[external/backtrace] Added backtrace printer tool.

2021-05-17 16:15:29 +02:00 · 2021-05-17 16:15:29 +02:00 · 4aa92eb337
commit 4aa92eb337
parent eaae61f01b
1 changed files with 87 additions and 0 deletions
--- a/external/backtrace.hpp
+++ b/external/backtrace.hpp
@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2009-2017, Farooq Mela
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef BACKTRACE_HPP_
+#define BACKTRACE_HPP_
+
+#include <cstdio>
+#include <string>
+
+#ifdef _WIN32
+static std::string Backtrace(int skip = 1)
+{
+	std::string buf = "Backtrace is not available on Windows.";
+	printf("%s\n", buf.c_str());
+	return buf;
+}
+#else
+
+#include <execinfo.h> // for backtrace
+#include <dlfcn.h>    // for dladdr
+#include <cxxabi.h>   // for __cxa_demangle
+
+#include <cstdlib>
+#include <sstream>
+
+// This function produces a stack backtrace with demangled function & method names.
+// Needs compilation with --export-dynamic or -Wl,-export-dynamic
+// From https://gist.github.com/fmela/591333
+static std::string Backtrace(int skip = 1)
+{
+    void *callstack[128];
+    const int nMaxFrames = sizeof(callstack) / sizeof(callstack[0]);
+    char buf[1024];
+    int nFrames = backtrace(callstack, nMaxFrames);
+    char **symbols = backtrace_symbols(callstack, nFrames);
+
+    std::ostringstream trace_buf;
+    for (int i = skip; i < nFrames; i++) {
+        printf("%s\n", symbols[i]);
+
+        Dl_info info;
+        if (dladdr(callstack[i], &info) && info.dli_sname) {
+            char *demangled = NULL;
+            int status = -1;
+            if (info.dli_sname[0] == '_')
+                demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
+            snprintf(buf, sizeof(buf), "%-3d %*p %s + %zd\n",
+                     i, int(2 + sizeof(void*) * 2), callstack[i],
+                     status == 0 ? demangled :
+                     info.dli_sname == 0 ? symbols[i] : info.dli_sname,
+                     (char *)callstack[i] - (char *)info.dli_saddr);
+            free(demangled);
+        } else {
+            snprintf(buf, sizeof(buf), "%-3d %*p %s\n",
+                     i, int(2 + sizeof(void*) * 2), callstack[i], symbols[i]);
+        }
+        trace_buf << buf;
+    }
+    free(symbols);
+    if (nFrames == nMaxFrames)
+        trace_buf << "[truncated]\n";
+    return trace_buf.str();
+}
+
+#endif // _WIN32
+
+#endif // BACKTRACE_HPP_