Processes should reasonably be able to expect their children to abort
with typical exit codes, rather than a debugger breakpoint signal. This
flag in the PEB is what would be checked by `IsDebuggerPresent` in
kernel32, which is the function you would typically use for this
purpose.
This fixes `test-stack-trace` failures on Windows, as these tests were
expecting exit code 3 to indicate abort.
Our usage of `ucontext_t` in the standard library was kind of
problematic. We unnecessarily mimiced libc-specific structures, and our
`getcontext` implementation was overkill for our use case of stack
tracing.
This commit introduces a new namespace, `std.debug.cpu_context`, which
contains "context" types for various architectures (currently x86,
x86_64, ARM, and AARCH64) containing the general-purpose CPU registers;
the ones needed in practice for stack unwinding. Each implementation has
a function `current` which populates the structure using inline
assembly. The structure is user-overrideable, though that should only be
necessary if the standard library does not have an implementation for
the *architecture*: that is to say, none of this is OS-dependent.
Of course, in POSIX signal handlers, we get a `ucontext_t` from the
kernel. The function `std.debug.cpu_context.fromPosixSignalContext`
converts this to a `std.debug.cpu_context.Native` with a big ol' target
switch.
This functionality is not exposed from `std.c` or `std.posix`, and
neither are `ucontext_t`, `mcontext_t`, or `getcontext`. The rationale
is that these types and functions do not conform to a specific ABI, and
in fact tend to get updated over time based on CPU features and
extensions; in addition, different libcs use different structures which
are "partially compatible" with the kernel structure. Overall, it's a
mess, but all we need is the kernel context, so we can just define a
kernel-compatible structure as long as we don't claim C compatibility by
putting it in `std.c` or `std.posix`.
This change resulted in a few nice `std.debug` simplifications, but
nothing too noteworthy. However, the main benefit of this change is that
DWARF unwinding---sometimes necessary for collecting stack traces
reliably---now requires far less target-specific integration.
Also fix a bug I noticed in `PageAllocator` (I found this due to a bug
in my distro's QEMU distribution; thanks, broken QEMU patch!) and I
think a couple of minor bugs in `std.debug`.
Resolves: #23801Resolves: #23802
When not linking libc on 64-bit Linux and calling posix.setsid(),
we get a type error at compile time inside of posix.errno(). This
is because posix.errno()'s non-libc branch expects a usize-sized
value, which is what all the error-returning os.linux syscalls
return, and linux.setsid() instead returned a pid_t, which is only
32 bits wide.
This and the other 3 pid-related calls just below it (getpid(),
getppid(), and gettid()) are the only Linux syscall examples here
that are casting their return values to pid_t. For the other 3
this makes sense: those calls are documented to have no possible
errors and always return a valid pid_t value.
However, setsid() actually can return the error EPERM, and
therefore needs to return the raw value from syscall0 for
posix.errno() to process like normal.
Additionally, posix.setsid() needs an @intCast(rc) for the success
case as a result, like most other such cases.
Because these lists are very long in several cases and quite
varied, I opted to place them in the existing c/foo.zig files.
There are many other sets of network-related constants like this
to add over time across all the OSes. For now I picked these
because I needed a few constants from each of these namespaces for
my own project, so I tried to flesh out these namespaces
completely as best I could, at least for basic sockopt purposes.
Note windows has some of these already defined in ws2_32 as
individual constants rather than contained in a namespacing
struct. I'm not sure what to do with that in the long run (break
it and namespace them?), but this doesn't change the status quo
for windows in any case.
in_pktinfo is only used on a few targets for the IP_PKTINFO
sockopt, as many BSDs use an alternate mechanism (IP_RECVDSTADDR)
that doesn't require a special struct. in6_pktinfo is more
universal.
Also, added EPIPE to recvfrom() error set (it's a documented error
for unix and tcp sockets, at least), which recvmsg() largely
shares. Windows has an odd, callback-based form of recvmsg() that
doesn't fit the normal interface here.
socketpair is something like a pipe2() for sockets, and generally
only works for AF_UNIX sockets for most platforms. Winsock2
explicitly does not support this call, even though it does have
AF_UNIX sockets.
Linux already gained the relevant syscalls and consts in #24473
The basic mlock() and munlock() are fairly universal across the
*nix world with a consistent interface, but are missing on wasi
and windows.
The mlockall() and munlockall() calls are not as widely supported
as the basic ones. Notable non-implementers include darwin,
haiku, and serenity (and of course wasi and windows again).
mlock2() is Linux-only, as are its MLOCK flags.
Unlike all other platforms where RDONLY is 0 it does not work as a
default for the O flags on serenity - various syscalls other than
'open', e.g. 'pipe', return EINVAL if unexpected bits are set in the
flags.
* std.os.uefi.tables: ziggify boot and runtime services
* avoid T{} syntax
Co-authored-by: linusg <mail@linusgroh.de>
* misc fixes
* work
* self-review quickfixes
* dont make MemoryMapSlice generic
* more review fixes, work
* more work
* more work
* review fixes
* update boot/runtime services references throughout codebase
* self-review fixes
* couple of fixes i forgot to commit earlier
* fixes from integrating in my own project
* fixes from refAllDeclsRecursive
* Apply suggestions from code review
Co-authored-by: truemedian <truemedian@gmail.com>
* more fixes from review
* fixes from project integration
* make natural alignment of Guid align-8
* EventRegistration is a new opaque type
* fix getNextHighMonotonicCount
* fix locateProtocol
* fix exit
* partly revert 7372d65
* oops exit data_len is num of bytes
* fixes from project integration
* MapInfo consistency, MemoryType update per review
* turn EventRegistration back into a pointer
* forgot to finish updating MemoryType methods
* fix IntFittingRange calls
* set uefi.Page nat alignment
* Back out "set uefi.Page nat alignment"
This backs out commit cdd9bd6f7f5fb763f994b8fbe3e1a1c2996a2393.
* get rid of some error.NotFound-s
* fix .exit call in panic
* review comments, add format method
* fix resetSystem data alignment
* oops, didnt do a final refAllDeclsRecursive i guess
* review comments
* writergate update MemoryType.format
* fix rename
---------
Co-authored-by: linusg <mail@linusgroh.de>
Co-authored-by: truemedian <truemedian@gmail.com>
added adapter to AnyWriter and GenericWriter to help bridge the gap
between old and new API
make std.testing.expectFmt work at compile-time
std.fmt no longer has a dependency on std.unicode. Formatted printing
was never properly unicode-aware. Now it no longer pretends to be.
Breakage/deprecations:
* std.fs.File.reader -> std.fs.File.deprecatedReader
* std.fs.File.writer -> std.fs.File.deprecatedWriter
* std.io.GenericReader -> std.io.Reader
* std.io.GenericWriter -> std.io.Writer
* std.io.AnyReader -> std.io.Reader
* std.io.AnyWriter -> std.io.Writer
* std.fmt.format -> std.fmt.deprecatedFormat
* std.fmt.fmtSliceEscapeLower -> std.ascii.hexEscape
* std.fmt.fmtSliceEscapeUpper -> std.ascii.hexEscape
* std.fmt.fmtSliceHexLower -> {x}
* std.fmt.fmtSliceHexUpper -> {X}
* std.fmt.fmtIntSizeDec -> {B}
* std.fmt.fmtIntSizeBin -> {Bi}
* std.fmt.fmtDuration -> {D}
* std.fmt.fmtDurationSigned -> {D}
* {} -> {f} when there is a format method
* format method signature
- anytype -> *std.io.Writer
- inferred error set -> error{WriteFailed}
- options -> (deleted)
* std.fmt.Formatted
- now takes context type explicitly
- no fmt string
For C code the macros SIGRTMIN and SIGRTMAX provide these values. In
practice what looks like a constant is actually provided by a libc call.
So the Zig implementations are explicitly function calls.
glibc (and Musl) export a run-time minimum "real-time" signal number,
based on how many signals are reserved for internal implementation details
(generally threading). In practice, on Linux, sigrtmin() is 35 on glibc
with the older LinuxThread and 34 with the newer NPTL-based
implementation. Musl always returns 35. The maximum "real-time" signal
number is NSIG - 1 (64 on most Linux kernels, but 128 on MIPS).
When not linking a C Library, Zig can report the full range of "rt"
signals (none are reserved by Zig).
Fixes#21189
By returning an initialized sigset (instead of taking the set as an output
parameter), these functions can be used to directly initialize the `mask`
parameter of a `Sigaction` instance.
When linking a libc, Zig should defer to the C library for sigset
operations. The pre-filled constants signal sets (empty_sigset,
filled_sigset) are not compatible with C library initialization, so remove
them and use the runtime `sigemptyset` and `sigfillset` methods to
initialize any sigset.
Unify the C library sigset_t and Linux native sigset_t and the accessor
operations.
Add tests that the various sigset_t operations are working. And clean up
existing tests a bit.
Add a test for std.fs.File's `setEndPos` (which is a simple wrapper around
`std.posix.ftruncate`) to exercise some success and failure paths.
Explicitly check that the `ftruncate` length isn't negative when
interpreted as a signed value. This avoids having to decode overloaded
`EINVAL` errors.
Add errno handling to Windows path to map INVALID_PARAMETER to FileTooBig.
Fixes#22960
