cmucl-ticket July 2012

cmucl-ticket@common-lisp.net

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3 discussions

[cmucl-ticket] [cmucl] #60: compile-file and export problem
by cmucl 22 Dec '12

22 Dec '12

#60: compile-file and export problem --------------------+------------------------------------------------------- Reporter: rtoy | Owner: somebody Type: defect | Status: new Priority: major | Milestone: Component: Core | Version: 2012-05 Keywords: | --------------------+------------------------------------------------------- Put the following in a file and {{{compile-file}}}. This shouldn't cause any problems but it does. {{{ (defpackage fail (:use cl)) (in-package fail) (defvar *x* '^) (export *x*) }}} -- Ticket URL: <http://trac.common-lisp.net/cmucl/ticket/60> cmucl <http://common-lisp.net/project/cmucl> Cmucl is a high-performance, free Common Lisp implementation.

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[cmucl-ticket] [cmucl] #56: Heap overflow checking fails on darwin/x86
by cmucl 03 Sep '12

03 Sep '12

#56: Heap overflow checking fails on darwin/x86 --------------------+------------------------------------------------------- Reporter: rtoy | Owner: somebody Type: defect | Status: new Priority: major | Milestone: Component: Core | Version: 2012-01 Keywords: | --------------------+------------------------------------------------------- {{{ cmulisp -dynamic-space-size 64 * (defvar *1* (make-list 10000000)) ; [GC threshold exceeded with 35,359,432 bytes in use. Commencing GC.] ; [GC completed with 21,504,336 bytes retained and 13,855,096 bytes freed.] ; [GC will next occur when at least 53,504,336 bytes are in use.] ; [GC threshold exceeded with 53,514,472 bytes in use. Commencing GC.] *A2 gc_alloc_new_region failed, nbytes=8. CMUCL has run out of dynamic heap space (64 MB). You can control heap size with the -dynamic-space-size commandline option. sigbus_handler: Real protection violation at 0xac3, PC = 0x4b3243e3 ... }}} This probably happens in older versions too, but I didn't check. Works ok on linux. -- Ticket URL: <http://trac.common-lisp.net/cmucl/ticket/56> cmucl <http://common-lisp.net/project/cmucl> Cmucl is a high-performance, free Common Lisp implementation.

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[cmucl-ticket] [cmucl] #61: Darwin+clang doesn't produce a working lisp
by cmucl 18 Jul '12

18 Jul '12

#61: Darwin+clang doesn't produce a working lisp --------------------+------------------------------------------------------- Reporter: rtoy | Owner: somebody Type: defect | Status: new Priority: major | Milestone: Component: Core | Version: 2012-07 Keywords: | --------------------+------------------------------------------------------- Compiling the C runtime on Darwin with clang does not produce a working lisp. The cause is that clang uses xmm registers in gencgc.c, but the allocator calls {{{alloc()}}} directly without saving any live xmm registers which eventually get trashed. For example the vop {{{ (define-vop (move-from-single) (:args (x :scs (single-reg) :to :save)) (:results (y :scs (descriptor-reg))) (:node-var node) (:note _N"float to pointer coercion") (:save-p t) (:generator 13 (with-fixed-allocation (y vm:single-float-type vm:single-float-size node) (inst movss (ea-for-sf-desc y) x)))) }}} will save any live float registers, but not the arg {{{x}}}. If the allocator calls {{{alloc()}}}, {{{x}}} could be destroyed. Possible solutions: 1. Save and restore float args to the stack in every float vop that does allocation. 1. Make {{{alloc()}}} save all the float registers. The first solution is nice because only the registers that need to be saved are saved. But it's not nice because every vop will save/restore when most of the time {{{alloc()}}} will not be called. The second solution is nice because it's always safe, even if some vop forgot to save a register. But it's not nice because all float registers are saved when only one (or a very small number) needs to be saved. But it looks like {{{alloc()}}} is relatively expensive so perhaps the cost of saving all registers is in the noise. (Should measure this.) -- Ticket URL: <http://trac.common-lisp.net/cmucl/ticket/61> cmucl <http://common-lisp.net/project/cmucl> Cmucl is a high-performance, free Common Lisp implementation.

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cmucl-ticket July 2012