Add a trace command with sub-commands to start/stop tracing, print out statistics and dump trace information to memory for later upload to a host.
Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v2: - Add cast to clarfy argument type on sandbox and x86
common/Makefile | 1 + common/cmd_trace.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 134 insertions(+) create mode 100644 common/cmd_trace.c
diff --git a/common/Makefile b/common/Makefile index 3ba4316..d40fb1f 100644 --- a/common/Makefile +++ b/common/Makefile @@ -171,6 +171,7 @@ COBJS-$(CONFIG_CMD_SPIBOOTLDR) += cmd_spibootldr.o COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o COBJS-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o COBJS-$(CONFIG_CMD_TIME) += cmd_time.o +COBJS-$(CONFIG_CMD_TRACE) += cmd_trace.o COBJS-$(CONFIG_SYS_HUSH_PARSER) += cmd_test.o COBJS-$(CONFIG_CMD_TPM) += cmd_tpm.o COBJS-$(CONFIG_CMD_TSI148) += cmd_tsi148.o diff --git a/common/cmd_trace.c b/common/cmd_trace.c new file mode 100644 index 0000000..ec3137a --- /dev/null +++ b/common/cmd_trace.c @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * + * 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 + */ + +#include <common.h> +#include <command.h> +#include <trace.h> +#include <asm/io.h> + +static int get_args(int argc, char * const argv[], char **buff, + size_t *buff_ptr, size_t *buff_size) +{ + if (argc < 2) + return -1; + if (argc < 4) { + *buff_size = getenv_ulong("profsize", 16, 0); + *buff = map_sysmem(getenv_ulong("profbase", 16, 0), + *buff_size); + *buff_ptr = getenv_ulong("profoffset", 16, 0); + } else { + *buff_size = simple_strtoul(argv[3], NULL, 16); + *buff = map_sysmem(simple_strtoul(argv[2], NULL, 16), + *buff_size); + *buff_ptr = 0; + }; + return 0; +} + +static int create_func_list(int argc, char * const argv[]) +{ + size_t buff_size, avail, buff_ptr, used; + unsigned int needed; + char *buff; + int err; + + if (get_args(argc, argv, &buff, &buff_ptr, &buff_size)) + return -1; + + avail = buff_size - buff_ptr; + err = trace_list_functions(buff + buff_ptr, avail, &needed); + if (err) + printf("Error: truncated (%#x bytes needed)\n", needed); + used = min(avail, needed); + printf("Function trace dumped to %08lx, size %#zx\n", + (ulong)map_to_sysmem(buff + buff_ptr), used); + setenv_hex("profbase", map_to_sysmem(buff)); + setenv_hex("profsize", buff_size); + setenv_hex("profoffset", buff_ptr + used); + + return 0; +} + +static int create_call_list(int argc, char * const argv[]) +{ + size_t buff_size, avail, buff_ptr, used; + unsigned int needed; + char *buff; + int err; + + if (get_args(argc, argv, &buff, &buff_ptr, &buff_size)) + return -1; + + avail = buff_size - buff_ptr; + err = trace_list_calls(buff + buff_ptr, avail, &needed); + if (err) + printf("Error: truncated (%#x bytes needed)\n", needed); + used = min(avail, needed); + printf("Call list dumped to %08lx, size %#zx\n", + (ulong)map_to_sysmem(buff + buff_ptr), used); + + setenv_hex("profbase", map_to_sysmem(buff)); + setenv_hex("profsize", buff_size); + setenv_hex("profoffset", buff_ptr + used); + + return 0; +} + +int do_trace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + const char *cmd = argc < 2 ? NULL : argv[1]; + + if (!cmd) + return cmd_usage(cmdtp); + switch (*cmd) { + case 'p': + trace_set_enabled(0); + break; + case 'c': + if (create_call_list(argc, argv)) + return cmd_usage(cmdtp); + break; + case 'r': + trace_set_enabled(1); + break; + case 'f': + if (create_func_list(argc, argv)) + return cmd_usage(cmdtp); + break; + case 's': + trace_print_stats(); + break; + default: + return CMD_RET_USAGE; + } + + return 0; +} + +U_BOOT_CMD( + trace, 4, 1, do_trace, + "trace utility commands", + "stats - display tracing statistics\n" + "trace pause - pause tracing\n" + "trace resume - resume tracing\n" + "trace funclist [<addr> <size>] - dump function list into buffer\n" + "trace calls [<addr> <size>] " + "- dump function call trace into buffer" +);