Incorrect DWARF section generation

Oct 13, 2025 by wbrum.org 89 views

cmd/cgo/internal/testplugin: TestDWARFSections failures [consistent failure]

The cmd/cgo/internal/testplugin package is a part of the Go programming language's standard library, responsible for testing the functionality of the cgo tool. The TestDWARFSections test is a crucial part of this package, ensuring that the DWARF sections in compiled binaries are correctly generated and processed. However, this test has been consistently failing, indicating a potential issue with the cgo tool or the test itself.

The failure is reported in the TestDWARFSections test, which is a part of the cmd/cgo/internal/testplugin package. The test is designed to verify that the DWARF sections in compiled binaries are correctly generated and processed. However, the test is failing with an exit status of 1, indicating that the test has encountered an error.

The failure is reported in the following log:

=== RUN   TestDWARFSections
(GOPATH=$TMPDIR PWD=$TMPDIR/src/testplugin LD_LIBRARY_PATH=$TMPDIR/src/testplugin /Volumes/Work/s/w/ir/x/w/goroot/bin/go run -gcflags '' ./checkdwarf/main.go plugin2.so plugin2.UnexportedNameReuse )
    plugin_test.go:210: /Volumes/Work/s/w/ir/x/w/goroot/bin/go run -gcflags  ./checkdwarf/main.go plugin2.so plugin2.UnexportedNameReuse: exit status 1
        plugin2.so: no entry with a name ending in "plugin2.UnexportedNameReuse" was found
        exit status 1
--- FAIL: TestDWARFSections (0.50s)

The failure can be broken down into the following components:

TestDWARFSections: This is the test that is failing. The test is designed to verify that the DWARF sections in compiled binaries are correctly generated and processed.
plugin2.so: This is the compiled binary that is being tested. The binary is being run with the go run command, which is used to execute Go programs.
plugin2.UnexportedNameReuse: This is the name of the entry that is being searched for in the compiled binary. The entry is not found, resulting in an exit status of 1.
exit status 1: This is the exit status of the test, indicating that the test has encountered an error.

There are several possible causes of the failure:

Incorrect DWARF section generation: The DWARF sections in the compiled binary may not be correctly generated, resulting in the test failing.
Incorrect DWARF section processing: The DWARF sections in the compiled binary may not be correctly processed, resulting in the test failing.
Test bug: The test itself may contain a bug, resulting in the failure.

To resolve the failure, the following steps can be taken:

Verify DWARF section generation: Verify that the DWARF sections in the compiled binary are correctly generated.
Verify DWARF section processing: Verify that the DWARF sections in the compiled binary are correctly processed.
Fix test bug: If the test itself contains a bug, fix the bug to resolve the failure.

The cmd/cgo/internal/testplugin package is a crucial part of the Go programming language's standard library, responsible for testing the functionality of the cgo tool. The TestDWARFSections test is a part of this package, ensuring that the DWARF sections in compiled binaries are correctly generated and processed. However, this test has been consistently failing, indicating a potential issue with the cgo tool or the test itself. By analyzing the failure and possible causes, the failure can be resolved by verifying DWARF section generation and processing, and fixing any test bugs.

Based on the analysis of the failure, the following recommendations can be made:

Verify DWARF section generation: Verify that the DWARF sections in the compiled binary are correctly generated.
Verify DWARF section processing: Verify that the DWARF sections in the compiled binary are correctly processed.
Fix test bug: If the test itself contains a bug, fix the bug to resolve the failure.

Future work can include:

Investigating DWARF section generation: Investigate the DWARF section generation process to ensure that it is correctly generating the DWARF sections.
Investigating DWARF section processing: Investigate the DWARF section processing process to ensure that it is correctly processing the DWARF sections.
Improving test reliability: Improve the reliability of the test by adding more test cases and verifying that the test is correctly handling different scenarios.

Watchflakes
cmd/cgo/internal/testplugin
cmd/cgo/internal/testplugin: TestDWARFSections failures [consistent failure] - Q&A

A: The TestDWARFSections test is a part of the cmd/cgo/internal/testplugin package, responsible for testing the functionality of the cgo tool. The test is designed to verify that the DWARF sections in compiled binaries are correctly generated and processed.

A: DWARF (Debugging With Attributed Record Formats) is a standard for debugging information in compiled binaries. It provides information about the source code, such as variable names, function names, and line numbers, which can be used to debug the binary.

A: The cgo tool is a part of the Go programming language's standard library, responsible for compiling Go code into C code that can be linked with C libraries. The cgo tool generates DWARF sections in the compiled binary, which are used by the TestDWARFSections test.

A: The cause of the TestDWARFSections failure is not immediately clear. However, based on the analysis of the failure, it is possible that the failure is due to incorrect DWARF section generation or processing.

A: The TestDWARFSections failure can be resolved by verifying DWARF section generation and processing, and fixing any test bugs. This can be done by investigating the DWARF section generation process, investigating the DWARF section processing process, and improving the reliability of the test.

A: The possible causes of the TestDWARFSections failure include:

Incorrect DWARF section generation: The DWARF sections in the compiled binary may not be correctly generated, resulting in the test failing.
Incorrect DWARF section processing: The DWARF sections in the compiled binary may not be correctly processed, resulting in the test failing.
Test bug: The test itself may contain a bug, resulting in the failure.

A: The reliability of the TestDWARFSections test can be improved by adding more test cases and verifying that the test is correctly handling different scenarios. This can be done by:

Adding more test cases: Adding more test cases can help to ensure that the test is correctly handling different scenarios.
Verifying test handling: Verifying that the test is correctly handling different scenarios can help to ensure that the test is reliable.

A: Resolving the TestDWARFSections failure can have several benefits, including:

Improved test reliability: Resolving the failure can help to improve the reliability of the test.
Improved DWARF section generation and processing: Resolving the failure can help to improve the generation and processing of DWARF sections.
Improved cgo tool functionality: Resolving the failure can help to improve the functionality of the cgo tool.

A: The next steps in resolving the TestDWARFSections failure include:

Investigating DWARF section generation: Investigating the DWARF section generation process to ensure that it is correctly generating the DWARF sections.
Investigating DWARF section processing: Investigating the DWARF section processing process to ensure that it is correctly processing the DWARF sections.
Improving test reliability: Improving the reliability of the test by adding more test cases and verifying that the test is correctly handling different scenarios.