TYPE3

[iec.git] / src / type3_AndroidCloud / anbox-master / external / process-cpp-minimal / src / core / posix / backtrace.cpp

diff --git a/src/type3_AndroidCloud/anbox-master/external/process-cpp-minimal/src/core/posix/backtrace.cpp b/src/type3_AndroidCloud/anbox-master/external/process-cpp-minimal/src/core/posix/backtrace.cpp
new file mode 100644 (file)
index 0000000..7a02bbd
--- /dev/null
+++ b/src/type3_AndroidCloud/anbox-master/external/process-cpp-minimal/src/core/posix/backtrace.cpp
@@ -0,0 +1,153 @@
+/*
+ * Copyright © 2014 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authored by: Thomas Voß <thomas.voss@canonical.com>
+ */
+
+#include "backtrace.h"
+
+#include <cxxabi.h>
+
+#include <execinfo.h>
+
+namespace bt = core::posix::backtrace;
+
+namespace impl
+{
+std::tuple<std::string, bool> demangle(const std::string& symbol)
+{
+    int status = 1;
+    auto result = abi::__cxa_demangle(symbol.c_str(),
+                                      nullptr,
+                                      nullptr,
+                                      &status);
+
+    if (!result || status != 0)
+    {
+        return std::make_tuple(std::string(), false);
+    }
+
+    std::string s{result};
+    ::free(result);
+
+    return std::make_tuple(s, true);
+}
+
+struct Frame : public bt::Frame
+{
+    struct Symbol : public bt::Frame::Symbol
+    {
+        Symbol(const char* symbol) : raw_(symbol)
+        {
+            auto first = raw_.find_first_of("(");
+            auto last = raw_.find_last_of(")");
+
+            if (first != std::string::npos && last != std::string::npos)
+            {
+                auto mangled_symbol = raw_.substr(first+1,
+                                                  (last-1) - (first+1));
+
+                auto plus = mangled_symbol.find_first_of("+");
+                if (plus != std::string::npos)
+                    mangled_symbol.erase(plus);
+
+                std::tie(demangled_, is_cxx_) = demangle(mangled_symbol);
+                if (!is_cxx_)
+                    demangled_ = raw_;
+            }
+        }
+
+        bool is_cxx() const
+        {
+            return is_cxx_;
+        }
+
+        std::string demangled() const
+        {
+            return demangled_;
+        }
+
+        std::string raw() const
+        {
+            return raw_;
+        }
+
+        std::string raw_;
+        std::string demangled_;
+        bool is_cxx_ = false;
+    };
+
+    std::size_t depth_;
+    void* frame_pointer_;
+    Symbol symbol_;
+
+    Frame(std::size_t depth, void* frame_pointer, const char* symbol)
+        : depth_(depth),
+          frame_pointer_(frame_pointer),
+          symbol_(symbol)
+    {
+    }
+
+    std::size_t depth() const
+    {
+        return depth_;
+    }
+
+    virtual void* frame_pointer() const
+    {
+        return frame_pointer_;
+    }
+
+    const Symbol& symbol() const
+    {
+        return symbol_;
+    }
+};
+}
+
+std::shared_ptr<bt::Frame::Symbol> bt::Frame::Symbol::for_testing_from_raw_symbol(const char* symbol)
+{
+    return std::shared_ptr<bt::Frame::Symbol>(new impl::Frame::Symbol(symbol));
+}
+
+void bt::visit_with_handler(const bt::FrameHandler& handler)
+{
+    static const unsigned int max_frames=64;
+    void *frames[max_frames];
+
+    auto frame_count = ::backtrace(frames, max_frames);
+    auto symbols = ::backtrace_symbols(frames, frame_count);
+
+    struct Scope
+    {
+        Scope(char** symbols) : symbols(symbols)
+        {
+        }
+
+        ~Scope()
+        {
+            ::free(symbols);
+        }
+
+        char** symbols = nullptr;
+    } scope{symbols};
+
+    for (int i = 0; i < frame_count; i++)
+    {
+        impl::Frame frame(i, frames[i], symbols[i]);
+        if (!handler(frame))
+            return;
+    }
+}