On Wed, 11 Feb 2026 at 15:29, Daniel P. Berrangé <[email protected]> wrote: > > The error_report function can include the program name in any > messages it prints. The qemu_log function has no equivalent > behaviour. > > This introduces support for a "program name" in the new > messages API, which will be included by default for all > binaries. > > This change tweaks the output of the error_report function, > adding a space between the program name and the location > info. The qemu_log function will gain the program name. This > can be easily seen with the 'log' trace backend, and how it > is now more closely matching error_report output. > > Before: > > # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish -d > 'trace:qcrypto*' > qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x5584e13937f0 > dir=fish > qcrypto_tls_creds_get_path TLS creds path creds=0x5584e13937f0 > filename=ca-cert.pem path=<none> > qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No such > file or directory > > After: > > # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish -d > 'trace:qcrypto*' > qemu-system-x86_64: qcrypto_tls_creds_x509_load TLS creds x509 load > creds=0x5584e13937f0 dir=fish > qemu-system-x86_64: qcrypto_tls_creds_get_path TLS creds path > creds=0x5584e13937f0 filename=ca-cert.pem path=<none> > qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No such > file or directory
On the other hand if you're using the logs for debugging then you now have an extra big pointless prefix on them that you have to turn off. Especially if you're logging to a file that's a lot of extra garbage in the output. I'm not really looking forward to now having to give QEMU an extra long and unwieldy command line argument every time I want to do debug or tracepoint logging. Why do we care about the qemu_log output matching the error-report output? The logs are expected to be quite frequent, to only be there if you've explicitly turned them on, and to be usually directed to a log file. The error reporting is more likely to be infrequent, to be on stdout, and to be important/fatal things. -- PMM
