Release Notes for DTrace 2.0.0 1.8

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Elena Zannoni edited this page Feb 4, 2022 · 1 revision

2.0.0-1.8 (Oct 19th, 2021)

Eighth errata of the standalone userspace implementation.

This is a pre-release with limited functionality.

New features:

The htonl(), htonll(), htons(), ntohl(), ntohll(), and ntohs() subroutines have been implemented.
String comparison has been implemented.
The strchr(), strrchr(), index(), rindex(), strstr(), and lltostr() subroutines have been implemented.
Support has been added to be able to resolve symbols in compressed kernel modules.
Speculative tracing has been implemented. Full support for the speculate(), commit(), and discard() actions is available, as is support for the speculaton() subroutine.
It is now possible to run dtrace under valgrind.

Bugfixes:

Symbol resolution for loadable modules was broken. This has been corrected.

Internal changes:

Support has been added for the endianness conversion BPF instruction.
All uses of perf_event_open() now specify the PERF_FLAG_FD_CLOEXEC flag.

Known problems:

String sizes greater than 128 characters may pose problems with some string operations due to BPF verifier limitations.