search for: emitdwarftable

Hello, I'd like some advice on a crash that we have observed on MacOSX with the 2.8 and 2.9 releases of LLVM, but not on the top of trunk. The crash is a null-deref in llvm::JITDwarfEmitter::EmitDwarfTable : Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000 0x0000000100852203 in llvm::JITDwarfEmitter::EmitDwarfTable () at context.h:491 (gdb) bt #0 0x0000000100852203 in llvm::JITDwarfEmitter::EmitDwarfTable () at context.h:49...

...n my side. Christophe On 19 avr. 2011, at 17:38, Christophe de Dinechin wrote: > Hello, > > > I'd like some advice on a crash that we have observed on MacOSX with the 2.8 and 2.9 releases of LLVM, but not on the top of trunk. The crash is a null-deref in llvm::JITDwarfEmitter::EmitDwarfTable : > > Program received signal EXC_BAD_ACCESS, Could not access memory. > Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000 > 0x0000000100852203 in llvm::JITDwarfEmitter::EmitDwarfTable () at context.h:491 > (gdb) bt > #0 0x0000000100852203 in llvm::JITDwarfEmitter::Emi...

...ActualSize); > > > > - BufferEnd = BufferBegin+ActualSize; > > > > - EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin; > > > > - uint8_t *EhStart; > > > > - uint8_t *FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, > > > > - EhStart); > > > > + while (true) { > > > > + BufferBegin = CurBufferPtr = > > > > MemMgr->startExceptionTable(F.getFunction(), > > > > + > &gt...

...tion(llvm::Function*) + 686 8 lli 0x0000000000d67c86 llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) + 70 9 lli 0x0000000000d62805 llvm::JITDwarfEmitter::EmitCommonEHFrame(llvm::Function const*) const + 613 10 lli 0x0000000000d60ac3 llvm::JITDwarfEmitter::EmitDwarfTable(llvm::MachineFunction&, llvm::JITCodeEmitter&, unsigned char*, unsigned char*, unsigned char*&) + 335 ... Ciao, Duncan.

...6 > 8 lli 0x0000000000d67c86 > llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) + 70 > 9 lli 0x0000000000d62805 > llvm::JITDwarfEmitter::EmitCommonEHFrame(llvm::Function const*) const + 613 > 10 lli 0x0000000000d60ac3 > llvm::JITDwarfEmitter::EmitDwarfTable(llvm::MachineFunction&, > llvm::JITCodeEmitter&, unsigned char*, unsigned char*, unsigned char*&) + > 335 > ... > Thanks for looking at this. Yes, I realise this will link to bitcode and that the result is a script that runs lli. I kind of just expected JIT to work, particu...

...0x0000000000d67c86 >> llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) + 70 >> 9 lli 0x0000000000d62805 >> llvm::JITDwarfEmitter::EmitCommonEHFrame(llvm::Function const*) const + 613 >> 10 lli 0x0000000000d60ac3 >> llvm::JITDwarfEmitter::EmitDwarfTable(llvm::MachineFunction&, >> llvm::JITCodeEmitter&, unsigned char*, unsigned char*, unsigned char*&) + >> 335 >> ... >> > Thanks for looking at this. > > Yes, I realise this will link to bitcode and that the result is a script > that runs lli. I kind of...

...rPtr = MemMgr->startExceptionTable(F.getFunction(), - ActualSize); - BufferEnd = BufferBegin+ActualSize; - EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin; - uint8_t *EhStart; - uint8_t *FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, - EhStart); + while (true) { + BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(), + ActualSize); + BufferEnd = BufferBegin+Act...

On Aug 21, 2012, at 2:12 PM, Michael Muller <mmuller at enduden.com> wrote: > > Hi, I found a bug in the code that generates exception tables, I've attached > what I think is the correct fix. > > When you run out of space writing to a buffer, the buffer management code > simply stops writing at the end of the buffer. It is the responsibility of > the caller to

Eric Christopher wrote: > > On Aug 21, 2012, at 2:12 PM, Michael Muller <mmuller at enduden.com> wrote: > > > > > Hi, I found a bug in the code that generates exception tables, I've attached > > what I think is the correct fix. > > > > When you run out of space writing to a buffer, the buffer management code > > simply stops writing at the

...Function*) + 686 > 8 lli 0x0000000000d67c86 llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) + 70 > 9 lli 0x0000000000d62805 llvm::JITDwarfEmitter::EmitCommonEHFrame(llvm::Function const*) const + 613 > 10 lli 0x0000000000d60ac3 llvm::JITDwarfEmitter::EmitDwarfTable(llvm::MachineFunction&, llvm::JITCodeEmitter&, unsigned char*, unsigned char*, unsigned char*&) + 335 > ... > Thanks for looking at this. > > Yes, I realise this will link to bitcode and that the result is a script that runs lli. I kind of just expected JIT to work, partic...

2010/1/22 Duncan Sands <baldrick at free.fr> > Hi James, > > > Yes - sorry I was unclear. I have pruned everything down to a pretty >> minimal test: >> - LLVM 2.6 compiled from source >> - A slightly modified version of Duncan's example ll assembly posted >> earlier >> - A minimal personality function (just a call to fprintf()) in a separate

Hi James, > Yes - sorry I was unclear. I have pruned everything down to a pretty > minimal test: > - LLVM 2.6 compiled from source > - A slightly modified version of Duncan's example ll assembly posted earlier > - A minimal personality function (just a call to fprintf()) in a > separate C file compiled with gcc-llvm > - A single C++ function in a third file that simply

...r = CurBufferPtr; > + > + BufferBegin = CurBufferPtr = MemMgr- > >startExceptionTable(F.getFunction(), > + > ActualSize); > + BufferEnd = BufferBegin+ActualSize; > + unsigned char* FrameRegister = DE->EmitDwarfTable(F, *this, > FnStart, FnEnd); > + MemMgr->endExceptionTable(F.getFunction(), BufferBegin, > CurBufferPtr, FrameRegister); > + BufferBegin = SavedBufferBegin; > + BufferEnd = SavedBufferEnd; > + CurBufferPtr = SavedCurBufferPtr; > + > + TheJIT->Registe...

Dear all, Here's a new patch with Evan's comments (thx Evan!) and some cleanups. Now the (duplicated) exception handling code is in a new file: lib/ExecutionEngine/JIT/JITDwarfEmitter. This patch should work on linux/x86 and linux/ppc (tested). Nicolas -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: jit-exceptions.patch URL:

Interesting. Was this the reason you were getting the recursive compilation error in JIT::runJITOnFunctionUnlocked(...) (isAlreadyCodeGenerating)? Do you have the time to try your test with 2.7? Garrison On Jan 22, 2010, at 17:37, James Williams wrote: > I've worked around this issue in my test case by simply calling my personality function on program to ensure it's JIT'ed

Hi everyone, vmkit requires to know the size of a jitted method before emitting the method. This allows to allocate the correct size for the method. The attached patch creates this functionality when the flag SizedMemoryCode is on. In order to implement this functionality, i had to virtualize some MachineCodeEmitter functions. Is it OK to commit the patch? Thanks, Nicolas --------------

...000d66d32 in llvm::ExecutionEngine::getPointerToGlobal (this=0x1781e90, GV=0x17196b0) at ExecutionEngine.cpp:473 #6 0x0000000000d618b1 in llvm::JITDwarfEmitter::EmitCommonEHFrame (this=0x177a3c0, Personality=0x17196b0) at JITDwarfEmitter.cpp:522 #7 0x0000000000d5fb6f in llvm::JITDwarfEmitter::EmitDwarfTable (this=0x177a3c0, F=..., jce=..., StartFunction=0x7ffff7f4c090 "H\203\354\bH\270 @\376\367\377\177", EndFunction=0x7ffff7f4c0b6 "\315\315c\374\037", EHFramePtr=@0x7fffffffd8b0) at JITDwarfEmitter.cpp:55 #8 0x0000000000d46599 in finishFunction (this=0x1788380, F=...) at J...

...<< sys::disassembleBuffer(FnStart, FnEnd-FnStart, >> (uintptr_t)FnStart); >> #endif >> + >> if (ExceptionHandling) { >> uintptr_t ActualSize; >> + if (SizedMemoryCode) { >> + SizeEmitter sz(LabelLocations); >> + DE->EmitDwarfTable(F, sz, FnStart, FnEnd); >> + ActualSize = sz.getCurrentPCValue(); >> + } >> SavedBufferBegin = BufferBegin; >> SavedBufferEnd = BufferEnd; >> SavedCurBufferPtr = CurBufferPtr; >> - >> + >> BufferBegin = CurBufferPtr = MemMgr-...

...assembled code:\n" > << sys::disassembleBuffer(FnStart, FnEnd-FnStart, > (uintptr_t)FnStart); > #endif > + > if (ExceptionHandling) { > uintptr_t ActualSize; > + if (SizedMemoryCode) { > + SizeEmitter sz(LabelLocations); > + DE->EmitDwarfTable(F, sz, FnStart, FnEnd); > + ActualSize = sz.getCurrentPCValue(); > + } > SavedBufferBegin = BufferBegin; > SavedBufferEnd = BufferEnd; > SavedCurBufferPtr = CurBufferPtr; > - > + > BufferBegin = CurBufferPtr = MemMgr- > >startExceptionTable(F.g...

...gt;>> llvm::ExecutionEngine::getPointerToGlobal(llvm::GlobalValue const*) + 70 >>> 9 lli 0x0000000000d62805 >>> llvm::JITDwarfEmitter::EmitCommonEHFrame(llvm::Function const*) const + 613 >>> 10 lli 0x0000000000d60ac3 >>> llvm::JITDwarfEmitter::EmitDwarfTable(llvm::MachineFunction&, >>> llvm::JITCodeEmitter&, unsigned char*, unsigned char*, unsigned char*&) + >>> 335 >>> ... >>> >> Thanks for looking at this. >> >> Yes, I realise this will link to bitcode and that the result is a script &...