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perf symbols: Properly align symbol_conf.priv_size

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If symbol_conf.priv_size is not a multiple of "sizeof(u64)" we'll bus
error on sparc64 in symbol__new because the "struct symbol *" pointer
is computed by adding symbol_conf.priv_size to the memory allocated.

We cannot isolate the fix to symbol__new and symbol__delete since the
private area is computed by subtracting the priv_size value from a
"struct symbol" pointer, so then the private area can still be
potentially unaligned.

So, simply align the symbol_conf.priv_size value in symbol__init()

Cc: Ingo Molnar <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
David S. Miller 2011-03-29 14:18:39 -03:00 • committed by Arnaldo Carvalho de Melo
commit 4d43951756
1 changed files with 2 additions and 0 deletions
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2
tools/perf/util/symbol.c
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@ -2406,6 +2406,8 @@ int symbol__init(void)
if (symbol_conf.initialized)
return 0;
symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64));
elf_version(EV_CURRENT);
if (symbol_conf.sort_by_name)
symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -