I am using GNU 11.3.0. I had some issues with clang

Code is in examples/embedded-c++/main.cpp. Will use this to enter the Query function

Built duckdb with debug mode: GEN=ninja make debug in the root directory of the project Go to examples/embedded-c++ and in CMakeLists.txt use the debug duckdb build:

-link_directories(../../build/release/src)
+link_directories(../../build/debug/src)

Then, in the Makefile under examples/embedded-c++ compile example.cpp with the debug flag:

 duckdb:
-       cd ../.. && make
+       cd ../.. && GEN=ninja make debug DISABLE_SANITIZER=1

 main:
        mkdir -p build
-       cd build &&  cmake -DCMAKE_BUILD_TYPE=Debug .. && make
+       cd build &&  cmake -DENABLE_SANITIZER=FALSE -DENABLE_UBSAN=0 -DCMAKE_BUILD_TYPE=Debug .. && make
        build/example

Now run gdb with gdb build/example

(May not need this step anymore after explicitly disabling the sanitizer) Need to set LD_PRELOAD to libasan shared object in gdb (gdb) set environment LD_PRELOAD /usr/lib/x86_64-linux-gnu/libasan.so.6

I think that if I enable the sanitizer, need to make sure to enable it in both the compilation of duckdb and in my main.cpp in example. But I didn’t try this

Now, set the breakpoint, and run and step into the code.

When I ended up in something like common/unique_ptr.hpp or something from the c++ standard library, if I kept stepping through with s, it would not go deeper into the function. I needed to use finish to get out of that function, and then I was able to keep going in the function that I was in see: https://stackoverflow.com/a/43166815

Example:

• breakpoint at

auto result = con.Query("SELECT * FROM integers");

• run gdb
• I wanted to step into con.Query and then inside that function I wanted to continue on and step into context->Query(query, false);

16		auto result = con.Query("SELECT * FROM integers");
(gdb) s
(gdb) n
unique_ptr<MaterializedQueryResult> Connection::Query(const string &query)
91		auto result = context->Query(query, false);
duckdb::shared_ptr<duckdb::ClientContext, true>::operator-> (this=0x7fffffffdc80) at ../duckdb/src/include/duckdb/common/shared_ptr_ipp.hpp:206
206				const auto ptr = internal.get();
(gdb) finish

• Here I needed to use finish and not n when the debugger was in the shared_ptr_ipp.hpp code, in order to continue on. If I kept using n it would not go deeper into the function and into context->Query

91		auto result = context->Query(query, false);
Value returned is $1 = (duckdb::ClientContext *) 0x61600004bf90

• Now I was able to continue stepping deeper into the function

(gdb) s
920	unique_ptr<QueryResult> ClientContext::Query(const string &query, bool allow_stream_result) {

extra

Compiling with clang

I needed to add this to CMakeLists.txt:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address")

To get definitions working with clangd in neovim

Run GEN=ninja make clangd