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32-Mem/backtrace.cpp

+#include <cstdlib>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <vector>
+
+// backtrace()
+#include <execinfo.h>
+
+// __cxa_demangle()
+#include <cxxabi.h>
+
+using std::string;
+using std::vector;
+
+vector<string> get_backtrace10() {
+    // backtrace()
+    const int trace_size = 10;
+    void* trace[trace_size];
+    int size = backtrace(trace, trace_size);
+
+    // backtrace_symbols()
+    char** symbols = backtrace_symbols(trace, size);
+
+    vector<string> result(symbols, symbols + size);
+
+    free(symbols);
+
+    return result;
+}
+
+string cut_function_name_part(const string& raw_text) {
+    string::size_type left = raw_text.find("(");
+    string::size_type right = raw_text.find("+", left + 1);
+    return
+        (left == raw_text.npos || right == raw_text.npos)
+        ? ""
+        : raw_text.substr(left + 1, right - left - 1);
+}
+
+string demangle_function_name(const string& mangled) {
+    // __cxa_demangle()
+    int status = 0;
+    char* demangled = abi::__cxa_demangle(mangled.c_str(), 0, 0, &status);
+
+    // demangled
+    string result = demangled ? demangled : mangled;
+    free(demangled);
+
+    if (status != 0) {
+        std::ostringstream oss;
+        oss << " [error:status=" << status << "]";
+        result += oss.str();
+    }
+
+    return result;
+}
+
+void f3() {
+    vector<string> backtrace_texts = get_backtrace10();
+
+    std::cout << "Backtrace:\n";
+
+    for (vector<string>::const_iterator
+            it = backtrace_texts.begin(), end = backtrace_texts.end();
+            it != end;
+            ++it) {
+        string mangled_func_name = cut_function_name_part(*it);
+
+        std::cout
+            << ((!mangled_func_name.empty())
+                    ? demangle_function_name(mangled_func_name)
+                    : "???")
+            << ": " << *it << "\n";
+    }
+}
+
+void f2() { f3(); }
+
+void f1() { f2(); }
+
+int main() { f1(); }