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Also ends up fixing one case in libstd.
Closes #3395
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Just to get the ball rolling, this patch sets stacks to 4 MB on >32-bit architectures.
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cc #6004 and #3273
This is a rewrite of TLS to get towards not requiring `@` when using task local storage. Most of the rewrite is straightforward, although there are two caveats:
1. Changing `local_set` to not require `@` is blocked on #7673
2. The code in `local_pop` is some of the most unsafe code I've written. A second set of eyes should definitely scrutinize it...
The public-facing interface currently hasn't changed, although it will have to change because `local_data::get` cannot return `Option<T>`, nor can it return `Option<&T>` (the lifetime isn't known). This will have to be changed to be given a closure which yield `&T` (or as an Option). I didn't do this part of the api rewrite in this pull request as I figured that it could wait until when `@` is fully removed.
This also doesn't deal with the issue of using something other than functions as keys, but I'm looking into using static slices (as mentioned in the issues).
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Also ends up fixing one case in libstd
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r? @graydon, @nikomatsakis, @pcwalton, or @catamorphism
Sorry this is so huge, but it's been accumulating for about a month. There's lots of stuff here, mostly oriented toward enabling multithreaded scheduling and improving compatibility between the old and new runtimes. Adds task pinning so that we can create the 'platform thread' in servo.
[Here](https://github.com/brson/rust/blob/e1555f9b5628af2b6c6ed344cad621399cb7684d/src/libstd/rt/mod.rs#L201) is the current runtime setup code.
About half of this has already been reviewed.
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Conflicts:
src/libextra/test.rs
src/libstd/rt/global_heap.rs
src/libstd/unstable/lang.rs
src/libstd/vec.rs
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Conflicts:
src/libstd/rt/test.rs
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Conflicts:
src/libstd/rt/uvio.rs
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ref-count
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Conflicts:
src/libextra/test.rs
src/libstd/at_vec.rs
src/libstd/cleanup.rs
src/libstd/rt/comm.rs
src/libstd/rt/global_heap.rs
src/libstd/task/spawn.rs
src/libstd/unstable/lang.rs
src/libstd/vec.rs
src/rt/rustrt.def.in
src/test/run-pass/extern-pub.rs
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Conflicts:
src/libstd/rt/test.rs
src/rt/rustrt.def.in
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* stop using an atomic counter, this has a significant cost and
valgrind will already catch these leaks
* remove the extra layer of function calls
* remove the assert of non-null in free, freeing null is well defined
but throwing a failure from free will not be
* stop initializing the `prev`/`next` pointers
* abort on out-of-memory, failing won't necessarily work
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add android dummy functions which does not exist in boinic.
after #7257, some mman related functions are needed for android.
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through yields
This avoids the following pathological scenario that makes threadring OOM:
1) task calls C using fast_ffi, borrowing a big stack from the scheduler.
2) task returns from C and places the big stack on the task-local stack segment list
3) task calls further Rust functions that require growing the stack, and for this reuses the big stack
4) task yields, failing to return the big stack to the scheduler.
5) repeat 500+ times and OOM
Conflicts:
src/rt/rust_task.cpp
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Conflicts:
src/rt/rustrt.def.in
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This sets the `get_tydesc()` return type correctly and removes the intrinsic module. See #3730, #3475.
Update: this now also removes the unused shape fields in tydescs.
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To remove the environment pointer, support for function pointers without
an environment argument is needed (i.e. a fixed version of #6661).
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Towards #4812. Also includes some minor cleanups.
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while cross-compiling, ar in cross toolchains are required.
linux is not sensitive so could not see errors.
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Conflicts:
src/rt/rust_builtin.cpp
src/rt/rustrt.def.in
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New snapshot means this can all go. Also removes places that have
comments that say they are workarounds for stage0 errors.
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Under valgrind on 64->32 cross compiles the dynamic linker is emitting
some error messages on stderr, which interferes with the tests that
are checking stderr.
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Conflicts:
src/libstd/rt/uvio.rs
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Conflicts:
src/libstd/rt/comm.rs
src/libstd/rt/mod.rs
src/libstd/rt/sched.rs
src/libstd/rt/task.rs
src/libstd/rt/test.rs
src/libstd/rt/tube.rs
src/libstd/rt/uv/uvio.rs
src/libstd/rt/uvio.rs
src/libstd/task/spawn.rs
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