mirror of
https://github.com/clearlinux/graphene.git
synced 2026-09-03 12:21:37 +00:00
borysp
c24bddd5aa
Change log (most important only):
- unify CPU context structures - now we have only one version -
`PAL_CONTEXT` - which is shared between LibOS and PALs and it should
depend only on the host architecture (not OS),
- syscalls emulation changed:
- dedicated LibOS stack is now used for syscalls emulation,
- removed one indirection level in syscalls table - now it stores
`shim_do_*` functions directly,
- signal handling - completely rewritten:
- all signal queues use proper locking schemes now,
- signals are handled *only* when returning to the user app from LibOS
or PAL,
- nested signals are now possible,
- the app is allowed to jump out of signal handler with the same
sematics as on normal Linux,
- signal altstack is now fully supported,
- syscall restarting is now supported,
- doing a backtrace from the signal handler works properly,
- disallow injecting host-level signals, with one exception, see
`sys.enable_sigterm_injection` manifest option for more details.
32 lines
690 B
C
32 lines
690 B
C
#include <stdbool.h>
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#include "pal.h"
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#include "pal_debug.h"
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#include "pal_error.h"
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int handled = 0;
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static void FailureHandler(bool is_in_pal, PAL_NUM arg, PAL_CONTEXT* context) {
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__UNUSED(is_in_pal);
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pal_printf("Failure notified: %s\n", pal_strerror((unsigned long)arg));
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handled = 1;
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}
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int main(int argc, char** argv, char** envp) {
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pal_printf("Enter Main Thread\n");
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DkSetExceptionHandler(FailureHandler, PAL_EVENT_FAILURE);
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PAL_HANDLE out = DkStreamOpen("foo:unknown", PAL_ACCESS_WRONLY, 0, 0, 0);
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if (!out && !handled) {
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pal_printf("DkStreamOpen failed\n");
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return -1;
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}
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pal_printf("Leave Main Thread\n");
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return 0;
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}
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