@ -5,7 +5,7 @@ cd "$OUTDIR"
 # deleting all files except excutable
 echo "$(find . ! -name $EXEC_FILE -type f -delete)"
 
-# executing file compiled with -pg and -fprofile-gen
+# executing file compiled with -fprofile-gen
 myprint "${BLUE}executing $OUTDIR/$EXEC_FILE"
 ./$EXEC_FILE > exec.log
 myprint "${GREEN}execution log saved to ${CYAN}$OUTDIR/exec.log"
@@ -15,11 +15,4 @@ clean_dir ../../$OBJDIR/profile
 mv ../../$OBJDIR/objects/*.gcda ../../$OBJDIR/profile/
 myprint "${GREEN}$(ls ../../$OBJDIR/profile | wc -l) *.gcda profiling files have written to $OBJDIR/profile"
 
-# generating function call graph
-myprint "${BLUE}generating function call graph..."
-gprof ./$EXEC_FILE > gprof.log
-gprof2dot gprof.log > gprof2dot.graph
-dot gprof2dot.graph -Tpng -Gdpi=300 -o gprof2dot.png
-myprint "${GREEN}function call graph saved to ${CYAN}$OUTDIR/gprof2dot.png"
-
 cd ../..