[U-Boot] [PATCH v2 11/21] Add proftool to decode profile data
Simon Glass
sjg at chromium.org
Tue Jun 11 20:14:43 CEST 2013
This tool provides the facility to decode U-Boot trace data and write out
a text file in Linux ftrace format for use with pytimechart.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v2: None
Makefile | 3 +-
tools/.gitignore | 1 +
tools/Makefile | 6 +
tools/proftool.c | 611 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 620 insertions(+), 1 deletion(-)
create mode 100644 tools/proftool.c
diff --git a/Makefile b/Makefile
index ef154aa..29af07a 100644
--- a/Makefile
+++ b/Makefile
@@ -824,7 +824,8 @@ clean:
$(obj)tools/mk{smdk5250,}spl \
$(obj)tools/mxsboot \
$(obj)tools/ncb $(obj)tools/ubsha1 \
- $(obj)tools/kernel-doc/docproc
+ $(obj)tools/kernel-doc/docproc \
+ $(obj)tools/proftool
@rm -f $(obj)board/cray/L1/{bootscript.c,bootscript.image} \
$(obj)board/matrix_vision/*/bootscript.img \
$(obj)board/voiceblue/eeprom \
diff --git a/tools/.gitignore b/tools/.gitignore
index 9bce719..a7fee26 100644
--- a/tools/.gitignore
+++ b/tools/.gitignore
@@ -9,6 +9,7 @@
/mxsboot
/ncb
/ncp
+/proftool
/ubsha1
/xway-swap-bytes
/*.exe
diff --git a/tools/Makefile b/tools/Makefile
index 26eb500..569dc77 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -74,6 +74,7 @@ BIN_FILES-$(CONFIG_MX28) += mxsboot$(SFX)
BIN_FILES-$(CONFIG_NETCONSOLE) += ncb$(SFX)
BIN_FILES-$(CONFIG_SHA1_CHECK_UB_IMG) += ubsha1$(SFX)
BIN_FILES-$(CONFIG_KIRKWOOD) += kwboot$(SFX)
+BIN_FILES-y += proftool(SFX)
# Source files which exist outside the tools directory
EXT_OBJ_FILES-$(CONFIG_BUILD_ENVCRC) += common/env_embedded.o
@@ -87,6 +88,7 @@ EXT_OBJ_FILES-y += lib/sha1.o
OBJ_FILES-$(CONFIG_LCD_LOGO) += bmp_logo.o
OBJ_FILES-$(CONFIG_VIDEO_LOGO) += bmp_logo.o
NOPED_OBJ_FILES-y += default_image.o
+NOPED_OBJ_FILES-y += proftool.o
OBJ_FILES-$(CONFIG_BUILD_ENVCRC) += envcrc.o
NOPED_OBJ_FILES-y += fit_image.o
OBJ_FILES-$(CONFIG_CMD_NET) += gen_eth_addr.o
@@ -187,6 +189,10 @@ $(obj)bmp_logo$(SFX): $(obj)bmp_logo.o
$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
$(HOSTSTRIP) $@
+$(obj)proftool(SFX): $(obj)proftool.o
+ $(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
+ $(HOSTSTRIP) $@
+
$(obj)envcrc$(SFX): $(obj)crc32.o $(obj)env_embedded.o $(obj)envcrc.o $(obj)sha1.o
$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
diff --git a/tools/proftool.c b/tools/proftool.c
new file mode 100644
index 0000000..a48ed28
--- /dev/null
+++ b/tools/proftool.c
@@ -0,0 +1,611 @@
+/*
+ * Copyright (c) 2013 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* Decode and dump U-Boot profiling information */
+
+#include <assert.h>
+#include <ctype.h>
+#include <limits.h>
+#include <regex.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+
+#include <compiler.h>
+#include <trace.h>
+
+#define MAX_LINE_LEN 500
+
+enum {
+ FUNCF_TRACE = 1 << 0, /* Include this function in trace */
+};
+
+struct func_info {
+ unsigned long offset;
+ const char *name;
+ unsigned long code_size;
+ unsigned long call_count;
+ unsigned flags;
+ /* the section this function is in */
+ struct objsection_info *objsection;
+};
+
+enum trace_line_type {
+ TRACE_LINE_INCLUDE,
+ TRACE_LINE_EXCLUDE,
+};
+
+struct trace_configline_info {
+ struct trace_configline_info *next;
+ enum trace_line_type type;
+ const char *name; /* identifier name / wildcard */
+ regex_t regex; /* Regex to use if name starts with / */
+};
+
+/* The contents of the trace config file */
+struct trace_configline_info *trace_config_head;
+
+struct func_info *func_list;
+int func_count;
+struct trace_call *call_list;
+int call_count;
+int verbose; /* Verbosity level 0=none, 1=warn, 2=notice, 3=info, 4=debug */
+unsigned long text_offset; /* text address of first function */
+
+static void outf(int level, const char *fmt, ...)
+ __attribute__ ((format (__printf__, 2, 3)));
+#define error(fmt, b...) outf(0, fmt, ##b)
+#define warn(fmt, b...) outf(1, fmt, ##b)
+#define notice(fmt, b...) outf(2, fmt, ##b)
+#define info(fmt, b...) outf(3, fmt, ##b)
+#define debug(fmt, b...) outf(4, fmt, ##b)
+
+
+static void outf(int level, const char *fmt, ...)
+{
+ if (verbose >= level) {
+ va_list args;
+
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ va_end(args);
+ }
+}
+
+static void usage(void)
+{
+ fprintf(stderr,
+ "Usage: proftool -cds -v3 <cmd> <profdata>\n"
+ "\n"
+ "Commands\n"
+ " dump-ftrace\t\tDump out textual data in ftrace format\n"
+ "\n"
+ "Options:\n"
+ " -m <map>\tSpecify Systen.map file\n"
+ " -t <trace>\tSpecific trace data file (from U-Boot)\n"
+ " -v <0-4>\tSpecify verbosity\n");
+ exit(EXIT_FAILURE);
+}
+
+static int h_cmp_offset(const void *v1, const void *v2)
+{
+ const struct func_info *f1 = v1, *f2 = v2;
+
+ return (f1->offset / FUNC_SITE_SIZE) - (f2->offset / FUNC_SITE_SIZE);
+}
+
+static int read_system_map(FILE *fin)
+{
+ unsigned long offset, start = 0;
+ struct func_info *func;
+ char buff[MAX_LINE_LEN];
+ char symtype;
+ char symname[MAX_LINE_LEN + 1];
+ int linenum;
+ int alloced;
+
+ for (linenum = 1, alloced = func_count = 0;; linenum++) {
+ int fields = 0;
+
+ if (fgets(buff, sizeof(buff), fin))
+ fields = sscanf(buff, "%lx %c %100s\n", &offset,
+ &symtype, symname);
+ if (fields == 2) {
+ continue;
+ } else if (feof(fin)) {
+ break;
+ } else if (fields < 2) {
+ error("Map file line %d: invalid format\n", linenum);
+ return 1;
+ }
+
+ /* Must be a text symbol */
+ symtype = tolower(symtype);
+ if (symtype != 't' && symtype != 'w')
+ continue;
+
+ if (func_count == alloced) {
+ alloced += 256;
+ func_list = realloc(func_list,
+ sizeof(struct func_info) * alloced);
+ assert(func_list);
+ }
+ if (!func_count)
+ start = offset;
+
+ func = &func_list[func_count++];
+ memset(func, '\0', sizeof(*func));
+ func->offset = offset - start;
+ func->name = strdup(symname);
+ func->flags = FUNCF_TRACE; /* trace by default */
+
+ /* Update previous function's code size */
+ if (func_count > 1)
+ func[-1].code_size = func->offset - func[-1].offset;
+ }
+ notice("%d functions found in map file\n", func_count);
+ text_offset = start;
+ return 0;
+}
+
+static int read_data(FILE *fin, void *buff, int size)
+{
+ int err;
+
+ err = fread(buff, 1, size, fin);
+ if (!err)
+ return 1;
+ if (err != size) {
+ error("Cannot read profile file at pos %ld\n", ftell(fin));
+ return -1;
+ }
+ return 0;
+}
+
+static struct func_info *find_func_by_offset(uint32_t offset)
+{
+ struct func_info key, *found;
+
+ key.offset = offset;
+ found = bsearch(&key, func_list, func_count, sizeof(struct func_info),
+ h_cmp_offset);
+
+ return found;
+}
+
+/* This finds the function which contains the given offset */
+static struct func_info *find_caller_by_offset(uint32_t offset)
+{
+ int low; /* least function that could be a match */
+ int high; /* greated function that could be a match */
+ struct func_info key;
+
+ low = 0;
+ high = func_count - 1;
+ key.offset = offset;
+ while (high > low + 1) {
+ int mid = (low + high) / 2;
+ int result;
+
+ result = h_cmp_offset(&key, &func_list[mid]);
+ if (result > 0)
+ low = mid;
+ else if (result < 0)
+ high = mid;
+ else
+ return &func_list[mid];
+ }
+
+ return low >= 0 ? &func_list[low] : NULL;
+}
+
+static int read_calls(FILE *fin, int count)
+{
+ struct trace_call *call_data;
+ int i;
+
+ notice("call count: %d\n", count);
+ call_list = (struct trace_call *)calloc(count, sizeof(*call_data));
+ if (!call_list) {
+ error("Cannot allocate call_list\n");
+ return -1;
+ }
+ call_count = count;
+
+ call_data = call_list;
+ for (i = 0; i < count; i++, call_data++) {
+ if (read_data(fin, call_data, sizeof(*call_data)))
+ return 1;
+ }
+ return 0;
+}
+
+static int read_profile(FILE *fin, int *not_found)
+{
+ struct trace_output_hdr hdr;
+
+ *not_found = 0;
+ while (!feof(fin)) {
+ int err;
+
+ err = read_data(fin, &hdr, sizeof(hdr));
+ if (err == 1)
+ break; /* EOF */
+ else if (err)
+ return 1;
+
+ switch (hdr.type) {
+ case TRACE_CHUNK_FUNCS:
+ /* Ignored at present */
+ break;
+
+ case TRACE_CHUNK_CALLS:
+ if (read_calls(fin, hdr.rec_count))
+ return 1;
+ break;
+ }
+ }
+ return 0;
+}
+
+static int read_map_file(const char *fname)
+{
+ FILE *fmap;
+ int err = 0;
+
+ fmap = fopen(fname, "r");
+ if (!fmap) {
+ error("Cannot open map file '%s'\n", fname);
+ return 1;
+ }
+ if (fmap) {
+ err = read_system_map(fmap);
+ fclose(fmap);
+ }
+ return err;
+}
+
+static int read_profile_file(const char *fname)
+{
+ int not_found = INT_MAX;
+ FILE *fprof;
+ int err;
+
+ fprof = fopen(fname, "rb");
+ if (!fprof) {
+ error("Cannot open profile data file '%s'\n",
+ fname);
+ return 1;
+ } else {
+ err = read_profile(fprof, ¬_found);
+ fclose(fprof);
+ if (err)
+ return err;
+
+ if (not_found) {
+ warn("%d profile functions could not be found in the map file - are you sure that your profile data and map file correspond?\n",
+ not_found);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int regex_report_error(regex_t *regex, int err, const char *op,
+ const char *name)
+{
+ char buf[200];
+
+ regerror(err, regex, buf, sizeof(buf));
+ error("Regex error '%s' in %s '%s'\n", buf, op, name);
+ return -1;
+}
+
+static void check_trace_config_line(struct trace_configline_info *item)
+{
+ struct func_info *func, *end;
+ int err;
+
+ debug("Checking trace config line '%s'\n", item->name);
+ for (func = func_list, end = func + func_count; func < end; func++) {
+ err = regexec(&item->regex, func->name, 0, NULL, 0);
+ debug(" - regex '%s', string '%s': %d\n", item->name,
+ func->name, err);
+ if (err == REG_NOMATCH)
+ continue;
+
+ if (err != REG_NOERROR) {
+ regex_report_error(&item->regex, err, "match",
+ item->name);
+ break;
+ }
+
+ /* It matches, so perform the action */
+ switch (item->type) {
+ case TRACE_LINE_INCLUDE:
+ info(" include %s at %lx\n", func->name,
+ text_offset + func->offset);
+ func->flags |= FUNCF_TRACE;
+ break;
+
+ case TRACE_LINE_EXCLUDE:
+ info(" exclude %s at %lx\n", func->name,
+ text_offset + func->offset);
+ func->flags &= ~FUNCF_TRACE;
+ break;
+ }
+ }
+}
+
+static void check_trace_config(void)
+{
+ struct trace_configline_info *line;
+
+ for (line = trace_config_head; line; line = line->next)
+ check_trace_config_line(line);
+}
+
+/**
+ * Check the functions to see if they each have an objsection. If not, then
+ * the linker must have eliminated them.
+ */
+static void check_functions(void)
+{
+ struct func_info *func, *end;
+ unsigned long removed_code_size = 0;
+ int not_found = 0;
+
+ /* Look for missing functions */
+ for (func = func_list, end = func + func_count; func < end; func++) {
+ if (!func->objsection) {
+ removed_code_size += func->code_size;
+ not_found++;
+ }
+ }
+
+ /* Figure out what functions we want to trace */
+ check_trace_config();
+
+ warn("%d functions removed by linker, %ld code size\n",
+ not_found, removed_code_size);
+}
+
+static int read_trace_config(FILE *fin)
+{
+ char buff[200];
+ int linenum = 0;
+ struct trace_configline_info **tailp = &trace_config_head;
+
+ while (fgets(buff, sizeof(buff), fin)) {
+ int len = strlen(buff);
+ struct trace_configline_info *line;
+ char *saveptr;
+ char *s, *tok;
+ int err;
+
+ linenum++;
+ if (len && buff[len - 1] == '\n')
+ buff[len - 1] = '\0';
+
+ /* skip blank lines and comments */
+ for (s = buff; *s == ' ' || *s == '\t'; s++)
+ ;
+ if (!*s || *s == '#')
+ continue;
+
+ line = (struct trace_configline_info *)calloc(1,
+ sizeof(*line));
+ if (!line) {
+ error("Cannot allocate config line\n");
+ return -1;
+ }
+
+ tok = strtok_r(s, " \t", &saveptr);
+ if (!tok) {
+ error("Invalid trace config data on line %d\n",
+ linenum);
+ return -1;
+ }
+ if (0 == strcmp(tok, "include-func")) {
+ line->type = TRACE_LINE_INCLUDE;
+ } else if (0 == strcmp(tok, "exclude-func")) {
+ line->type = TRACE_LINE_EXCLUDE;
+ } else {
+ error("Unknown command in trace config data line %d\n",
+ linenum);
+ return -1;
+ }
+
+ tok = strtok_r(NULL, " \t", &saveptr);
+ if (!tok) {
+ error("Missing pattern in trace config data line %d\n",
+ linenum);
+ return -1;
+ }
+
+ err = regcomp(&line->regex, tok, REG_NOSUB);
+ if (err) {
+ free(line);
+ return regex_report_error(&line->regex, err, "compile",
+ tok);
+ }
+
+ /* link this new one to the end of the list */
+ line->name = strdup(tok);
+ line->next = NULL;
+ *tailp = line;
+ tailp = &line->next;
+ }
+
+ if (!feof(fin)) {
+ error("Cannot read from trace config file at position %ld\n",
+ ftell(fin));
+ return -1;
+ }
+ return 0;
+}
+
+static int read_trace_config_file(const char *fname)
+{
+ FILE *fin;
+ int err;
+
+ fin = fopen(fname, "r");
+ if (!fin) {
+ error("Cannot open trace_config file '%s'\n", fname);
+ return -1;
+ }
+ err = read_trace_config(fin);
+ fclose(fin);
+ return err;
+}
+
+static void out_func(ulong func_offset, int is_caller, const char *suffix)
+{
+ struct func_info *func;
+
+ func = (is_caller ? find_caller_by_offset : find_func_by_offset)
+ (func_offset);
+
+ if (func)
+ printf("%s%s", func->name, suffix);
+ else
+ printf("%lx%s", func_offset, suffix);
+}
+
+/*
+ * # tracer: function
+ * #
+ * # TASK-PID CPU# TIMESTAMP FUNCTION
+ * # | | | | |
+ * # bash-4251 [01] 10152.583854: path_put <-path_walk
+ * # bash-4251 [01] 10152.583855: dput <-path_put
+ * # bash-4251 [01] 10152.583855: _atomic_dec_and_lock <-dput
+ */
+static int make_ftrace(void)
+{
+ struct trace_call *call;
+ int missing_count = 0, skip_count = 0;
+ int i;
+
+ printf("# tracer: ftrace\n"
+ "#\n"
+ "# TASK-PID CPU# TIMESTAMP FUNCTION\n"
+ "# | | | | |\n");
+ for (i = 0, call = call_list; i < call_count; i++, call++) {
+ struct func_info *func = find_func_by_offset(call->func);
+ ulong time = call->flags & FUNCF_TIMESTAMP_MASK;
+
+ if (TRACE_CALL_TYPE(call) != FUNCF_ENTRY &&
+ TRACE_CALL_TYPE(call) != FUNCF_EXIT)
+ continue;
+ if (!func) {
+ warn("Cannot find function at %lx\n",
+ text_offset + call->func);
+ missing_count++;
+ continue;
+ }
+
+ if (!(func->flags & FUNCF_TRACE)) {
+ debug("Funcion '%s' is excluded from trace\n",
+ func->name);
+ skip_count++;
+ continue;
+ }
+
+ printf("%16s-%-5d [01] %lu.%06lu: ", "uboot", 1,
+ time / 1000000, time % 1000000);
+
+ out_func(call->func, 0, " <- ");
+ out_func(call->caller, 1, "\n");
+ }
+ info("ftrace: %d functions not found, %d excluded\n", missing_count,
+ skip_count);
+
+ return 0;
+}
+
+static int prof_tool(int argc, char * const argv[],
+ const char *prof_fname, const char *map_fname,
+ const char *trace_config_fname)
+{
+ int err = 0;
+
+ if (read_map_file(map_fname))
+ return -1;
+ if (prof_fname && read_profile_file(prof_fname))
+ return -1;
+ if (trace_config_fname && read_trace_config_file(trace_config_fname))
+ return -1;
+
+ check_functions();
+
+ for (; argc; argc--, argv++) {
+ const char *cmd = *argv;
+
+ if (0 == strcmp(cmd, "dump-ftrace"))
+ err = make_ftrace();
+ else
+ warn("Unknown command '%s'\n", cmd);
+ }
+
+ return err;
+}
+
+int main(int argc, char *argv[])
+{
+ const char *map_fname = "System.map";
+ const char *prof_fname = NULL;
+ const char *trace_config_fname = NULL;
+ int opt;
+
+ verbose = 2;
+ while ((opt = getopt(argc, argv, "m:p:t:v:")) != -1) {
+ switch (opt) {
+ case 'm':
+ map_fname = optarg;
+ break;
+
+ case 'p':
+ prof_fname = optarg;
+ break;
+
+ case 't':
+ trace_config_fname = optarg;
+ break;
+
+ case 'v':
+ verbose = atoi(optarg);
+ break;
+
+ default:
+ usage();
+ }
+ }
+ argc -= optind; argv += optind;
+ if (argc < 1)
+ usage();
+
+ debug("Debug enabled\n");
+ return prof_tool(argc, argv, prof_fname, map_fname,
+ trace_config_fname);
+}
--
1.8.3
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