--- a/hotspot/src/share/vm/utilities/vmError.cpp Wed Jun 28 20:21:04 2017 +0000
+++ b/hotspot/src/share/vm/utilities/vmError.cpp Wed Jun 28 19:12:58 2017 -0400
@@ -22,7 +22,6 @@
*
*/
-#include <fcntl.h>
#include "precompiled.hpp"
#include "code/codeCache.hpp"
#include "compiler/compileBroker.hpp"
@@ -49,6 +48,26 @@
#include "utilities/events.hpp"
#include "utilities/vmError.hpp"
+#ifndef PRODUCT
+#include <signal.h>
+#endif // PRODUCT
+
+bool VMError::_error_reported = false;
+
+// call this when the VM is dying--it might loosen some asserts
+bool VMError::is_error_reported() { return _error_reported; }
+
+// returns an address which is guaranteed to generate a SIGSEGV on read,
+// for test purposes, which is not NULL and contains bits in every word
+void* VMError::get_segfault_address() {
+ return (void*)
+#ifdef _LP64
+ 0xABC0000000000ABCULL;
+#else
+ 0x00000ABC;
+#endif
+}
+
// List of environment variables that should be reported in error log file.
const char *env_list[] = {
// All platforms
@@ -1259,7 +1278,7 @@
jio_vsnprintf(_detail_msg, sizeof(_detail_msg), detail_fmt, detail_args);
// first time
- set_error_reported();
+ _error_reported = true;
reporting_started();
record_reporting_start_time();
@@ -1574,3 +1593,92 @@
}
+#ifndef PRODUCT
+typedef void (*voidfun_t)();
+// Crash with an authentic sigfpe
+static void crash_with_sigfpe() {
+ // generate a native synchronous SIGFPE where possible;
+ // if that did not cause a signal (e.g. on ppc), just
+ // raise the signal.
+ volatile int x = 0;
+ volatile int y = 1/x;
+#ifndef _WIN32
+ // OSX implements raise(sig) incorrectly so we need to
+ // explicitly target the current thread
+ pthread_kill(pthread_self(), SIGFPE);
+#endif
+} // end: crash_with_sigfpe
+
+// crash with sigsegv at non-null address.
+static void crash_with_segfault() {
+
+ char* const crash_addr = (char*) VMError::get_segfault_address();
+ *crash_addr = 'X';
+
+} // end: crash_with_segfault
+
+void VMError::test_error_handler() {
+ controlled_crash(ErrorHandlerTest);
+}
+
+// crash in a controlled way:
+// how can be one of:
+// 1,2 - asserts
+// 3,4 - guarantee
+// 5-7 - fatal
+// 8 - vm_exit_out_of_memory
+// 9 - ShouldNotCallThis
+// 10 - ShouldNotReachHere
+// 11 - Unimplemented
+// 12,13 - (not guaranteed) crashes
+// 14 - SIGSEGV
+// 15 - SIGFPE
+void VMError::controlled_crash(int how) {
+ if (how == 0) return;
+
+ // If asserts are disabled, use the corresponding guarantee instead.
+ NOT_DEBUG(if (how <= 2) how += 2);
+
+ const char* const str = "hello";
+ const size_t num = (size_t)os::vm_page_size();
+
+ const char* const eol = os::line_separator();
+ const char* const msg = "this message should be truncated during formatting";
+ char * const dataPtr = NULL; // bad data pointer
+ const void (*funcPtr)(void) = (const void(*)()) 0xF; // bad function pointer
+
+ // Keep this in sync with test/runtime/ErrorHandling/ErrorHandler.java
+ switch (how) {
+ case 1: vmassert(str == NULL, "expected null");
+ case 2: vmassert(num == 1023 && *str == 'X',
+ "num=" SIZE_FORMAT " str=\"%s\"", num, str);
+ case 3: guarantee(str == NULL, "expected null");
+ case 4: guarantee(num == 1023 && *str == 'X',
+ "num=" SIZE_FORMAT " str=\"%s\"", num, str);
+ case 5: fatal("expected null");
+ case 6: fatal("num=" SIZE_FORMAT " str=\"%s\"", num, str);
+ case 7: fatal("%s%s# %s%s# %s%s# %s%s# %s%s# "
+ "%s%s# %s%s# %s%s# %s%s# %s%s# "
+ "%s%s# %s%s# %s%s# %s%s# %s",
+ msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
+ msg, eol, msg, eol, msg, eol, msg, eol, msg, eol,
+ msg, eol, msg, eol, msg, eol, msg, eol, msg);
+ case 8: vm_exit_out_of_memory(num, OOM_MALLOC_ERROR, "ChunkPool::allocate");
+ case 9: ShouldNotCallThis();
+ case 10: ShouldNotReachHere();
+ case 11: Unimplemented();
+ // There's no guarantee the bad data pointer will crash us
+ // so "break" out to the ShouldNotReachHere().
+ case 12: *dataPtr = '\0'; break;
+ // There's no guarantee the bad function pointer will crash us
+ // so "break" out to the ShouldNotReachHere().
+ case 13: (*funcPtr)(); break;
+ case 14: crash_with_segfault(); break;
+ case 15: crash_with_sigfpe(); break;
+
+ default: tty->print_cr("ERROR: %d: unexpected test_num value.", how);
+ }
+ ShouldNotReachHere();
+}
+#endif // !PRODUCT
+