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07fcf63c21
Mostly size_t <-> unsigned int warnings, but I also had a mistake in PROCESS_BASIC_INFORMATION, the pids are 32-on-32 and 64-on-64. The Windows build is still x86 until https://codereview.chromium.org/981333002/. I don't think I'll bother maintaining the x86 build for now, though we will probably need it for x86 OSs in the future. It should be straightforward to revive it once we need it, and have bots to support it. R=mark@chromium.org BUG=crashpad:1 Review URL: https://codereview.chromium.org/983103004
69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "minidump/minidump_thread_id_map.h"
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#include <limits>
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#include <set>
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#include <utility>
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#include "base/logging.h"
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#include "base/numerics/safe_conversions.h"
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#include "snapshot/thread_snapshot.h"
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namespace crashpad {
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void BuildMinidumpThreadIDMap(
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const std::vector<const ThreadSnapshot*>& thread_snapshots,
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MinidumpThreadIDMap* thread_id_map) {
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DCHECK(thread_id_map->empty());
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// First, try truncating each 64-bit thread ID to 32 bits. If that’s possible
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// for each unique 64-bit thread ID, then this will be used as the mapping.
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// This preserves as much of the original thread ID as possible when feasible.
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bool collision = false;
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std::set<uint32_t> thread_ids_32;
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for (const ThreadSnapshot* thread_snapshot : thread_snapshots) {
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uint64_t thread_id_64 = thread_snapshot->ThreadID();
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if (thread_id_map->find(thread_id_64) == thread_id_map->end()) {
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uint32_t thread_id_32 = static_cast<uint32_t>(thread_id_64);
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if (thread_ids_32.find(thread_id_32) != thread_ids_32.end()) {
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collision = true;
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break;
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}
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thread_ids_32.insert(thread_id_32);
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thread_id_map->insert(std::make_pair(thread_id_64, thread_id_32));
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}
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}
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if (collision) {
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// Since there was a collision, go back and assign each unique 64-bit thread
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// ID its own sequential 32-bit equivalent. The 32-bit thread IDs will not
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// bear any resemblance to the original 64-bit thread IDs.
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thread_id_map->clear();
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for (const ThreadSnapshot* thread_snapshot : thread_snapshots) {
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uint64_t thread_id_64 = thread_snapshot->ThreadID();
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if (thread_id_map->find(thread_id_64) == thread_id_map->end()) {
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uint32_t thread_id_32 =
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base::checked_cast<uint32_t>(thread_id_map->size());
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thread_id_map->insert(std::make_pair(thread_id_64, thread_id_32));
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}
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}
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DCHECK_LE(thread_id_map->size(), std::numeric_limits<uint32_t>::max());
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}
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}
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} // namespace crashpad
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