upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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598 lines
13 KiB
598 lines
13 KiB
/*
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* Copyright (c) 2013 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* Decode and dump U-Boot profiling information */
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#include <assert.h>
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#include <ctype.h>
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#include <limits.h>
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#include <regex.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <compiler.h>
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#include <trace.h>
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#define MAX_LINE_LEN 500
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enum {
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FUNCF_TRACE = 1 << 0, /* Include this function in trace */
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};
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struct func_info {
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unsigned long offset;
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const char *name;
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unsigned long code_size;
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unsigned long call_count;
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unsigned flags;
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/* the section this function is in */
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struct objsection_info *objsection;
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};
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enum trace_line_type {
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TRACE_LINE_INCLUDE,
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TRACE_LINE_EXCLUDE,
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};
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struct trace_configline_info {
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struct trace_configline_info *next;
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enum trace_line_type type;
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const char *name; /* identifier name / wildcard */
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regex_t regex; /* Regex to use if name starts with / */
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};
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/* The contents of the trace config file */
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struct trace_configline_info *trace_config_head;
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struct func_info *func_list;
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int func_count;
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struct trace_call *call_list;
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int call_count;
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int verbose; /* Verbosity level 0=none, 1=warn, 2=notice, 3=info, 4=debug */
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unsigned long text_offset; /* text address of first function */
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static void outf(int level, const char *fmt, ...)
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__attribute__ ((format (__printf__, 2, 3)));
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#define error(fmt, b...) outf(0, fmt, ##b)
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#define warn(fmt, b...) outf(1, fmt, ##b)
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#define notice(fmt, b...) outf(2, fmt, ##b)
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#define info(fmt, b...) outf(3, fmt, ##b)
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#define debug(fmt, b...) outf(4, fmt, ##b)
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static void outf(int level, const char *fmt, ...)
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{
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if (verbose >= level) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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}
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}
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static void usage(void)
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{
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fprintf(stderr,
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"Usage: proftool -cds -v3 <cmd> <profdata>\n"
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"\n"
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"Commands\n"
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" dump-ftrace\t\tDump out textual data in ftrace format\n"
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"\n"
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"Options:\n"
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" -m <map>\tSpecify Systen.map file\n"
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" -t <trace>\tSpecific trace data file (from U-Boot)\n"
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" -v <0-4>\tSpecify verbosity\n");
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exit(EXIT_FAILURE);
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}
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static int h_cmp_offset(const void *v1, const void *v2)
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{
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const struct func_info *f1 = v1, *f2 = v2;
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return (f1->offset / FUNC_SITE_SIZE) - (f2->offset / FUNC_SITE_SIZE);
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}
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static int read_system_map(FILE *fin)
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{
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unsigned long offset, start = 0;
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struct func_info *func;
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char buff[MAX_LINE_LEN];
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char symtype;
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char symname[MAX_LINE_LEN + 1];
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int linenum;
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int alloced;
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for (linenum = 1, alloced = func_count = 0;; linenum++) {
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int fields = 0;
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if (fgets(buff, sizeof(buff), fin))
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fields = sscanf(buff, "%lx %c %100s\n", &offset,
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&symtype, symname);
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if (fields == 2) {
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continue;
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} else if (feof(fin)) {
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break;
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} else if (fields < 2) {
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error("Map file line %d: invalid format\n", linenum);
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return 1;
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}
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/* Must be a text symbol */
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symtype = tolower(symtype);
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if (symtype != 't' && symtype != 'w')
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continue;
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if (func_count == alloced) {
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alloced += 256;
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func_list = realloc(func_list,
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sizeof(struct func_info) * alloced);
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assert(func_list);
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}
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if (!func_count)
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start = offset;
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func = &func_list[func_count++];
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memset(func, '\0', sizeof(*func));
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func->offset = offset - start;
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func->name = strdup(symname);
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func->flags = FUNCF_TRACE; /* trace by default */
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/* Update previous function's code size */
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if (func_count > 1)
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func[-1].code_size = func->offset - func[-1].offset;
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}
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notice("%d functions found in map file\n", func_count);
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text_offset = start;
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return 0;
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}
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static int read_data(FILE *fin, void *buff, int size)
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{
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int err;
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err = fread(buff, 1, size, fin);
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if (!err)
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return 1;
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if (err != size) {
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error("Cannot read profile file at pos %ld\n", ftell(fin));
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return -1;
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}
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return 0;
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}
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static struct func_info *find_func_by_offset(uint32_t offset)
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{
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struct func_info key, *found;
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key.offset = offset;
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found = bsearch(&key, func_list, func_count, sizeof(struct func_info),
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h_cmp_offset);
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return found;
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}
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/* This finds the function which contains the given offset */
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static struct func_info *find_caller_by_offset(uint32_t offset)
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{
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int low; /* least function that could be a match */
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int high; /* greated function that could be a match */
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struct func_info key;
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low = 0;
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high = func_count - 1;
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key.offset = offset;
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while (high > low + 1) {
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int mid = (low + high) / 2;
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int result;
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result = h_cmp_offset(&key, &func_list[mid]);
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if (result > 0)
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low = mid;
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else if (result < 0)
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high = mid;
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else
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return &func_list[mid];
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}
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return low >= 0 ? &func_list[low] : NULL;
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}
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static int read_calls(FILE *fin, int count)
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{
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struct trace_call *call_data;
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int i;
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notice("call count: %d\n", count);
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call_list = (struct trace_call *)calloc(count, sizeof(*call_data));
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if (!call_list) {
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error("Cannot allocate call_list\n");
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return -1;
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}
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call_count = count;
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call_data = call_list;
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for (i = 0; i < count; i++, call_data++) {
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if (read_data(fin, call_data, sizeof(*call_data)))
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return 1;
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}
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return 0;
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}
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static int read_profile(FILE *fin, int *not_found)
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{
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struct trace_output_hdr hdr;
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*not_found = 0;
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while (!feof(fin)) {
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int err;
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err = read_data(fin, &hdr, sizeof(hdr));
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if (err == 1)
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break; /* EOF */
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else if (err)
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return 1;
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switch (hdr.type) {
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case TRACE_CHUNK_FUNCS:
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/* Ignored at present */
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break;
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case TRACE_CHUNK_CALLS:
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if (read_calls(fin, hdr.rec_count))
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return 1;
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break;
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}
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}
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return 0;
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}
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static int read_map_file(const char *fname)
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{
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FILE *fmap;
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int err = 0;
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fmap = fopen(fname, "r");
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if (!fmap) {
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error("Cannot open map file '%s'\n", fname);
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return 1;
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}
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if (fmap) {
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err = read_system_map(fmap);
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fclose(fmap);
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}
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return err;
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}
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static int read_profile_file(const char *fname)
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{
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int not_found = INT_MAX;
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FILE *fprof;
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int err;
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fprof = fopen(fname, "rb");
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if (!fprof) {
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error("Cannot open profile data file '%s'\n",
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fname);
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return 1;
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} else {
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err = read_profile(fprof, ¬_found);
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fclose(fprof);
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if (err)
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return err;
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if (not_found) {
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warn("%d profile functions could not be found in the map file - are you sure that your profile data and map file correspond?\n",
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not_found);
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return 1;
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}
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}
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return 0;
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}
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static int regex_report_error(regex_t *regex, int err, const char *op,
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const char *name)
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{
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char buf[200];
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regerror(err, regex, buf, sizeof(buf));
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error("Regex error '%s' in %s '%s'\n", buf, op, name);
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return -1;
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}
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static void check_trace_config_line(struct trace_configline_info *item)
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{
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struct func_info *func, *end;
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int err;
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debug("Checking trace config line '%s'\n", item->name);
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for (func = func_list, end = func + func_count; func < end; func++) {
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err = regexec(&item->regex, func->name, 0, NULL, 0);
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debug(" - regex '%s', string '%s': %d\n", item->name,
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func->name, err);
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if (err == REG_NOMATCH)
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continue;
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if (err) {
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regex_report_error(&item->regex, err, "match",
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item->name);
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break;
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}
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/* It matches, so perform the action */
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switch (item->type) {
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case TRACE_LINE_INCLUDE:
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info(" include %s at %lx\n", func->name,
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text_offset + func->offset);
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func->flags |= FUNCF_TRACE;
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break;
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case TRACE_LINE_EXCLUDE:
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info(" exclude %s at %lx\n", func->name,
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text_offset + func->offset);
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func->flags &= ~FUNCF_TRACE;
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break;
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}
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}
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}
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static void check_trace_config(void)
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{
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struct trace_configline_info *line;
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for (line = trace_config_head; line; line = line->next)
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check_trace_config_line(line);
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}
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/**
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* Check the functions to see if they each have an objsection. If not, then
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* the linker must have eliminated them.
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*/
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static void check_functions(void)
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{
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struct func_info *func, *end;
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unsigned long removed_code_size = 0;
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int not_found = 0;
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/* Look for missing functions */
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for (func = func_list, end = func + func_count; func < end; func++) {
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if (!func->objsection) {
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removed_code_size += func->code_size;
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not_found++;
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}
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}
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/* Figure out what functions we want to trace */
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check_trace_config();
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warn("%d functions removed by linker, %ld code size\n",
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not_found, removed_code_size);
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}
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static int read_trace_config(FILE *fin)
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{
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char buff[200];
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int linenum = 0;
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struct trace_configline_info **tailp = &trace_config_head;
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while (fgets(buff, sizeof(buff), fin)) {
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int len = strlen(buff);
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struct trace_configline_info *line;
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char *saveptr;
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char *s, *tok;
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int err;
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linenum++;
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if (len && buff[len - 1] == '\n')
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buff[len - 1] = '\0';
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/* skip blank lines and comments */
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for (s = buff; *s == ' ' || *s == '\t'; s++)
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;
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if (!*s || *s == '#')
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continue;
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line = (struct trace_configline_info *)calloc(1,
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sizeof(*line));
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if (!line) {
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error("Cannot allocate config line\n");
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return -1;
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}
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tok = strtok_r(s, " \t", &saveptr);
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if (!tok) {
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error("Invalid trace config data on line %d\n",
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linenum);
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return -1;
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}
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if (0 == strcmp(tok, "include-func")) {
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line->type = TRACE_LINE_INCLUDE;
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} else if (0 == strcmp(tok, "exclude-func")) {
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line->type = TRACE_LINE_EXCLUDE;
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} else {
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error("Unknown command in trace config data line %d\n",
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linenum);
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return -1;
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}
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tok = strtok_r(NULL, " \t", &saveptr);
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if (!tok) {
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error("Missing pattern in trace config data line %d\n",
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linenum);
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return -1;
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}
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err = regcomp(&line->regex, tok, REG_NOSUB);
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if (err) {
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free(line);
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return regex_report_error(&line->regex, err, "compile",
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tok);
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}
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/* link this new one to the end of the list */
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line->name = strdup(tok);
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line->next = NULL;
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*tailp = line;
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tailp = &line->next;
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}
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if (!feof(fin)) {
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error("Cannot read from trace config file at position %ld\n",
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ftell(fin));
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return -1;
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}
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return 0;
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}
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static int read_trace_config_file(const char *fname)
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{
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FILE *fin;
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int err;
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fin = fopen(fname, "r");
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if (!fin) {
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error("Cannot open trace_config file '%s'\n", fname);
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return -1;
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}
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err = read_trace_config(fin);
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fclose(fin);
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return err;
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}
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static void out_func(ulong func_offset, int is_caller, const char *suffix)
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{
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struct func_info *func;
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func = (is_caller ? find_caller_by_offset : find_func_by_offset)
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(func_offset);
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if (func)
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printf("%s%s", func->name, suffix);
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else
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printf("%lx%s", func_offset, suffix);
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}
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/*
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* # tracer: function
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* #
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* # TASK-PID CPU# TIMESTAMP FUNCTION
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* # | | | | |
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* # bash-4251 [01] 10152.583854: path_put <-path_walk
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* # bash-4251 [01] 10152.583855: dput <-path_put
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* # bash-4251 [01] 10152.583855: _atomic_dec_and_lock <-dput
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*/
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static int make_ftrace(void)
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{
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struct trace_call *call;
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int missing_count = 0, skip_count = 0;
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int i;
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printf("# tracer: ftrace\n"
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"#\n"
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"# TASK-PID CPU# TIMESTAMP FUNCTION\n"
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"# | | | | |\n");
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for (i = 0, call = call_list; i < call_count; i++, call++) {
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struct func_info *func = find_func_by_offset(call->func);
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ulong time = call->flags & FUNCF_TIMESTAMP_MASK;
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if (TRACE_CALL_TYPE(call) != FUNCF_ENTRY &&
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TRACE_CALL_TYPE(call) != FUNCF_EXIT)
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continue;
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if (!func) {
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warn("Cannot find function at %lx\n",
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text_offset + call->func);
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missing_count++;
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continue;
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}
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if (!(func->flags & FUNCF_TRACE)) {
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debug("Funcion '%s' is excluded from trace\n",
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func->name);
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skip_count++;
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continue;
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}
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printf("%16s-%-5d [01] %lu.%06lu: ", "uboot", 1,
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time / 1000000, time % 1000000);
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out_func(call->func, 0, " <- ");
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out_func(call->caller, 1, "\n");
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}
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info("ftrace: %d functions not found, %d excluded\n", missing_count,
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skip_count);
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return 0;
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}
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static int prof_tool(int argc, char * const argv[],
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const char *prof_fname, const char *map_fname,
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const char *trace_config_fname)
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{
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int err = 0;
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if (read_map_file(map_fname))
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return -1;
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if (prof_fname && read_profile_file(prof_fname))
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return -1;
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if (trace_config_fname && read_trace_config_file(trace_config_fname))
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return -1;
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check_functions();
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for (; argc; argc--, argv++) {
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const char *cmd = *argv;
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if (0 == strcmp(cmd, "dump-ftrace"))
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err = make_ftrace();
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else
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warn("Unknown command '%s'\n", cmd);
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}
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return err;
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}
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int main(int argc, char *argv[])
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{
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const char *map_fname = "System.map";
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const char *prof_fname = NULL;
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|
const char *trace_config_fname = NULL;
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int opt;
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|
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|
verbose = 2;
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while ((opt = getopt(argc, argv, "m:p:t:v:")) != -1) {
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switch (opt) {
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case 'm':
|
|
map_fname = optarg;
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|
break;
|
|
|
|
case 'p':
|
|
prof_fname = optarg;
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|
break;
|
|
|
|
case 't':
|
|
trace_config_fname = optarg;
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|
break;
|
|
|
|
case 'v':
|
|
verbose = atoi(optarg);
|
|
break;
|
|
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
argc -= optind; argv += optind;
|
|
if (argc < 1)
|
|
usage();
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|
|
|
debug("Debug enabled\n");
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|
return prof_tool(argc, argv, prof_fname, map_fname,
|
|
trace_config_fname);
|
|
}
|
|
|