similar to: [LLVMdev] sjlj-exceptions handlying

On Tuesday 17 February 2009 02:21:55 zhengjian zhang wrote: > in llvm-backend did't support sjlj-exceptions handlying,but support > dwarf-excceptions handlying, > my question is: if i want change llvm-backend to support, how should i Do ? > anyone can give some clue? It's hard to say - I'm not sure anyone here knows how gcc handles sj/lj style exceptions, or has a good

my ugly way about the sjlj-eh is: in the last part of the llvm codegen build some relative sjlj-eh runtime function. ok, why i do like that, because i want quick run of the sjlj-en for my target., above method,based on the dwarf-eh(llvm used), now the other work of my method are emit except table, also base on llvm, now i have problem about the emit except table for sjlj. because llvm used

Hi, I have checkout llvm from the svn, eh_sjlj_setjmp/longjmp intrinsics had beed added ! but it seems llvm-gcc does't generate the eh_sjlj_setjmp/longjmp intrinsics now ? best regards zhangzw

Hi Duncan, >>I don't get it. Sorry my bad English! hehe. >>What has this got to do with determining the >>names "@__cxa_throw" and "@_ZTi"? Record the Information into the MachineModule Info, so in Dwarfwriter or SjLjWriter(my sjlj-eh name) can build the except table correctly! 2009/3/26 Duncan Sands <baldrick at free.fr>: > Hi zhangzw,

Hi Evan, >>Is it possible to implement it without using MachineModuleInfo? but llvm-2.5 didn't , if implement it without using MachineModuleInfo, so I should create another ADT, but that is mostly same to MachineModuleInfo, that's repeat work! or less cost for me ! >> It's being removed. if so, what's the replacement of the MachineModuleInfo ? zhangzw

Hi, >On the other hand, it's not completely possible to separate it from >the front end either since different languages can have different >semantics. Ada, C++, Objective C, etc.. Sometimes these can be handled >the same way under the hood, but it's dangerous for the compiler to >assume that to be true. At least some knowledge needs to be in the >front end code-gen.

hi, I'm doing to make llvm backend support sjlj-eh! I have try to use the llvm-IR to generate the sjlj-eh code, but I'm totally despair ! my major problem is that llvm-ir , I mean exception instrinstics are enough for codegen the sjlj-eh code? May I need to modify the llvm-gcc ? or someone can give some advice about llvm-backend 's support sjlj-eh ? best regards

On Feb 17, 2009, at 12:50 AM, Duncan Sands wrote: > I'm not sure anyone here knows how gcc handles sj/lj style exceptions, Or, reworded slightly, some people here wrote it. :-)

> > I'm not sure anyone here knows how gcc handles sj/lj style exceptions, > > Or, reworded slightly, some people here wrote it. :-) Excellent! To handle dwarf eh, LLVM has an intrinsic to get hold of an exception object (eh.exception) and an intrinsic for matching the exception against a list of typeinfo objects (eh.selector). These get morphed into calls to the gcc unwinder

On Tuesday 17 February 2009 18:04:43 Mike Stump wrote: > On Feb 17, 2009, at 8:59 AM, Duncan Sands wrote: > > Excellent! To handle dwarf eh, LLVM has an intrinsic to get hold of > > an exception object (eh.exception) and an intrinsic for matching the > > exception against a list of typeinfo objects (eh.selector). These > > get morphed into calls to the gcc unwinder lib

On Feb 17, 2009, at 8:59 AM, Duncan Sands wrote: > Excellent! To handle dwarf eh, LLVM has an intrinsic to get hold of > an exception object (eh.exception) and an intrinsic for matching the > exception against a list of typeinfo objects (eh.selector). These > get morphed into calls to the gcc unwinder lib by the code generator. > Can sj/lj follow a similar scheme? Don't see

here are the cpp file: $ cat -n eh1.catch.cpp 1 #include <iostream> 2 3 int main() 4 { 5 try { 6 throw 78; 7 } 8 catch (int){ 9 10 std::cout << "at catch\n"; 11 12 } 13 } LLVM-IR: $ llvm-g++ -S -emit-llvm eh1.catch.cpp -o eh1.catch.ll ... 46 define i32 @main() {

Hi, >> from the exist llvm-ir it seems there are some common info for sjlj-eh >> and dwarf-eh! >> are there possible use the exist llvm-ir to generate exception table > >for sjlj-eh ? >No. There should be support from llvm-gcc. sjlj eh and dwarf eh have >different semantics different semantics ? ! I think llvm-gcc generate the IR should not include the exception

Hi, >There's definitely more to it than the current intrinsics, which are >there to support dwarf. from the exist llvm-ir it seems there are some common info for sjlj-eh and dwarf-eh! are there possible use the exist llvm-ir to generate exception table for sjlj-eh ? zhangzw

Hi, many people suggest that if we want llvm to support sjlj-eh, we should modify the llvm-gcc to generate sjlj-style IR. yeah, I'm digging into the llvm-gcc now. there are some functions, at the llvm-gcc e.g TreeToLLVM::CreateExceptionValues() , BasicBlock *TreeToLLVM::getPostPad(unsigned RegionNo), void TreeToLLVM::EmitLandingPads(), void TreeToLLVM::EmitPostPads() , void

I make a simple mail program which need listen port 25 and 110.but i found it's imposible , after searching with google i found non-root user can't listen port under 1024.at first i try a script(witch lauch my program) and use setuid but that still did't work.any way can handle this. Thanks for any help. -------------- next part -------------- An embedded message was scrubbed... From:

Hi, catch_all.cpp: 1 int main() 2 { 3 try { 4 throw 34; 5 } 6 catch (...) {} 7 } llvm-gcc -O3 -S -emit-llvm catch_all.cpp -o catch_all.ll: 1 ; ModuleID = 'catch_all.cpp' 2 target datalayout =

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