# HG changeset patch # User fparain # Date 1372669999 0 # Node ID 270ef05ebce82f49cbaf0b1dde14710b62032ada # Parent 77d72199179d1e833bc1e483a21ad2f136494f4d 7060111: race condition in VMError::report_and_die() Reviewed-by: zgu, coleenp Contributed-by: volker.simonis@gmail.com diff -r 77d72199179d -r 270ef05ebce8 hotspot/src/share/vm/utilities/vmError.cpp --- a/hotspot/src/share/vm/utilities/vmError.cpp Sun Jun 30 09:59:08 2013 -0400 +++ b/hotspot/src/share/vm/utilities/vmError.cpp Mon Jul 01 09:13:19 2013 +0000 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -799,6 +799,14 @@ VMError* volatile VMError::first_error = NULL; volatile jlong VMError::first_error_tid = -1; +// An error could happen before tty is initialized or after it has been +// destroyed. Here we use a very simple unbuffered fdStream for printing. +// Only out.print_raw() and out.print_raw_cr() should be used, as other +// printing methods need to allocate large buffer on stack. To format a +// string, use jio_snprintf() with a static buffer or use staticBufferStream. +fdStream VMError::out(defaultStream::output_fd()); +fdStream VMError::log; // error log used by VMError::report_and_die() + /** Expand a pattern into a buffer starting at pos and open a file using constructed path */ static int expand_and_open(const char* pattern, char* buf, size_t buflen, size_t pos) { int fd = -1; @@ -853,13 +861,6 @@ // Don't allocate large buffer on stack static char buffer[O_BUFLEN]; - // An error could happen before tty is initialized or after it has been - // destroyed. Here we use a very simple unbuffered fdStream for printing. - // Only out.print_raw() and out.print_raw_cr() should be used, as other - // printing methods need to allocate large buffer on stack. To format a - // string, use jio_snprintf() with a static buffer or use staticBufferStream. - static fdStream out(defaultStream::output_fd()); - // How many errors occurred in error handler when reporting first_error. static int recursive_error_count; @@ -868,7 +869,6 @@ static bool out_done = false; // done printing to standard out static bool log_done = false; // done saving error log static bool transmit_report_done = false; // done error reporting - static fdStream log; // error log // disble NMT to avoid further exception MemTracker::shutdown(MemTracker::NMT_error_reporting); diff -r 77d72199179d -r 270ef05ebce8 hotspot/src/share/vm/utilities/vmError.hpp --- a/hotspot/src/share/vm/utilities/vmError.hpp Sun Jun 30 09:59:08 2013 -0400 +++ b/hotspot/src/share/vm/utilities/vmError.hpp Mon Jul 01 09:13:19 2013 +0000 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -96,6 +96,9 @@ return (id != OOM_MALLOC_ERROR) && (id != OOM_MMAP_ERROR); } + static fdStream out; + static fdStream log; // error log used by VMError::report_and_die() + public: // Constructor for crashes