Avoid always using an O(n^2) loop over known syscall structures with
strcmp() on each system call. Instead, use a per-ABI cache indexed by
the system call number. The first 1024 system calls (which should cover
all of the normal system calls in currently-supported ABIs) use a flat array
indexed by the system call number to find system call structure. For other
system calls, a linked list of structures storing an integer to structure
mapping is stored in the ABI. The linked list isn't very smart, but it
should only be used by buggy applications invoking unknown system calls.
This also fixes handling of unknown system calls which currently trigger
a NULL pointer dereference.
Reviewed by: kib
MFC after: 2 weeks
ps.paren_indents:
When ps.paren_level was 0, this was accessing paren_indents[-1].
in_buffer:
This fragment checks if "*/" was read, but there's no guarantee that there
is more than one byte in the array (actually, this happens frequently for
the "{" in things like "int main(void) {").
Submitted by: Piotr Stefaniak
When special else-if processing is enabled (-ei), we can assume "else if"
and "if" to be equivalent for indentation purposes.
This reduction saves a lot of stack space in case of a long "if-else-if
... else-if" sequence; with this change,
Postgres/src/bin/psql/tab-complete.c as of 9.6beta3
requires minimum of the stack length to be 31 instead of 444.
Submitted by: Piotr Sephaniak
Teach indent(1) about storage-class specifiers. Don't assume
"in_parameter_declaration" state if "in_decl" hasn't been set. Don't set
"in_decl" for storage-class specifiers.
That set of changes helps with recognizing the difference between file
scope declarations like this:
static LIST_HEAD(, alq) ald_active;
static int ald_shuttingdown = 0;
struct thread *ald_thread;
and old style function declarators like this:
static int
do_execve(td, args, mac_p)
struct thread *td;
struct image_args *args;
struct mac *mac_p;
{
Unfortunately, at the same time this change makes indent(1) require
explicit int in declarations like "static a;", in order to understand that
it's part of a declaration. On the other hand, declarations like in the
first example are no longer indented as if ald_shuttingdown and ald_thread
were parameters of a function named LIST_HEAD.
Submitted by: Piotr Stefaniak
Do not set WARNS, so it gets the current default of 6.
Fix the warnings by sprinkling static, const, or strdup.
Make some constant data tables const. Fix whitespace.
MFC after: 1 week
Sponsored by: Dell EMC
Also, handle signed and unsigned chars, and more gracefully handle
invalid input.
Submitted by: bde in response to r309331
MFC after: 1 week
Sponsored by: Dell EMC
pr_comment() did avoid adding surplus space character when a comment
contained it at the end. Now it's also paying attention to tabs.
Taken from: Piotr Stefaniak
indent.c has a special loop that stores tokens from between an if () and
the next statement into a buffer. The loop ignored all newlines, but that
resulted in not calling dump_line() when it was needed to produce the
final line of the buffered up comment.
Taken from: Piotr Stefaniak
Work-around a somewhat complex interaction within the code. From
Piotr's commit [1]:
When pr_comment() calls dump_line() for the first line of a multiline
comment, it doesn't include any indentation - it starts with the "/*".
This is consistent for both boxed and not boxed comments. Where the logic
diverges is in how it treats the rest of the lines of the comment. For box
comments indent assumes that it must not change anything, so lines are
dumped as they were, including the indentation where it exists. For the
rest of comments, it will first remove the indentation to store plain text
of the comment and then add it again where indent thinks it's appropriate
-- this is part of comment re-indenting process.
For continuations of multi-line comments, the code that handles comments
in dump_line() will use pad_output() to create indentation from the
beginning of the line (what indent calls the first column) and then write
string pointed by s_com afterwards. But if it's a box comment, the string
will include original indentation, unless it's the first line of the
comment. This is why tab characters from s_com have to be considered when
calculating how much padding is needed and the "while (*com_st == '\t')
com_st++, target += 8;" does that.
In dump_line(), /target/ is initially set to ps.com_col, so it always
assumes that indentation needs to be produced in this function, regardless
of which line of a box comment it is. But for the first line of a box
comment it is not true, so pr_comment() signals it by setting
ps.n_comment_delta, the negative comment delta, to a negative number which
is then added to /target/ in dump_line() on all lines except the first
one, so that the function produces adequate indentation in this special
case.
The bug was in how that negative offset was calculated: pr_comment() used
count_spaces() on in_buffer, which pr_comment() expected to contain
non-null terminated sequence of characters, originating from whatever
originally was on the left side of the comment. Understanding that
count_spaces() requires a string, pr_comment() temporarily set buf_ptr[-2]
to 0 in hope that it would nul-terminate the right thing in in_buffer and
calling count_spaces() would be safe and do the expected thing. This was
false whenever buf_ptr would point into save_com, an entirely different
char array than in_buffer.
The short-term fix is to recognize whether buf_ptr points into in_buffer
or save_com.
Reference:
[1]
ea486a2aa3
Taken from: Piotr Stefaniak
This was needed on stable/10. Apparently, sys/param.h supplies CHAR_MAX
on head. Include limits.h anyway, for consistency, and because C says so.
Sponsored by: Dell EMC
when au_user_mask() fails, it's not a failure to set the audit mask,
but to calculate the audit mask -- and hence a condfiguration-file
issue (of some sort).
MFC after: 3 days
Sponsored by: DARPA, AFRL
During the upgrade of clang/llvm etc to 3.9.0 in r309124, the PACKAGE
directive in the usr.bin/clang/*.mk files got dropped accidentally.
Restore it, with a few minor changes and additions:
* Correct license in clang.ucl to NCSA
* Add PACKAGE=clang for clang and most of the "ll" tools
* Put lldb in its own package
* Put lld in its own package
Reviewed by: gjb, jmallett
X-MFC-With: 309124
Differential Revision: https://reviews.freebsd.org/D8666
indent(1) treated the "L" in "L'a'" as if it were an identifier and forced
a space character after it, breaking valid code.
PR: 143090
MFC after: 2 weeks
Multi-line comments are always block comments in KNF. Restore properly,
handling the case when a long one-liner gets wrapped and becomes a
multi-line comment.
Obtained from: Piotr Stefaniak
In C, strchr(3) returns a char*, whereas C++ defines two overloads:
* const char *strchr(const char*, int)
* char *strchr(char*, int)
Building fdt.cc (with the WITHOUT_GPL_DTC knob set) with libc++ 3.9.0 (imported
in r309124) was failing because libc++ r260377 added the first overload to
string.h, leading to failures such as:
fdt.cc:1638:8: error: cannot initialize a variable of type 'char *' with an
rvalue of type 'const char *'
Just define val as a const char* to fix it.
Upstreamed in https://github.com/davidchisnall/dtc/pull/14
Reviewed by: emaste
Approved by: emaste
If set it installs LLD as /usr/bin/ld. LLD (as of version 3.9) is not
capable of linking the world and kernel, but can self-host and link many
substantial applications. GNU ld continues to be used for the world and
kernel build, regardless of how this knob is set.
It is on by default for arm64, and off for all other CPU architectures.
Sponsored by: The FreeBSD Foundation
The "grouping" and "mon_grouping" values are arrays of one-byte
integers, not arrays of ASCII characters. Display them in a format
similar to GNU and MacOS.
MFC after: 3 days
Sponsored by: Dell EMC
sendfile_swapin() loop works this way:
- Find first invalid page in the request.
- Do vm_pager_has_page() and get count of pages, that can be taken in
single I/O.
- Trim valid pages from the end of the request.
- Cycle through the request and substitute to bogus_page all valid
pages that are in the middle of the request.
- After I/O launched (pager copies array of pages into buf(9), it
is important to restore proper page pointers with help vm_page_lookup().
Count bogus pages used and report them in sendfile stats.
An example problem case is 163.1.0.0 (University of Oxford)
which is in an APNIC ERX address range. Previously we assumed
that ARIN has the correct information for all ERX allocations,
but in this case ARIN refers back to APNIC, rather than referring
to RIPE. This caused whois to loop.
Whois will no longer loop back and forth forever between two RIRs
that don't have an answer, but instead try the other RIRs in turn.
As Jean-Sébastien notes, fold(1) requires handling argv-supplied files. That
will require a slightly more sophisticated approach.
Reported by: dumbbell@
Sponsored by: Dell EMC Isilon
Trivially capsicumize some simple programs that just interact with
stdio. This list of programs uses 'pledge("stdio")' in OpenBSD.
No objection from: allanjude, emaste, oshogbo
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D8307
The previous calculation used an approximation which was only valid in
cases where the means being compared were similar; this resulted in very
odd claims being made, e.g. that 0 +/- 0 is a difference of -100% +/- 1%
from 100 +/- 1.
The new calculation scales sample standard deviations by the means, and
yields approximately correct percentage difference bounds providing that
the reference population is bounded away from zero. (In the case where
the values being compared are not sufficiently bounded away from zero,
the distribution of ratios becomes much harder to calculate, and is not
likely to be useful anyway.)
Note that when ministat is used for its intended purpose of determining
whether two samples are statistically different, this change is unlikely
to have any noticeable effect; in such cases the means will be similar
enough that the correction applied here will be minimal.
In r297602, which included a __FreeBSD_version bump to 1100105, we changed
sed 'i' and 'a' from discarding whitespaces to conform with what GNU and
sysvish sed do.
There are arguments in favor of keeping the old behavior but the new
behavior is also useful for migration purposes. It seems important to at
least consider the case of developers depending on the previous behavior,
so add a CFLAG to enable the old behaviour.
PR: 213474
MFC after: 5 days
