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Add torture test for zipos file descriptors

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This change hardens the code for opening /zip/ files using the system
call interface. Thread safety and signal safety has been improved for
file descriptors in general. We now document fixed addresses that are
needed for low level allocations.
This commit is contained in:
Justine Tunney 2022-06-15 16:19:50 -07:00
parent 579080cd4c
commit e466dd0553
44 changed files with 2981 additions and 307 deletions
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27
libc/linux/futex.h Normal file
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#ifndef COSMOPOLITAN_LIBC_LINUX_FUTEX_H_
#define COSMOPOLITAN_LIBC_LINUX_FUTEX_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
#include "libc/calls/struct/timespec.h"
forceinline int LinuxFutexWait(void *addr, int expect,
struct timespec *timeout) {
int ax;
register void *r10 asm("r10") = timeout;
asm volatile("syscall"
: "=a"(ax)
: "0"(202), "D"(addr), "S"(0), "d"(expect), "r"(r10)
: "rcx", "r11", "memory");
return ax;
}
forceinline int LinuxFutexWake(void *addr, int count) {
int ax;
asm volatile("syscall"
: "=a"(ax)
: "0"(202), "D"(addr), "S"(1), "d"(count)
: "rcx", "r11", "memory");
return ax;
}
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_LINUX_FUTEX_H_ */