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eb62bae167
- Drop `delim` argument from the `GetStackTrace()` family of functions. We only ever used plain spaces. - Use an `std::vector<std::string>` for the symbolized stack frames and adjust the unwind proto accordingly. This change now prints each stack frame on its own line while skipping duplicate ones: ``` I20200717 11:47:16.811381 3636246 monitor.cc:326] Stack trace: [ I20200717 11:47:16.811415 3636246 monitor.cc:337] map:/lib/x86_64-linux-gnu/libc-2.30.so+0xceee7(0x7fb871602ee7) I20200717 11:47:16.811420 3636246 monitor.cc:337] Rot13File+0x130(0x55ed24615995) I20200717 11:47:16.811424 3636246 monitor.cc:337] ffi_call_unix64+0x55(0x55ed2461f2dd) I20200717 11:47:16.811429 3636246 monitor.cc:337] map:[stack]+0x1ec80(0x7ffee4257c80) I20200717 11:47:16.811455 3636246 monitor.cc:339] (last frame repeated 196 times) I20200717 11:47:16.811460 3636246 monitor.cc:347] ] ``` PiperOrigin-RevId: 322089140 Change-Id: I05b0de2f4118fed90fe920c06bbd70ea0d1119e2
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
// Copyright 2019 Google LLC
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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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// The sandbox2::StackTrace class provides static methods useful when analyzing
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// call-stack of the process. It uses libunwind-ptrace, so the process must be
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// in a stopped state to call those methods.
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#ifndef SANDBOXED_API_SANDBOX2_STACK_TRACE_H_
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#define SANDBOXED_API_SANDBOX2_STACK_TRACE_H_
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#include <sys/types.h>
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#include <cstddef>
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#include <memory>
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#include <string>
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#include <vector>
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#include "sandboxed_api/sandbox2/mounts.h"
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#include "sandboxed_api/sandbox2/policy.h"
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#include "sandboxed_api/sandbox2/regs.h"
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namespace sandbox2 {
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// Maximum depth of analyzed call stack.
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constexpr size_t kDefaultMaxFrames = 200;
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// Returns the stack-trace of the PID=pid, one line per frame.
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std::vector<std::string> GetStackTrace(const Regs* regs, const Mounts& mounts);
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// Similar to GetStackTrace() but without using the sandbox to isolate
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// libunwind.
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std::vector<std::string> UnsafeGetStackTrace(pid_t pid);
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// Returns a stack trace that collapses duplicate stack frames and annotates
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// them with a repetition count.
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// Example:
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// _start _start
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// main main
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// recursive_call recursive_call
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// recursive_call (previous frame repeated 2 times)
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// recursive_call tail_call
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// tail_call
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std::vector<std::string> CompactStackTrace(
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const std::vector<std::string>& stack_trace);
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} // namespace sandbox2
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#endif // SANDBOXED_API_SANDBOX2_STACK_TRACE_H_
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