January 2005 - Darwin-dev - lists.apple.com

Re: Stack trace queryable?
by Greg Hurrell 05 Jan '05

05 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com El 04/01/2005, a las 23:27, Sam Vaughan escribió: I haven't looked at the MoreBacktrace code, but you should be able to generate backtraces pretty simply with the following code: #define MoreBTPPCGetStackPointer(result) \ __asm__ volatile("mr %0,r1" : "=r" (result)); But the code is a lot more complicated than yours. Cheers, Greg _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Thanks a lot, Sam. The MoreBacktrace sample uses the same assembly to get the stack pointer: One thing that interests me is that both implementations seem to be designed to get the stack trace of the current thread. I wonder what would be necessary to get a stack trace of all threads in a running process. This email sent to site_archiver(a)lists.apple.com

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Re: Stack trace queryable?
by Sam Vaughan 04 Jan '05

04 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 05/01/2005, at 7:04 AM, darwin-dev-request(a)lists.apple.com wrote: El 29/12/2004, a las 15:55, Geoffrey Schmit escribió: On 27/12/2004 at 8:08 PM, support(a)monkeybreadsoftware.de (Christian Schmitz) wrote: You see a stack trace in the crash report every time so I ask myself if this list of function names can be queried inside a thread so I could add it to an exception object. MoreBacktrace does: Unfortunately, I wasn't able to get MoreBacktraceTest to compile, at least under Mac OS X 10.3.7/Darwin 7.7.0, so can't confirm that it works. The MoreIsBetter library itself does seem to compile, but the test program doesn't. It complains that it can't find MoreMemory.h while compiling MoreControls.cp: ../../MoreControls/MoreControls.cp:89:24: MoreMemory.h: No such file or directory No idea why this might be so because the other files included from MoreControls.cp are found without any problems. If I cheat by copying MoreMemory.h over into the MoreControls directory, then the project compiles but doesn't link: ld: warning prebinding disabled because of undefined symbols ld: Undefined symbols: _MoreMemError I haven't looked at the MoreBacktrace code, but you should be able to generate backtraces pretty simply with the following code: typedef struct stack_frame { struct stack_frame* next; int junk; void* addr; }stack_frame_t; #define BT_MAX 32 #define SF_MAX 4096 #define BT_LOAD(bt) \ do \ { \ bzero(bt, sizeof(bt)); \ register stack_frame_t* sf; \ asm volatile("mr %0,r1" : "=r" (sf)); \ int i; \ for (i = 0; i < BT_MAX; i++) \ { \ bt[i] = sf->addr; \ if (sf->next < sf || sf->next > sf + SF_MAX) \ break; \ sf = sf->next; \ } \ } while(0); Then to use it: void* bt[BT_MAX]; BT_LOAD(bt); Sam _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… can a function get the list of which functions called itself for debug purpose? <http://developer.apple.com/samplecode/MoreIsBetter/listing41.html> This email sent to site_archiver(a)lists.apple.com

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Re: Stack trace queryable?
by Greg Hurrell 03 Jan '05

03 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com El 29/12/2004, a las 15:55, Geoffrey Schmit escribió: On 27/12/2004 at 8:08 PM, support(a)monkeybreadsoftware.de (Christian Schmitz) wrote: can a function get the list of which functions called itself for debug purpose? You see a stack trace in the crash report every time so I ask myself if this list of function names can be queried inside a thread so I could add it to an exception object. MoreBacktrace does: ld: warning prebinding disabled because of undefined symbols ld: Undefined symbols: _MoreMemError Greg _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… <http://developer.apple.com/samplecode/MoreIsBetter/listing41.html> Unfortunately, I wasn't able to get MoreBacktraceTest to compile, at least under Mac OS X 10.3.7/Darwin 7.7.0, so can't confirm that it works. The MoreIsBetter library itself does seem to compile, but the test program doesn't. It complains that it can't find MoreMemory.h while compiling MoreControls.cp: ../../MoreControls/MoreControls.cp:89:24: MoreMemory.h: No such file or directory No idea why this might be so because the other files included from MoreControls.cp are found without any problems. If I cheat by copying MoreMemory.h over into the MoreControls directory, then the project compiles but doesn't link: This email sent to site_archiver(a)lists.apple.com

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'stray relocation PAIR' errors
by Bill Northcott 03 Jan '05

03 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Apologies for cross posting this, but I not sure which is appropriate. Bill Northcott _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… After several years of good service my Developer Tools installation on MacOS X 10.3.7 has broken badly. Any attempt to link object files results in errors like these: for C code ld: foo.o stray relocation PPC_RELOC_PAIR entry (608) in section (__TEXT,__text) for C++ code ld: foo.o malformed object (stray relocation PAIR entry (19) in section (__TEXT,__eh_frame)) I have replaced ar, as, ld and reinstalled the compiler. I have also tried gcc 3.1, 3.3 and 4.0. I even tried repairing permissions. None of these has made any difference. The problem does not seem to be with ld as it will relink previously compiled object files and I have tried both the version from Xcode 1.5 and the new one from November 2004 gcc update. I seem to be able to compile and run trivial code like 'HelloWorld' but not much more. I would really appreciate any suggestions as I have completely run out of ideas, and don't really understand the error. This email sent to site_archiver(a)lists.apple.com

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LD 'malformed object (stray relocation PAIR entry (1) in section (__TEXT, __eh_frame))'
by Bill Northcott 03 Jan '05

03 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Does anyone know what causes this? Bill Northcott _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I have run into problem trying to build a c++ package. This used to build for me about 3 months ago, but when I tried this week, it failed. Since the last successful build, I have installed the November Dev Tools update and I suspect the problem may have something to do with the new ld. The problem occurs at static link time with an error similar to ld: foo.o malformed object (stray relocation PAIR entry (1) in section (__TEXT,__eh_frame)) being issued for each linked symbol. I managed to find the same error posted by Shantonu Shen on the web at: http://paste.lisp.org/display/2518 Unfortunately this is just an image attached to an IRC message which is some 3 months old and I can't get the context. This email sent to site_archiver(a)lists.apple.com

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