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SubjectRe: [PATCH] perf report: don't crash on invalid maps in `-g srcline` mode
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On 05/09/2017 03:50 PM, Milian Wolff wrote:
> diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
> index 9ab68682c6d0..295f0846fd84 100644
> --- a/tools/perf/util/callchain.c
> +++ b/tools/perf/util/callchain.c
> @@ -642,13 +642,22 @@ static enum match_result match_chain_strings(const char *left,
> static enum match_result match_chain_srcline(struct callchain_cursor_node *node,
> struct callchain_list *cnode)
> {
> - char *left = get_srcline(cnode->ms.map->dso,
> - map__rip_2objdump(cnode->ms.map, cnode->ip),
> - cnode->ms.sym, true, false);
> - char *right = get_srcline(node->map->dso,
> - map__rip_2objdump(node->map, node->ip),
> - node->sym, true, false);
> - enum match_result ret = match_chain_strings(left, right);
> + char *left = NULL;
> + char *right = NULL;

nit: the above two initializations are unnecessary.

> + enum match_result ret = MATCH_ERROR;
> +
> + if (!node->map || !cnode->ms.map)
> + return ret;
> +
> + left = get_srcline(cnode->ms.map->dso,
> + map__rip_2objdump(cnode->ms.map, cnode->ip),
> + cnode->ms.sym, true, false);
> +
> + right = get_srcline(node->map->dso,
> + map__rip_2objdump(node->map, node->ip),
> + node->sym, true, false);
> +
> + ret = match_chain_strings(left, right);
>
> free_srcline(left);
> free_srcline(right);

PC

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