crashpad/client/crashpad_info.h
Mark Mentovai 9b7ff0ea5a Allow exception forwarding to the system’s native crash reporter to be
disabled.

ClientInfo::set_system_crash_reporter_forwarding() can be used to
disable forwarding. The first module that is found with a non-default
value in this field will dictate whether forwarding is enabled or
disabled. It is possible to enable or disable reporting with this call,
as well as reset it to default, which will allow later modules a chance
to influence the behavior.

ClientInfo::set_crashpad_handler_behavior() is also provided, which can
be used to disable Crashpad’s handling of the exception. Most users
should not call this, but should use Settings::SetUploadsEnabled()
instead.

TEST=crashpad_snapshot_test \
         CrashpadInfoClientOptions.*:MachOImageReader.Self_DyldImages; \
     run_with_crashpad --handler crashpad_handler \
         -a --database=/tmp/crashpad_db \
         -a --url=https://clients2.google.com/cr/staging_report \
         -a --annotation=prod=crashpad \
         -a --annotation=ver=0.7.0 \
         crashy_program

R=rsesek@chromium.org

Review URL: https://codereview.chromium.org/997713002
2015-03-11 17:07:11 -04:00

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// Copyright 2014 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef CRASHPAD_CLIENT_CRASHPAD_INFO_H_
#define CRASHPAD_CLIENT_CRASHPAD_INFO_H_
#include "base/basictypes.h"
#include <stdint.h>
#include "client/simple_string_dictionary.h"
#include "util/misc/tri_state.h"
namespace crashpad {
//! \brief A structure that can be used by a Crashpad-enabled program to
//! provide information to the Crashpad crash handler.
//!
//! It is possible for one CrashpadInfo structure to appear in each loaded code
//! module in a process, but from the perspective of the user of the client
//! interface, there is only one global CrashpadInfo structure, located in the
//! module that contains the client interface code.
struct CrashpadInfo {
public:
//! \brief Returns the global CrashpadInfo structure.
static CrashpadInfo* GetCrashpadInfo();
CrashpadInfo();
void set_simple_annotations(SimpleStringDictionary* simple_annotations) {
simple_annotations_ = simple_annotations;
}
//! \brief Enables or disables Crashpad handler processing.
//!
//! When handling an exception, the Crashpad handler will scan all modules in
//! a process. The first one that has a CrashpadInfo structure populated with
//! a value other than #kUnset for this field will dictate whether the handler
//! is functional or not. If all modules with a CrashpadInfo structure specify
//! #kUnset, the handler will be enabled. If disabled, the Crashpad handler
//! will still run and receive exceptions, but will not take any action on an
//! exception on its own behalf, except for the action necessary to determine
//! that it has been disabled.
//!
//! The Crashpad handler should not normally be disabled. More commonly, it
//! is appropraite to disable crash report upload by calling
//! Settings::SetUploadsEnabled().
void set_crashpad_handler_behavior(TriState crashpad_handler_behavior) {
crashpad_handler_behavior_ = crashpad_handler_behavior;
}
//! \brief Enables or disables Crashpad forwarding of exceptions to the
//! systems crash reporter.
//!
//! When handling an exception, the Crashpad handler will scan all modules in
//! a process. The first one that has a CrashpadInfo structure populated with
//! a value other than #kUnset for this field will dictate whether the
//! exception is forwarded to the systems crash reporter. If all modules with
//! a CrashpadInfo structure specify #kUnset, forwarding will be enabled.
//! Unless disabled, forwarding may still occur if the Crashpad handler is
//! disabled by SetCrashpadHandlerState(). Even when forwarding is enabled,
//! the Crashpad handler may choose not to forward all exceptions to the
//! systems crash reporter in cases where it has reason to believe that the
//! systems crash reporter would not normally have handled the exception in
//! Crashpads absence.
void set_system_crash_reporter_forwarding(
TriState system_crash_reporter_forwarding) {
system_crash_reporter_forwarding_ = system_crash_reporter_forwarding;
}
static const uint32_t kSignature = 'CPad';
private:
// The compiler wont necessarily see anyone using these fields, but it
// shouldnt warn about that. These fields arent intended for use by the
// process theyre found in, theyre supposed to be read by the crash
// reporting process.
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-private-field"
#endif
// Fields present in version 1:
uint32_t signature_; // kSignature
uint32_t size_; // The size of the entire CrashpadInfo structure.
uint32_t version_; // kVersion
TriState crashpad_handler_behavior_;
TriState system_crash_reporter_forwarding_;
uint16_t padding_0_;
SimpleStringDictionary* simple_annotations_; // weak
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
DISALLOW_COPY_AND_ASSIGN(CrashpadInfo);
};
} // namespace crashpad
#endif // CRASHPAD_CLIENT_CRASHPAD_INFO_H_