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(That's a stronger guarantee than the usual one of\r\nnot moving an expression into tail position if there's potentially a\r\nway to detect the movement through continuation marks.) An earlier\r\ncommit 6a73b9edc7 strengthened movement of error calls in a way that\r\ndid not preserve this `(debug-level 2)` constraint, so this commit\r\nprimarily adjusts those changes. Also, the earlier commit 19af32e2d\r\nallowed the compiler to move an error call out of tail position, and\r\nthat transformation is now suppressed when `debug-level` is 2 or more.\r\n\r\nThese changes are meant to help with debugging, but they're not enough\r\nto implement the previously specified behavior of `debug-level`. It\r\nturns out that Chez Scheme v9.x didn't implement the specified\r\nbehavior, either, because it would convert `(let ([x (error ...)]) x)`\r\nto just `(error ...)`, for example. The old specification seems too\r\nstrong, and so part of the revision here is to change the specificaton\r\nto be encouraging a particular interaction of errors and\r\ncontinuaton-inspection results, but not guaranteeing it. Meanwhile,\r\nwhen well-defined reflection on continuations is needed, continuation\r\nmarks provide that functionality.","shortMessageHtmlLink":"restore <code>(debug-level 2)</code> behavior, but reduce its guarantees (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2308898776\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/834\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/834/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/834\">#834</a>)"}},{"before":"ad064de67269f6dd06e1bd8a7ac4324ee2a6324f","after":"66c40f11423cf0718a0676b3cb09a0abd4990ec1","ref":"refs/heads/main","pushedAt":"2024-04-30T16:23:33.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"repair `pseudo-random-generator-next!` for large integers (#831)\n\nFor an argument exact integer greater than 4294967087, generation of a\r\nrandom integer by piecing together smaller random numbers was broken.\r\nIt didn't cover the whole range uniformly, and by mistreating the\r\nlargest part of the integer, it could always produce 0 (e.g., for\r\n`(expt 2 32)`).\r\n\r\nCloses #830","shortMessageHtmlLink":"repair <code>pseudo-random-generator-next!</code> for large integers (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2269214090\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/831\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/831/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/831\">#831</a>)"}},{"before":"08a45e564b33bf75df626479427d5fefbd8c921a","after":"ad064de67269f6dd06e1bd8a7ac4324ee2a6324f","ref":"refs/heads/main","pushedAt":"2024-04-26T14:28:09.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"configure: improve inference of compiler flags for pb builds (#829)\n\nWhen building an pb variant like `tpb64l`, and even when building for\r\na platform without native-code support, the \"configure\" script may\r\nstill be able to infer suitable C compilation and linking flags for\r\nthe kernel. Add an `--os=...` flag that can be used to override that\r\ninference in case it's not correct (as in the case of cross\r\ncompilation).","shortMessageHtmlLink":"configure: improve inference of compiler flags for pb builds (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2259679734\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/829\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/829/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/829\">#829</a>)"}},{"before":"c7a35602eb8a2115010a829fb7750d9fb2c8de5c","after":"08a45e564b33bf75df626479427d5fefbd8c921a","ref":"refs/heads/main","pushedAt":"2024-04-13T00:48:00.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"clean up memory fence and compare-and-swap kernel functions (#826)\n\nCAS variants with different fence properties in \"atomic.h\" ware a\r\nleftover from an early experiment in parallel garbage collection, and\r\nthat experiment did not turn out to be a good idea. The CAS variants\r\nwere left half-implemented, and they're not needed, so this commit\r\nsimplifies to reflect the needed functionality. Also, the commit adds\r\ncomments to clarify that CAS support is used only for pb mode and to\r\nexplain trade-offs for inline assembly and compiler intrinsics.\r\n\r\nSmall repairs to the build scripts enable pbarch builds on Windows,\r\nfor what it's worth. Otherwise, this is just an internal clean-up and\r\ndoes not add anything new or fix any bugs.","shortMessageHtmlLink":"clean up memory fence and compare-and-swap kernel functions (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2232023748\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/826\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/826/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/826\">#826</a>)"}},{"before":"66dd7a813934f71ec988d5b0ecd98b4b9386abb4","after":"c7a35602eb8a2115010a829fb7750d9fb2c8de5c","ref":"refs/heads/main","pushedAt":"2024-04-08T20:13:49.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"add missing memory fences for tppc32le and pb variants (#825)\n\nFor tppc32le, memory-fence generation needed to be turned on in\r\ncpprim. For pb variants, use `__sync_synchronize()` as provided by GCC\r\nand Clang to support architectures other than ones explicitly covered\r\nin \"atomic.h\".","shortMessageHtmlLink":"add missing memory fences for tppc32le and pb variants (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2230013242\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/825\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/825/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/825\">#825</a>)"}},{"before":"9576b83dd757cf1494933c9fbc80cb6aff022295","after":"66dd7a813934f71ec988d5b0ecd98b4b9386abb4","ref":"refs/heads/main","pushedAt":"2024-04-07T14:12:46.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"repairs for pb32 foreign interface (#824)\n\nSupport via libffi for pb32 had not been well tested before. Just\r\nrunning existing tests turned up several problems in the handling of\r\ncallable addresses and 64-bit arguments and results.","shortMessageHtmlLink":"repairs for pb32 foreign interface (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2225897318\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/824\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/824/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/824\">#824</a>)"}},{"before":"dbce392733569b6d910b66286c95d2fb2d6c91ff","after":"9576b83dd757cf1494933c9fbc80cb6aff022295","ref":"refs/heads/main","pushedAt":"2024-03-27T16:01:05.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"repair GC for reference bytevector whose length isn't a multiple of a word (#823)\n\nA reference bytevector is intended to be used as a multiple of a word\r\nsize, but there's no explicit constraint, and so it should work with\r\nany length. When the length is not a multiple of the word size, then\r\nin a copying step, extra bytes at the end of the bytevector were\r\nmissed.","shortMessageHtmlLink":"repair GC for reference bytevector whose length isn't a multiple of a…"}},{"before":"3555ad03063bb5f246b46e6239dc64cb01a36ee4","after":"dbce392733569b6d910b66286c95d2fb2d6c91ff","ref":"refs/heads/main","pushedAt":"2024-03-26T20:42:45.000Z","pushType":"pr_merge","commitsCount":1,"pusher":{"login":"mflatt","name":"Matthew Flatt","path":"/mflatt","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/295034?s=80&v=4"},"commit":{"message":"reduce memory use of pbchunk conversion (#820)\n\nC code generated by the pbchunk conversion is especially verbose, with\r\nlong macro names for simple operations and lots of comments to reflect\r\nsource instructions. Generation of that code was formerly rendering to\r\ntext in memory, and then splitting into the output files, which turns\r\nout to use a lot of memory. Converting to text at the last minute can\r\nhave a much lower peak memory use.\r\n\r\nIf memory is at a premimum, then rendering to a temporary file would\r\nwork even better, but this change already brings memory use in line\r\nwith other build actions without having to deal with a temporary file.\r\nMemory use could also be reduced by dropping comments that connect to\r\nsource instructions; again, though, doesn't seem necessary for now.","shortMessageHtmlLink":"reduce memory use of pbchunk conversion (<a class=\"issue-link js-issue-link\" data-error-text=\"Failed to load title\" data-id=\"2204578012\" data-permission-text=\"Title is private\" data-url=\"https://github.com/cisco/ChezScheme/issues/820\" data-hovercard-type=\"pull_request\" data-hovercard-url=\"/cisco/ChezScheme/pull/820/hovercard\" href=\"https://github.com/cisco/ChezScheme/pull/820\">#820</a>)"}}],"hasNextPage":true,"hasPreviousPage":false,"activityType":"all","actor":null,"timePeriod":"all","sort":"DESC","perPage":30,"cursor":"djE6ks8AAAAEsPb7GAA","startCursor":null,"endCursor":null}},"title":"Activity · cisco/ChezScheme"}