1 files changed, 72 insertions, 0 deletions
diff --git a/sal/osl/unx/backtraceapi.cxx b/sal/osl/unx/backtraceapi.cxx
new file mode 100644
index 000000000..d11128353
--- /dev/null
+++ b/sal/osl/unx/backtraceapi.cxx
@@ -0,0 +1,72 @@
+/* -*- 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 <sal/config.h>
+
+#include <cassert>
+#include <cstdlib>
+#include <limits>
+#include <memory>
+
+#include <o3tl/runtimetooustring.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <sal/backtrace.hxx>
+
+#include "backtrace.h"
+#include <backtraceasstring.hxx>
+
+namespace {
+
+struct FreeGuard {
+    FreeGuard(char ** theBuffer): buffer(theBuffer) {}
+
+    ~FreeGuard() { std::free(buffer); }
+
+    char ** buffer;
+};
+
+}
+
+OUString osl::detail::backtraceAsString(sal_uInt32 maxDepth) {
+    std::unique_ptr<sal::BacktraceState> backtrace = sal::backtrace_get( maxDepth );
+    return sal::backtrace_to_string( backtrace.get());
+}
+
+std::unique_ptr<sal::BacktraceState> sal::backtrace_get(sal_uInt32 maxDepth)
+{
+    assert(maxDepth != 0);
+    auto const maxInt = static_cast<unsigned int>(
+        std::numeric_limits<int>::max());
+    if (maxDepth > maxInt) {
+        maxDepth = static_cast<sal_uInt32>(maxInt);
+    }
+    auto b1 = new void *[maxDepth];
+    int n = backtrace(b1, static_cast<int>(maxDepth));
+    return std::unique_ptr<BacktraceState>(new BacktraceState{ b1, n });
+}
+
+OUString sal::backtrace_to_string(BacktraceState* backtraceState)
+{
+    FreeGuard b2(backtrace_symbols(backtraceState->buffer, backtraceState->nDepth));
+    if (b2.buffer == nullptr) {
+        return OUString();
+    }
+    OUStringBuffer b3;
+    for (int i = 0; i != backtraceState->nDepth; ++i) {
+        if (i != 0) {
+            b3.append("\n");
+        }
+        b3.append(o3tl::runtimeToOUString(b2.buffer[i]));
+    }
+    return b3.makeStringAndClear();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */