perf tools: Support 'srccode' output
When looking at PT or brstackinsn traces with 'perf script' it can be
very useful to see the source code. This adds a simple facility to print
them with 'perf script', if the information is available through dwarf
% perf record ...
% perf script -F insn,ip,sym,srccode
...
4004c6 main
5 for (i = 0; i < 10000000; i++)
4004cd main
5 for (i = 0; i < 10000000; i++)
4004c6 main
5 for (i = 0; i < 10000000; i++)
4004cd main
5 for (i = 0; i < 10000000; i++)
4004cd main
5 for (i = 0; i < 10000000; i++)
4004cd main
5 for (i = 0; i < 10000000; i++)
4004cd main
5 for (i = 0; i < 10000000; i++)
4004cd main
5 for (i = 0; i < 10000000; i++)
4004b3 main
6 v++;
% perf record -b ...
% perf script -F insn,ip,sym,srccode,brstackinsn
...
main+22:
0000000000400543 insn: e8 ca ff ff ff # PRED
|18 f1();
f1:
0000000000400512 insn: 55
|10 {
0000000000400513 insn: 48 89 e5
0000000000400516 insn: b8 00 00 00 00
|11 f2();
000000000040051b insn: e8 d6 ff ff ff # PRED
f2:
00000000004004f6 insn: 55
|5 {
00000000004004f7 insn: 48 89 e5
00000000004004fa insn: 8b 05 2c 0b 20 00
|6 c = a / b;
0000000000400500 insn: 8b 0d 2a 0b 20 00
0000000000400506 insn: 99
0000000000400507 insn: f7 f9
0000000000400509 insn: 89 05 29 0b 20 00
000000000040050f insn: 90
|7 }
0000000000400510 insn: 5d
0000000000400511 insn: c3 # PRED
f1+14:
0000000000400520 insn: b8 00 00 00 00
|12 f2();
0000000000400525 insn: e8 cc ff ff ff # PRED
f2:
00000000004004f6 insn: 55
|5 {
00000000004004f7 insn: 48 89 e5
00000000004004fa insn: 8b 05 2c 0b 20 00
|6 c = a / b;
Not supported for callchains currently, would need some layout changes
there.
Committer notes:
Fixed the build on Alpine Linux (3.4 .. 3.8) by addressing this
warning:
In file included from util/srccode.c:19:0:
/usr/include/sys/fcntl.h:1:2: error: #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h> [-Werror=cpp]
#warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h>
^~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20181204001848.24769-1-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen
Arnaldo Carvalho de Melo
parent
42da438c1b
commit
dd2e18e9ac
12 changed files with 339 additions and 3 deletions
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@ -117,7 +117,7 @@ OPTIONS
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Comma separated list of fields to print. Options are:
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comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
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srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output, brstackinsn,
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brstackoff, callindent, insn, insnlen, synth, phys_addr, metric, misc.
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brstackoff, callindent, insn, insnlen, synth, phys_addr, metric, misc, srccode.
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Field list can be prepended with the type, trace, sw or hw,
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to indicate to which event type the field list applies.
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e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace
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@ -96,6 +96,7 @@ enum perf_output_field {
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PERF_OUTPUT_UREGS = 1U << 27,
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PERF_OUTPUT_METRIC = 1U << 28,
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PERF_OUTPUT_MISC = 1U << 29,
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PERF_OUTPUT_SRCCODE = 1U << 30,
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};
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struct output_option {
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@ -132,6 +133,7 @@ struct output_option {
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{.str = "phys_addr", .field = PERF_OUTPUT_PHYS_ADDR},
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{.str = "metric", .field = PERF_OUTPUT_METRIC},
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{.str = "misc", .field = PERF_OUTPUT_MISC},
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{.str = "srccode", .field = PERF_OUTPUT_SRCCODE},
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};
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enum {
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@ -424,7 +426,7 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel,
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pr_err("Display of DSO requested but no address to convert.\n");
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return -EINVAL;
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}
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if (PRINT_FIELD(SRCLINE) && !PRINT_FIELD(IP)) {
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if ((PRINT_FIELD(SRCLINE) || PRINT_FIELD(SRCCODE)) && !PRINT_FIELD(IP)) {
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pr_err("Display of source line number requested but sample IP is not\n"
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"selected. Hence, no address to lookup the source line number.\n");
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return -EINVAL;
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@ -907,6 +909,22 @@ static int grab_bb(u8 *buffer, u64 start, u64 end,
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return len;
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}
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static int print_srccode(struct thread *thread, u8 cpumode, uint64_t addr)
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{
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struct addr_location al;
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int ret = 0;
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memset(&al, 0, sizeof(al));
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thread__find_map(thread, cpumode, addr, &al);
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if (!al.map)
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return 0;
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ret = map__fprintf_srccode(al.map, al.addr, stdout,
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&thread->srccode_state);
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if (ret)
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ret += printf("\n");
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return ret;
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}
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static int ip__fprintf_jump(uint64_t ip, struct branch_entry *en,
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struct perf_insn *x, u8 *inbuf, int len,
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int insn, FILE *fp, int *total_cycles)
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@ -998,6 +1016,8 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
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x.cpumode, x.cpu, &lastsym, attr, fp);
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printed += ip__fprintf_jump(br->entries[nr - 1].from, &br->entries[nr - 1],
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&x, buffer, len, 0, fp, &total_cycles);
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if (PRINT_FIELD(SRCCODE))
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printed += print_srccode(thread, x.cpumode, br->entries[nr - 1].from);
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}
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/* Print all blocks */
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@ -1027,12 +1047,16 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
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if (ip == end) {
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printed += ip__fprintf_jump(ip, &br->entries[i], &x, buffer + off, len - off, insn, fp,
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&total_cycles);
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if (PRINT_FIELD(SRCCODE))
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printed += print_srccode(thread, x.cpumode, ip);
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break;
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} else {
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printed += fprintf(fp, "\t%016" PRIx64 "\t%s\n", ip,
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dump_insn(&x, ip, buffer + off, len - off, &ilen));
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if (ilen == 0)
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break;
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if (PRINT_FIELD(SRCCODE))
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print_srccode(thread, x.cpumode, ip);
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insn++;
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}
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}
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@ -1063,6 +1087,8 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
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printed += fprintf(fp, "\t%016" PRIx64 "\t%s\n", sample->ip,
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dump_insn(&x, sample->ip, buffer, len, NULL));
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if (PRINT_FIELD(SRCCODE))
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print_srccode(thread, x.cpumode, sample->ip);
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goto out;
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}
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for (off = 0; off <= end - start; off += ilen) {
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@ -1070,6 +1096,8 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
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dump_insn(&x, start + off, buffer + off, len - off, &ilen));
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if (ilen == 0)
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break;
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if (PRINT_FIELD(SRCCODE))
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print_srccode(thread, x.cpumode, start + off);
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}
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out:
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return printed;
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@ -1252,7 +1280,16 @@ static int perf_sample__fprintf_bts(struct perf_sample *sample,
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printed += map__fprintf_srcline(al->map, al->addr, "\n ", fp);
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printed += perf_sample__fprintf_insn(sample, attr, thread, machine, fp);
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return printed + fprintf(fp, "\n");
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printed += fprintf(fp, "\n");
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if (PRINT_FIELD(SRCCODE)) {
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int ret = map__fprintf_srccode(al->map, al->addr, stdout,
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&thread->srccode_state);
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if (ret) {
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printed += ret;
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printed += printf("\n");
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}
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}
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return printed;
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}
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static struct {
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@ -1792,6 +1829,12 @@ static void process_event(struct perf_script *script,
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fprintf(fp, "%16" PRIx64, sample->phys_addr);
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fprintf(fp, "\n");
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if (PRINT_FIELD(SRCCODE)) {
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if (map__fprintf_srccode(al->map, al->addr, stdout,
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&thread->srccode_state))
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printf("\n");
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}
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if (PRINT_FIELD(METRIC))
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perf_sample__fprint_metric(script, thread, evsel, sample, fp);
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@ -77,6 +77,7 @@ libperf-y += stat-shadow.o
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libperf-y += stat-display.o
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libperf-y += record.o
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libperf-y += srcline.o
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libperf-y += srccode.o
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libperf-y += data.o
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libperf-y += tsc.o
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libperf-y += cloexec.o
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@ -173,6 +173,7 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
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if (!print_oneline)
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printed += fprintf(fp, "\n");
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/* Add srccode here too? */
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if (symbol_conf.bt_stop_list &&
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node->sym &&
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strlist__has_entry(symbol_conf.bt_stop_list,
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@ -19,6 +19,7 @@
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#include "srcline.h"
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#include "namespaces.h"
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#include "unwind.h"
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#include "srccode.h"
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static void __maps__insert(struct maps *maps, struct map *map);
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static void __maps__insert_name(struct maps *maps, struct map *map);
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@ -421,6 +422,54 @@ int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
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return ret;
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}
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int map__fprintf_srccode(struct map *map, u64 addr,
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FILE *fp,
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struct srccode_state *state)
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{
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char *srcfile;
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int ret = 0;
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unsigned line;
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int len;
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char *srccode;
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if (!map || !map->dso)
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return 0;
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srcfile = get_srcline_split(map->dso,
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map__rip_2objdump(map, addr),
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&line);
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if (!srcfile)
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return 0;
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/* Avoid redundant printing */
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if (state &&
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state->srcfile &&
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!strcmp(state->srcfile, srcfile) &&
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state->line == line) {
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free(srcfile);
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return 0;
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}
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srccode = find_sourceline(srcfile, line, &len);
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if (!srccode)
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goto out_free_line;
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ret = fprintf(fp, "|%-8d %.*s", line, len, srccode);
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state->srcfile = srcfile;
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state->line = line;
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return ret;
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out_free_line:
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free(srcfile);
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return ret;
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}
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void srccode_state_free(struct srccode_state *state)
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{
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zfree(&state->srcfile);
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state->line = 0;
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}
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/**
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* map__rip_2objdump - convert symbol start address to objdump address.
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* @map: memory map
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@ -174,6 +174,22 @@ char *map__srcline(struct map *map, u64 addr, struct symbol *sym);
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int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
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FILE *fp);
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struct srccode_state {
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char *srcfile;
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unsigned line;
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};
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static inline void srccode_state_init(struct srccode_state *state)
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{
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state->srcfile = NULL;
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state->line = 0;
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}
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void srccode_state_free(struct srccode_state *state);
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int map__fprintf_srccode(struct map *map, u64 addr,
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FILE *fp, struct srccode_state *state);
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int map__load(struct map *map);
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struct symbol *map__find_symbol(struct map *map, u64 addr);
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struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
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186
tools/perf/util/srccode.c
Normal file
186
tools/perf/util/srccode.c
Normal file
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@ -0,0 +1,186 @@
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/*
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* Manage printing of source lines
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* Copyright (c) 2017, Intel Corporation.
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* Author: Andi Kleen
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include "linux/list.h"
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <assert.h>
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#include <string.h>
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#include "srccode.h"
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#include "debug.h"
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#include "util.h"
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#define MAXSRCCACHE (32*1024*1024)
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#define MAXSRCFILES 64
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#define SRC_HTAB_SZ 64
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struct srcfile {
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struct hlist_node hash_nd;
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struct list_head nd;
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char *fn;
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char **lines;
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char *map;
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unsigned numlines;
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size_t maplen;
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};
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static struct hlist_head srcfile_htab[SRC_HTAB_SZ];
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static LIST_HEAD(srcfile_list);
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static long map_total_sz;
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static int num_srcfiles;
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static unsigned shash(unsigned char *s)
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{
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unsigned h = 0;
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while (*s)
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h = 65599 * h + *s++;
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return h ^ (h >> 16);
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}
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static int countlines(char *map, int maplen)
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{
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int numl;
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char *end = map + maplen;
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char *p = map;
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if (maplen == 0)
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return 0;
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numl = 0;
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while (p < end && (p = memchr(p, '\n', end - p)) != NULL) {
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numl++;
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p++;
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}
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if (p < end)
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numl++;
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return numl;
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}
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static void fill_lines(char **lines, int maxline, char *map, int maplen)
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{
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int l;
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char *end = map + maplen;
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char *p = map;
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if (maplen == 0 || maxline == 0)
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return;
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l = 0;
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lines[l++] = map;
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while (p < end && (p = memchr(p, '\n', end - p)) != NULL) {
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if (l >= maxline)
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return;
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lines[l++] = ++p;
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}
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if (p < end)
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lines[l] = p;
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}
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static void free_srcfile(struct srcfile *sf)
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{
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list_del(&sf->nd);
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hlist_del(&sf->hash_nd);
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map_total_sz -= sf->maplen;
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munmap(sf->map, sf->maplen);
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free(sf->lines);
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free(sf->fn);
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free(sf);
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num_srcfiles--;
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}
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static struct srcfile *find_srcfile(char *fn)
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{
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struct stat st;
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struct srcfile *h;
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int fd;
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unsigned long sz;
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unsigned hval = shash((unsigned char *)fn) % SRC_HTAB_SZ;
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hlist_for_each_entry (h, &srcfile_htab[hval], hash_nd) {
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if (!strcmp(fn, h->fn)) {
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/* Move to front */
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list_del(&h->nd);
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list_add(&h->nd, &srcfile_list);
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return h;
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}
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}
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/* Only prune if there is more than one entry */
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while ((num_srcfiles > MAXSRCFILES || map_total_sz > MAXSRCCACHE) &&
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srcfile_list.next != &srcfile_list) {
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assert(!list_empty(&srcfile_list));
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h = list_entry(srcfile_list.prev, struct srcfile, nd);
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free_srcfile(h);
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}
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fd = open(fn, O_RDONLY);
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if (fd < 0 || fstat(fd, &st) < 0) {
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pr_debug("cannot open source file %s\n", fn);
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return NULL;
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}
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h = malloc(sizeof(struct srcfile));
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if (!h)
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return NULL;
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h->fn = strdup(fn);
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if (!h->fn)
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goto out_h;
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h->maplen = st.st_size;
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sz = (h->maplen + page_size - 1) & ~(page_size - 1);
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h->map = mmap(NULL, sz, PROT_READ, MAP_SHARED, fd, 0);
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close(fd);
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if (h->map == (char *)-1) {
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pr_debug("cannot mmap source file %s\n", fn);
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goto out_fn;
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}
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h->numlines = countlines(h->map, h->maplen);
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h->lines = calloc(h->numlines, sizeof(char *));
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if (!h->lines)
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goto out_map;
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fill_lines(h->lines, h->numlines, h->map, h->maplen);
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list_add(&h->nd, &srcfile_list);
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hlist_add_head(&h->hash_nd, &srcfile_htab[hval]);
|
||||
map_total_sz += h->maplen;
|
||||
num_srcfiles++;
|
||||
return h;
|
||||
|
||||
out_map:
|
||||
munmap(h->map, sz);
|
||||
out_fn:
|
||||
free(h->fn);
|
||||
out_h:
|
||||
free(h);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Result is not 0 terminated */
|
||||
char *find_sourceline(char *fn, unsigned line, int *lenp)
|
||||
{
|
||||
char *l, *p;
|
||||
struct srcfile *sf = find_srcfile(fn);
|
||||
if (!sf)
|
||||
return NULL;
|
||||
line--;
|
||||
if (line >= sf->numlines)
|
||||
return NULL;
|
||||
l = sf->lines[line];
|
||||
if (!l)
|
||||
return NULL;
|
||||
p = memchr(l, '\n', sf->map + sf->maplen - l);
|
||||
*lenp = p - l;
|
||||
return l;
|
||||
}
|
||||
7
tools/perf/util/srccode.h
Normal file
7
tools/perf/util/srccode.h
Normal file
|
|
@ -0,0 +1,7 @@
|
|||
#ifndef SRCCODE_H
|
||||
#define SRCCODE_H 1
|
||||
|
||||
/* Result is not 0 terminated */
|
||||
char *find_sourceline(char *fn, unsigned line, int *lenp);
|
||||
|
||||
#endif
|
||||
|
|
@ -548,6 +548,34 @@ out:
|
|||
return srcline;
|
||||
}
|
||||
|
||||
/* Returns filename and fills in line number in line */
|
||||
char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line)
|
||||
{
|
||||
char *file = NULL;
|
||||
const char *dso_name;
|
||||
|
||||
if (!dso->has_srcline)
|
||||
goto out;
|
||||
|
||||
dso_name = dso__name(dso);
|
||||
if (dso_name == NULL)
|
||||
goto out;
|
||||
|
||||
if (!addr2line(dso_name, addr, &file, line, dso, true, NULL, NULL))
|
||||
goto out;
|
||||
|
||||
dso->a2l_fails = 0;
|
||||
return file;
|
||||
|
||||
out:
|
||||
if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) {
|
||||
dso->has_srcline = 0;
|
||||
dso__free_a2l(dso);
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void free_srcline(char *srcline)
|
||||
{
|
||||
if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0)
|
||||
|
|
|
|||
|
|
@ -16,6 +16,7 @@ char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
|
|||
bool show_sym, bool show_addr, bool unwind_inlines,
|
||||
u64 ip);
|
||||
void free_srcline(char *srcline);
|
||||
char *get_srcline_split(struct dso *dso, u64 addr, unsigned *line);
|
||||
|
||||
/* insert the srcline into the DSO, which will take ownership */
|
||||
void srcline__tree_insert(struct rb_root *tree, u64 addr, char *srcline);
|
||||
|
|
|
|||
|
|
@ -64,6 +64,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
|
|||
RB_CLEAR_NODE(&thread->rb_node);
|
||||
/* Thread holds first ref to nsdata. */
|
||||
thread->nsinfo = nsinfo__new(pid);
|
||||
srccode_state_init(&thread->srccode_state);
|
||||
}
|
||||
|
||||
return thread;
|
||||
|
|
@ -103,6 +104,7 @@ void thread__delete(struct thread *thread)
|
|||
|
||||
unwind__finish_access(thread);
|
||||
nsinfo__zput(thread->nsinfo);
|
||||
srccode_state_free(&thread->srccode_state);
|
||||
|
||||
exit_rwsem(&thread->namespaces_lock);
|
||||
exit_rwsem(&thread->comm_lock);
|
||||
|
|
|
|||
|
|
@ -8,6 +8,7 @@
|
|||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include "symbol.h"
|
||||
#include "map.h"
|
||||
#include <strlist.h>
|
||||
#include <intlist.h>
|
||||
#include "rwsem.h"
|
||||
|
|
@ -38,6 +39,7 @@ struct thread {
|
|||
void *priv;
|
||||
struct thread_stack *ts;
|
||||
struct nsinfo *nsinfo;
|
||||
struct srccode_state srccode_state;
|
||||
#ifdef HAVE_LIBUNWIND_SUPPORT
|
||||
void *addr_space;
|
||||
struct unwind_libunwind_ops *unwind_libunwind_ops;
|
||||
|
|
|
|||
Loading…
Reference in a new issue