gecko-dev/tools/trace-malloc/adreader.h

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4.0 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the trace-malloc Allocation Dump Reader (adreader).
*
* The Initial Developer of the Original Code is L. David Baron.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* L. David Baron <dbaron@dbaron.org> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <stdlib.h>
#define ADLOG_ENTRY_BLOCK_SIZE 4096
class ADLog {
public:
// Use typedef in case somebody wants to process 64-bit output on a
// 32-bit machine someday.
typedef const char* Pointer;
struct Entry {
Pointer address;
const char *type;
const char *data; // The contents of the memory.
size_t datasize;
const char *allocation_stack;
};
ADLog();
~ADLog();
/*
* Returns false on failure and true on success.
*/
bool Read(const char *aFilename);
private:
// Link structure for a circularly linked list.
struct EntryBlock;
struct EntryBlockLink {
EntryBlock *mPrev;
EntryBlock *mNext;
};
struct EntryBlock : public EntryBlockLink {
Entry entries[ADLOG_ENTRY_BLOCK_SIZE];
};
size_t mEntryCount;
EntryBlockLink mEntries;
public:
class const_iterator {
private:
// Only |ADLog| member functions can construct iterators.
friend class ADLog;
const_iterator(EntryBlock *aBlock, size_t aOffset);
public:
const Entry* operator*() { return mCur; }
const Entry* operator->() { return mCur; }
const_iterator& operator++();
const_iterator& operator--();
bool operator==(const const_iterator& aOther) const {
return mCur == aOther.mCur;
}
bool operator!=(const const_iterator& aOther) const {
return mCur != aOther.mCur;
}
private:
void SetBlock(EntryBlock *aBlock) {
mBlock = aBlock;
mBlockStart = aBlock->entries;
mBlockEnd = aBlock->entries + ADLOG_ENTRY_BLOCK_SIZE;
}
EntryBlock *mBlock;
Entry *mCur, *mBlockStart, *mBlockEnd;
// Not to be implemented.
const_iterator operator++(int);
const_iterator operator--(int);
};
const_iterator begin() {
return const_iterator(mEntries.mNext, 0);
}
const_iterator end() {
return const_iterator(mEntries.mPrev,
mEntryCount % ADLOG_ENTRY_BLOCK_SIZE);
}
size_t count() { return mEntryCount; }
};