pdfium/testing/fake_file_access.h
Tom Sepez dc4e60e8e8 Fix dangling ptrs in embeddertest found by BRP dangling ptr detector.
These were missed by the PDFium probing-style detector because the
raw_ptr<> were never destroyed. LSAN could not find it either, since
the memory was not leaked, just the dangling references were not
cleaned up beforehand.

The reason is that we have C++ classes inheriting from C-style
structs, hence there can not be virtual destructors. When holding an
unique_ptr<> to the C-style struct, the subclass is never destructed.

After this CL lands, we should be able to make the build bots set
the GN variable `enable_dangling_raw_ptr_checks=true`. If that were
set today, hopefully it would flag the issue.

Change-Id: I631b2e07670e1e09111ffa9f35e600cc42b15323
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/112410
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
2023-10-05 22:40:36 +00:00

47 lines
1.2 KiB
C++

// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TESTING_FAKE_FILE_ACCESS_H_
#define TESTING_FAKE_FILE_ACCESS_H_
#include <memory>
#include "core/fxcrt/unowned_ptr.h"
#include "public/fpdf_dataavail.h"
#include "public/fpdfview.h"
#include "testing/range_set.h"
class DownloadHintsImpl;
class FileAccessWrapper;
class FileAvailImpl;
class FakeFileAccess {
public:
explicit FakeFileAccess(FPDF_FILEACCESS* file_access);
~FakeFileAccess();
FPDF_FILEACCESS* GetFileAccess() const;
FX_FILEAVAIL* GetFileAvail() const;
FX_DOWNLOADHINTS* GetDownloadHints() const;
FPDF_BOOL IsDataAvail(size_t offset, size_t size) const;
void AddSegment(size_t offset, size_t size);
unsigned long GetFileSize();
int GetBlock(unsigned long position, unsigned char* pBuf, unsigned long size);
void SetRequestedDataAvailable();
void SetWholeFileAvailable();
private:
UnownedPtr<FPDF_FILEACCESS> file_access_;
std::unique_ptr<FileAccessWrapper> file_access_wrapper_;
std::unique_ptr<FileAvailImpl> file_avail_;
std::unique_ptr<DownloadHintsImpl> download_hints_;
RangeSet available_data_;
RangeSet requested_data_;
};
#endif // TESTING_FAKE_FILE_ACCESS_H_