diff options
author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-04-19 18:38:33 -0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-04-24 13:43:26 -0300 |
commit | 56e2e05644a9494e8ba3165182dcdf43d40cc6a2 (patch) | |
tree | 3e795cfb8e9a01c3350fc1266a88099abd004bc2 /tools/perf/util/callchain.c | |
parent | 611f0afee0e87eb6d184e7f58aa20d18d291d169 (diff) |
perf callchain: Move callchain specific routines from util.[ch]
Where they belong, no point in leaving those in the generic "util"
files.
Link: http://lkml.kernel.org/n/tip-ljx3iiip1hlfa7a7apjem7ph@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/callchain.c')
-rw-r--r-- | tools/perf/util/callchain.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index 0096d45a06b3..81fc29ac798f 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -24,6 +24,21 @@ #include "machine.h" #include "callchain.h" +#define CALLCHAIN_PARAM_DEFAULT \ + .mode = CHAIN_GRAPH_ABS, \ + .min_percent = 0.5, \ + .order = ORDER_CALLEE, \ + .key = CCKEY_FUNCTION, \ + .value = CCVAL_PERCENT, \ + +struct callchain_param callchain_param = { + CALLCHAIN_PARAM_DEFAULT +}; + +struct callchain_param callchain_param_default = { + CALLCHAIN_PARAM_DEFAULT +}; + __thread struct callchain_cursor callchain_cursor; int parse_callchain_record_opt(const char *arg, struct callchain_param *param) @@ -113,6 +128,32 @@ static int parse_callchain_value(const char *value) return -1; } +static int get_stack_size(const char *str, unsigned long *_size) +{ + char *endptr; + unsigned long size; + unsigned long max_size = round_down(USHRT_MAX, sizeof(u64)); + + size = strtoul(str, &endptr, 0); + + do { + if (*endptr) + break; + + size = round_up(size, sizeof(u64)); + if (!size || size > max_size) + break; + + *_size = size; + return 0; + + } while (0); + + pr_err("callchain: Incorrect stack dump size (max %ld): %s\n", + max_size, str); + return -1; +} + static int __parse_callchain_report_opt(const char *arg, bool allow_record_opt) { @@ -196,6 +237,68 @@ int parse_callchain_top_opt(const char *arg) return __parse_callchain_report_opt(arg, true); } +int parse_callchain_record(const char *arg, struct callchain_param *param) +{ + char *tok, *name, *saveptr = NULL; + char *buf; + int ret = -1; + + /* We need buffer that we know we can write to. */ + buf = malloc(strlen(arg) + 1); + if (!buf) + return -ENOMEM; + + strcpy(buf, arg); + + tok = strtok_r((char *)buf, ",", &saveptr); + name = tok ? : (char *)buf; + + do { + /* Framepointer style */ + if (!strncmp(name, "fp", sizeof("fp"))) { + if (!strtok_r(NULL, ",", &saveptr)) { + param->record_mode = CALLCHAIN_FP; + ret = 0; + } else + pr_err("callchain: No more arguments " + "needed for --call-graph fp\n"); + break; + + /* Dwarf style */ + } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) { + const unsigned long default_stack_dump_size = 8192; + + ret = 0; + param->record_mode = CALLCHAIN_DWARF; + param->dump_size = default_stack_dump_size; + + tok = strtok_r(NULL, ",", &saveptr); + if (tok) { + unsigned long size = 0; + + ret = get_stack_size(tok, &size); + param->dump_size = size; + } + } else if (!strncmp(name, "lbr", sizeof("lbr"))) { + if (!strtok_r(NULL, ",", &saveptr)) { + param->record_mode = CALLCHAIN_LBR; + ret = 0; + } else + pr_err("callchain: No more arguments " + "needed for --call-graph lbr\n"); + break; + } else { + pr_err("callchain: Unknown --call-graph option " + "value: %s\n", arg); + break; + } + + } while (0); + + free(buf); + return ret; +} + int perf_callchain_config(const char *var, const char *value) { char *endptr; |