[doc/tracepoint] Change *$esp@300 to *(unsigned char *)$esp@300.

Hui Zhu
2011-09-16T07:55:52Z

Hi,

I found that if want collect stack in tracepoint action like doc said
will got error.

collect $rsp@512
Left operand of `@' must be an object in memory.

But change to:
collect *(unsigned char *)$rsp@512

Will fix it.

So I make a patch for doc.

Please help me review it.

Thanks,
Hui

2011-09-16 Hui Zhu <teawater@gmail.com>

* gdb.texinfo (Tracepoint Restrictions): Change *$esp@300
to *(unsigned char *)$esp@300.
---
doc/gdb.texinfo | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/doc/gdb.texinfo
+++ b/doc/gdb.texinfo
@@ -10627,7 +10627,7 @@ by @code{ptr}.
@item
It is not possible to collect a complete stack backtrace at a
tracepoint. Instead, you may collect the registers and a few hundred
-bytes from the stack pointer with something like @code{*$esp@@300}
+bytes from the stack pointer with something like @code{*(unsigned
char *)$esp@@300}
(adjust to use the name of the actual stack pointer register on your
target architecture, and the amount of stack you wish to capture).
Then the @code{backtrace} command will show a partial backtrace when