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Add UploadReport to manage database resources during upload

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This change adds CrashReportDatabase::UploadReport which owns the
report's file handle during upload. An upload is recorded as a success
by calling RecordUploadComplete(). If RecordUploadComplete() is not
called, the operation is recorded as a failure when the UploadReport is
destroyed.

Bug: crashpad:206
Change-Id: I8385d08d52185ad30b06a3ed054de9812ae006a2
Reviewed-on: https://chromium-review.googlesource.com/917983
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
This commit is contained in:
Joshua Peraza 2018-02-15 08:17:12 -08:00 committed by Commit Bot
parent 7d5487fc44
commit c406797ce6
8 changed files with 168 additions and 153 deletions
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24
client/crash_report_database.cc
View File

@ -55,4 +55,28 @@ bool CrashReportDatabase::NewReport::Initialize(
return true;
}
CrashReportDatabase::UploadReport::UploadReport()
: Report(), reader_(std::make_unique<FileReader>()), database_(nullptr) {}
CrashReportDatabase::UploadReport::~UploadReport() {
if (database_) {
database_->RecordUploadAttempt(this, false, std::string());
}
}
bool CrashReportDatabase::UploadReport::Initialize(const base::FilePath path,
CrashReportDatabase* db) {
database_ = db;
return reader_->Open(path);
}
CrashReportDatabase::OperationStatus CrashReportDatabase::RecordUploadComplete(
std::unique_ptr<const UploadReport> report_in,
const std::string& id) {
UploadReport* report = const_cast<UploadReport*>(report_in.get());
report->database_ = nullptr;
return RecordUploadAttempt(report, true, id);
}
} // namespace crashpad

91
client/crash_report_database.h
View File

@ -24,6 +24,7 @@
#include "base/files/file_path.h"
#include "base/macros.h"
#include "util/file/file_io.h"
#include "util/file/file_reader.h"
#include "util/file/file_writer.h"
#include "util/file/scoped_remove_file.h"
#include "util/misc/metrics.h"
@ -49,7 +50,7 @@ class Settings;
//! processed, or it was has been brought back from 'Completed' state by
//! user request.
//! 3. Completed: The report has been locally processed, either by uploading
//! it to a collection server and calling RecordUploadAttempt(), or by
//! it to a collection server and calling RecordUploadComplete(), or by
//! calling SkipReportUpload().
class CrashReportDatabase {
public:
@ -100,7 +101,7 @@ class CrashReportDatabase {
//! \brief A crash report that is in the process of being written.
//!
//! An instance of this struct should be created via PrepareNewCrashReport().
//! An instance of this class should be created via PrepareNewCrashReport().
class NewReport {
public:
NewReport();
@ -128,6 +129,30 @@ class CrashReportDatabase {
DISALLOW_COPY_AND_ASSIGN(NewReport);
};
//! \brief A crash report that is in the process of being uploaded.
//!
//! An instance of this class should be created via GetReportForUploading().
class UploadReport : public Report {
public:
UploadReport();
virtual ~UploadReport();
// An open FileReader with which to read the report.
FileReader* Reader() const { return reader_.get(); }
private:
friend class CrashReportDatabase;
friend class CrashReportDatabaseMac;
friend class CrashReportDatabaseWin;
bool Initialize(const base::FilePath path, CrashReportDatabase* database);
std::unique_ptr<FileReader> reader_;
CrashReportDatabase* database_;
DISALLOW_COPY_AND_ASSIGN(UploadReport);
};
//! \brief The result code for operations performed on a database.
enum OperationStatus {
//! \brief No error occurred.
@ -260,42 +285,38 @@ class CrashReportDatabase {
//! \return The operation status code.
virtual OperationStatus GetCompletedReports(std::vector<Report>* reports) = 0;
//! \brief Obtains a report object for uploading to a collection server.
//! \brief Obtains and locks a report object for uploading to a collection
//! server.
//!
//! The file at Report::file_path should be uploaded by the caller, and then
//! the returned Report object must be disposed of via a call to
//! RecordUploadAttempt().
//!
//! A subsequent call to this method with the same \a uuid is illegal until
//! RecordUploadAttempt() has been called.
//! Callers should upload the crash report using the FileReader provided.
//! Callers should then call RecordUploadComplete() to record a successful
//! upload. If RecordUploadComplete() is not called, the upload attempt will
//! be recorded as unsuccessful and the report lock released when \a report is
//! destroyed.
//!
//! \param[in] uuid The unique identifier for the crash report record.
//! \param[out] report A crash report record for the report to be uploaded.
//! The caller does not own this object. Only valid if this returns
//! #kNoError.
//! Only valid if this returns #kNoError.
//!
//! \return The operation status code.
virtual OperationStatus GetReportForUploading(const UUID& uuid,
const Report** report) = 0;
virtual OperationStatus GetReportForUploading(
const UUID& uuid,
std::unique_ptr<const UploadReport>* report) = 0;
//! \brief Adjusts a crash report record’s metadata to account for an upload
//! attempt, and updates the last upload attempt time as returned by
//! \brief Records a successful upload for a report and updates the last
//! upload attempt time as returned by
//! Settings::GetLastUploadAttemptTime().
//!
//! After calling this method, the database is permitted to move and rename
//! the file at Report::file_path.
//!
//! \param[in] report The report object obtained from
//! GetReportForUploading(). This object is invalidated after this call.
//! \param[in] successful Whether the upload attempt was successful.
//! \param[in] id The identifier assigned to this crash report by the
//! collection server. Must be empty if \a successful is `false`; may be
//! empty if it is `true`.
//! \param[in] report A UploadReport object obtained from
//! GetReportForUploading(). The UploadReport object will be invalidated
//! and the report unlocked as part of this call.
//! \param[in] id The possibly empty identifier assigned to this crash report
//! by the collection server.
//!
//! \return The operation status code.
virtual OperationStatus RecordUploadAttempt(const Report* report,
bool successful,
const std::string& id) = 0;
OperationStatus RecordUploadComplete(
std::unique_ptr<const UploadReport> report,
const std::string& id);
//! \brief Moves a report from the pending state to the completed state, but
//! without the report being uploaded.
@ -331,6 +352,22 @@ class CrashReportDatabase {
CrashReportDatabase() {}
private:
//! \brief Adjusts a crash report record’s metadata to account for an upload
//! attempt, and updates the last upload attempt time as returned by
//! Settings::GetLastUploadAttemptTime().
//!
//! \param[in] report The report object obtained from
//! GetReportForUploading().
//! \param[in] successful Whether the upload attempt was successful.
//! \param[in] id The identifier assigned to this crash report by the
//! collection server. Must be empty if \a successful is `false`; may be
//! empty if it is `true`.
//!
//! \return The operation status code.
virtual OperationStatus RecordUploadAttempt(UploadReport* report,
bool successful,
const std::string& id) = 0;
DISALLOW_COPY_AND_ASSIGN(CrashReportDatabase);
};

53
client/crash_report_database_mac.mm
View File

@ -139,17 +139,20 @@ class CrashReportDatabaseMac : public CrashReportDatabase {
OperationStatus LookUpCrashReport(const UUID& uuid, Report* report) override;
OperationStatus GetPendingReports(std::vector<Report>* reports) override;
OperationStatus GetCompletedReports(std::vector<Report>* reports) override;
OperationStatus GetReportForUploading(const UUID& uuid,
const Report** report) override;
OperationStatus RecordUploadAttempt(const Report* report,
bool successful,
const std::string& id) override;
OperationStatus GetReportForUploading(
const UUID& uuid,
std::unique_ptr<const UploadReport>* report) override;
OperationStatus SkipReportUpload(const UUID& uuid,
Metrics::CrashSkippedReason reason) override;
OperationStatus DeleteReport(const UUID& uuid) override;
OperationStatus RequestUpload(const UUID& uuid) override;
private:
// CrashReportDatabase:
OperationStatus RecordUploadAttempt(UploadReport* report,
bool successful,
const std::string& id) override;
//! \brief Report states for use with LocateCrashReport().
//!
//! ReportState may be considered to be a bitfield.
@ -163,10 +166,10 @@ class CrashReportDatabaseMac : public CrashReportDatabase {
//! \brief A private extension of the Report class that maintains bookkeeping
//! information of the database.
struct UploadReport : public Report {
struct UploadReportMac : public UploadReport {
//! \brief Stores the flock of the file for the duration of
//! GetReportForUploading() and RecordUploadAttempt().
int lock_fd;
base::ScopedFD lock_fd;
};
//! \brief Locates a crash report in the database by UUID.
@ -406,31 +409,36 @@ CrashReportDatabaseMac::GetCompletedReports(
}
CrashReportDatabase::OperationStatus
CrashReportDatabaseMac::GetReportForUploading(const UUID& uuid,
const Report** report) {
CrashReportDatabaseMac::GetReportForUploading(
const UUID& uuid,
std::unique_ptr<const UploadReport>* report) {
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
base::FilePath report_path = LocateCrashReport(uuid, kReportStatePending);
if (report_path.empty())
auto upload_report = std::make_unique<UploadReportMac>();
upload_report->file_path = LocateCrashReport(uuid, kReportStatePending);
if (upload_report->file_path.empty())
return kReportNotFound;
std::unique_ptr<UploadReport> upload_report(new UploadReport());
upload_report->file_path = report_path;
base::ScopedFD lock(ObtainReportLock(report_path));
base::ScopedFD lock(ObtainReportLock(upload_report->file_path));
if (!lock.is_valid())
return kBusyError;
if (!ReadReportMetadataLocked(report_path, upload_report.get()))
if (!ReadReportMetadataLocked(upload_report->file_path, upload_report.get()))
return kDatabaseError;
upload_report->lock_fd = lock.release();
*report = upload_report.release();
if (!upload_report->reader_->Open(upload_report->file_path)) {
return kFileSystemError;
}
upload_report->database_ = this;
upload_report->lock_fd.reset(lock.release());
report->reset(upload_report.release());
return kNoError;
}
CrashReportDatabase::OperationStatus
CrashReportDatabaseMac::RecordUploadAttempt(const Report* report,
CrashReportDatabaseMac::RecordUploadAttempt(UploadReport* report,
bool successful,
const std::string& id) {
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
@ -445,13 +453,6 @@ CrashReportDatabaseMac::RecordUploadAttempt(const Report* report,
if (report_path.empty())
return kReportNotFound;
std::unique_ptr<const UploadReport> upload_report(
static_cast<const UploadReport*>(report));
base::ScopedFD lock(upload_report->lock_fd);
if (!lock.is_valid())
return kBusyError;
if (successful) {
CrashReportDatabase::OperationStatus os =
MarkReportCompletedLocked(report_path, &report_path);

24
client/crash_report_database_test.cc
View File

@ -69,15 +69,19 @@ class CrashReportDatabaseTest : public testing::Test {
time_t times[2];
ASSERT_TRUE(settings->GetLastUploadAttemptTime(&times[0]));
const CrashReportDatabase::Report* report = nullptr;
std::unique_ptr<const CrashReportDatabase::UploadReport> report;
ASSERT_EQ(db_->GetReportForUploading(uuid, &report),
CrashReportDatabase::kNoError);
EXPECT_NE(report->uuid, UUID());
EXPECT_FALSE(report->file_path.empty());
EXPECT_TRUE(FileExists(report->file_path)) << report->file_path.value();
EXPECT_GT(report->creation_time, 0);
EXPECT_EQ(db_->RecordUploadAttempt(report, successful, id),
CrashReportDatabase::kNoError);
if (successful) {
EXPECT_EQ(db_->RecordUploadComplete(std::move(report), id),
CrashReportDatabase::kNoError);
} else {
report.reset();
}
ASSERT_TRUE(settings->GetLastUploadAttemptTime(&times[1]));
EXPECT_NE(times[1], 0);
@ -452,16 +456,16 @@ TEST_F(CrashReportDatabaseTest, DuelingUploads) {
CrashReportDatabase::Report report;
CreateCrashReport(&report);
const CrashReportDatabase::Report* upload_report;
std::unique_ptr<const CrashReportDatabase::UploadReport> upload_report;
EXPECT_EQ(db()->GetReportForUploading(report.uuid, &upload_report),
CrashReportDatabase::kNoError);
const CrashReportDatabase::Report* upload_report_2 = nullptr;
std::unique_ptr<const CrashReportDatabase::UploadReport> upload_report_2;
EXPECT_EQ(db()->GetReportForUploading(report.uuid, &upload_report_2),
CrashReportDatabase::kBusyError);
EXPECT_FALSE(upload_report_2);
EXPECT_EQ(db()->RecordUploadAttempt(upload_report, true, std::string()),
EXPECT_EQ(db()->RecordUploadComplete(std::move(upload_report), std::string()),
CrashReportDatabase::kNoError);
}
@ -469,16 +473,16 @@ TEST_F(CrashReportDatabaseTest, UploadAlreadyUploaded) {
CrashReportDatabase::Report report;
CreateCrashReport(&report);
const CrashReportDatabase::Report* upload_report;
std::unique_ptr<const CrashReportDatabase::UploadReport> upload_report;
EXPECT_EQ(db()->GetReportForUploading(report.uuid, &upload_report),
CrashReportDatabase::kNoError);
EXPECT_EQ(db()->RecordUploadAttempt(upload_report, true, std::string()),
EXPECT_EQ(db()->RecordUploadComplete(std::move(upload_report), std::string()),
CrashReportDatabase::kNoError);
const CrashReportDatabase::Report* upload_report_2 = nullptr;
std::unique_ptr<const CrashReportDatabase::UploadReport> upload_report_2;
EXPECT_EQ(db()->GetReportForUploading(report.uuid, &upload_report_2),
CrashReportDatabase::kReportNotFound);
EXPECT_FALSE(upload_report_2);
EXPECT_FALSE(upload_report_2.get());
}
TEST_F(CrashReportDatabaseTest, MoveDatabase) {

42
client/crash_report_database_win.cc
View File

@ -29,6 +29,7 @@
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "client/settings.h"
#include "util/misc/implicit_cast.h"
#include "util/misc/initialization_state_dcheck.h"
#include "util/misc/metrics.h"
@ -591,17 +592,20 @@ class CrashReportDatabaseWin : public CrashReportDatabase {
OperationStatus LookUpCrashReport(const UUID& uuid, Report* report) override;
OperationStatus GetPendingReports(std::vector<Report>* reports) override;
OperationStatus GetCompletedReports(std::vector<Report>* reports) override;
OperationStatus GetReportForUploading(const UUID& uuid,
const Report** report) override;
OperationStatus RecordUploadAttempt(const Report* report,
bool successful,
const std::string& id) override;
OperationStatus GetReportForUploading(
const UUID& uuid,
std::unique_ptr<const UploadReport>* report) override;
OperationStatus SkipReportUpload(const UUID& uuid,
Metrics::CrashSkippedReason reason) override;
OperationStatus DeleteReport(const UUID& uuid) override;
OperationStatus RequestUpload(const UUID& uuid) override;
private:
// CrashReportDatabase:
OperationStatus RecordUploadAttempt(UploadReport* report,
bool successful,
const std::string& id) override;
std::unique_ptr<Metadata> AcquireMetadata();
base::FilePath base_dir_;
@ -716,44 +720,38 @@ OperationStatus CrashReportDatabaseWin::GetCompletedReports(
OperationStatus CrashReportDatabaseWin::GetReportForUploading(
const UUID& uuid,
const Report** report) {
std::unique_ptr<const UploadReport>* report) {
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
std::unique_ptr<Metadata> metadata(AcquireMetadata());
if (!metadata)
return kDatabaseError;
// TODO(scottmg): After returning this report to the client, there is no way
// to reap this report if the uploader fails to call RecordUploadAttempt() or
// SkipReportUpload() (if it crashed or was otherwise buggy). To resolve this,
// one possibility would be to change the interface to be FileHandle based, so
// that instead of giving the file_path back to the client and changing state
// to kUploading, we return an exclusive access handle, and use that as the
// signal that the upload is pending, rather than an update to state in the
// metadata. Alternatively, there could be a "garbage collection" at startup
// where any reports that are orphaned in the kUploading state are either
// reset to kPending to retry, or discarded.
ReportDisk* report_disk;
OperationStatus os = metadata->FindSingleReportAndMarkDirty(
uuid, ReportState::kPending, &report_disk);
if (os == kNoError) {
report_disk->state = ReportState::kUploading;
// Create a copy for passing back to client. This will be freed in
// RecordUploadAttempt.
*report = new Report(*report_disk);
auto upload_report = std::make_unique<UploadReport>();
*implicit_cast<Report*>(upload_report.get()) = *report_disk;
if (!upload_report->Initialize(upload_report->file_path, this)) {
return kFileSystemError;
}
report->reset(upload_report.release());
}
return os;
}
OperationStatus CrashReportDatabaseWin::RecordUploadAttempt(
const Report* report,
UploadReport* report,
bool successful,
const std::string& id) {
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
Metrics::CrashUploadAttempted(successful);
// Take ownership, allocated in GetReportForUploading.
std::unique_ptr<const Report> upload_report(report);
std::unique_ptr<Metadata> metadata(AcquireMetadata());
if (!metadata)
return kDatabaseError;

5
client/prune_crash_reports_test.cc
View File

@ -42,9 +42,10 @@ class MockDatabase : public CrashReportDatabase {
MOCK_METHOD1(GetPendingReports, OperationStatus(std::vector<Report>*));
MOCK_METHOD1(GetCompletedReports, OperationStatus(std::vector<Report>*));
MOCK_METHOD2(GetReportForUploading,
OperationStatus(const UUID&, const Report**));
OperationStatus(const UUID&,
std::unique_ptr<const UploadReport>*));
MOCK_METHOD3(RecordUploadAttempt,
OperationStatus(const Report*, bool, const std::string&));
OperationStatus(UploadReport*, bool, const std::string&));
MOCK_METHOD2(SkipReportUpload,
OperationStatus(const UUID&, Metrics::CrashSkippedReason));
MOCK_METHOD1(DeleteReport, OperationStatus(const UUID&));

78
handler/crash_report_upload_thread.cc
View File

@ -45,44 +45,6 @@
namespace crashpad {
namespace {
// Calls CrashReportDatabase::RecordUploadAttempt() with |successful| set to
// false upon destruction unless disarmed by calling Fire() or Disarm(). Fire()
// triggers an immediate call. Armed upon construction.
class CallRecordUploadAttempt {
public:
CallRecordUploadAttempt(CrashReportDatabase* database,
const CrashReportDatabase::Report* report)
: database_(database),
report_(report) {
}
~CallRecordUploadAttempt() {
Fire();
}
void Fire() {
if (report_) {
database_->RecordUploadAttempt(report_, false, std::string());
}
Disarm();
}
void Disarm() {
report_ = nullptr;
}
private:
CrashReportDatabase* database_; // weak
const CrashReportDatabase::Report* report_; // weak
DISALLOW_COPY_AND_ASSIGN(CallRecordUploadAttempt);
};
} // namespace
CrashReportUploadThread::CrashReportUploadThread(CrashReportDatabase* database,
const std::string& url,
const Options& options)
@ -229,7 +191,7 @@ void CrashReportUploadThread::ProcessPendingReport(
}
}
const CrashReportDatabase::Report* upload_report;
std::unique_ptr<const CrashReportDatabase::UploadReport> upload_report;
CrashReportDatabase::OperationStatus status =
database_->GetReportForUploading(report.uuid, &upload_report);
switch (status) {
@ -256,18 +218,16 @@ void CrashReportUploadThread::ProcessPendingReport(
return;
}
CallRecordUploadAttempt call_record_upload_attempt(database_, upload_report);
std::string response_body;
UploadResult upload_result = UploadReport(upload_report, &response_body);
UploadResult upload_result =
UploadReport(upload_report.get(), &response_body);
switch (upload_result) {
case UploadResult::kSuccess:
call_record_upload_attempt.Disarm();
database_->RecordUploadAttempt(upload_report, true, response_body);
database_->RecordUploadComplete(std::move(upload_report), response_body);
break;
case UploadResult::kPermanentFailure:
case UploadResult::kRetry:
call_record_upload_attempt.Fire();
upload_report.reset();
// TODO(mark): Deal with retries properly: don’t call SkipReportUplaod()
// if the result was kRetry and the report hasn’t already been retried
@ -279,17 +239,12 @@ void CrashReportUploadThread::ProcessPendingReport(
}
CrashReportUploadThread::UploadResult CrashReportUploadThread::UploadReport(
const CrashReportDatabase::Report* report,
const CrashReportDatabase::UploadReport* report,
std::string* response_body) {
std::map<std::string, std::string> parameters;
FileReader minidump_file_reader;
if (!minidump_file_reader.Open(report->file_path)) {
// If the minidump file can’t be opened, all hope is lost.
return UploadResult::kPermanentFailure;
}
FileOffset start_offset = minidump_file_reader.SeekGet();
FileReader* reader = report->Reader();
FileOffset start_offset = reader->SeekGet();
if (start_offset < 0) {
return UploadResult::kPermanentFailure;
}
@ -299,12 +254,12 @@ CrashReportUploadThread::UploadResult CrashReportUploadThread::UploadReport(
// parameters, but as long as there’s a dump file, the server can decide what
// to do with it.
ProcessSnapshotMinidump minidump_process_snapshot;
if (minidump_process_snapshot.Initialize(&minidump_file_reader)) {
if (minidump_process_snapshot.Initialize(reader)) {
parameters =
BreakpadHTTPFormParametersFromMinidump(&minidump_process_snapshot);
}
if (!minidump_file_reader.SeekSet(start_offset)) {
if (!reader->SeekSet(start_offset)) {
return UploadResult::kPermanentFailure;
}
@ -322,15 +277,10 @@ CrashReportUploadThread::UploadResult CrashReportUploadThread::UploadReport(
}
}
http_multipart_builder.SetFileAttachment(
kMinidumpKey,
#if defined(OS_WIN)
base::UTF16ToUTF8(report->file_path.BaseName().value()),
#else
report->file_path.BaseName().value(),
#endif
&minidump_file_reader,
"application/octet-stream");
http_multipart_builder.SetFileAttachment(kMinidumpKey,
report->uuid.ToString() + ".dmp",
reader,
"application/octet-stream");
std::unique_ptr<HTTPTransport> http_transport(HTTPTransport::Create());
HTTPHeaders content_headers;

4
handler/crash_report_upload_thread.h
View File

@ -148,14 +148,14 @@ class CrashReportUploadThread : public WorkerThread::Delegate {
//! \param[in] report The report to upload. The caller is responsible for
//! calling CrashReportDatabase::GetReportForUploading() before calling
//! this method, and for calling
//! CrashReportDatabase::RecordUploadAttempt() after calling this method.
//! CrashReportDatabase::RecordUploadComplete() after calling this method.
//! \param[out] response_body If the upload attempt is successful, this will
//! be set to the response body sent by the server. Breakpad-type servers
//! provide the crash ID assigned by the server in the response body.
//!
//! \return A member of UploadResult indicating the result of the upload
//! attempt.
UploadResult UploadReport(const CrashReportDatabase::Report* report,
UploadResult UploadReport(const CrashReportDatabase::UploadReport* report,
std::string* response_body);
// WorkerThread::Delegate: