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| -rw-r--r-- | gdb/ChangeLog | 4 | ||||
| -rw-r--r-- | gdb/NEWS | 40 |
2 files changed, 44 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 5d7069a..aa74cb9 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,9 @@ 2021-03-24 Luis Machado <luis.machado@linaro.org> + * NEWS: Mention memory tagging changes. + +2021-03-24 Luis Machado <luis.machado@linaro.org> + * printcmd.c (decode_format): Handle the 'm' modifier. (do_examine): Display allocation tags when required/supported. (should_validate_memtags): New function. @@ -3,6 +3,21 @@ *** Changes since GDB 10 +* GDB now supports general memory tagging functionality if the underlying + architecture supports the proper primitives and hooks. Currently this is + enabled only for AArch64 MTE. + + This includes: + + - Additional information when the inferior crashes with a SIGSEGV caused by + a memory tag violation. + + - A new modifier 'm' for the "x" command, which displays allocation tags for a + particular memory range. + + - Display of memory tag mismatches by "print", for addresses and + pointers, if memory tagging is supported by the architecture. + * Building GDB now requires GMP (The GNU Multiple Precision Arithmetic Library). @@ -39,6 +54,12 @@ set debug event-loop show debug event-loop Control the display of debug output about GDB's event loop. +set print memory-tag-violations +show print memory-tag-violations + Control whether to display additional information about memory tag violations + when printing pointers and addresses. Architecture support for memory + tagging is required for this option to have an effect. + maintenance flush symbol-cache maintenance flush register-cache These new commands are equivalent to the already existing commands @@ -50,6 +71,17 @@ maintenance flush dcache maintenance info target-sections Print GDB's internal target sections table. +memory-tag show-logical-tag POINTER + Print the logical tag for POINTER. +memory-tag with-logical-tag POINTER TAG + Print POINTER with logical tag TAG. +memory-tag show-allocation-tag ADDRESS + Print the allocation tag for ADDRESS. +memory-tag set-allocation-tag ADDRESS LENGTH TAGS + Set the allocation tag for [ADDRESS, ADDRESS + LENGTH) to TAGS. +memory-tag check POINTER + Validate that POINTER's logical tag matches the allocation tag. + * Changed commands break [PROBE_MODIFIER] [LOCATION] [thread THREADNUM] @@ -98,6 +130,14 @@ maintenance info sections ARM Symbian arm*-*-symbianelf* +* New remote packets + +qMemTags + Request the remote to send allocation tags for a particular memory range. +QMemTags + Request the remote to store the specified allocation tags to the requested + memory range. + *** Changes in GDB 10 * There are new feature names for ARC targets: "org.gnu.gdb.arc.core" |