llvm-prof | the mirror of llvm-prof extract from llvm release | Compiler library

by xiehuc C++ Version: Current License: Non-SPDX

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kandi X-RAY | llvm-prof Summary

llvm-prof is a C++ library typically used in Utilities, Compiler applications. llvm-prof has no bugs, it has no vulnerabilities and it has low support. However llvm-prof has a Non-SPDX License. You can download it from GitHub.

the mirror of llvm-prof extract from llvm release 3.3

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Support

llvm-prof has a low active ecosystem.

It has 7 star(s) with 3 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of llvm-prof is current.

Quality

llvm-prof has no bugs reported.

Security

llvm-prof has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

llvm-prof has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

llvm-prof releases are not available. You will need to build from source code and install.

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llvm-prof Key Features

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llvm-prof Examples and Code Snippets

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Community Discussions

Trending Discussions on llvm-prof

xcrun llvm-cov show: No coverage data found

clang++ always generates empty profraw coverage reports

pyenv won't build new python version (hangs)

Clang does not generate profraw file when linking manually

Writing Python script to automate llvm code coverage test

Error building LLVM on Windows - LNK1104

How to understand output of "llvm-profdata show"

PGO: Why is XCode generating an empty .profdata file?

QUESTION

xcrun llvm-cov show: No coverage data found

Asked 2021-Feb-26 at 11:05

What are the possible reasons for xcrun llvm-cov show command to return error: Failed to load coverage: No such file or directory?

I have an iOS lib. The result of the lib build is *.a binary file. I have a scheme in the project which also contains GTest unit tests.

So I execute:

...

ANSWER

Answered 2021-Feb-26 at 11:05

I faced the same issue with my static lib that Xcode was building.

With some exploration, I noticed that passing in explicit .o files generated during the build seemed to work, but output was limited to just that file.

Source https://stackoverflow.com/questions/66245096

QUESTION

clang++ always generates empty profraw coverage reports

Asked 2019-Oct-08 at 07:50

I'm trying to integrate coverage in C++ with clang 6 for the first time and have been following this guide.

I successfully compiled the binary, generated a .profraw file and generated a .profdata file as described in steps 1, 2 and 3a. But when I try to create a line-oriented coverage report as described in 3b, I receive the following message:

...

ANSWER

Answered 2019-Oct-08 at 07:50

Finally solved it. At first I gave the -fprofile-instr-generate -fcoverage-mapping flags as CXXFLAGS, but it didn't work, and so I understood that these were linker flags and moved them to the LINKFLAGS (which resulted in this frustrated post). Apparently, these flags need to appear both as compilation and linker flags in order for the whole thing to work. I also tried checking if you can distribute the flags between the compiler and the linker but that didn't succeed.

Source https://stackoverflow.com/questions/57515488

QUESTION

pyenv won't build new python version (hangs)

Asked 2019-May-27 at 10:42

I followed the tutorial from Northwestern to install pyenv and it seems the commands work. But when I run

...

ANSWER

Answered 2019-Apr-16 at 23:05

It seems there is some bug. If I hit ctrl-C (once!) it starts building, and successfully works. Will submit bug report.

Source https://stackoverflow.com/questions/55696838

QUESTION

Clang does not generate profraw file when linking manually

Asked 2019-May-13 at 22:04

I am trying out the profiling functionality of clang using llvm-cov and llvm-profdata. I have everything setup with CMake, but it doesn't generate the default.profraw as expected. I'v tried the steps manually and discovered that clang does not generate the default.profraw file in case I split the steps between generating the object files and compiling the executable.

For example, The following works:

...

ANSWER

Answered 2019-May-13 at 22:04

I've found out that in the second case, the -fprofile-instr-generate -fcoverage-mapping options should also be specified in the linking call to clang++:

Source https://stackoverflow.com/questions/56112019

QUESTION

Writing Python script to automate llvm code coverage test

Asked 2019-Feb-04 at 21:45

It's my first day coding in Python, and I am having a rough time with some automation. I have a program (./main) that takes in .txt files via input redirection ("./main < 1.txt"). I need to run it with 1000 different txt files (1.txt to 1000.txt) and use llvm to output merged code coverage data to a file coverage.txt. In bash, the following commands are successful for two files:

...

ANSWER

Answered 2019-Feb-04 at 20:02

If you use this approach, you could see what (if anything) went wrong in the stdout and stderr.

Source https://stackoverflow.com/questions/54523483

QUESTION

Error building LLVM on Windows - LNK1104

Asked 2018-Oct-29 at 16:45

I'm trying to build LLVM-5.0.1 and have had a few issues.

Here are the steps taken to get where I am.

Download the source and extract to a folder.
Open cmd and move to the folder.
Run cmake "C:\Users\Michael\Desktop\llvm-5.0.1.src" -DCMAKE_INSTALL_PREFIX="C:\Program Files\llvm-5.0.1" -DLLVM_BUILD_LLVM_DYLIB=True -DLLVM_LINK_LLVM_DYLIB=True
Run cmake --build .

During the last command it seems to compile parts successfully but towards the end a lot of errors occur as a file isn't found (LLVM.lib). I've checked and the file doesn't exist in the source that I have.

...

ANSWER

Answered 2018-Jan-10 at 19:48

Sadly, it seems that building LLVM for Visual Studio with -DLLVM_BUILD_LLVM_DYLIB=True -DLLVM_LINK_LLVM_DYLIB=True is not all that well supported.

See the following thread on the LLVM mailing list, from June 9th 2017:
[llvm-dev] Cannot build Clang/LLVM on Windows with LLVM_BUILD_LLVM_DYLIB.

TL;DR:

It's unsupported on MS toolchain. It's too hard to make LLVM headers and libs DLL-ready.

Source https://stackoverflow.com/questions/48141263

QUESTION

How to understand output of "llvm-profdata show"

Asked 2018-Apr-28 at 21:48

I got some profiling data (code.profdata) for my process using clang-3.8 build/link option:

...

ANSWER

Answered 2018-Apr-28 at 21:48

I was missing one step.
LLVM toolchain provides another tool - llvm-cov Output of llvm-profdata merge needs to be passed to llvm-cov to link the function counter data to source code, like so:

Source https://stackoverflow.com/questions/49967993

QUESTION

PGO: Why is XCode generating an empty .profdata file?

Asked 2017-Jan-25 at 20:47

I'm trying to use profile-guided optimization in XCode 8.

I've followed the instructions here. I made sure to terminate my app using the stop button in XCode, as describe in the document.

I verified that the compile and link commands included the -fprofile-instr-generate argument.

The process successfully generated a .profdata file, but the file is only 1064 bytes, which seems very small considering that my program executed tens, or hundreds of thousands of function calls during the profile generation. Running "xcrun -sdk iphoneos llvm-profdata show " yields this output:

...

ANSWER

Answered 2017-Jan-25 at 20:47

When generating an optimization profile, it's important to exit your application in a certain way.

Despite Apple documentation to the contrary, I've observed that exiting the application by pressing the "Stop" button in XCode does not generate a valid profile--instead, it generates a 1064 byte profile with zero functions.

I've learned that exiting the application by calling exit(0) or by terminating the app through the iOS interface (in iOS 10: double tap the home button, swipe up) does correctly generate a profile. In my case, the correctly generated profile is 34 megabytes.

Source https://stackoverflow.com/questions/41839410

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install llvm-prof

You can download it from GitHub.

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