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7007769: VM crashes with SIGBUS writing PerfData if tmp space is full

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Fill perfdata file with zeros to verify available disk space

Reviewed-by: coleenp, kamg
This commit is contained in:
Bob Vandette 2010-12-20 14:30:24 -05:00
parent 2540ccd05f
commit 178b7bb4c1
1 changed files with 23 additions and 1 deletions
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24
hotspot/src/os/linux/vm/perfMemory_linux.cpp
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@ -635,7 +635,29 @@ static int create_sharedmem_resources(const char* dirname, const char* filename,
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