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Introduce --strace flag for system call tracing

Browse source 
This is similar to the --ftrace (c function call trace) flag, except
it's less noisy since it only logs system calls to stderr. Having this
flag is valuable because (1) system call tracing tells us a lot about
the behavior of complex programs and (2) it's usually very hard to get
system call tracing on various operating systems, e.g. strace, ktrace,
dtruss, truss, nttrace, etc. Especially on Apple platforms where even
with the special boot trick, debuggers still aren't guaranteed to work.

    make -j8 o//examples
    o//examples/hello.com --strace

This is enabled by default in MODE=, MODE=opt, and MODE=dbg. In MODE=dbg
extra information will be printed.

    make -j8 MODE=dbg o/dbg/examples
    o/dbg/examples/hello.com --strace |& less

This change also changes:

- Rename IsText() → _istext()
- Rename IsUtf8() → _isutf8()
- Fix madvise() on Windows NT
- Fix empty string case of inet_ntop()
- vfork() wrapper now saves and restores errno
- Update xsigaction() to yoink syscall support
This commit is contained in:
Justine Tunney 2022-03-18 18:07:28 -07:00
parent c541225af0
commit 14e192e5ba
138 changed files with 1519 additions and 631 deletions
Download patch file Download diff file Expand all files Collapse all files

27
libc/sock/sock.h
View file

@ -136,31 +136,30 @@ char *inet_ntoa(struct in_addr);
int parseport(const char *);
uint32_t *GetHostIps(void);
int socket(int, int, int) nodiscard;
int accept(int, void *, uint32_t *) nodiscard;
int accept4(int, void *, uint32_t *, int) nodiscard;
int socket(int, int, int);
int accept(int, void *, uint32_t *);
int accept4(int, void *, uint32_t *, int);
int bind(int, const void *, uint32_t);
int connect(int, const void *, uint32_t);
int listen(int, int);
int shutdown(int, int);
int getsockname(int, void *, uint32_t *) paramsnonnull();
int getpeername(int, void *, uint32_t *) paramsnonnull();
ssize_t send(int, const void *, size_t, int) paramsnonnull();
int getsockname(int, void *, uint32_t *);
int getpeername(int, void *, uint32_t *);
ssize_t send(int, const void *, size_t, int);
ssize_t recv(int, void *, size_t, int);
ssize_t recvmsg(int, struct msghdr *, int) paramsnonnull();
ssize_t recvmsg(int, struct msghdr *, int);
ssize_t recvfrom(int, void *, size_t, uint32_t, void *, uint32_t *);
ssize_t sendmsg(int, const struct msghdr *, int) paramsnonnull();
ssize_t sendmsg(int, const struct msghdr *, int);
ssize_t readv(int, const struct iovec *, int);
ssize_t writev(int, const struct iovec *, int);
ssize_t sendfile(int, int, int64_t *, size_t);
int getsockopt(int, int, int, void *, uint32_t *) paramsnonnull((5));
int getsockopt(int, int, int, void *, uint32_t *);
int setsockopt(int, int, int, const void *, uint32_t);
int socketpair(int, int, int, int[2]) paramsnonnull();
int poll(struct pollfd *, uint64_t, int32_t) paramsnonnull();
int socketpair(int, int, int, int[2]);
int poll(struct pollfd *, uint64_t, int32_t);
int ppoll(struct pollfd *, uint64_t, const struct timespec *,
const struct sigset *) paramsnonnull((1, 4));
ssize_t sendto(int, const void *, size_t, uint32_t, const void *, uint32_t)
paramsnonnull((2));
const struct sigset *);
ssize_t sendto(int, const void *, size_t, uint32_t, const void *, uint32_t);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */