gecko/memory/replace/dmd/DMD.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef DMD_h___
#define DMD_h___
#include <stdarg.h>
#include <string.h>
#include "mozilla/Types.h"
namespace mozilla {
namespace dmd {
// Mark a heap block as reported by a memory reporter.
MOZ_EXPORT void
Report(const void* aPtr);
// Mark a heap block as reported immediately on allocation.
MOZ_EXPORT void
ReportOnAlloc(const void* aPtr);
class Writer
{
public:
typedef void (*WriterFun)(void* aWriteState, const char* aFmt, va_list aAp);
Writer(WriterFun aWriterFun, void* aWriteState)
: mWriterFun(aWriterFun), mWriteState(aWriteState)
{}
void Write(const char* aFmt, ...) const;
private:
WriterFun mWriterFun;
void* mWriteState;
};
// Clears existing reportedness data from any prior runs of the memory
// reporters. The following sequence should be used.
// - ClearReports()
// - run the memory reporters
// - Dump()
// This sequence avoids spurious twice-reported warnings.
MOZ_EXPORT void
ClearReports();
// Checks which heap blocks have been reported, and dumps a human-readable
// summary (via |aWrite|). If |aWrite| is nullptr it will dump to stderr.
// Beware: this output may have very long lines.
MOZ_EXPORT void
Dump(Writer aWriter);
// A useful |WriterFun|. If |fp| is a FILE* you want |Dump|'s output to be
// written to, call |Dump(FpWrite, fp)|.
MOZ_EXPORT void
FpWrite(void* aFp, const char* aFmt, va_list aAp);
struct Sizes
{
size_t mStackTracesUsed;
size_t mStackTracesUnused;
size_t mStackTraceTable;
size_t mBlockTable;
Sizes() { Clear(); }
void Clear() { memset(this, 0, sizeof(Sizes)); }
};
// Gets the size of various data structures. Used to implement a memory
// reporter for DMD.
MOZ_EXPORT void
SizeOf(Sizes* aSizes);
} // namespace mozilla
} // namespace dmd
#endif /* DMD_h___ */