Pike-devel February 2021

pike-devel@lists.lysator.liu.se

5 participants
11 discussions

Re: Playing music using pike and SDL.
by Martin Nilsson (lvl 60) ＠ Pike (-) developers forum 13 Mar '26

13 Mar '26

Were you not able to get any C code to play through SDL either? Does your SDL library have a mixer compiled in it (I think it is optional)?

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managing comport settings in linux
by Henrik Grubbstr�m (Lysator) ＠ Pike (-) developers forum 13 Mar '26

13 Mar '26

Not a good idea; the design philosophy of Pike is that Pike-level code should never be able to cause memory corruption at C-level. With ioctls there's no way to know what data a specific ioctl wants without reading the documentation for that specific ioctl for that specific OS. ioctls and fcntls are a way for device handlers to hook in APIs that aren't standard across all filedescriptors. / Henrik Grubbström (Lysator) Previous text: >2004-08-17 13:32: >Subject: managing comport settings in linux >-------------------------------------------------------------------- >What would be nice, is a way to define ioctl methods in >Pike. Perhaps something like > >object i = Stdio.IOCTL(4242 /* request_id */ ); >i->add_int_parameter(); >i->add_string_parameter(); >i->set_return_type(STRING); > >string ret = i(fd, 1, "somestring"); > > >That ought to be possible, or..? > > / Marcus Agehall (PacketFront) >

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full MySQL 4.x support. or pike roadmap
by thomas.gusenleitner＠com-bet.com ＠ Pike developers forum 28 Feb '26

28 Feb '26

HI to all! mysql 4.x support works only with a mysql CFLAGS=-DUSE_OLD_FUNCTIONS is this correct ? are there plans to make a full 4.x support ? bye, thomas

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Pike Meet-up 2018-Q1
by Henrik Grubbstr�m (Lysator) ＠ Pike (-) developers forum 20 Oct '21

20 Oct '21

Hi. At Pike Conference 2017 it was decided that we ought to hold a more informal meeting in Linköping ~ once every quarter. As the three month mark from the conference is coming up soon, it seems time to announce the first such meeting for 2018: Pike Meet-up 2018-Q1 Date: 2018-02-03 (Sat) Time: 10:00 - afternoon/evening Place: Roxen IS AB S:t Larsgatan 22A Linköping Welcome! /grubba

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BA_INIT_ALIGNED
by Marcus Comstedt (ACROSS) (Hail Ilpalazzo!) ＠ Pike (-) developers forum 08 Mar '21

08 Mar '21

In August 2013, Arne added support for alignment to block_allocator. In doing so, he also introduced a dependency on memalign/posix_memalign. I was planning on rewriting this support to work without memalign, but then I started looking for places which _use_ this functionality, and found none. Pike seems to build just fine without it. If it's dead code, maybe it's better to just remove it?

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Changing the DefaultBackend ?
by Stephen R. van den Berg 23 Feb '21

23 Feb '21

How does one change the DefaultBackend in Pike? I tried something like: int main(int argc, array(string) argv) { Pike.DefaultBackend = Pike.PollDeviceBackend(); return -1; } Which results in: Illegal lvalue. -- Stephen.

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Disabling optimizations
by H William Welliver 18 Feb '21

18 Feb '21

As I’m working on the debugger, I find myself spending a lot of time scratching my head only to realize that pike has, in the course of its many brilliant optimizations, decided to execute code in a way I’m not expecting. Is there a way to disable optimizations so that the flow of code is a little bit closer to what’s in the source? I suspect this would be helpful for users trying to to use a debugger as well.

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Questions about LiveBacktraceFrame
by H William Welliver 18 Feb '21

18 Feb '21

Hello all- Given the following bttest.pike on a recent pike master, I get some unexpected behavior. int main(int argc, array argv) { mixed bt = backtrace(1)[(int)argv[1]]; write("%O\n", bt->fun); for(int i = 0; i < bt->num_locals; i++) write("%O: %O\n", bt->get_local_name(i), bt->get_local(i)); return 0; } Run 1: bin/pike bttest 0 master()->_main "debugger": ({ /* 5 elements */ "/Users/hww3/pikedbg/build/darwin-18.7.0-x86_64/pike", "-DPRECOMPILED_SEARCH_MORE", "-m/Users/hww3/pikedbg/build/darwin-18.7.0-x86_64/master.pike", "bttest", "0" }) "argv": ({ /* 2 elements */ "/Users/hww3/pikedbg/bttest", "0" }) "debug": 0 "trace": 0 "run_tool": 0 "tmp": Getopt "postparseaction": 0 "parts": 0 "i": master()->Version(8.1) "have_debugger": 0 "debugger_wait": 0 "debugger_signal": 0 "debugger_port": 0 "t": /Users/hww3/pikedbg/bttest "err": 0 "script": /Users/hww3/pikedbg/bttest() "first_arg": int 0: 0 0: 0 0: 0 0: 0 0: 0 0: 0 0: 0 0: 0 Run 2: bin/pike bttest 1 /main()->main 0: 2 0: ({ /* 2 elements */ "/Users/hww3/pikedbg/bttest", "1" }) "bt": _static_modules.Builtin()->LiveBacktraceFrame() 0: 3 Some questions: 1. It seems logical to me that out-of-scope locals have a local name of zero. However, it’s strange to me that function arguments, while treated as locals, don’t have names (see both examples). 2. It’s also strange that the for-loop variable ‘i' doesn’t have a name. If I move the definition of ‘i’ ahead of the for loop, it does have a name. 3. The value of “debugger” from the first listing looks more like the value of orig_argv, which doesn’t appear elsewhere in the locals list. I also don’t seem to have a variable called “debugger” in my definition of “_main” (but there is a variable called “debugger” in the containing (master) object. Am I doing something wrong in my use of these frames? I get similar strange behavior in the debugger itself, when the thread of the backtrace I’m examining is paused. Bill

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Need assistance decoding a gc fatal
by H William Welliver 13 Feb '21

13 Feb '21

I’ve been working on updating/enhancing the debugger concept code and I’ve run into a situation where a gc fatal report is generated. I’m not exactly sure what it’s trying to say, as I /think/ the data all makes sense (though I’m unclear what 2+0 internal refs vs 2 refs might mean. The pike in question is based on master from quite a while ago. I tried merging current master (which itself was a surprisingly easy task), but pike fails to compile due to typechecker errors. I tried building straight from master, but the build similarly fails with --with-debug and without that, pike compiles but fails to start. I’m hoping that doesn’t prevent coming up with an explanation for the problem. I believe the “thing” in question is the main program, which comes from a file called file.pike. I’ve created a breakpoint object( for a line in this program), which is a PIKECLASS defined in _Debug/debug.cmod. The breakpoint object /does/ hold a reference to the program containing the breakpoint, but at this point, the breakpoint object hasn’t been destroyed. Can anyone detect a problem from this report? Bill ---CUT HERE --- /Users/hww3/pikedbg/src/gc.c:1938: GC fatal: Thing is getting more internal refs (2 + 0) than refs (2). (Could be an extra free somewhere, or a pointer might have been checked more than once.) **Block: 0x10dd303f0 Type: program Refs: 2 **Got gc marker at 0x10dd303f0: flags=0x00002 refs=2 weak=0 xrefs=0 saved=2 frame=0x0 **Program id: 65669, flags: f, parent id: -1 **Location: /Users/hww3/pikedbg/file.pike:0 **Identifiers: ** 0 fun: name: main addr: 0x24 ** 1 fun: use name: f addr: 0x360 ******************* **Looking for references to 0x10dd303f0: ***One ref found as mapping index. -> from mapping 0x7faf328004d0 offset -8362904 **In index program(/Users/hww3/pikedbg/file.pike) **Block: 0x7faf328004d0 Type: mapping Refs: 1 Refs=1, next=0x7faf32800490, prev=0x7faf32800510, flags=0x0, size=33, hashsize=16 Indices type field = program Values type field = string ([ /* 33 elements */ master: "/master", object_program(Getopt): "/Users/hww3/pikedbg/lib/modules/Getopt.pmod", /main: "/main", object_program(Debug): "/Users/hww3/pikedbg/lib/modules/Debug.pmod/module.pmod", object_program(Debug.Debugger): "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/module.pmod", Debug.Debugger.Breakpoint: "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/Breakpoint.pike", Debug.Debugger.DebugServer: "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/DebugServer.pike", object_program(Debug.Debugger.DebugAdapterProtocol): "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/DebugAdapterProtocol.pmod", - - - trimmed for brevity ]) ******************* ----------end------------ ***One ref found as mapping value. -> from mapping 0x7faf328003d0 offset 537720 **In value with index "/main" **Block: 0x7faf328003d0 Type: mapping Refs: 1 Refs=1, next=0x7faf32800290, prev=0x7faf32800350, flags=0x0, size=33, hashsize=16 Indices type field = string Values type field = program ([ /* 33 elements */ "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/Breakpoint.pike": Debug.Debugger.Breakpoint, "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/DebugAdapterProtocol.pmod": object_program(Debug.Debugger.DebugAdapterProtocol), "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/DebugServer.pike": Debug.Debugger.DebugServer, "/Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/module.pmod": object_program(Debug.Debugger), "/Users/hww3/pikedbg/lib/modules/Debug.pmod/module.pmod": object_program(Debug), "/Users/hww3/pikedbg/lib/modules/Pike.pmod/module.pmod": object_program(Pike), - - - trimmed for brevity "/main": /main, "/master": master ]) ******************* ----------end------------ ***One ref found. -> from object 0x7faf3286eaa0 offset 10033200 **In storage for inherit 0 **In variable prog **In storage for inherit 1 (debug_breakpoint) **Block: 0x7faf3286eaa0 Type: object Refs: 1 **Got gc marker at 0x7faf3286eaa0: flags=0x00002 refs=1 weak=0 xrefs=0 saved=1 frame=0x0 **Program id: 65699 **Object variables: ** === In inherit "debug_breakpoint", program 65626: ** rtt: program name: prog off: 0 value: program(/Users/hww3/pikedbg/file.pike) ** rtt: string name: programs_fname off: 8 value: "/Users/hww3/pikedbg/file.pike" ** rtt: string name: real_path off: 16 value: "/Users/hww3/pikedbg/file.pike" ** rtt: string name: within_fname off: 24 value: "/Users/hww3/pikedbg/file.pike" ** rtt: int name: line_number off: 32 value: 18 ** rtt: int name: enabled off: 40 value: 1 ** rtt: int name: want_enabled off: 48 value: 0 **Describing program 0x10dd33000 of object: **Got gc marker at 0x10dd33000: flags=0x00002 refs=4 weak=0 xrefs=0 saved=4 frame=0x0 **Program id: 65699, flags: 202f, parent id: -1 **The program was written in C. **Location: /Users/hww3/pikedbg/lib/modules/Debug.pmod/Debugger.pmod/Breakpoint.pike:0 **There is no parent (any longer?) ******************* ----------end------------ ***One ref found as the program of an object. **Block: 0x7faf3286ea50 Type: object Refs: 5 **Program id: 65669 **Object variables: ** (none) **Describing program 0x10dd303f0 of object: **Got gc marker at 0x10dd303f0: flags=0x00002 refs=2 weak=0 xrefs=0 saved=2 frame=0x0 **Program id: 65669, flags: f, parent id: -1 **Location: /Users/hww3/pikedbg/file.pike:0 **There is no parent (any longer?) ******************* ----------end------------ ***One ref found in current_program in frame on stack. **Block: 0x7faf32821b38 Type: pike_frame Refs: 1 **Function f at /Users/hww3/pikedbg/file.pike:14 ******************* ----------end------------ ***One ref found in current_program in frame on stack. **Block: 0x7faf32821aa0 Type: pike_frame Refs: 1 **Function main at /Users/hww3/pikedbg/file.pike:2 ******************* ----------end------------ ***One ref found on svalue stack. -> from pike_frame 0x7faf32821a08 offset -140385920272696 **At position 12 among locals **Block: 0x7faf32821a08 Type: pike_frame Refs: 1 **Function _main at /Users/hww3/pikedbg/build/darwin-18.7.0-x86_64/master.pike:4069 ******************* ----------end------------ **Done looking for references to 0x10dd303f0, found 7 refs. Pike was in GC stage 100 when this fatal occurred. Backtrace at time of fatal: src/modules/_Debug/debug.cmod:652: lib/modules/Debug.pmod/Debugger.pmod/Breakpoint.pike() -:1: Stdio.FILE(2, "w", 777 /* fd=2 */)->write("\nSending response: \nContent-Length: 228\r\n\r\n{\"request_seq\":16,\"seq\":0,\"body\":{\"threads\":[{\"name\":\"Thread.Thread(4541273536)\",\"id\":4541273536},{\"nam"+[80]+"\"message\":null,\"success\":1,\"type\":\"response\"}\n") lib/modules/Stdio.pmod/module.pmod:1105: Stdio.FILE(2, "w", 777 /* fd=2 */)->write("\nSending response: \nContent-Length: 228\r\n\r\n{\"request_seq\":16,\"seq\":0,\"body\":{\"threads\":[{\"name\":\"Thread.Thread(4541273536)\",\"id\":4541273536},{\"nam"+[80]+"\"message\":null,\"success\":1,\"type\":\"response\"}\n") lib/modules/Stdio.pmod/module.pmod:2239: Stdio.FILE(2, "w", 777 /* fd=2 */)->write("\nSending response: \nContent-Length: 228\r\n\r\n{\"request_seq\":16,\"seq\":0,\"b"+[180]+"1,\"type\":\"response\"}\n","Content-Length: 228\r\n\r\n{\"request_seq\":16,\"seq\":0,\"body\":{\"threads\":[{\"n"+[159]+":1,\"type\":\"response\"}") build/darwin-18.7.0-x86_64/master.pike:6576: werror("\nSending response: \n%s\n","Content-Length: 228\r\n\r\n{\"request_seq\":16,\"seq\":0,\"body\":{\"threads\":[{\"name\":\"Thread.Thread(4541273536)\",\"id\":4541273536},{\"na"+[87]+"ge\":null,\"success\":1,\"type\":\"response\"}") lib/modules/Debug.pmod/Debugger.pmod/DebugServer.pike:31: Debug.Debugger.DebugServer()->write_response(Debug.Debugger.DebugAdapterProtocol.ThreadsResponse()) lib/modules/Debug.pmod/Debugger.pmod/DebugServer.pike:145: Debug.Debugger.DebugServer()->handle_threads_request(mapping[3]) lib/modules/Debug.pmod/Debugger.pmod/DebugServer.pike:678: Debug.Debugger.DebugServer()->breakpoint_read(Stdio.File("socket", "127.0.0.1 51892", 777 /* fd=10 */),"Content-Length: 47\r\n\r\n{\"command\":\"threads\",\"type\":\"request\",\"seq\":16}") lib/modules/Stdio.pmod/module.pmod:1165: Stdio.File("socket", "127.0.0.1 51892", 777 /* fd=10 */)->__stdio_read_callback() -:1: Pike.Backend(1)->`()(1000.0) lib/modules/Debug.pmod/Debugger.pmod/DebugServer.pike:540: Debug.Debugger.DebugServer()->__lambda_65700_0_line_540() Abort trap: 6

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Programs with multiple offsets per line
by H William Welliver 12 Feb '21

12 Feb '21

I seem to recall a discussion a year or two ago regarding the fact that a program may have multiple offsets per line (at the time, the breakpoint code I’d written only used the first offset). What scenarios might result in multiple offsets being associated with a single line of code? I’ve tried a few things that would seem obvious (multiple statements, etc), but haven’t been able to detect the situation using the existing code (even when it’s been adjusted to look for it). Bill

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Pike-devel February 2021