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If std descriptor is bound with regular file, redirect it to pseudo terminal before the checkpoint #24

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If std descriptor is bound with regular file, redirect it to pseudo terminal before the checkpoint #24

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c0b4cb5
Close stdin, stderr, stdout fd before checkpoint
Larry-N Jun 15, 2022
452b791
corrections
Larry-N Jun 15, 2022
99d9f2b
corrections
Larry-N Jun 17, 2022
6cf8cb9
jchek corrections
Larry-N Jun 17, 2022
25a6e34
Merge branch 'crac' into stdout-restore
Larry-N Nov 10, 2022
c3347ad
Different approach, if std descriptors bind to a file,
Larry-N Nov 11, 2022
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11 changes: 11 additions & 0 deletions src/hotspot/os/linux/os_linux.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -6207,6 +6207,17 @@ void VM_Crac::doit() {
const char* details = 0 < linkret ? detailsbuf : "";
print_resources("JVM: FD fd=%d type=%s: details1=\"%s\" ",
i, stat2strtype(fds.get_stat(i)->st_mode), details);
if (i < 3) // Check if std descriptors binded to file
{
if (!S_ISCHR(fds.get_stat(i)->st_mode)){
print_resources(" Redirecting std from file to pseudo terminal \n");
int fd_tmp=open("/dev/pts/0", O_WRONLY);
close(i);
dup2(fd_tmp, i);
close(fd_tmp);
continue;
}
}

if (_vm_inited_fds.get_state(i, FdsInfo::CLOSED) != FdsInfo::CLOSED) {
print_resources("OK: inherited from process env\n");
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