Vm-dev November 2010

vm-dev@lists.squeakfoundation.org

32 participants
42 discussions

Tracing special messages [WAS] Re: [Vm-dev] Re: normalSend, specialObjectsArray and VM
by Mariano Martinez Peck 07 Nov '10

07 Nov '10

Hi. So....if I want to intercept ALL message sends....going to #normalSend is not enough since I have #class, #==, Float>>#+ etc that are executed directly like bytecodes. So...my questions are now: 1) Those special selectors are those that are in "Smalltalk specialSelectors" ? are there more? all from there are special? 2) All those "Smalltalk specialSelectors" have their associated bytecode primitive in Interpreter?? If true, then I should modify all bytecodePrim* in Interpreter. I am right? If I do that, that's all ? I am intercepting everything? Thanks a lot in advance, Mariano On Sun, Oct 3, 2010 at 11:09 PM, Craig Latta <craig(a)netjam.org> wrote: > > > > Craig Latta has done all this work, talk to him. > > Sure, I'd be happy to discuss it. > > > -C > > -- > Craig Latta > www.netjam.org > + 31 020 894 6247 > + 1 415 287 3547 > > > >

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RoarVM: The Manycore SqueakVM
by Stefan Marr 07 Nov '10

07 Nov '10

Dear Smalltalk community: We are happy to announce, now officially, RoarVM: the first single-image manycore virtual machine for Smalltalk. The RoarVM supports the parallel execution of Smalltalk programs on x86 compatible multicore systems and Tilera TILE64-based manycore systems. It is tested with standard Squeak 4.1 closure-enabled images, and with a stripped down version of a MVC-based Squeak 3.7 image. Support for Pharo 1.2 is currently limited to 1 core, but we are working on it. A small teaser: 1 core 66286897 bytecodes/sec; 2910474 sends/sec 8 cores 470588235 bytecodes/sec; 19825677 sends/sec RoarVM is based on the work of David Ungar and Sam S. Adams at IBM Research. The port to x86 multicore systems was done by me. They open-sourced their VM, formerly know as Renaissance VM (RVM), under the Eclipse Public License [1]. Official announcement of the IBM source code release: http://soft.vub.ac.be/~smarr/rvm-open-source-release/ The source code of the RoarVM has been released as open source to enable the Smalltalk community to evaluate the ideas and possibly integrate them into existing systems. So, the RoarVM is meant to experiment with Smalltalk systems on multi- and manycore machines. The open source project, and downloads can also be found on GitHub: http://github.com/smarr/RoarVM http://github.com/smarr/RoarVM/downloads For more detailed information, please refer to the README file[3]. Instructions to compile the RoarVM on Linux and OS X can be found at [4]. Windows is currently not supported, however, there are good chances that it will work with cygwin or pthreads for win32, but that has not be verified in anyway. If you feel brave, please give it a shot and report back. If the community does not object, we would like to occupy the vm-dev(a)lists.squeakfoundation.org mailinglist for related discussions. So, if you run into any trouble while experimenting with the RoarVM, do not hesitate to report any problems and ask any questions. You can also follow us on Twitter @roarvm [5]. Best regards Stefan Marr [1] http://www.eclipse.org/legal/epl-v10.html [2] http://soft.vub.ac.be/~smarr/rvm-open-source-release/ [3] http://github.com/smarr/RoarVM/blob/master/README.rst [4] http://github.com/smarr/RoarVM/blob/master/INSTALL.rst [5] http://twitter.com/roarvm -- Stefan Marr Software Languages Lab Vrije Universiteit Brussel Pleinlaan 2 / B-1050 Brussels / Belgium http://soft.vub.ac.be/~smarr Phone: +32 2 629 2974 Fax: +32 2 629 3525

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Getting stable Cog build on Ubuntu linux
by Igor Stasenko 07 Nov '10

07 Nov '10

Hello, few weeks ago i reported that i experienced Cog VM crashes soon after starting it. I though that it could be related to pthread library, listed twice in GCC options.. I was managed to build a stable VM but now i found that problem is not in that! The VM, which i was built were using debugging-enabled, with all bells&whistles config.. But once i tried a 'release' config, the VM is crashing: ../../platforms/unix/config/configure --without-vm-display-fbdev --without-npsqueak -prefix=/home/sig/cogvm/ CFLAGS="-g -O2 -msse2 -D_GNU_SOURCE -DNDEBUG -DITIMER_HEARTBEAT=1 -DNO_VM_PROFILE=1 -DCOGMTVM=0 -DDEBUGVM=0" Then i tried to gradually change various options and foudn that this one produces stable VM: ../../platforms/unix/config/configure --without-vm-display-fbdev --without-npsqueak -prefix=/home/sig/cogvm/ CFLAGS="-g -O1 -msse2 -D_GNU_SOURCE -DNDEBUG -DITIMER_HEARTBEAT=1 -DNO_VM_PROFILE=1 -DCOGMTVM=0 -DDEBUGVM=0" (the difference is just an optimization option O2 vs O1 ) It seems like a compiler related issue.. Any ideas what wrong with O2? gcc --version gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3 Copyright (C) 2009 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -- Best regards, Igor Stasenko AKA sig.

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VM Maker: VMMaker-dtl.201.mcz
by squeak-dev-noreply＠lists.squeakfoundation.org 06 Nov '10

06 Nov '10

Dave Lewis uploaded a new version of VMMaker to project VM Maker: http://www.squeaksource.com/VMMaker/VMMaker-dtl.201.mcz ==================== Summary ==================== Name: VMMaker-dtl.201 Author: dtl Time: 6 November 2010, 4:53:38 am UUID: d2f0c4bc-05d5-447b-ad23-ffde0511f64c Ancestors: VMMaker-dtl.200 VMMaker 4.3.15 Update reference to deprecated #findLastOccurranceOfString:startingAt: method in #replaceLastOccurence:with: to address problems loading in Pharo. Fix TMethod>>emitCCodeOn:generator: to set currentMethod during code generation. The Cog code generator is only partially incorporated at this point; this works around a missing update needed for SlangBrowser.

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What's the magic breakpoint for *** attempt to pop an unknown autorelease pool?
by Eliot Miranda 05 Nov '10

05 Nov '10

Hi All, on Mac OS X Snow Leopard anyone know the magic breakpoint to find out when the program emits "*** attempt to pop an unknown autorelease pool". I've put breakpoints in __NSAutoreleaseNoPool, write, write$NOCANCEL$UNIX2003 (sp?) vrious ctime & ctime_r routines and still I can't get gdb to break on producing the error. Any hints? TIA best Eliot

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[commit] r2330 - Merge http://lists.squeakfoundation.org/pipermail/vm-dev/2010-April/004187.html
by commits＠squeakvm.org 03 Nov '10

03 Nov '10

Author: eliot Date: 2010-11-03 10:10:35 -0700 (Wed, 03 Nov 2010) New Revision: 2330 Modified: branches/Cog/platforms/Cross/plugins/BochsIA32Plugin/sqBochsIA32Plugin.cpp branches/Cog/platforms/win32/plugins/FilePlugin/sqWin32FilePrims.c branches/Cog/processors/IA32/bochs/cpu/cpu.cc branches/Cog/unixbuild/HowToBuild Log: Merge http://lists.squeakfoundation.org/pipermail/vm-dev/2010-April/004187.html fix (EOF testing on win32). Add execution protection to Bochs IA32 simulator plugin. Update unix build info for ubuntu. Modified: branches/Cog/platforms/Cross/plugins/BochsIA32Plugin/sqBochsIA32Plugin.cpp =================================================================== --- branches/Cog/platforms/Cross/plugins/BochsIA32Plugin/sqBochsIA32Plugin.cpp 2010-10-13 18:39:14 UTC (rev 2329) +++ branches/Cog/platforms/Cross/plugins/BochsIA32Plugin/sqBochsIA32Plugin.cpp 2010-11-03 17:10:35 UTC (rev 2330) @@ -92,8 +92,8 @@ int singleStepCPUInSizeMinAddressReadWrite(void *cpu, - void *memory, ulong byteSize, - ulong minReadAddr, ulong minWriteAddr) + void *memory, ulong byteSize, + ulong minAddr, ulong minWriteMaxExecAddr) { BX_CPU_C *anx86 = (BX_CPU_C *)cpu; @@ -101,33 +101,36 @@ return BadCPUInstance; theMemory = (unsigned char *)memory; theMemorySize = byteSize; - minReadAddress = minReadAddr; - minWriteAddress = minWriteAddr; - if (anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx >= theMemorySize) - return MemoryBoundsError; + minReadAddress = minAddr; + minWriteAddress = minWriteMaxExecAddr; +#if 0 + if (anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx >= minWriteMaxExecAddr) + return anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx >= byteSize + ? MemoryBoundsError + : ExecutionError; +#endif if ((theErrorAcorn = setjmp(anx86->jmp_buf_env)) != 0) { anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx = anx86->prev_rip; return theErrorAcorn; } blidx = 0; - bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled = + bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled = minWriteMaxExecAddr - 1; bx_cpu.sregs[BX_SEG_REG_DS].cache.u.segment.limit_scaled = bx_cpu.sregs[BX_SEG_REG_SS].cache.u.segment.limit_scaled = byteSize; - bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit = + bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit = minWriteMaxExecAddr >> 16; bx_cpu.sregs[BX_SEG_REG_DS].cache.u.segment.limit = bx_cpu.sregs[BX_SEG_REG_SS].cache.u.segment.limit = byteSize >> 16; anx86->eipFetchPtr = theMemory; - anx86->eipPageWindowSize = theMemorySize; + anx86->eipPageWindowSize = minWriteMaxExecAddr; anx86->cpu_single_step(); return blidx == 0 ? 0 : SomethingLoggedError; } int - runCPUInSizeMinAddressReadWrite(void *cpu, - void *memory, ulong byteSize, - ulong minReadAddr, ulong minWriteAddr) + runCPUInSizeMinAddressReadWrite(void *cpu, void *memory, ulong byteSize, + ulong minAddr, ulong minWriteMaxExecAddr) { BX_CPU_C *anx86 = (BX_CPU_C *)cpu; @@ -135,24 +138,28 @@ return BadCPUInstance; theMemory = (unsigned char *)memory; theMemorySize = byteSize; - minReadAddress = minReadAddr; - minWriteAddress = minWriteAddr; - if (anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx >= theMemorySize) - return MemoryBoundsError; + minReadAddress = minAddr; + minWriteAddress = minWriteMaxExecAddr; +#if 0 + if (anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx >= minWriteMaxExecAddr) + return anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx >= byteSize + ? MemoryBoundsError + : ExecutionError; +#endif if ((theErrorAcorn = setjmp(anx86->jmp_buf_env)) != 0) { anx86->gen_reg[BX_32BIT_REG_EIP].dword.erx = anx86->prev_rip; return theErrorAcorn; } blidx = 0; - bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled = + bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit_scaled = minWriteMaxExecAddr - 1; bx_cpu.sregs[BX_SEG_REG_DS].cache.u.segment.limit_scaled = bx_cpu.sregs[BX_SEG_REG_SS].cache.u.segment.limit_scaled = byteSize; - bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit = + bx_cpu.sregs[BX_SEG_REG_CS].cache.u.segment.limit = minWriteMaxExecAddr >> 16; bx_cpu.sregs[BX_SEG_REG_DS].cache.u.segment.limit = bx_cpu.sregs[BX_SEG_REG_SS].cache.u.segment.limit = byteSize >> 16; anx86->eipFetchPtr = theMemory; - anx86->eipPageWindowSize = theMemorySize; + anx86->eipPageWindowSize = minWriteMaxExecAddr; bx_pc_system.kill_bochs_request = 0; anx86->cpu_loop(0 /* = "run forever" until exception or interupt */); if (anx86->stop_reason != STOP_NO_REASON) { @@ -415,12 +422,7 @@ last_read_address = (bx_address)-1; } -// Cut-down parts of cpu/cpu.cc -void BX_CPU_C::prefetch(void) -{ -} - // Cut-down parts of memory/misc_mem.cc for cpu/debugstuff.cc bx_bool BX_MEM_C::dbg_fetch_mem(BX_CPU_C *cpu, bx_phy_address addr, unsigned len, Bit8u *buf) { Modified: branches/Cog/platforms/win32/plugins/FilePlugin/sqWin32FilePrims.c =================================================================== --- branches/Cog/platforms/win32/plugins/FilePlugin/sqWin32FilePrims.c 2010-10-13 18:39:14 UTC (rev 2329) +++ branches/Cog/platforms/win32/plugins/FilePlugin/sqWin32FilePrims.c 2010-11-03 17:10:35 UTC (rev 2330) @@ -83,7 +83,7 @@ if (!sqFileValid(f)) FAIL(); ofs.offset = 0; ofs.dwLow = SetFilePointer(FILE_HANDLE(f), 0, &ofs.dwHigh, FILE_CURRENT); - return ofs.offset == sqFileSize(f); + return ofs.offset >= sqFileSize(f); } sqInt sqFileClose(SQFile *f) { Modified: branches/Cog/processors/IA32/bochs/cpu/cpu.cc =================================================================== --- branches/Cog/processors/IA32/bochs/cpu/cpu.cc 2010-10-13 18:39:14 UTC (rev 2329) +++ branches/Cog/processors/IA32/bochs/cpu/cpu.cc 2010-11-03 17:10:35 UTC (rev 2330) @@ -677,7 +677,6 @@ // * ROM boundary: 2k (dont care since we are only reading) // * segment boundary: any -#if !COG void BX_CPU_C::prefetch(void) { bx_address laddr = BX_CPU_THIS_PTR get_laddr(BX_SEG_REG_CS, RIP); @@ -708,6 +707,7 @@ } } +#if !COG bx_address lpf = LPFOf(laddr); unsigned TLB_index = BX_TLB_INDEX_OF(lpf, 0); bx_TLB_entry *tlbEntry = &BX_CPU_THIS_PTR TLB.entry[TLB_index]; @@ -715,9 +715,9 @@ if ((tlbEntry->lpf == lpf) && !(tlbEntry->accessBits & USER_PL)) { pAddr = A20ADDR(tlbEntry->ppf | pageOffset); -#if BX_SupportGuest2HostTLB +# if BX_SupportGuest2HostTLB fetchPtr = (Bit8u*) (tlbEntry->hostPageAddr); -#endif +# endif } else { if (BX_CPU_THIS_PTR cr0.get_PG()) { @@ -749,15 +749,15 @@ } } -#if BX_SUPPORT_ICACHE +# if BX_SUPPORT_ICACHE BX_CPU_THIS_PTR currPageWriteStampPtr = pageWriteStampTable.getPageWriteStampPtr(pAddr); Bit32u pageWriteStamp = *(BX_CPU_THIS_PTR currPageWriteStampPtr); pageWriteStamp &= ~ICacheWriteStampFetchModeMask; // Clear out old fetch mode bits pageWriteStamp |= BX_CPU_THIS_PTR fetchModeMask; // And add new ones pageWriteStampTable.setPageWriteStamp(pAddr, pageWriteStamp); -#endif +# endif +#endif /* !COG */ } -#endif void BX_CPU_C::boundaryFetch(const Bit8u *fetchPtr, unsigned remainingInPage, bxInstruction_c *i) { Modified: branches/Cog/unixbuild/HowToBuild =================================================================== --- branches/Cog/unixbuild/HowToBuild 2010-10-13 18:39:14 UTC (rev 2329) +++ branches/Cog/unixbuild/HowToBuild 2010-11-03 17:10:35 UTC (rev 2330) @@ -9,6 +9,10 @@ 3. Open a shell, cd into the unixbuild/bld directory and execute ../../platforms/unix/config/configure CFLAGS="-g -O2 -msse2 -D_GNU_SOURCE -DNDEBUG -DITIMER_HEARTBEAT=1 -DNO_VM_PROFILE=1 -DCOGMTVM=0 -DDEBUGVM=0" LIBS=-lpthread make install prefix=WhereYouWantTheVmToGo + + N.B. On Ubuntu *do not* supply "LIBS=-lpthread", i.e. use + ../../platforms/unix/config/configure CFLAGS="-g -O2 -msse2 -D_GNU_SOURCE -DNDEBUG -DITIMER_HEARTBEAT=1 -DNO_VM_PROFILE=1 -DCOGMTVM=0 -DDEBUGVM=0" + 4. At the end of it you'll get a new VM in the path provided via -prefix

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RoarVM - Pharo and Squeak on Multicore
by Torsten Bergmann 03 Nov '10

03 Nov '10

Read more: http://astares.blogspot.com/2010/11/roarvm-pharo-and-squeak-on-multicore.ht… -- Neu: GMX De-Mail - Einfach wie E-Mail, sicher wie ein Brief! Jetzt De-Mail-Adresse reservieren: http://portal.gmx.net/de/go/demail

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RoarVM
by Igor Stasenko 03 Nov '10

03 Nov '10

Hello, just seen on my Buzz :) http://github.com/smarr/RoarVM ---- RoarVM, formerly known as the Renaissance Virtual Machine (RVM) is developed as part of a IBM Research project to investigate programming paradigms and languages for manycore systems of the future. Specifically, this VM is meant to support manycore systems with more than 1000 cores in the future. The RVM was open sourced by IBM Research under the Eclipse Public License. Please see the open source announcement for further information Today, the RoarVM supports the parallel execution of Smalltalk programs on x86 compatible multicore systems and Tilera TILE64-based manycore systems. It is tested with standard Squeak 4.1 closure-enabled images, and with a stripped down version of a MVC-based Squeak 3.9 image. The RoarVM provides parallel execution of Smalltalk processes and thus, the programming model is a typical shared-memory model similar to Java with its threads and classical Pthreads for C/C++. ----- Good to know, that Dave & Co released their work. -- Best regards, Igor Stasenko AKA sig.

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VM Maker: VMMaker-dtl.200.mcz
by squeak-dev-noreply＠lists.squeakfoundation.org 03 Nov '10

03 Nov '10

Dave Lewis uploaded a new version of VMMaker to project VM Maker: http://www.squeaksource.com/VMMaker/VMMaker-dtl.200.mcz ==================== Summary ==================== Name: VMMaker-dtl.200 Author: dtl Time: 2 November 2010, 6:58:07 am UUID: 5c561064-656f-4b3a-903f-65e3ea147c50 Ancestors: VMMaker-dtl.199 VMMaker 4.3.14 Permit allocation of very large individual objects, e.g. "String new: 1024 * 1024 * 1024 * 4" for 64 bit object memory on 64 bit host. Resulting object may not display properly in an inspector, but is otherwise valid and can be successfully garbage collected. Fix JPEGReadWriter2PluginTest>>formBytes for compatibility with Squeak 3.8.

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Special Objects Array question
by Gabriel Hernán Barbuto 02 Nov '10

02 Nov '10

Hi I am looking at MicroSqueak and trying to make it work in a new image. I run MicroSqueak in a new VM and it works. What is a bit odd is that MicroSqueak has a different class hierarchy for String. It doesn't know about ByteString nor WideString and the String class in MicroSqueak has a different format than the one in recent images. How is it possible that a MicroSqueak generated image runs on the recent VMs? The special objects array that MicroSqueak creates is different. For example, at index 7 MicroSqueak put its own version of String instead of ByteString. I have tried it on Mac OS X on the Squeak 4.2.5b1 VM and on Windows on the 4.0.2 VM. My guess is that it works because MicroSqueak String has the same structure as ByteString in current images. So the VM does not notice that it is working with a different object. Thanks Gabriel

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Vm-dev November 2010