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Document possible unreliability of '$_ret'

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gdb/doc/ChangeLog:
2016-03-15  Pedro Alves  <palves@redhat.com>
	    Andreas Arnez  <arnez@linux.vnet.ibm.com>
	    Marcin Kościelnicki  <koriakin@0x04.net>

	* gdb.texinfo (Tracepoint Actions): Document possible
	unreliability of '$_ret'.
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Pedro Alves
2016-03-15 11:08:52 +00:00
parent 4bde3cdd70
commit 45fa2529db
2 changed files with 14 additions and 0 deletions
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gdb/doc/ChangeLog
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@ -1,3 +1,10 @@
2016-03-15 Pedro Alves <palves@redhat.com>
Andreas Arnez <arnez@linux.vnet.ibm.com>
Marcin Kościelnicki <koriakin@0x04.net>
* gdb.texinfo (Tracepoint Actions): Document possible
unreliability of '$_ret'.
2016-03-11 Andrew Burgess <andrew.burgess@embecosm.com> 2016-03-11 Andrew Burgess <andrew.burgess@embecosm.com>
* gdb.texinfo (Symbols): Document new 'maint info line-table' * gdb.texinfo (Symbols): Document new 'maint info line-table'

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gdb/doc/gdb.texinfo
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@ -12878,6 +12878,13 @@ Collect all local variables.
Collect the return address. This is helpful if you want to see more Collect the return address. This is helpful if you want to see more
of a backtrace. of a backtrace.
@emph{Note:} The return address location can not always be reliability
determined up front, and the wrong address / registers may end up
collected instead. On some architectures the reliability is higher
for tracepoints at function entry, while on others it's the opposite.
When this happens, backtracing will stop because the return address is
found unavailable (unless another collect rule happened to match it).
@item $_probe_argc @item $_probe_argc
Collects the number of arguments from the static probe at which the Collects the number of arguments from the static probe at which the
tracepoint is located. tracepoint is located.