mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-28 15:50:26 +08:00
d5b3a1d531
Adds wrapper to vm_read and vm_deallocate memory to allow for safe in-process memory reads during crashes. Also adds a logging utility safe for in-process exception handling. Bug: crashpad: 31 Change-Id: I658f3181cbec40a79e304b7306466e10c003564f Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2875349 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Justin Cohen <justincohen@chromium.org>
84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
// Copyright 2021 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.
|
|
|
|
#include "util/ios/scoped_vm_read.h"
|
|
|
|
#include <sys/time.h>
|
|
|
|
#include "base/mac/scoped_mach_vm.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
namespace crashpad {
|
|
namespace test {
|
|
namespace {
|
|
|
|
TEST(ScopedVMReadTest, BasicFunctionality) {
|
|
// bad data or count.
|
|
internal::ScopedVMRead<vm_address_t> vmread_bad;
|
|
ASSERT_FALSE(vmread_bad.Read(nullptr, 100));
|
|
ASSERT_FALSE(vmread_bad.Read(reinterpret_cast<void*>(0x1000), 100));
|
|
vm_address_t address = 1;
|
|
ASSERT_FALSE(vmread_bad.Read(&address, 1000000000));
|
|
|
|
// array
|
|
constexpr char read_me[] = "read me";
|
|
internal::ScopedVMRead<char> vmread_string;
|
|
ASSERT_TRUE(vmread_string.Read(read_me, strlen(read_me)));
|
|
EXPECT_STREQ(read_me, vmread_string.get());
|
|
|
|
// struct
|
|
timeval time_of_day;
|
|
EXPECT_TRUE(gettimeofday(&time_of_day, nullptr) == 0);
|
|
internal::ScopedVMRead<timeval> vmread_time;
|
|
ASSERT_TRUE(vmread_time.Read(&time_of_day));
|
|
EXPECT_EQ(time_of_day.tv_sec, vmread_time->tv_sec);
|
|
EXPECT_EQ(time_of_day.tv_usec, vmread_time->tv_usec);
|
|
|
|
// reset.
|
|
timeval time_of_day2;
|
|
EXPECT_TRUE(gettimeofday(&time_of_day2, nullptr) == 0);
|
|
ASSERT_TRUE(vmread_time.Read(&time_of_day2));
|
|
EXPECT_EQ(time_of_day2.tv_sec, vmread_time->tv_sec);
|
|
EXPECT_EQ(time_of_day2.tv_usec, vmread_time->tv_usec);
|
|
}
|
|
|
|
TEST(ScopedVMReadTest, MissingMiddleVM) {
|
|
char* region;
|
|
vm_size_t page_size = getpagesize();
|
|
vm_size_t region_size = page_size * 3;
|
|
ASSERT_EQ(vm_allocate(mach_task_self(),
|
|
reinterpret_cast<vm_address_t*>(®ion),
|
|
region_size,
|
|
VM_FLAGS_ANYWHERE),
|
|
0);
|
|
base::mac::ScopedMachVM vm_owner(reinterpret_cast<vm_address_t>(region),
|
|
region_size);
|
|
|
|
internal::ScopedVMRead<char> vmread_missing_middle;
|
|
ASSERT_TRUE(vmread_missing_middle.Read(region, region_size));
|
|
|
|
// Dealloc middle page.
|
|
ASSERT_EQ(vm_deallocate(mach_task_self(),
|
|
reinterpret_cast<vm_address_t>(region + page_size),
|
|
page_size),
|
|
0);
|
|
|
|
ASSERT_FALSE(vmread_missing_middle.Read(region, region_size));
|
|
ASSERT_TRUE(vmread_missing_middle.Read(region, page_size));
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace test
|
|
} // namespace crashpad
|