diff mbox series

[06/10] trace-cmd dump: Dump sections

Message ID 20210913125039.3680986-7-tz.stoyanov@gmail.com (mailing list archive)
State Superseded
Headers show
Series trace-cmd dump - v7 update | expand

Commit Message

Tzvetomir Stoyanov (VMware) Sept. 13, 2021, 12:50 p.m. UTC 
In trace file version 7, headers are stored as sections. This allows
their position in the file not to be fixed. Pointers to these sections are
stored as trace options. Add logic to handle these new options:
 HEADER_INFO
 FTRACE_EVENTS
 EVENT_FORMATS
 KALLSYM
 PRINTK
 CMDLINES

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 tracecmd/trace-dump.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
diff mbox series

Patch

diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c
index c44870c4..3394847c 100644
--- a/tracecmd/trace-dump.c
+++ b/tracecmd/trace-dump.c
@@ -668,6 +668,24 @@  void dump_option_tsc2nsec(int fd, int size)
 	do_print(OPTIONS, "%d %d %llu [multiplier, shift, offset]\n", mult, shift, offset);
 }
 
+static void dump_option_section(int fd, unsigned int size,
+				unsigned short id, char *desc, enum dump_items v)
+{
+	struct file_section *sec;
+
+	sec = calloc(1, sizeof(struct file_section));
+	if (!sec)
+		die("cannot allocate new section");
+	sec->next = sections;
+	sections = sec;
+	sec->id = id;
+	sec->verbosity = v;
+	if (read_file_number(fd, &sec->offset, 8))
+		die("cannot read the option %d offset", id);
+	do_print(OPTIONS, "\t\t[Option %s, %d bytes]\n", desc, size);
+	do_print(OPTIONS, "%lld\n", sec->offset);
+}
+
 static int dump_options_read(int fd);
 
 static int dump_option_done(int fd, int size)
@@ -756,6 +774,25 @@  static int dump_options_read(int fd)
 		case TRACECMD_OPTION_TSC2NSEC:
 			dump_option_tsc2nsec(fd, size);
 			break;
+		case TRACECMD_OPTION_HEADER_INFO:
+			dump_option_section(fd, size, option, "HEADERS", HEAD_PAGE | HEAD_EVENT);
+			break;
+		case TRACECMD_OPTION_FTRACE_EVENTS:
+			dump_option_section(fd, size, option, "FTRACE EVENTS", FTRACE_FORMAT);
+			break;
+		case TRACECMD_OPTION_EVENT_FORMATS:
+			dump_option_section(fd, size, option,
+					    "EVENT FORMATS", EVENT_SYSTEMS | EVENT_FORMAT);
+			break;
+		case TRACECMD_OPTION_KALLSYMS:
+			dump_option_section(fd, size, option, "KALLSYMS", KALLSYMS);
+			break;
+		case TRACECMD_OPTION_PRINTK:
+			dump_option_section(fd, size, option, "PRINTK", TRACE_PRINTK);
+			break;
+		case TRACECMD_OPTION_CMDLINES:
+			dump_option_section(fd, size, option, "CMDLINES", CMDLINES);
+			break;
 		case TRACECMD_OPTION_DONE:
 			uncompress_reset();
 			count += dump_option_done(fd, size);