From 3f51972c599cf95702819bd06a7a5412c523ebfe Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Fri, 24 Apr 2015 18:47:46 +0900 Subject: [PATCH] perf tools: Add strfilter__string to recover rules string Add strfilter__string to recover rules string from strfilter. This will be good for debugging. Signed-off-by: Masami Hiramatsu Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20150424094746.23967.52434.stgit@localhost.localdomain Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/strfilter.c | 67 +++++++++++++++++++++++++++++++++++++ tools/perf/util/strfilter.h | 9 +++++ 2 files changed, 76 insertions(+) diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c index f3429cd16b1e..bcae659b6546 100644 --- a/tools/perf/util/strfilter.c +++ b/tools/perf/util/strfilter.c @@ -237,3 +237,70 @@ bool strfilter__compare(struct strfilter *filter, const char *str) return false; return strfilter_node__compare(filter->root, str); } + +static int strfilter_node__sprint(struct strfilter_node *node, char *buf); + +/* sprint node in parenthesis if needed */ +static int strfilter_node__sprint_pt(struct strfilter_node *node, char *buf) +{ + int len; + int pt = node->r ? 2 : 0; /* don't need to check node->l */ + + if (buf && pt) + *buf++ = '('; + len = strfilter_node__sprint(node, buf); + if (len < 0) + return len; + if (buf && pt) + *(buf + len) = ')'; + return len + pt; +} + +static int strfilter_node__sprint(struct strfilter_node *node, char *buf) +{ + int len = 0, rlen; + + if (!node || !node->p) + return -EINVAL; + + switch (*node->p) { + case '|': + case '&': + len = strfilter_node__sprint_pt(node->l, buf); + if (len < 0) + return len; + case '!': + if (buf) { + *(buf + len++) = *node->p; + buf += len; + } else + len++; + rlen = strfilter_node__sprint_pt(node->r, buf); + if (rlen < 0) + return rlen; + len += rlen; + break; + default: + len = strlen(node->p); + if (buf) + strcpy(buf, node->p); + } + + return len; +} + +char *strfilter__string(struct strfilter *filter) +{ + int len; + char *ret = NULL; + + len = strfilter_node__sprint(filter->root, NULL); + if (len < 0) + return NULL; + + ret = malloc(len + 1); + if (ret) + strfilter_node__sprint(filter->root, ret); + + return ret; +} diff --git a/tools/perf/util/strfilter.h b/tools/perf/util/strfilter.h index d007cdc2c68b..cff5eda88728 100644 --- a/tools/perf/util/strfilter.h +++ b/tools/perf/util/strfilter.h @@ -71,4 +71,13 @@ bool strfilter__compare(struct strfilter *filter, const char *str); */ void strfilter__delete(struct strfilter *filter); +/** + * strfilter__string - Reconstruct a rule string from filter + * @filter: String filter to reconstruct + * + * Reconstruct a rule string from @filter. This will be good for + * debug messages. Note that returning string must be freed afterward. + */ +char *strfilter__string(struct strfilter *filter); + #endif -- GitLab