When trying to show a percpu symbol without debuginfo, crash fails like
this:
crash> p fcoe_percpu:0
p: gdb request failed: p *(<data variable, no debug info>*)
0xffff88011e2d4900
This is because gdb does not really fail if the type is unknown:
crash> gdb whatis fcoe_percpu
type = <data variable, no debug info>
crash> gdb info variables fcoe_percpu
All variables matching regular expression "fcoe_percpu":
Non-debugging symbols:
0x0000000000014900 fcoe_percpu
Of course, the actual contents cannot be shown in this case, but crash
should at least display the address:
crash> p fcoe_percpu:0
&per_cpu(fcoe_percpu, 0) = $1 = (void *) 0xffff88011e214900
Signed-off-by: Petr Tesarik <ptesarik@xxxxxxx>
[PATCH 4/11] Fix percpu handling for symbols without debuginfo
When trying to show a percpu symbol without debuginfo, crash fails like
this:
crash> p fcoe_percpu:0
p: gdb request failed: p *(<data variable, no debug info>*) 0xffff88011e2d4900
This is because gdb does not really fail if the type is unknown:
crash> gdb whatis fcoe_percpu
type = <data variable, no debug info>
crash> gdb info variables fcoe_percpu
All variables matching regular expression "fcoe_percpu":
Non-debugging symbols:
0x0000000000014900 fcoe_percpu
Of course, the actual contents cannot be shown in this case, but crash should
at least display the address:
crash> p fcoe_percpu:0
&per_cpu(fcoe_percpu, 0) = $1 = (void *) 0xffff88011e214900
Signed-off-by: Petr Tesarik <ptesarik@xxxxxxx>
---
symbols.c | 3 +++
1 file changed, 3 insertions(+)
--- a/symbols.c
+++ b/symbols.c
@@ -6535,6 +6535,9 @@ expr_type_name(const char *expr)
if (p) {
size_t len = strlen(clean_line(p));
+ /* GDB reports unknown types as <...descriptive text...> */
+ if (p[0] == '<' && p[len-1] == '>')
+ return NULL;
return strcpy(GETBUF(len + 1), p);
}
return NULL;
--
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