similar to: [LLVMdev] debugging a pass for LTO

Hi, I'm trying to write a pass for LTO, and now I want to debug it using gdb. I use ld as my target file, but when I run the program in gdb, it reports [Thread debugging using libthread_db enabled] Cannot find new threads: generic error at Plugin::load() { #ifdef ENABLE_PLUGINS this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW); in binutil/src/gold/plugin.cc The gdb

Dear list memebers, I am stuck with using regular expressions. Imagine I have a vector of character strings like: test <- c('filename_1_def.pdf', 'filename_2_abc.pdf') How could I use regexpressions to extract only the 'def'/'abc' parts of these strings? Some try from my side yielded no results: testresults <-

I have a list of suffixes I want to turn into file names with extensions. suff<- c("C1", "C2", "C3") paste("filename_", suff[[1]], ".ext", sep="") [1] "filename_C1.ext" How do I use lapply() on that call to paste()? What's the right way to do this: filenames <- lapply(suff, paste, ...) ? Can I have lapply()

Thanks for your last reply. Could I understand the way to adding a pass (built into the llvm rather than dynamic loadable) includes: 1. Declaring a creator function for this pass 2. Implementing the creator function for this pass 3. Instantiating this pass and get a object of it 3. Register this pass into the PassRegistry Then, for a built-into bytecode pass, task 1(declaration of the

Hi, developers, Recently, I read two papers [1], [2] about finding the root causes of compiler bugs. However, I do not find any information in these paper about how compiler developers find the root causes of compiler bugs in practice. So I am curious whether these techniques are useful in practice. For my experience, the outputs of compilers are always used to isolate the causes of compiler

Instant Rails is a one-stop Rails runtime solution containing Ruby, Rails, Apache, and MySQL, all preconfigured and ready to run. No installer, you simply drop it into the directory of your choice and run it. It does not modify your system environment. This release of Instant Rails is for Windows, but there are plans for ports to Linux, BSD, and OSX. This release upgrades Rails to 1.1 and the

Also add an inline accessor function (get_handle). This also removes the unused function connection_get_handle. --- server/internal.h | 24 ++++++++++++++++----- server/backend.c | 50 ++++++++++++++++++++++---------------------- server/connections.c | 11 +--------- 3 files changed, 45 insertions(+), 40 deletions(-) diff --git a/server/internal.h b/server/internal.h index

Hi, I've just tried to install winex under a mdk 8.1 linux distrib. All seems to be right untill i launch wineinstall: After answering yes,yes,/c I obtain this message : Configuring Wine for a no-windows install in /c... Created /root/.wine/config using default Wine configuration. You probably want to review the file, though. Compiling regapi... rm -f regapi && ln -s ../../wine

look at dev.new() to specify plot window size and then ?layout to specify number and size of each plot in the window Jiaqi.Zhang wrote > Hi, all, > > I am working on the following code to learn how to plot graphs together. I > used the par(mfrow=c(1,3)) function to try to put all three plot() graphs > together. But it always fail without any error message? Can anybody help

Hi all, I am using llvm to perform some static analysis with a module pass. In getAnalysisUsage(), I specified some required passes by: addRequiredTransitive<LoopInfo>(); When I run my pass using opt, it crashes with segmentation fault with callstack: #0 0x0877aebd in llvm::PMTopLevelManager::findAnalysisUsage (this=0x8c10934, P=0xb15b988) at PassManager.cpp:573 #1 0x0877aa9b in

In general, finding the root cause in LLVM is not really a big difference than debugging a normal software: Depending on the scenario, if it’s a crash then putting it on a gdb is probably the first step you wanna do. And this usually can tell you the answer pretty fast. More tricky scenarios usually involving developers to leverage various of LLVM-specific diagnosing features, the

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In https://gitlab.com/nbdkit/nbdkit/-/merge_requests/30, Khem reports that in a cross-compilation environment, nbdkit embeds the absolute name of the cross-compiler into the resulting cc plugin, even though running the plugin should be favoring the bare name 'cc'. This in turn leads to non-reproducible builds. As the goal of cross-compiling nbdkit is to produce a binary that behaves

On Fri, Aug 18, 2023 at 08:27:45AM -0500, Eric Blake wrote: > In https://gitlab.com/nbdkit/nbdkit/-/merge_requests/30, Khem reports > that in a cross-compilation environment, nbdkit embeds the absolute > name of the cross-compiler into the resulting cc plugin, even though > running the plugin should be favoring the bare name 'cc'. This in > turn leads to non-reproducible

The retry filter was originally written to be the closest filter to the plugin, with no other filters in between; as such, the reopen command did not have to worry about recursion or about .prepare or .finalize. But it is not that much harder to properly track everything needed to allow other filters to be retried, as long as we are careful to never call .finalize unless .prepare succeeded, never

This is an FYI to all people who are writing LLVM passes (mostly 426 people) about a useful feature of LLVM. The "Support/StatisticReporter.h" file provides two useful features that you may want to make use of in your pass (http://llvm.cs.uiuc.edu/doxygen/StatisticReporter_8h-source.html): 1. Statistics output - Often you may run your pass on some big program, and you're

--- configure.ac | 5 +++++ plugins/vddk/vddk.c | 4 ++++ 2 files changed, 9 insertions(+) diff --git a/configure.ac b/configure.ac index d71f06e4..57626a76 100644 --- a/configure.ac +++ b/configure.ac @@ -321,6 +321,11 @@ AC_SEARCH_LIBS([dlsym], [dl dld], [ ]) LIBS="$old_LIBS" +old_LIBS="$LIBS" +LIBS="$LIBS -ldl" +AC_CHECK_FUNCS([dlmopen])

Good evening, guys! I have built dragonegg.dll on cygwin and it works (it seems). I have not tried stage2 build yet. It would be applicable to also mingw32-gcc to enhance gcc/plugin.c. ...Takumi [Instructions] 1. Apply two patches. one is for gcc/config/i386/i386.c. --- a/gcc/configure +++ b/gcc/configure @@ -25621,6 +25621,9 @@ rm -f core conftest.err conftest.$ac_objext \ fi

It's confusing to use the same terminology for a single backend as for the linked list of backends. In particular it's often not clear if we're calling the next backend or the whole chain of backends. --- server/internal.h | 14 ++++++++++-- server/connections.c | 20 ++++++++--------- server/locks.c | 2 +- server/main.c

I couldn't get this to work in the end. This is the latest non-working version. This email documents what doesn't work for the permanent record. The central problem is that VDDK InitEx() appears to dlopen() various of its own plugins. Although I wasn't able to capture exactly what dlopen() command it is running, the plugins cannot be loaded because they rely on the recompiled