libsanitizer/sanitizer_common/sanitizer_common_libcdep.cc

   1 //===-- sanitizer_common_libcdep.cc ---------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is shared between AddressSanitizer and ThreadSanitizer
   9 // run-time libraries.
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "sanitizer_common.h"
  13 #include "sanitizer_flags.h"
  14 #include "sanitizer_stacktrace.h"
  15 #include "sanitizer_symbolizer.h"
  16
  17 namespace __sanitizer {
  18
  19 bool PrintsToTty() {
  20   MaybeOpenReportFile();
  21   return internal_isatty(report_fd) != 0;
  22 }
  23
  24 bool PrintsToTtyCached() {
  25   // FIXME: Add proper Windows support to AnsiColorDecorator and re-enable color
  26   // printing on Windows.
  27   if (SANITIZER_WINDOWS)
  28     return 0;
  29
  30   static int cached = 0;
  31   static bool prints_to_tty;
  32   if (!cached) {  // Not thread-safe.
  33     prints_to_tty = PrintsToTty();
  34     cached = 1;
  35   }
  36   return prints_to_tty;
  37 }
  38
  39 bool ColorizeReports() {
  40   const char *flag = common_flags()->color;
  41   return internal_strcmp(flag, "always") == 0 ||
  42          (internal_strcmp(flag, "auto") == 0 && PrintsToTtyCached());
  43 }
  44
  45 static void (*sandboxing_callback)();
  46 void SetSandboxingCallback(void (*f)()) {
  47   sandboxing_callback = f;
  48 }
  49
  50 void ReportErrorSummary(const char *error_type, StackTrace *stack) {
  51   if (!common_flags()->print_summary)
  52     return;
  53   AddressInfo ai;
  54 #if !SANITIZER_GO
  55   if (stack->size > 0 && Symbolizer::GetOrInit()->CanReturnFileLineInfo()) {
  56     // Currently, we include the first stack frame into the report summary.
  57     // Maybe sometimes we need to choose another frame (e.g. skip memcpy/etc).
  58     uptr pc = StackTrace::GetPreviousInstructionPc(stack->trace[0]);
  59     Symbolizer::GetOrInit()->SymbolizePC(pc, &ai, 1);
  60   }
  61 #endif
  62   ReportErrorSummary(error_type, ai.file, ai.line, ai.function);
  63 }
  64
  65 }  // namespace __sanitizer
  66
  67 void NOINLINE
  68 __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args) {
  69   PrepareForSandboxing(args);
  70   if (sandboxing_callback)
  71     sandboxing_callback();
  72 }