ClickHouse/src/Common/StackTrace.h
2021-02-03 08:53:21 +03:00

77 lines
2.1 KiB
C++

#pragma once
#include <common/types.h>
#include <string>
#include <vector>
#include <array>
#include <optional>
#include <functional>
#include <signal.h>
#ifdef __APPLE__
// ucontext is not available without _XOPEN_SOURCE
# pragma clang diagnostic ignored "-Wreserved-id-macro"
# define _XOPEN_SOURCE 700
#endif
#include <ucontext.h>
struct NoCapture
{
};
/// Tries to capture current stack trace using libunwind or signal context
/// NOTE: StackTrace calculation is signal safe only if updatePHDRCache() was called beforehand.
class StackTrace
{
public:
struct Frame
{
const void * virtual_addr = nullptr;
void * physical_addr = nullptr;
std::optional<std::string> symbol;
std::optional<std::string> object;
std::optional<std::string> file;
std::optional<UInt64> line;
};
static constexpr size_t capacity =
#ifndef NDEBUG
/* The stacks are normally larger in debug version due to less inlining. */
64
#else
32
#endif
;
using FramePointers = std::array<void *, capacity>;
using Frames = std::array<Frame, capacity>;
/// Tries to capture stack trace
StackTrace();
/// Tries to capture stack trace. Fallbacks on parsing caller address from
/// signal context if no stack trace could be captured
StackTrace(const ucontext_t & signal_context);
/// Creates empty object for deferred initialization
StackTrace(NoCapture);
size_t getSize() const;
size_t getOffset() const;
const FramePointers & getFramePointers() const;
std::string toString() const;
static std::string toString(void ** frame_pointers, size_t offset, size_t size);
static void symbolize(const FramePointers & frame_pointers, size_t offset, size_t size, StackTrace::Frames & frames);
void toStringEveryLine(std::function<void(const std::string &)> callback) const;
protected:
void tryCapture();
size_t size = 0;
size_t offset = 0; /// How many frames to skip while displaying.
FramePointers frame_pointers{};
};
std::string signalToErrorMessage(int sig, const siginfo_t & info, const ucontext_t & context);