perf annotate: Split allocation of annotated_source struct

So that we can allocate just the notes->src->cyc_hist, that, unlike
notes->src->histograms, is not per event, and in paths where we
need to lazily allocate notes->src->cyc_hist we don't have the
number of events handy to also allocate ->histograms.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-tsx7dhxzpi0criyx0sio3pz3@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent f40dd6d1
......@@ -701,13 +701,17 @@ int symbol__alloc_hist(struct symbol *sym)
sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(struct sym_hist_entry));
/* Check for overflow in zalloc argument */
if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
/ symbol_conf.nr_events)
if (sizeof_sym_hist > SIZE_MAX / symbol_conf.nr_events)
return -1;
notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
notes->src = zalloc(sizeof(*notes->src));
if (notes->src == NULL)
return -1;
notes->src->histograms = calloc(symbol_conf.nr_events, sizeof_sym_hist);
if (notes->src->histograms == NULL) {
zfree(&notes->src);
return -1;
}
notes->src->sizeof_sym_hist = sizeof_sym_hist;
notes->src->nr_histograms = symbol_conf.nr_events;
INIT_LIST_HEAD(&notes->src->source);
......
......@@ -201,7 +201,7 @@ struct cyc_hist {
/** struct annotated_source - symbols with hits have this attached as in sannotation
*
* @histogram: Array of addr hit histograms per event being monitored
* @histograms: Array of addr hit histograms per event being monitored
* @lines: If 'print_lines' is specified, per source code line percentages
* @source: source parsed from a disassembler like objdump -dS
* @cyc_hist: Average cycles per basic block
......@@ -217,7 +217,7 @@ struct annotated_source {
int nr_histograms;
size_t sizeof_sym_hist;
struct cyc_hist *cycles_hist;
struct sym_hist histograms[0];
struct sym_hist *histograms;
};
struct annotation {
......@@ -269,7 +269,7 @@ void annotation__init_column_widths(struct annotation *notes, struct symbol *sym
static inline struct sym_hist *annotation__histogram(struct annotation *notes, int idx)
{
return (((void *)&notes->src->histograms) +
return (((void *)notes->src->histograms) +
(notes->src->sizeof_sym_hist * idx));
}
......
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