greenplumn CStackDescriptor 源码
greenplumn CStackDescriptor 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/common/CStackDescriptor.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CStackTrace.h
//
// @doc:
// Interface class for execution stack tracing.
//---------------------------------------------------------------------------
#ifndef GPOS_CStackDescriptor_H
#define GPOS_CStackDescriptor_H
#include "gpos/common/clibtypes.h"
#include "gpos/io/IOstream.h"
#include "gpos/types.h"
#define GPOS_STACK_TRACE_BUFFER_SIZE 4096
#define GPOS_STACK_TRACE_DEPTH 32
#define GPOS_STACK_SYMBOL_SIZE 16384
#define GPOS_STACK_TRACE_FORMAT_SIZE 192
namespace gpos
{
// prototype
class CWString;
class CStackDescriptor
{
private:
// stack depth
ULONG m_depth{0};
// array with frame return addresses
void *m_array_of_addresses[GPOS_STACK_TRACE_DEPTH];
// append formatted symbol description
void AppendSymbolInfo(CWString *ws, CHAR *demangling_symbol_buffer,
SIZE_T size, const Dl_info &symbol_info_array,
ULONG index) const;
// reset descriptor
void
Reset()
{
// reset stack depth
m_depth = 0;
}
public:
// ctor
CStackDescriptor()
{
Reset();
}
// store current stack skipping (top_frames_to_skip) top frames
void BackTrace(ULONG top_frames_to_skip = 0);
// append trace of stored stack to string
void AppendTrace(CWString *ws, ULONG depth = GPOS_STACK_TRACE_DEPTH) const;
// append trace of stored stack to stream
void AppendTrace(IOstream &os, ULONG depth = GPOS_STACK_TRACE_DEPTH) const;
// get hash value for stored stack
ULONG HashValue() const;
}; // class CStackTrace
} // namespace gpos
#endif // !GPOS_CStackDescriptor_H_
// EOF
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