similar to: [LLVMdev] Could somebody please check this patch in: Bug 8518 - [patch][new feature] Function addresses in JIT can be printed out and imported to the external debugging tools

On Nov 22, 2010, at 4:38 PM, Yuri wrote: > http://llvm.org/bugs/show_bug.cgi?id=8518 Nicolas or Jeffrey, could you take a look at the patch attached to this bug? It will hopefully be unnecessary after the MC JIT happens, but seems useful in the meantime. -Chris

Have you found http://llvm.org/docs/DebuggingJITedCode.html? The JIT already has support for something like this for gdb's benefit. Perftools and valgrind just don't know how to find it yet. On Sat, Jun 19, 2010 at 2:03 PM, Yuri <yuri at rawbw.com> wrote: > This new option (--jit-emit-debug-function-range) will allow to output > function information for memory ranges that

On 06/19/2010 14:14, Jeffrey Yasskin wrote: > Have you found http://llvm.org/docs/DebuggingJITedCode.html? The JIT > already has support for something like this for gdb's benefit Yes, I saw it and tried it. -jit-emit-debug generates ELF image in memory with debug info. Another option -jit-emit-debug-to-disk creates .o ELF files with debug info, one per function. If there are thousands

This new option (--jit-emit-debug-function-range) will allow to output function information for memory ranges that functions occupy in memory while they run in JIT. File format generated is like this: ... 0x5000000 0x5001000 function_name_is_here ... This feature is useful for external tools like valgrind and google-perftools to profile the code when it is run in JIT. Particularly

This new option will allow to output function information in the same format as addr2line from binutils emits: ... 0xABCDEF01 T function_name_is_here ... This feature is useful to profile the code when it is run in JIT by external tools like valgrind and google-perftools. For example, google-perftools runs addr2line on executable and uses the resulting file to resolve memory addresses to

On 06/23/2010 23:44, Chris Lattner wrote: > This doesn't seem specific to the JIT. Can you add this to the normal code generator, and have the JIT leverage off that? Here are some minor comments, but the bigger issue of how this integrates seems important. > Why this isn't specific to JIT? It outputs memory addresses of functions while they are run in JIT. Can code be run

On Jun 24, 2010, at 12:02 AM, Yuri wrote: > On 06/23/2010 23:44, Chris Lattner wrote: >> This doesn't seem specific to the JIT. Can you add this to the normal code generator, and have the JIT leverage off that? Here are some minor comments, but the bigger issue of how this integrates seems important. >> > > Why this isn't specific to JIT? It outputs memory

When I try running simple example with exceptions through JIT I get this output: terminate called after throwing an instance of 'E*' Why exceptions don't work in JIT and what it takes to make them work? Yuri --- e.C --- #include <stdio.h> #include <stdlib.h> class E { }; void xmain() { try { throw new E; } catch (E *e) { printf("caught!\n");

On Mon, Jun 21, 2010 at 5:14 PM, Yuri <yuri at rawbw.com> wrote: > I am on FreeBSD and gdb-7.1 seems to be broken. It fails to set breakpoints > in shared libs. using symbol-file causes this message: > > (gdb) symbol-file /usr/local/llvm/svn-r105825.dbg/lib/libLLVM-2.8svn.so > Load new symbol table from > "/usr/local/llvm/svn-r105825.dbg/lib/libLLVM-2.8svn.so"? (y

On 06/19/2010 14:03, Yuri wrote: > This new option (--jit-emit-debug-function-range) will allow to output > function information for memory ranges that functions occupy in memory > while they run in JIT. File format generated is like this: > ... > 0x5000000 0x5001000 function_name_is_here > ... > > This feature is useful for external tools like valgrind and >

On Thu, Feb 20, 2014 at 1:58 PM, Yuri <yuri at rawbw.com> wrote: > On 02/18/2014 00:44, 杨勇勇 wrote: > >> I ported llvm backend and lldb recently. Both tools can basically work. >> lldb is able to debug programs in asm style and frame unwinding is OK. >> >> But "frame variable XX" does not work because lldb is not able to >> determine >> the

I need to know how deep is the stack allocated for the process (total for all functions)? How to set this size? Yuri

On 06/21/2010 14:14, Reid Kleckner wrote: > Since FreeBSD is an ELF target, this should work fine. I've also > tested that this works in 32-bit by building gdb and llvm in 32-bit > mode and testing this stuff while running on a 64-bit OS. > > I would try setting a breakpoint in gdb on > 'llvm::JITDebugRegisterer::RegisterFunction' to see that it is being > called,

I know you haven't been able to get the JIT gdb support to work on FreeBSD (right?), but this is exactly the problem that we ran into that it solves. http://llvm.org/docs/DebuggingJITedCode.html I don't know what heuristic gdb is trying to use to unwind the stack, but it doesn't work. I asked a gdb developer about it two summers ago when I was working on this, but he seemed

On 06/21/2010 18:01, Reid Kleckner wrote: > One thing you could do as a temporary work around is to link with LLVM > statically. There's already an open bug where if the JIT is in a > shared library, then you cannot run the program twice under gdb > without restarting gdb, which is really annoying. > > This affects me, and I do intend to fix it eventually. I'm not sure

Since FreeBSD is an ELF target, this should work fine. I've also tested that this works in 32-bit by building gdb and llvm in 32-bit mode and testing this stuff while running on a 64-bit OS. I would try setting a breakpoint in gdb on 'llvm::JITDebugRegisterer::RegisterFunction' to see that it is being called, and that getELFWriterInfo returns something. If that function actually

I run some code in JIT on x86-64 architecture. Even though llvm::NoFramePointerElim is set to true, I still see weird stack in gdb, see below. 800b485a4 is the current rip register where gdb stopped. Then many others values aren't valid. Then there is value that looks ok again. Why gdb can't determine stack? Yuri -- stack -- #0 0x0000000800b485a4 in ?? () #1 0x000000000000005f in

On 06/21/2010 11:14, Reid Kleckner wrote: > Yes, I have some version of 7.1 installed on my workstation and it works for me. I repeted what you did step by step and it still doesn't work for me, see log below. Two differences: I am on FreeBSD and it's 32 bit. It's svn revision 105825. Plus I have few unrelated patched applied to it which shouldn't matter. Yuri $ lli

You said this is on 32-bit x86? My understanding is that in that case, gdb will use ebp/esp to unwind the stack and doesn't need dwarf. It may have different behavior on FreeBSD if frame pointers are normally omitted on that platform. gdb ignores them on Linux x86_64 because they are generally omitted. This might actually be the best explanation for your symptoms, since this is what a gdb

I have this situation when the same code SEGVs in JIT with option -disable-fp-elim and works fine without it. How can this possibly happen? Is it possible that there is a bug in JIT that stack isn't properly lowered for local variables when prologs are present? Or maybe JIT can accidentally use ebp for some values when it's supposed to be only used by frame pointer value. Stack (see