This avoids the issue https://github.com/Ravenbrook/mps/issues/210
Also increase the number of test objects by *10 to make it more likely
the arena will decide to contract.
Also comment out some printfs in the interrupt context, to avoid messy
output.
Also fix some typos in comments
* Move type and macro declarations to the public header mps.h.
* Move documentation to appropriate sections of manual.
(cherry picked from commit b928fa236178fb1bdbe20442c3f53b8e8a545a4b)
On Apple Silicon, when Hardened Runtime is in force and the
application lacks the "Allow Unsigned Executable Memory Entitlement",
mmap and mprotect return EACCES when an attempt is made to create or
modify memory so that it is simultaneously writable and executable.
This commit handles these cases by retrying the operation without the
PROT_EXEC flag, and setting global variables so that future operations
omit the flag.
This will allow us to reuse the scanning protocol with an arbitrary area
scanning function (replacing traceFormatScan) in order to implement
formatted object walking without an extra segment method.
Don't insist on scanning only grey segments: we want to be able to
reuse the scan protocol for walking, when the segments are black.
Git version 2.32 added the backwards-incompatible "feature" that
.gitignore files that are symbolic links are ignored. Since all our
.gitignore files are symbolic links to the .p4ignore file in the same
directory, for compatibility between the Perforce and Git mirrors of
the repository, this broke "git status" for us and all our users.
See https://github.com/git/git/blob/master/Documentation/RelNotes/2.32.0.txt
This change swaps the files so that .p4ignore is a symbolic link to
.gitignore in each case.
This is a patch for the problem outlined in issue https://github.com/Ravenbrook/mps/issues/61 - that the value in
GetLastError() is not automatically saved and restored when a vectored exception
handler is called. This is solved the same way as errno was handled on POSIX
systems.
This patch does *not* save and restore errno on Windows, since it seems like the
MPS does not call any functions that modify errno on the critical path on
Windows (generally only functions from POSIX do that).
1. Avoid looping over two expressions in parallel when one makes more
sense (compilers can do strength reduction optimization: we don't
need to do it ourselves).
2. Introduce macro ITER_PARALLEL for iterating over two expressions in
parallel, to clarify the intention and explain the need for the
cast to void in the implementation.
3. Add macros SAC_LARGE_ITER and SAC_SMALL_ITER to reduce the amount
of code duplication in sac.c.
The -Wcomma option appears to be turned on automatically by Xcode
12.3, so it's a good idea for the MPS to build with the option, to
avoid unpleasant surprises when people update their Xcode.
The simplest way to suppress the warning is to cast the left hand side
of the comma operator to void.
