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bus error on ARM CPUs (i.MX6) with GCC 12.3.0 #1159
Description
I have experienced a 'bus-error' with Yocto-Mickledore (gcc 12.3.0)
I am using the brotli lib with nodejs and when I run a simple compress/decompress example I get this 'bus-error'.
This is a generated example:
const zlib = require('zlib');
const inputString = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.';
const buffer = Buffer.from(inputString, 'utf-8');
// Compress the buffer using Brotli
zlib.brotliCompress(buffer, (err, compressedBuffer) => {
if (err) {
console.error('Error compressing data:', err);
return;
}
// Convert compressed buffer to string
const compressedString = compressedBuffer.toString('base64');
console.log('Compressed string:', compressedString);
// Decompress the compressed buffer to verify
zlib.brotliDecompress(compressedBuffer, (err, decompressedBuffer) => {
if (err) {
console.error('Error decompressing data:', err);
return;
}
// Convert decompressed buffer back to string
const decompressedString = decompressedBuffer.toString('utf-8');
console.log('Decompressed string:', decompressedString);
});
});
I have figured out that if I add a bbappend with CFLAGS += " -Og" the 'libbrotlienc.so.1.0.9' works like a charm again.
Alternatively if I compile it with the GCC 11.2.0 (Yocto-Honister) it also works as expected.
I have also tried newer TAGs and the Git HEAD too, with no luck to getting it to work by using '-O2' as a C flag.
Are there any recommended C flags for this project? Yocto is uses '-O2' by default.
Is this a already known?
Activity
jhofstee commentedon Mar 29, 2025
I think I encountered the same issue. Openembedded version is Scarthgap (gcc 13.3), brottli 1.1.0 on ARM. It is https://github.com/google/brotli/blob/v1.1.0/c/enc/histogram_inc.h#L47 causing the bus error. Adding -fno-strict-aliasing to the CFLAGS solves it.
brotli: disable strict aliasing
zlib: fix pointer alignment
zlib: fix pointer alignment
zlib: fix pointer alignment
jhofstee commentedon Apr 9, 2025
@eustas or @ChHapp this should be fixed by nodejs/node#57727, so this issue can be closed.
nodejs: backport a patch to prevent brotli crashing nodejs
8 remaining items
zlib: fix pointer alignment
zlib: fix pointer alignment
nodejs: backport a patch to prevent brotli crashing nodejs
zlib: fix pointer alignment
zlib: fix pointer alignment
zlib: fix pointer alignment
zlib: fix pointer alignment
zlib: fix pointer alignment
zlib: fix pointer alignment
zlib: fix pointer alignment
nodejs: backport a patch to prevent brotli crashing nodejs
nodejs: backport a patch to prevent brotli crashing nodejs
nodejs: backport a patch to prevent brotli crashing nodejs