Use libdl to get symbols for backtraces

src/base/logging.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/logging.h"
 
 #if V8_LIBC_GLIBC || V8_OS_BSD
-# include <cxxabi.h>
-# include <execinfo.h>
+#include <cxxabi.h>
+#include <dlfcn.h>
+#include <execinfo.h>
 #elif V8_OS_QNX
-# include <backtrace.h>
+#include <backtrace.h>
 #endif  // V8_LIBC_GLIBC || V8_OS_BSD
 
 #include <cstdio>
 #include <cstdlib>
 
 #include "src/base/platform/platform.h"
 
 namespace v8 {
 namespace base {
 
@@ skipping 25 matching lines @@
 DEFINE_CHECK_OP_IMPL(GE)
 DEFINE_CHECK_OP_IMPL(GT)
 #undef DEFINE_CHECK_OP_IMPL
 
 
 // Attempts to dump a backtrace (if supported).
 void DumpBacktrace() {
 #if V8_LIBC_GLIBC || V8_OS_BSD
   void* trace[100];
   int size = backtrace(trace, arraysize(trace));
-  char** symbols = backtrace_symbols(trace, size);
   OS::PrintError("\n==== C stack trace ===============================\n\n");
   if (size == 0) {
     OS::PrintError("(empty)\n");
-  } else if (symbols == NULL) {
-    OS::PrintError("(no symbols)\n");
   } else {
     for (int i = 1; i < size; ++i) {
       OS::PrintError("%2d: ", i);
-      char mangled[201];
-      if (sscanf(symbols[i], "%*[^(]%*[(]%200[^)+]", mangled) == 1) {  // NOLINT
-        int status;
-        size_t length;
-        char* demangled = abi::__cxa_demangle(mangled, NULL, &length, &status);
-        OS::PrintError("%s\n", demangled != NULL ? demangled : mangled);
+      Dl_info info;
+      char* demangled = NULL;
+      if (!dladdr(trace[i], &info) || !info.dli_sname) {
+        OS::PrintError("%p\n", trace[i]);
+      } else if ((demangled = abi::__cxa_demangle(info.dli_sname, 0, 0, 0))) {
+        OS::PrintError("%s\n", demangled);
         free(demangled);
       } else {
-        OS::PrintError("??\n");
+        OS::PrintError("%s\n", info.dli_sname);
       }
     }
   }
-  free(symbols);
 #elif V8_OS_QNX
   char out[1024];
   bt_accessor_t acc;
   bt_memmap_t memmap;
   bt_init_accessor(&acc, BT_SELF);
   bt_load_memmap(&acc, &memmap);
   bt_sprn_memmap(&memmap, out, sizeof(out));
   OS::PrintError(out);
   bt_addr_t trace[100];
   int size = bt_get_backtrace(&acc, trace, arraysize(trace));
@@ skipping 22 matching lines @@
                            line);
   va_list arguments;
   va_start(arguments, format);
   v8::base::OS::VPrintError(format, arguments);
   va_end(arguments);
   v8::base::OS::PrintError("\n#\n");
   v8::base::DumpBacktrace();
   fflush(stderr);
   v8::base::OS::Abort();
 }