node/src/debug_utils.h at main · nodejs/node · GitHub

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#ifndef SRC_DEBUG_UTILS_H_

#define SRC_DEBUG_UTILS_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "async_wrap.h"

#include "util.h"

#include <algorithm>

#include <sstream>

#include <string>

// Use FORCE_INLINE on functions that have a debug-category-enabled check first

// and then ideally only a single function call following it, to maintain

// performance for the common case (no debugging used).

#ifdef __GNUC__

#define FORCE_INLINE __attribute__((always_inline))

#define COLD_NOINLINE __attribute__((cold, noinline))

#else

#define FORCE_INLINE

#define COLD_NOINLINE

#endif

namespace node {

class Environment;

template <typename T>

inline std::string ToString(const T& value);

template <typename T>

inline auto ToStringOrStringView(const T& value);

// C++-style variant of sprintf()/fprintf() that:

// - Returns an std::string

// - Handles \0 bytes correctly

// - Supports %p and %s. %d, %i and %u are aliases for %s.

// - Accepts any class that has a ToString() method for stringification.

template <typename... Args>

inline std::string SPrintF(std::string_view format, Args&&... args);

template <typename... Args>

inline void FPrintF(FILE* file, std::string_view format, Args&&... args);

void NODE_EXTERN_PRIVATE FWrite(FILE* file, const std::string& str);

// Listing the AsyncWrap provider types first enables us to cast directly

// from a provider type to a debug category.

#define DEBUG_CATEGORY_NAMES(V) \

NODE_ASYNC_PROVIDER_TYPES(V) \

V(BOOTSTRAP) \

V(CRYPTO) \

V(COMPILE_CACHE) \

V(CONTEXTIFY) \

V(DIAGNOSTICS) \

V(INSPECTOR_SERVER) \

V(INSPECTOR_CLIENT) \

V(INSPECTOR_PROFILER) \

V(CODE_CACHE) \

V(NGTCP2) \

V(NGHTTP3) \

V(SEA) \

V(WASI) \

V(MODULE) \

V(MKSNAPSHOT) \

V(SNAPSHOT_SERDES) \

V(PERFETTO) \

V(PERMISSION_MODEL) \

V(PLATFORM_MINIMAL) \

V(PLATFORM_VERBOSE) \

V(QUIC)

enum class DebugCategory : unsigned int {

#define V(name) name,

DEBUG_CATEGORY_NAMES(V)

#undef V

};

#define V(name) +1

constexpr unsigned int kDebugCategoryCount = DEBUG_CATEGORY_NAMES(V);

#undef V

class NODE_EXTERN_PRIVATE EnabledDebugList {

public:

bool FORCE_INLINE enabled(DebugCategory category) const {

DCHECK_LT(static_cast<unsigned int>(category), kDebugCategoryCount);

return enabled_[static_cast<unsigned int>(category)];

}

// Uses NODE_DEBUG_NATIVE to initialize the categories. env->env_vars()

// is parsed if it is not a nullptr, otherwise the system environment

// variables are parsed.

void Parse(Environment* env);

private:

// Enable all categories matching cats.

void Parse(const std::string& cats);

void set_enabled(DebugCategory category) {

DCHECK_LT(static_cast<unsigned int>(category), kDebugCategoryCount);

enabled_[static_cast<int>(category)] = true;

}

bool enabled_[kDebugCategoryCount] = {false};

};

template <typename... Args>

inline void FORCE_INLINE Debug(EnabledDebugList* list,

DebugCategory cat,

const char* format,

Args&&... args);

inline void FORCE_INLINE Debug(EnabledDebugList* list,

DebugCategory cat,

const char* message);

template <typename... Args>

inline void FORCE_INLINE

Debug(Environment* env, DebugCategory cat, const char* format, Args&&... args);

inline void FORCE_INLINE Debug(Environment* env,

DebugCategory cat,

const char* message);

template <typename... Args>

inline void Debug(Environment* env,

DebugCategory cat,

const std::string& format,

Args&&... args);

// Used internally by the 'real' Debug(AsyncWrap*, ...) functions below, so that

// the FORCE_INLINE flag on them doesn't apply to the contents of this function

// as well.

// We apply COLD_NOINLINE to tell the compiler that it's not worth optimizing

// this function for speed and it should rather focus on keeping it out of

// hot code paths. In particular, we want to keep the string concatenating code

// out of the function containing the original `Debug()` call.

template <typename... Args>

void COLD_NOINLINE UnconditionalAsyncWrapDebug(AsyncWrap* async_wrap,

const char* format,

Args&&... args);

template <typename... Args>

inline void FORCE_INLINE Debug(AsyncWrap* async_wrap,

const char* format,

Args&&... args);

template <typename... Args>

inline void FORCE_INLINE Debug(AsyncWrap* async_wrap,

const std::string& format,

Args&&... args);

// Debug helper for inspecting the currently running `node` executable.

class NativeSymbolDebuggingContext {

public:

static std::unique_ptr<NativeSymbolDebuggingContext> New();

class SymbolInfo {

public:

std::string name;

std::string filename;

size_t line = 0;

size_t dis = 0;

std::string Display() const;

};

NativeSymbolDebuggingContext() = default;

virtual ~NativeSymbolDebuggingContext() = default;

virtual SymbolInfo LookupSymbol(void* address) { return {}; }

virtual bool IsMapped(void* address) { return false; }

virtual int GetStackTrace(void** frames, int count) { return 0; }

NativeSymbolDebuggingContext(const NativeSymbolDebuggingContext&) = delete;

NativeSymbolDebuggingContext(NativeSymbolDebuggingContext&&) = delete;

NativeSymbolDebuggingContext operator=(NativeSymbolDebuggingContext&)

= delete;

NativeSymbolDebuggingContext operator=(NativeSymbolDebuggingContext&&)

= delete;

static std::vector<std::string> GetLoadedLibraries();

};

// Variant of `uv_loop_close` that tries to be as helpful as possible

// about giving information on currently existing handles, if there are any,

// but still aborts the process.

void CheckedUvLoopClose(uv_loop_t* loop);

void PrintLibuvHandleInformation(uv_loop_t* loop, FILE* stream);

namespace per_process {

extern NODE_EXTERN_PRIVATE EnabledDebugList enabled_debug_list;

template <typename... Args>

inline void FORCE_INLINE Debug(DebugCategory cat,

const char* format,

Args&&... args);

inline void FORCE_INLINE Debug(DebugCategory cat, const char* message);

} // namespace per_process

} // namespace node

#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif // SRC_DEBUG_UTILS_H_

node/src/debug_utils.h at main · nodejs/node · GitHub

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