Mercurial > hg > truffle
diff src/os/linux/vm/perfMemory_linux.cpp @ 2103:e24ab3fa6aaf hs20-b06 jdk7-b125
Merge
author | trims |
---|---|
date | Fri, 07 Jan 2011 22:56:35 -0800 |
parents | 02895c6a2f82 |
children | d2a62e0f25eb |
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--- a/src/os/linux/vm/perfMemory_linux.cpp Fri Jan 07 22:42:10 2011 -0800 +++ b/src/os/linux/vm/perfMemory_linux.cpp Fri Jan 07 22:56:35 2011 -0800 @@ -635,7 +635,29 @@ return -1; } - return fd; + // Verify that we have enough disk space for this file. + // We'll get random SIGBUS crashes on memory accesses if + // we don't. + + for (size_t seekpos = 0; seekpos < size; seekpos += os::vm_page_size()) { + int zero_int = 0; + result = (int)os::seek_to_file_offset(fd, (jlong)(seekpos)); + if (result == -1 ) break; + RESTARTABLE(::write(fd, &zero_int, 1), result); + if (result != 1) { + if (errno == ENOSPC) { + warning("Insufficient space for shared memory file:\n %s\nTry using the -Djava.io.tmpdir= option to select an alternate temp location.\n", filename); + } + break; + } + } + + if (result != -1) { + return fd; + } else { + RESTARTABLE(::close(fd), result); + return -1; + } } // open the shared memory file for the given user and vmid. returns