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1067 Commits

Author SHA1 Message Date
Brian Anderson
6443a7b513 rt: Do fewer stack canary checks 2011-12-20 13:54:47 -08:00
Brian Anderson
93fef2e113 rt: Parenthesize the red zone macros 2011-12-20 11:57:22 -08:00
Brian Anderson
784713ec68 rt: Add a canary value to the end of every stack 
Check it on upcall entry and exit, and on stack deletion
 2011-12-20 11:48:47 -08:00
Brian Anderson
56ec9cb278 rt: Run yet more task_start_wrapper cleanup on the C stack 2011-12-20 10:29:40 -08:00
Brian Anderson
25f7c844df rt: Don't reuse stack segments when they are not big enough 2011-12-19 22:47:28 -08:00
Brian Anderson
05bf105c90 rt: Rename asm_call_on_stack to __morestack 
Newer gdb's will backtrace through functions named __morestack even
if they change the stack.
 2011-12-19 22:05:40 -08:00
Brian Anderson
edf6e1ec0e rt: Zero the bottom frame's return address and base pointer 
My reading of libunwind leads me to believe this is expected.

Closes #1322
 2011-12-19 18:47:39 -08:00
Brian Anderson
1bfc4e2e6c rt: Save and restore %rax/%eax in __morestack 
This doesn't matter now since we use an out pointer for return
values but it's sure to show up mysteriously someday.
 2011-12-19 18:16:21 -08:00
Brian Anderson
c3569abb8c rt: Remove some unused stack from i386/morestack.S 2011-12-19 18:16:19 -08:00
Brian Anderson
d2e7336a01 rt: Remove unused saves from __morestack 2011-12-19 16:24:10 -08:00
Brian Anderson
50dc80f617 rt: Give upcall_new_stack the same convention as other upcalls 2011-12-19 16:24:10 -08:00
Brian Anderson
bedcaad97e rt: Give upcall_del_stack the same convention as other upcalls 2011-12-19 16:24:10 -08:00
Brian Anderson
bd6b80c972 rt: Get rid of the rethrow in upcall_fail 
Throwing in upcall_fail ends up running lots of code in the red zone. To avoid
it we have the personality function figure out which stack it's on and switch
as needed.
 2011-12-18 17:17:31 -08:00
Brian Anderson
c73eb8ff51 rt: Create different stack-switching paths for upcalls and shims 
Shims need to play with the stack limit, upcalls don't. Only one upcall,
upcall_fail is allowed to catch, and we need a find a way to get rid of that
catch as well because it results in _Unwind_Resume running off the end of the
Rust stack.
 2011-12-18 16:17:55 -08:00
Brian Anderson
f57fd8de1f rt: Run the cycle collector on the C stack 2011-12-18 15:23:44 -08:00
Brian Anderson
74d5faa86e rt: Give each platform its own red zone definition 2011-12-18 15:23:41 -08:00
Brian Anderson
762d7e43a6 rt: Trim the red zone to 20k on all platforms 2011-12-18 15:22:56 -08:00
Brian Anderson
3fa930f598 rt: Remove a bogus FIXME from ~rust_task 2011-12-18 02:09:41 -08:00
Brian Anderson
1a1fdf34b1 rt: Add lots of documentation to __morestack 2011-12-18 02:02:35 -08:00
Brian Anderson
7359fa422b Revert "rt: Turn on big stacks again. Unwinding still doesn't always succeed on mac" 
This reverts commit 68f4849f0f52bc37fc24a36fb7e14002bdb2cd61.
 2011-12-18 00:42:46 -08:00
Brian Anderson
68f4849f0f rt: Turn on big stacks again. Unwinding still doesn't always succeed on mac 2011-12-17 17:54:43 -08:00
Brian Anderson
fe683dfb80 rt: Get rid of the valgrind guard bytes at the end of the stack 
Preventing us from writing beyond our allocations is _what valgrind does_,
so telling valgrind not to let us write to the end of the stack isn't
buying anything.
 2011-12-17 16:46:50 -08:00
Brian Anderson
471b4d6e58 rt: Use a DWARF CFI scheme that works on mac in __morestack 2011-12-17 14:10:44 -08:00
Brian Anderson
7da8ab8fab rt: Turn on stack alignment checks for mac 2011-12-17 14:10:40 -08:00
Brian Anderson
4ac345939c rt: Cache an extra stack segment to avoid bad behavior at stack boundaries 2011-12-17 13:45:38 -08:00
Brian Anderson
0ed5117a9d rt: Set the default stack size to 768 bytes. Double on each alloc 2011-12-17 13:45:38 -08:00
Brian Anderson
b5b2ac0ec4 rt: Make 32-bit morestack compatible with fastcc 2011-12-16 18:18:43 -08:00
Brian Anderson
7d51961b6f rt: Fix saved address of unwinding %rsp in __morestack 
I haven't thought too deeply about this, but I think I was telling the
unwinder to use the stack pointer for the wrong frame when unwinding. Not sure
how that could have worked at all, but this results in the correct alignment
for cleanups.
 2011-12-16 18:18:43 -08:00
Brian Anderson
9d70c1949e rt: Fix alignment of the call to upcall_del_stack in __morestack 2011-12-16 18:18:43 -08:00
Brian Anderson
23df4de86d rt: Fix alignment of new stack segments 2011-12-16 18:18:43 -08:00
Brian Anderson
ab4f35c1f1 rt: Only call check_stack_alignment on linux 2011-12-16 18:18:43 -08:00
Brian Anderson
121c420184 rt: Insert stack alignment checks into upcalls 2011-12-16 18:18:43 -08:00
Elly Jones
89e880d613 std: file_is_dir -> path_is_dir, add path_exists 2011-12-16 17:37:21 -05:00
Niko Matsakis
88818334b7 update to not look at descs[], which is not necessarily valid 
if the input is a statically allocated type_desc
 2011-12-16 08:06:45 -08:00
Niko Matsakis
1e3259e119 massive refactor of how closures work 2011-12-15 13:44:06 -08:00
Niko Matsakis
35fe86dab7 export upcall_clone_type_desc 2011-12-14 14:32:25 -08:00
Niko Matsakis
f512e67fb9 clone type desc into exchange heap 2011-12-14 14:32:24 -08:00
Niko Matsakis
6a8cb704d9 get basic code generation working, clone type descs for lambda[send] 2011-12-14 14:32:20 -08:00
Brian Anderson
f0254e1e0d rt: Add a FIXME to 32-bit __morestack about trashing %eax 2011-12-13 19:13:17 -08:00
Brian Anderson
f332643e7f rt: Use %ecx instead of %eax during the second half of __morestack 
If Rust code made use of return values then using %eax here would clobber it
 2011-12-13 18:26:56 -08:00
Brian Anderson
32087f5c2a rt: Don't clobber fastcc argument registers in __morestack 2011-12-13 15:54:14 -08:00
Niko Matsakis
a98dec035f fix track alloc code 2011-12-12 18:25:17 -08:00
Brian Anderson
1c1bc2f1cd rt: Remove some duplicated code from 64-bit __morestack 2011-12-12 16:58:21 -08:00
Brian Anderson
887d970fee rt: Make unwinding through __morestack work on mac 
Had to bump the min stack size in some of the tests from 256 bytes
to 1024 bytes. Not sure why yet.
 2011-12-12 16:15:29 -08:00
Brian Anderson
3e32f6623c rt: Write CFI instructions that (might) work on mac in __morestack 
The DW_CFA_val_offset_sf instruction doesn't seem to work on mac,
even after implementing it in the llvm-mc assembler, so now
I'm looking for a different way to communicate the stack pointer
adjustment to the unwinder.
 2011-12-12 16:14:17 -08:00
Brian Anderson
7a8e73662d rt: Make unwinding through __morestack work on mac 
Had to bump the min stack size in some of the tests from 256 bytes
to 1024 bytes. Not sure why yet.
 2011-12-11 18:49:04 -08:00
Brian Anderson
7bc34f63d8 rt: Write CFI instructions that (might) work on mac in __morestack 
The DW_CFA_val_offset_sf instruction doesn't seem to work on mac,
even after implementing it in the llvm-mc assembler, so now
I'm looking for a different way to communicate the stack pointer
adjustment to the unwinder.
 2011-12-11 16:32:36 -08:00
Brian Anderson
b73caec3ce rt: Call upcall_fail on the C stack 2011-12-11 14:35:18 -08:00
Brian Anderson
5cd08586f6 rt: Add DWARF CFI info to asm_call_on_stack 
This will allow the unwinder to unwind this function so we can call
upcall_fail on the C stack.
 2011-12-11 14:35:09 -08:00
Brian Anderson
4699b6865f build: Use llvm-mc as our assembler 
LLVM's assembler understands .cfi pseudo-ops on the mac, which we need in
order to generate frames that can be DWARF-unwound
 2011-12-10 18:51:21 -08:00