From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v3 13/25] trace-cmd library: Add macro to check file state on reading
Date: Tue, 14 Sep 2021 16:14:26 +0300 [thread overview]
Message-ID: <20210914131438.3965484-14-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210914131438.3965484-1-tz.stoyanov@gmail.com>
Trace file version 7 has flexible structure. It allows reading almost
any part of the file at any time, unlike the version 6 file when reading
state must be validated at each step. Added a macro to handle these
checks.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
lib/trace-cmd/trace-input.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index de8e0d72..85100aa4 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -165,6 +165,8 @@ struct tracecmd_input {
__thread struct tracecmd_input *tracecmd_curr_thread_handle;
+#define CHECK_READ_STATE(H, S) ((H)->file_version < FILE_VERSION_SECTIONS && (H)->file_state >= (S))
+
static int read_options_type(struct tracecmd_input *handle);
void tracecmd_set_flag(struct tracecmd_input *handle, int flag)
@@ -381,7 +383,7 @@ static int read_header_files(struct tracecmd_input *handle)
char *header;
char buf[BUFSIZ];
- if (handle->file_state >= TRACECMD_FILE_HEADERS)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_HEADERS))
return 0;
if (do_read_check(handle, buf, 12))
@@ -587,7 +589,7 @@ static int read_ftrace_files(struct tracecmd_input *handle, const char *regex)
int unique;
int ret;
- if (handle->file_state >= TRACECMD_FILE_FTRACE_EVENTS)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_FTRACE_EVENTS))
return 0;
if (regex) {
@@ -660,7 +662,7 @@ static int read_event_files(struct tracecmd_input *handle, const char *regex)
int unique;
int ret;
- if (handle->file_state >= TRACECMD_FILE_ALL_EVENTS)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_ALL_EVENTS))
return 0;
if (regex) {
@@ -745,7 +747,7 @@ static int read_proc_kallsyms(struct tracecmd_input *handle)
char *buf = NULL;
int ret;
- if (handle->file_state >= TRACECMD_FILE_KALLSYMS)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_KALLSYMS))
return 0;
ret = read4(handle, &size);
@@ -781,7 +783,7 @@ static int read_ftrace_printk(struct tracecmd_input *handle)
char *buf = NULL;
int ret;
- if (handle->file_state >= TRACECMD_FILE_PRINTK)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_PRINTK))
return 0;
ret = read4(handle, &size);
@@ -832,7 +834,7 @@ static int read_cpus(struct tracecmd_input *handle)
{
unsigned int cpus;
- if (handle->file_state >= TRACECMD_FILE_CPU_COUNT)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_CPU_COUNT))
return 0;
if (read4(handle, &cpus) < 0)
@@ -2838,7 +2840,7 @@ static int read_options_type(struct tracecmd_input *handle)
{
char buf[10];
- if (handle->file_state >= TRACECMD_FILE_CPU_LATENCY)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_CPU_LATENCY))
return 0;
if (do_read_check(handle, buf, 10))
@@ -3004,7 +3006,7 @@ static int read_and_parse_cmdlines(struct tracecmd_input *handle)
char *cmdlines = NULL;
int ret;
- if (handle->file_state >= TRACECMD_FILE_CMD_LINES)
+ if (CHECK_READ_STATE(handle, TRACECMD_FILE_CMD_LINES))
return 0;
ret = read_data_and_size(handle, &cmdlines, &size);
--
2.31.1
next prev parent reply other threads:[~2021-09-14 13:14 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-14 13:14 [PATCH v3 00/25] Trace file version 7 - sections Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 01/25] trace-cmd library: Define trace file version 7 Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 02/25] trace-cmd library: Add cache functionality to network message handler Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 03/25] trace-cmd library: New APIs to get and set version of output handler Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 04/25] trace-cmd library: Add internal helper function for writing headers before file sections Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 05/25] trace-cmd library: Write header " Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 06/25] trace-cmd library: Add multiple options sections in trace file version 7 Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 07/25] trace-cmd library: Do not write CPU count section in trace files " Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 08/25] trace-cmd library: Move CPU flyrecord trace metadata into the buffer option, for trace file " Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 09/25] trace-cmd record: Append trace options after the trace data are written Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 10/25] trace-cmd library: Add section header before flyrecord trace data Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 11/25] trace-cmd library: Fit CPU latency trace data in the new trace file version 7 format Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 12/25] trace-cmd library: Do not write CPUs with empty trace data Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` Tzvetomir Stoyanov (VMware) [this message]
2021-09-14 13:14 ` [PATCH v3 14/25] trace-cmd library: Introduce sections in trace file reading logic Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 15/25] trace-cmd library: Initialize internal sections database on file read Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 16/25] trace-cmd library: Use sections database when reading parts of the trace file Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 17/25] trace-cmd library: Read headers from trace file version 7 Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 18/25] trace-cmd library: Read extended BUFFER option Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 19/25] trace-cmd library: Handle the extended DONE option Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 20/25] trace-cmd library: Initialize CPU data for reading from version 7 trace files Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 21/25] trace-cmd library: Handle latency trace in version 7 files Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 22/25] trace-cmd library: Handle buffer trace data init for " Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 23/25] trace-cmd report: Use the new latency API to read data Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 24/25] trace-cmd: Call additional APIs when creating trace file Tzvetomir Stoyanov (VMware)
2021-09-14 13:14 ` [PATCH v3 25/25] trace-cmd report: Add new parameter for trace file version Tzvetomir Stoyanov (VMware)
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