feat core: add gdb coroutines unwinder

Benchmark results:
```
Benchmarking utask cmd for tasks_cnt=100 threads_cnt=8 memory_per_task=1000:
`utask list` (first call) time: 0.343 s
`utask list` (second call) time: 0.001 s
`utask apply all bt` (first call) time: 1.126 s
`utask apply all bt` (second call) time: 0.915 s
Benchmarking utask cmd for tasks_cnt=100 threads_cnt=8 memory_per_task=10000000:
`utask list` (first call) time: 0.321 s
`utask list` (second call) time: 0.001 s
`utask apply all bt` (first call) time: 1.098 s
`utask apply all bt` (second call) time: 0.873 s
Benchmarking utask cmd for tasks_cnt=500 threads_cnt=32 memory_per_task=1000000:
`utask list` (first call) time: 1.531 s
`utask list` (second call) time: 0.004 s
`utask apply all bt` (first call) time: 5.381 s
`utask apply all bt` (second call) time: 4.405 s
Benchmarking utask cmd for tasks_cnt=1000 threads_cnt=32 memory_per_task=100000:
`utask list` (first call) time: 3.161 s
`utask list` (second call) time: 0.007 s
`utask apply all bt` (first call) time: 11.124 s
`utask apply all bt` (second call) time: 9.036 s
Benchmarking utask cmd for tasks_cnt=2000 threads_cnt=32 memory_per_task=100000:
`utask list` (first call) time: 6.319 s
`utask list` (second call) time: 0.013 s
`utask apply all bt` (first call) time: 21.829 s
`utask apply all bt` (second call) time: 17.738 s
```

Tests: протестировано в CI
commit_hash:1d9a6e55c91a86540b2c19f35d36288abb645791

Author: UNEXPECTEDsemicolon

.mapping.json

@@ -1288,6 +1288,8 @@
   "core/src/dynamic_config/value_test.cpp":"taxi/uservices/userver/core/src/dynamic_config/value_test.cpp",
   "core/src/engine/condition_variable.cpp":"taxi/uservices/userver/core/src/engine/condition_variable.cpp",
   "core/src/engine/condition_variable_test.cpp":"taxi/uservices/userver/core/src/engine/condition_variable_test.cpp",
+  "core/src/engine/coro/marked_allocator.cpp":"taxi/uservices/userver/core/src/engine/coro/marked_allocator.cpp",
+  "core/src/engine/coro/marked_allocator.hpp":"taxi/uservices/userver/core/src/engine/coro/marked_allocator.hpp",
   "core/src/engine/coro/pool.cpp":"taxi/uservices/userver/core/src/engine/coro/pool.cpp",
   "core/src/engine/coro/pool.hpp":"taxi/uservices/userver/core/src/engine/coro/pool.hpp",
   "core/src/engine/coro/pool_config.cpp":"taxi/uservices/userver/core/src/engine/coro/pool_config.cpp",
@@ -3841,20 +3843,27 @@
   "scripts/docs/scripts/toc.js":"taxi/uservices/userver/scripts/docs/scripts/toc.js",
   "scripts/docs/upload_docs.sh":"taxi/uservices/userver/scripts/docs/upload_docs.sh",
   "scripts/gdb/gen_gdb_printers.py":"taxi/uservices/userver/scripts/gdb/gen_gdb_printers.py",
+  "scripts/gdb/include/pretty_printers/third_party/moodycamel/extractor.hpp":"taxi/uservices/userver/scripts/gdb/include/pretty_printers/third_party/moodycamel/extractor.hpp",
+  "scripts/gdb/pretty_printers/cmd/utask/cmd.py":"taxi/uservices/userver/scripts/gdb/pretty_printers/cmd/utask/cmd.py",
   "scripts/gdb/pretty_printers/formats/__init__.py":"taxi/uservices/userver/scripts/gdb/pretty_printers/formats/__init__.py",
   "scripts/gdb/pretty_printers/formats/json/__init__.py":"taxi/uservices/userver/scripts/gdb/pretty_printers/formats/json/__init__.py",
   "scripts/gdb/pretty_printers/formats/json/printers.py":"taxi/uservices/userver/scripts/gdb/pretty_printers/formats/json/printers.py",
   "scripts/gdb/pretty_printers/formats/yaml/__init__.py":"taxi/uservices/userver/scripts/gdb/pretty_printers/formats/yaml/__init__.py",
+  "scripts/gdb/pretty_printers/third_party/moodycamel/printers.py":"taxi/uservices/userver/scripts/gdb/pretty_printers/third_party/moodycamel/printers.py",
   "scripts/gdb/tests/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/CMakeLists.txt",
   "scripts/gdb/tests/gen_gdb_printers_tests.py":"taxi/uservices/userver/scripts/gdb/tests/gen_gdb_printers_tests.py",
+  "scripts/gdb/tests/include/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/include/CMakeLists.txt",
   "scripts/gdb/tests/include/userver/gdb_tests/stub.hpp":"taxi/uservices/userver/scripts/gdb/tests/include/userver/gdb_tests/stub.hpp",
   "scripts/gdb/tests/src/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/CMakeLists.txt",
+  "scripts/gdb/tests/src/cmd/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/cmd/CMakeLists.txt",
+  "scripts/gdb/tests/src/cmd/utask/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/cmd/utask/CMakeLists.txt",
+  "scripts/gdb/tests/src/cmd/utask/gdb_test_utask.cpp":"taxi/uservices/userver/scripts/gdb/tests/src/cmd/utask/gdb_test_utask.cpp",
   "scripts/gdb/tests/src/formats/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/formats/CMakeLists.txt",
   "scripts/gdb/tests/src/formats/json/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/formats/json/CMakeLists.txt",
   "scripts/gdb/tests/src/formats/json/gdb_test_json.cpp":"taxi/uservices/userver/scripts/gdb/tests/src/formats/json/gdb_test_json.cpp",
-  "scripts/gdb/tests/src/formats/json/ya.make":"taxi/uservices/userver/scripts/gdb/tests/src/formats/json/ya.make",
-  "scripts/gdb/tests/src/formats/ya.make":"taxi/uservices/userver/scripts/gdb/tests/src/formats/ya.make",
-  "scripts/gdb/tests/src/ya.make":"taxi/uservices/userver/scripts/gdb/tests/src/ya.make",
+  "scripts/gdb/tests/src/third_party/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/third_party/CMakeLists.txt",
+  "scripts/gdb/tests/src/third_party/moodycamel/CMakeLists.txt":"taxi/uservices/userver/scripts/gdb/tests/src/third_party/moodycamel/CMakeLists.txt",
+  "scripts/gdb/tests/src/third_party/moodycamel/gdb_test_moodycamel.cpp":"taxi/uservices/userver/scripts/gdb/tests/src/third_party/moodycamel/gdb_test_moodycamel.cpp",
   "scripts/gdb/tests/test_printers.py":"taxi/uservices/userver/scripts/gdb/tests/test_printers.py",
   "scripts/gdb/update_gdbinit.py":"taxi/uservices/userver/scripts/gdb/update_gdbinit.py",
   "scripts/grpc/__init__.py":"taxi/uservices/userver/scripts/grpc/__init__.py",

cmake/GenGdbPrinters.cmake

@@ -3,13 +3,13 @@ include_guard(GLOBAL)
 include("${CMAKE_CURRENT_LIST_DIR}/UserverCodegenTarget.cmake")
 include("${CMAKE_CURRENT_LIST_DIR}/UserverVenv.cmake")
 
-function(gen_gdb_printers TARGET STRUCTURE)
+function(_gen_gdb_impl TARGET STRUCTURE FILENAME)
   # Set the path to the Python script
-  set(PRINTER_PYTHON_SCRIPT "${USERVER_ROOT_DIR}/scripts/gdb/pretty_printers/${STRUCTURE}/printers.py")
+  set(PRINTER_PYTHON_SCRIPT "${USERVER_ROOT_DIR}/scripts/gdb/pretty_printers/${STRUCTURE}/${FILENAME}.py")
   set(GDB_AUTOGEN_DIR "${CMAKE_CURRENT_BINARY_DIR}/gdb_autogen")
 
   # Set the output header file path in the build directory
-  set(OUTPUT_HEADER "${GDB_AUTOGEN_DIR}/gdb_autogen/${STRUCTURE}/printers.hpp")
+  set(OUTPUT_HEADER "${GDB_AUTOGEN_DIR}/gdb_autogen/${STRUCTURE}/${FILENAME}.hpp")
 
   # Create the output directory if it doesn't exist
   get_filename_component(OUTPUT_HEADER_DIR "${OUTPUT_HEADER}" DIRECTORY)
@@ -32,5 +32,16 @@ function(gen_gdb_printers TARGET STRUCTURE)
   # Add the generated header to the target's sources
   target_sources(${TARGET} PRIVATE "${OUTPUT_HEADER}")
 
-  target_include_directories(${TARGET} PRIVATE "${GDB_AUTOGEN_DIR}")
+  target_include_directories(${TARGET}
+    PRIVATE "${GDB_AUTOGEN_DIR}"
+    PRIVATE "${USERVER_ROOT_DIR}/scripts/gdb/include"
+  )
+endfunction()
+
+function(gen_gdb_printers TARGET STRUCTURE)
+  _gen_gdb_impl(${TARGET} ${STRUCTURE} "printers")
+endfunction()
+
+function(gen_gdb_cmd TARGET STRUCTURE)
+  _gen_gdb_impl(${TARGET} ${STRUCTURE} "cmd")
 endfunction()

core/CMakeLists.txt

@@ -80,6 +80,10 @@ add_library(${PROJECT_NAME} STATIC ${SOURCES})
 # that migrates coroutines between threads.
 target_compile_definitions(${PROJECT_NAME} PUBLIC MOODYCAMEL_NO_THREAD_LOCAL)
 
+include(GenGdbPrinters)
+gen_gdb_printers(${PROJECT_NAME} "third_party/moodycamel")
+gen_gdb_cmd(${PROJECT_NAME} "cmd/utask")
+
 if (USERVER_DISABLE_PHDR_CACHE)
   target_compile_definitions(${PROJECT_NAME} PRIVATE USERVER_DISABLE_PHDR_CACHE)
 endif()

core/include/userver/tracing/span.hpp

@@ -221,6 +221,9 @@ class Span final {
     const std::string& GetSpanId() const;
     const std::string& GetParentId() const;
 
+    /// Get name the Span was created with
+    const std::string& GetName() const;
+
     /// @returns true if this span would be logged with the current local and
     /// global log levels to the default logger.
     bool ShouldLogDefault() const noexcept;

core/src/engine/coro/marked_allocator.cpp

@@ -0,0 +1,17 @@
+#include <engine/coro/marked_allocator.hpp>
+
+USERVER_NAMESPACE_BEGIN
+
+namespace engine::coro::debug {
+
+static volatile const std::size_t page_size = MarkedAllocator::traits_type::page_size();
+static volatile std::size_t allocator_stack_size = MarkedAllocator::traits_type::default_size();
+
+MarkedAllocator::MarkedAllocator(std::size_t size) : boost::coroutines2::protected_fixedsize_stack(size) {
+    auto aligment = page_size;
+    allocator_stack_size = (size + aligment - 1) / aligment * aligment;
+}
+
+}  // namespace engine::coro::debug
+
+USERVER_NAMESPACE_END

core/src/engine/coro/marked_allocator.hpp

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <boost/coroutine2/protected_fixedsize_stack.hpp>
+
+USERVER_NAMESPACE_BEGIN
+
+namespace engine::coro::debug {
+
+struct MarkedAllocator : boost::coroutines2::protected_fixedsize_stack {
+    MarkedAllocator(std::size_t size = traits_type::default_size());
+
+    const char kCoroutineMark[16] = "ThisIsCoroAlloc";
+};
+
+}  // namespace engine::coro::debug
+
+USERVER_NAMESPACE_END

core/src/engine/coro/pool.hpp

@@ -5,6 +5,7 @@
 
 #include <moodycamel/concurrentqueue.h>
 
+#include <engine/coro/marked_allocator.hpp>
 #include <engine/coro/pool_config.hpp>
 #include <engine/coro/pool_stats.hpp>
 #include <engine/coro/stack_usage_monitor.hpp>
@@ -60,10 +61,10 @@ class Pool final {
     // outside of any coroutine.
     static inline thread_local std::vector<Coroutine> local_coro_buffer_;
 
-    boost::coroutines2::protected_fixedsize_stack stack_allocator_;
+    debug::MarkedAllocator stack_allocator_;
     // Some pointers arithmetic in StackUsageMonitor depends on this.
     // If you change the allocator, adjust the math there accordingly.
-    static_assert(std::is_same_v<decltype(stack_allocator_), boost::coroutines2::protected_fixedsize_stack>);
+    static_assert(std::is_base_of_v<boost::coroutines2::protected_fixedsize_stack, decltype(stack_allocator_)>);
     StackUsageMonitor stack_usage_monitor_;
 
     // We aim to reuse coroutines as much as possible,

core/src/engine/coro/stack_usage_monitor.hpp

@@ -46,6 +46,8 @@ constexpr std::size_t kStackUsageMonitorLimit = 1000;
 
 std::size_t GetCurrentTaskStackUsageBytes() noexcept;
 
+const void* GetCoroCbPtr(const boost::coroutines2::coroutine<impl::TaskContext*>::push_type& coro) noexcept;
+
 }  // namespace engine::coro
 
 USERVER_NAMESPACE_END

core/src/engine/task/task_context.cpp

@@ -27,6 +27,8 @@
 #include <engine/task/cxxabi_eh_globals.hpp>
 #include <engine/task/task_processor.hpp>
 
+#include <gdb_autogen/cmd/utask/cmd.hpp>
+
 USERVER_NAMESPACE_BEGIN
 
 namespace engine {

core/src/engine/task/task_queue.cpp

@@ -2,6 +2,9 @@
 
 #include <engine/task/task_context.hpp>
 
+#include <gdb_autogen/third_party/moodycamel/printers.hpp>
+#include <pretty_printers/third_party/moodycamel/extractor.hpp>
+
 USERVER_NAMESPACE_BEGIN
 
 namespace engine {
@@ -11,7 +14,9 @@ constexpr std::size_t kSemaphoreInitialCount = 0;
 }
 
 TaskQueue::TaskQueue(const TaskProcessorConfig& config)
-    : queue_semaphore_(kSemaphoreInitialCount, config.spinning_iterations) {}
+    : queue_semaphore_(kSemaphoreInitialCount, config.spinning_iterations) {
+    moodycamel_extractor::instantiate(queue_);
+}
 
 void TaskQueue::Push(boost::intrusive_ptr<impl::TaskContext>&& context) {
     UASSERT(context);