| 1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
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| 2 | // Use of this source code is governed by a BSD-style license that can be |
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| 3 | // found in the LICENSE file. |
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| 4 | |
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| 5 | #include "flutter/testing/debugger_detection.h" |
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| 6 | |
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| 7 | #include "flutter/fml/build_config.h" |
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| 8 | #include "flutter/fml/logging.h" |
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| 9 | |
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| 10 | #if FML_OS_MACOSX |
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| 11 | #include <assert.h> |
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| 12 | #include <stdbool.h> |
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| 13 | #include <sys/sysctl.h> |
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| 14 | #include <sys/types.h> |
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| 15 | #include <unistd.h> |
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| 16 | #endif // FML_OS_MACOSX |
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| 17 | |
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| 18 | #if FML_OS_WIN |
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| 19 | #include <windows.h> |
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| 20 | #endif // FML_OS_WIN |
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| 21 | |
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| 22 | namespace flutter { |
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| 23 | namespace testing { |
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| 24 | |
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| 25 | DebuggerStatus GetDebuggerStatus() { |
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| 26 | #if FML_OS_MACOSX |
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| 27 | // From Technical Q&A QA1361 Detecting the Debugger |
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| 28 | // https://developer.apple.com/library/archive/qa/qa1361/_index.html |
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| 29 | int management_info_base[4]; |
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| 30 | struct kinfo_proc info; |
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| 31 | size_t size; |
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| 32 | |
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| 33 | // Initialize the flags so that, if sysctl fails for some bizarre |
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| 34 | // reason, we get a predictable result. |
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| 35 | info.kp_proc.p_flag = 0; |
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| 36 | |
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| 37 | // Initialize management_info_base, which tells sysctl the info we want, in |
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| 38 | // this case we're looking for information about a specific process ID. |
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| 39 | management_info_base[0] = CTL_KERN; |
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| 40 | management_info_base[1] = KERN_PROC; |
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| 41 | management_info_base[2] = KERN_PROC_PID; |
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| 42 | management_info_base[3] = getpid(); |
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| 43 | |
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| 44 | // Call sysctl. |
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| 45 | |
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| 46 | size = sizeof(info); |
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| 47 | auto status = |
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| 48 | ::sysctl(management_info_base, |
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| 49 | sizeof(management_info_base) / sizeof(*management_info_base), |
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| 50 | &info, &size, NULL, 0); |
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| 51 | FML_CHECK(status == 0); |
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| 52 | |
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| 53 | // We're being debugged if the P_TRACED flag is set. |
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| 54 | return ((info.kp_proc.p_flag & P_TRACED) != 0) ? DebuggerStatus::kAttached |
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| 55 | : DebuggerStatus::kDontKnow; |
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| 56 | |
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| 57 | #elif FML_OS_WIN |
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| 58 | return ::IsDebuggerPresent() ? DebuggerStatus::kAttached |
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| 59 | : DebuggerStatus::kDontKnow; |
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| 60 | |
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| 61 | #else |
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| 62 | return DebuggerStatus::kDontKnow; |
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| 63 | #endif |
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| 64 | } // namespace testing |
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| 65 | |
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| 66 | } // namespace testing |
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| 67 | } // namespace flutter |
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| 68 | |
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