Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 91 insertions, 0 deletions

diff --git a/comphelper/source/misc/debuggerinfo.cxx b/comphelper/source/misc/debuggerinfo.cxx
new file mode 100644
index 000000000..1e7116a55
--- /dev/null
+++ b/comphelper/source/misc/debuggerinfo.cxx
@@ -0,0 +1,91 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <comphelper/debuggerinfo.hxx>
+
+#include <cassert>
+#include <cstring>
+#include <ctype.h>
+
+#if defined(_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#elif defined MACOSX
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#elif defined UNX
+#include <unistd.h>
+#include <fcntl.h>
+#endif
+
+namespace comphelper
+{
+#if defined DBG_UTIL
+bool isDebuggerAttached()
+{
+#if defined(_WIN32)
+    return IsDebuggerPresent();
+#elif defined MACOSX
+    // https://developer.apple.com/library/archive/qa/qa1361/_index.html
+    int junk;
+    int mib[4];
+    struct kinfo_proc info;
+    size_t size;
+
+    // Initialize the flags so that, if sysctl fails for some bizarre
+    // reason, we get a predictable result.
+
+    info.kp_proc.p_flag = 0;
+
+    // Initialize mib, which tells sysctl the info we want, in this case
+    // we're looking for information about a specific process ID.
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_PID;
+    mib[3] = getpid();
+
+    // Call sysctl.
+
+    size = sizeof(info);
+    junk = sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, nullptr, 0);
+    assert(junk == 0);
+
+    // We're being debugged if the P_TRACED flag is set.
+
+    return ((info.kp_proc.p_flag & P_TRACED) != 0);
+#elif defined LINUX
+    char buf[4096];
+    int fd = open("/proc/self/status", O_RDONLY);
+    if (fd < 0)
+        return false;
+    int size = read(fd, buf, sizeof(buf) - 1);
+    close(fd);
+    if (size < 0)
+        return false;
+    assert(size < int(sizeof(buf)) - 1);
+    buf[sizeof(buf) - 1] = '\0';
+    // "TracerPid: <pid>" for pid != 0 means something is attached
+    const char* pos = strstr(buf, "TracerPid:");
+    if (pos == nullptr)
+        return false;
+    pos += strlen("TracerPid:");
+    while (*pos != '\n' && isspace(*pos))
+        ++pos;
+    return *pos != '\n' && *pos != '0';
+#else
+    return false; // feel free to add your platform
+#endif
+}
+#endif
+
+} // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */