diff options
Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/834.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/834.toml | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/834.toml b/gitlab/issues/target_missing/host_missing/accel_missing/834.toml deleted file mode 100644 index 0a0b0b35f..000000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/834.toml +++ /dev/null @@ -1,69 +0,0 @@ -id = 834 -title = "linux-user: fails to deliver signals raised during pselect" -state = "closed" -created_at = "2022-01-23T01:02:55.512Z" -closed_at = "2022-03-24T20:08:18.931Z" -labels = ["Closed::Fixed", "kind::Bug", "linux-user"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/834" -host-os = "NixOS" -host-arch = "x86_64" -qemu-version = "qemu-x86_64 version 6.2.50 (v6.2.0-1117-gaeb0ae95b7)" -guest-os = "n/a" -guest-arch = "n/a" -description = """When run via qemu a program which blocks signals but unmasks them during `pselect` does not catch these signals when returning from `pselect`. - -Used as reference on expected behavior: [The new pselect() system call](https://lwn.net/Articles/176911/)""" -reproduce = """A minimal test case below mimics behavior as encountered in the test suite of `p11-kit` ([link](https://github.com/p11-glue/p11-kit)) (which attempts to catch `SIGTERM` in a similar way and results in lingering processes after running the test suite). - -```C -#include <stdio.h> -#include <unistd.h> -#include <signal.h> -#include <sys/select.h> - -static void handler(int sig) -{ -\tputs("SIGNAL"); -} - -int main(int argc, char *argv[]) -{ -\tstruct sigaction sa; - -\tfd_set rfds; -\tsigset_t emptyset, blockset; - -\tsigemptyset (&blockset); -\tsigemptyset (&emptyset); -\tsigaddset (&blockset, SIGUSR1); - -\tsa.sa_handler = handler; -\tsigemptyset(&sa.sa_mask); -\tsa.sa_flags = 0; -\tsigaction(SIGUSR1, &sa, NULL); - -\tsigprocmask (SIG_BLOCK, &blockset, NULL); - -\tFD_ZERO(&rfds); - -\twhile(1) { -\t\tpselect(0, &rfds, NULL, NULL, NULL, &emptyset); -\t} - -\treturn 0; -} -``` - -Running this without qemu should print _SIGNAL_ when sent `SIGUSR1`: - -``` -$ ./a.out & -[1] 1683587 -$ kill -USR1 %1 -$ SIGNAL -``` - -When run with `qemu-x86_64` however, it does not (also qemu's `-strace` confirms the signal isn't received whereas a strace of qemu shows it's in fact delivered). - -The pselect call itself _is_ interrupted, but the signal goes missing.""" -additional = "n/a" |