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Get setcontext() and getcontext() working on Aarch64

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This change also adds the missing code for getting and restoring the
thread's signal mask, since that's explicitly listed by the man page
This commit is contained in:
Justine Tunney 2023-07-01 22:42:58 -07:00
parent 8b62bff364
commit 7ec84655b4
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GPG key ID: BE714B4575D6E328
7 changed files with 182 additions and 13 deletions
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25
test/libc/calls/getcontext_test.c
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@ -17,13 +17,13 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/ucontext.h"
#include "libc/runtime/runtime.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#ifdef __x86_64__
int x;
bool ok1;
bool ok2;
@ -51,6 +51,25 @@ TEST(getcontext, test) {
ASSERT_TRUE(ok2);
}
TEST(getcontext, canReadAndWriteSignalMask) {
sigset_t ss, old;
volatile int n = 0;
sigemptyset(&ss);
sigaddset(&ss, SIGUSR1);
sigprocmask(SIG_SETMASK, &ss, &old);
ASSERT_EQ(0, getcontext(&context));
if (!n) {
n = 1;
ASSERT_TRUE(sigismember(&context.uc_sigmask, SIGUSR1));
sigaddset(&context.uc_sigmask, SIGUSR2);
setcontext(&context);
abort();
}
sigprocmask(SIG_SETMASK, 0, &ss);
ASSERT_TRUE(sigismember(&ss, SIGUSR2));
sigprocmask(SIG_SETMASK, &old, 0);
}
void SetGetContext(void) {
static int a;
a = 0;
@ -64,5 +83,3 @@ void SetGetContext(void) {
BENCH(getcontext, bench) {
EZBENCH2("get/setcontext", donothing, SetGetContext());
}
#endif /* __x86_64__ */