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Use a switch instead of a simple condition in force_interface_symbols(). 

Otherwise Clang eliminates everything after the first interface symbol that is marked noreturn.

llvm-svn: 161573
This commit is contained in:
Alexander Potapenko 2012-08-09 09:46:12 +00:00
parent 65b9acf0af
commit ba6174889c
1 changed files with 19 additions and 17 deletions
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36
compiler-rt/lib/asan/asan_rtl.cc
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@ -236,23 +236,25 @@ ASAN_REPORT_ERROR(store, true, 16)
// time.
static NOINLINE void force_interface_symbols() {
volatile int fake_condition = 0; // prevent dead condition elimination.
if (fake_condition) {
__asan_report_load1(0);
__asan_report_load2(0);
__asan_report_load4(0);
__asan_report_load8(0);
__asan_report_load16(0);
__asan_report_store1(0);
__asan_report_store2(0);
__asan_report_store4(0);
__asan_report_store8(0);
__asan_report_store16(0);
__asan_register_global(0, 0, 0);
__asan_register_globals(0, 0);
__asan_unregister_globals(0, 0);
__asan_set_death_callback(0);
__asan_set_error_report_callback(0);
__asan_handle_no_return();
// __asan_report_* functions are noreturn, so we need a switch to prevent
// the compiler from removing any of them.
switch (fake_condition) {
case 1: __asan_report_load1(0); break;
case 2: __asan_report_load2(0); break;
case 3: __asan_report_load4(0); break;
case 4: __asan_report_load8(0); break;
case 5: __asan_report_load16(0); break;
case 6: __asan_report_store1(0); break;
case 7: __asan_report_store2(0); break;
case 8: __asan_report_store4(0); break;
case 9: __asan_report_store8(0); break;
case 10: __asan_report_store16(0); break;
case 11: __asan_register_global(0, 0, 0); break;
case 12: __asan_register_globals(0, 0); break;
case 13: __asan_unregister_globals(0, 0); break;
case 14: __asan_set_death_callback(0); break;
case 15: __asan_set_error_report_callback(0); break;
case 16: __asan_handle_no_return(); break;
}
}