[U-Boot] [PATCH v5 0/6] Iotrace improvements

[U-Boot] [PATCH v5 0/6] Iotrace improvements

[Ramon Fried]

These set of patches add few improvements to iotrace.
* Region limiting - allows setting an address and size where only
                                        io operations that falls into that address are
                                        logged.
* Timestamping - Timestamp every iotrace record with current timestamp
* dumping - iotrace dump command for dumping all records from buffer
                        in a readable fashion.

In terms of backwards compatibility, the timestamp is not backward
compatible as it changes the iotrace record. so if one developed an
offline parsing tool it will be broken.
I though of adding #ifdef specific for that, but eventually I didn't.

Changes in v5:
- Removed common.h include that caused werid compliation problems
in other boards (trini)
- Fixed portability issue in printf (trini)

Changes in v4:
- Resend complete patchset with patman

Changes in v3:
- fixed wrong usage of WARN_ONCE

Changes in v2:
- introduced needed_size to notify the user about the needed buffer size.

Changes in v1:
- Change timestamp function to get_ticks()

Ramon Fried (6):
  cmd: iotrace: add set region command
  iotrace: add IO region limit
  common: iotrace: add timestamp to iotrace records
  iotrace: move record definitons to header file
  cmd: iotrace: add dump trace command
  iotrace: fix behaviour when buffer is full

 cmd/iotrace.c     | 63 ++++++++++++++++++++++++++++++++++++++++++---
 common/iotrace.c  | 65 +++++++++++++++++++++++++++--------------------
 include/iotrace.h | 57 +++++++++++++++++++++++++++++++++++++++--
 3 files changed, 153 insertions(+), 32 deletions(-)

-- 
2.17.1

[U-Boot] [PATCH v5 1/6] cmd: iotrace: add set region command

[Ramon Fried]

Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

---

Changes in v5: None
Changes in v4:
- Resend complete patchset with patman

Changes in v3: None
Changes in v2: None
Changes in v1: None

 cmd/iotrace.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/cmd/iotrace.c b/cmd/iotrace.c
index e496787e0d..601b8c8e32 100644
--- a/cmd/iotrace.c
+++ b/cmd/iotrace.c
@@ -15,6 +15,9 @@ static void do_print_stats(void)
 	iotrace_get_buffer(&start, &size, &offset, &count);
 	printf("Start:  %08lx\n", start);
 	printf("Size:   %08lx\n", size);
+	iotrace_get_region(&start, &size);
+	printf("Region: %08lx\n", start);
+	printf("Size:   %08lx\n", size);
 	printf("Offset: %08lx\n", offset);
 	printf("Output: %08lx\n", start + offset);
 	printf("Count:  %08lx\n", count);
@@ -37,6 +40,22 @@ static int do_set_buffer(int argc, char * const argv[])
 	return 0;
 }
 
+static int do_set_region(int argc, char * const argv[])
+{
+	ulong addr = 0, size = 0;
+
+	if (argc == 2) {
+		addr = simple_strtoul(*argv++, NULL, 16);
+		size = simple_strtoul(*argv++, NULL, 16);
+	} else if (argc != 0) {
+		return CMD_RET_USAGE;
+	}
+
+	iotrace_set_region(addr, size);
+
+	return 0;
+}
+
 int do_iotrace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	const char *cmd = argc < 2 ? NULL : argv[1];
@@ -46,6 +65,8 @@ int do_iotrace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	switch (*cmd) {
 	case 'b':
 		return do_set_buffer(argc - 2, argv + 2);
+	case 'l':
+		return do_set_region(argc - 2, argv + 2);
 	case 'p':
 		iotrace_set_enabled(0);
 		break;
@@ -67,6 +88,7 @@ U_BOOT_CMD(
 	"iotrace utility commands",
 	"stats                        - display iotrace stats\n"
 	"iotrace buffer <address> <size>      - set iotrace buffer\n"
+	"iotrace limit <address> <size>       - set iotrace region limit\n"
 	"iotrace pause                        - pause tracing\n"
 	"iotrace resume                       - resume tracing"
 );
-- 
2.17.1

[U-Boot] [PATCH v5 2/6] iotrace: add IO region limit

[Ramon Fried]

When dealing with a lot of IO regions, sometimes
it makes sense only to trace a specific one.
This patch adds support for region limits.
If region is not set, the iotrace works the same as it was.
If region is set, the iotrace only logs io operation that falls
in the defined region.

Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
Changes in v1: None

 common/iotrace.c  | 27 +++++++++++++++++++++++++++
 include/iotrace.h | 24 ++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/common/iotrace.c b/common/iotrace.c
index b16b0d612d..f39885663a 100644
--- a/common/iotrace.c
+++ b/common/iotrace.c
@@ -42,6 +42,8 @@ struct iotrace_record {
  * @start:	Start address of iotrace buffer
  * @size:	Size of iotrace buffer in bytes
  * @offset:	Current write offset into iotrace buffer
+ * @region_start: Address of IO region to trace
+ * @region_size: Size of region to trace. if 0 will trace all address space
  * @crc32:	Current value of CRC chceksum of trace records
  * @enabled:	true if enabled, false if disabled
  */
@@ -49,6 +51,8 @@ static struct iotrace {
 	ulong start;
 	ulong size;
 	ulong offset;
+	ulong region_start;
+	ulong region_size;
 	u32 crc32;
 	bool enabled;
 } iotrace;
@@ -66,6 +70,11 @@ static void add_record(int flags, const void *ptr, ulong value)
 	if (!(gd->flags & GD_FLG_RELOC) || !iotrace.enabled)
 		return;
 
+	if (iotrace.region_size)
+		if ((ulong)ptr < iotrace.region_start ||
+		    (ulong)ptr > iotrace.region_start + iotrace.region_size)
+			return;
+
 	/* Store it if there is room */
 	if (iotrace.offset + sizeof(*rec) < iotrace.size) {
 		rec = (struct iotrace_record *)map_sysmem(
@@ -142,6 +151,24 @@ u32 iotrace_get_checksum(void)
 	return iotrace.crc32;
 }
 
+void iotrace_set_region(ulong start, ulong size)
+{
+	iotrace.region_start = start;
+	iotrace.region_size = size;
+}
+
+void iotrace_reset_region(void)
+{
+	iotrace.region_start = 0;
+	iotrace.region_size = 0;
+}
+
+void iotrace_get_region(ulong *start, ulong *size)
+{
+	*start = iotrace.region_start;
+	*size = iotrace.region_size;
+}
+
 void iotrace_set_enabled(int enable)
 {
 	iotrace.enabled = enable;
diff --git a/include/iotrace.h b/include/iotrace.h
index 9fe5733f87..1efb117343 100644
--- a/include/iotrace.h
+++ b/include/iotrace.h
@@ -58,6 +58,30 @@ void iotrace_reset_checksum(void);
  */
 u32 iotrace_get_checksum(void);
 
+/**
+ * iotrace_set_region() - Set whether iotrace is limited to a specific
+ * io region.
+ *
+ * Defines the address and size of the limited region.
+ *
+ * @start: address of the beginning of the region
+ * @size: size of the region in bytes.
+ */
+void iotrace_set_region(ulong start, ulong size);
+
+/**
+ * iotrace_reset_region() - Reset the region limit
+ */
+void iotrace_reset_region(void);
+
+/**
+ * iotrace_get_region() - Get region information
+ *
+ * @start: Returns start address of region
+ * @size: Returns size of region in bytes
+ */
+void iotrace_get_region(ulong *start, ulong *size);
+
 /**
  * iotrace_set_enabled() - Set whether iotracing is enabled or not
  *
-- 
2.17.1

[U-Boot] [PATCH v5 3/6] common: iotrace: add timestamp to iotrace records

[Ramon Fried]

Add timestamp to each iotrace record to aid in debugging
of IO timing access bugs.

Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

---

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
Changes in v1:
- Change timestamp function to get_ticks()

 common/iotrace.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/iotrace.c b/common/iotrace.c
index f39885663a..2f03a6082e 100644
--- a/common/iotrace.c
+++ b/common/iotrace.c
@@ -27,11 +27,13 @@ enum iotrace_flags {
  * struct iotrace_record - Holds a single I/O trace record
  *
  * @flags: I/O access type
+ * @timestamp: Timestamp of access
  * @addr: Address of access
  * @value: Value written or read
  */
 struct iotrace_record {
 	enum iotrace_flags flags;
+	u64 timestamp;
 	phys_addr_t addr;
 	iovalue_t value;
 };
@@ -81,7 +83,7 @@ static void add_record(int flags, const void *ptr, ulong value)
 					iotrace.start + iotrace.offset,
 					sizeof(value));
 	}
-
+	rec->timestamp = timer_get_us();
 	rec->flags = flags;
 	rec->addr = map_to_sysmem(ptr);
 	rec->value = value;
-- 
2.17.1

[U-Boot] [PATCH v5 4/6] iotrace: move record definitons to header file

[Ramon Fried]

The header definitions are needed for reading
record information in cmd/iotrace.c

Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

---

Changes in v5:
- Removed common.h include that caused werid compliation problems
in other boards (trini)

Changes in v4: None
Changes in v3: None
Changes in v2: None
Changes in v1: None

 common/iotrace.c  | 27 ---------------------------
 include/iotrace.h | 28 ++++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/common/iotrace.c b/common/iotrace.c
index 2f03a6082e..83691b1dba 100644
--- a/common/iotrace.c
+++ b/common/iotrace.c
@@ -11,33 +11,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-/* Support up to the machine word length for now */
-typedef ulong iovalue_t;
-
-enum iotrace_flags {
-	IOT_8 = 0,
-	IOT_16,
-	IOT_32,
-
-	IOT_READ = 0 << 3,
-	IOT_WRITE = 1 << 3,
-};
-
-/**
- * struct iotrace_record - Holds a single I/O trace record
- *
- * @flags: I/O access type
- * @timestamp: Timestamp of access
- * @addr: Address of access
- * @value: Value written or read
- */
-struct iotrace_record {
-	enum iotrace_flags flags;
-	u64 timestamp;
-	phys_addr_t addr;
-	iovalue_t value;
-};
-
 /**
  * struct iotrace - current trace status and checksum
  *
diff --git a/include/iotrace.h b/include/iotrace.h
index 1efb117343..063371f23f 100644
--- a/include/iotrace.h
+++ b/include/iotrace.h
@@ -6,8 +6,36 @@
 #ifndef __IOTRACE_H
 #define __IOTRACE_H
 
+//#include <common.h>
 #include <linux/types.h>
 
+/* Support up to the machine word length for now */
+typedef ulong iovalue_t;
+
+enum iotrace_flags {
+	IOT_8 = 0,
+	IOT_16,
+	IOT_32,
+
+	IOT_READ = 0 << 3,
+	IOT_WRITE = 1 << 3,
+};
+
+/**
+ * struct iotrace_record - Holds a single I/O trace record
+ *
+ * @flags: I/O access type
+ * @timestamp: Timestamp of access
+ * @addr: Address of access
+ * @value: Value written or read
+ */
+struct iotrace_record {
+	enum iotrace_flags flags;
+	u64 timestamp;
+	phys_addr_t addr;
+	iovalue_t value;
+};
+
 /*
  * This file is designed to be included in arch/<arch>/include/asm/io.h.
  * It redirects all IO access through a tracing/checksumming feature for
-- 
2.17.1

[U-Boot] [PATCH v5 5/6] cmd: iotrace: add dump trace command

[Ramon Fried]

Add dump trace command which dump all trace
buffer content in a much more readable fashion
than md.

Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

---

Changes in v5:
- Fixed portability issue in printf (trini)

Changes in v4: None
Changes in v3: None
Changes in v2: None
Changes in v1: None

 cmd/iotrace.c | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/cmd/iotrace.c b/cmd/iotrace.c
index 601b8c8e32..f8ce3398af 100644
--- a/cmd/iotrace.c
+++ b/cmd/iotrace.c
@@ -24,6 +24,36 @@ static void do_print_stats(void)
 	printf("CRC32:  %08lx\n", (ulong)iotrace_get_checksum());
 }
 
+static void do_print_trace(void)
+{
+	ulong start, size, offset, count;
+
+	struct iotrace_record *cur_record;
+
+	iotrace_get_buffer(&start, &size, &offset, &count);
+
+	if (!start || !size || !count)
+		return;
+
+	printf("Timestamp  Value          Address\n");
+
+	cur_record = (struct iotrace_record *)start;
+	for (int i = 0; i < count; i++) {
+		if (cur_record->flags & IOT_WRITE)
+			printf("%08llu: 0x%08lx --> 0x%08llx\n",
+			       cur_record->timestamp,
+					cur_record->value,
+					(unsigned long long)cur_record->addr);
+		else
+			printf("%08llu: 0x%08lx <-- 0x%08llx\n",
+			       cur_record->timestamp,
+					cur_record->value,
+					(unsigned long long)cur_record->addr);
+
+		cur_record++;
+	}
+}
+
 static int do_set_buffer(int argc, char * const argv[])
 {
 	ulong addr = 0, size = 0;
@@ -76,6 +106,9 @@ int do_iotrace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	case 's':
 		do_print_stats();
 		break;
+	case 'd':
+		do_print_trace();
+		break;
 	default:
 		return CMD_RET_USAGE;
 	}
@@ -90,5 +123,6 @@ U_BOOT_CMD(
 	"iotrace buffer <address> <size>      - set iotrace buffer\n"
 	"iotrace limit <address> <size>       - set iotrace region limit\n"
 	"iotrace pause                        - pause tracing\n"
-	"iotrace resume                       - resume tracing"
+	"iotrace resume                       - resume tracing\n"
+	"iotrace dump                         - dump iotrace buffer"
 );
-- 
2.17.1

[U-Boot] [PATCH v5 6/6] iotrace: fix behaviour when buffer is full

[Ramon Fried]

Don't continue updating the offset when buffer is full.
When the buffer size exhausts and there's no space left to write
warn the user and update only the needed size and not both the
offset and needed size.

Add needed buffer size information in the iotrace command.

Signed-off-by: Ramon Fried <ramon.fried@gmail.com>

---

Changes in v5: None
Changes in v4: None
Changes in v3:
- fixed wrong usage of WARN_ONCE

Changes in v2:
- introduced needed_size to notify the user about the needed buffer size.

Changes in v1: None

 cmd/iotrace.c     | 11 ++++++-----
 common/iotrace.c  | 13 +++++++++++--
 include/iotrace.h |  5 +++--
 3 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/cmd/iotrace.c b/cmd/iotrace.c
index f8ce3398af..fa6c68b198 100644
--- a/cmd/iotrace.c
+++ b/cmd/iotrace.c
@@ -9,12 +9,13 @@
 
 static void do_print_stats(void)
 {
-	ulong start, size, offset, count;
+	ulong start, size, needed_size, offset, count;
 
 	printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis");
-	iotrace_get_buffer(&start, &size, &offset, &count);
+	iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
 	printf("Start:  %08lx\n", start);
-	printf("Size:   %08lx\n", size);
+	printf("Actual Size:   %08lx\n", size);
+	printf("Needed Size:   %08lx\n", needed_size);
 	iotrace_get_region(&start, &size);
 	printf("Region: %08lx\n", start);
 	printf("Size:   %08lx\n", size);
@@ -26,11 +27,11 @@ static void do_print_stats(void)
 
 static void do_print_trace(void)
 {
-	ulong start, size, offset, count;
+	ulong start, size, needed_size, offset, count;
 
 	struct iotrace_record *cur_record;
 
-	iotrace_get_buffer(&start, &size, &offset, &count);
+	iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
 
 	if (!start || !size || !count)
 		return;
diff --git a/common/iotrace.c b/common/iotrace.c
index 83691b1dba..49bee3c92a 100644
--- a/common/iotrace.c
+++ b/common/iotrace.c
@@ -15,7 +15,8 @@ DECLARE_GLOBAL_DATA_PTR;
  * struct iotrace - current trace status and checksum
  *
  * @start:	Start address of iotrace buffer
- * @size:	Size of iotrace buffer in bytes
+ * @size:	Actual size of iotrace buffer in bytes
+ * @needed_size: Needed of iotrace buffer in bytes
  * @offset:	Current write offset into iotrace buffer
  * @region_start: Address of IO region to trace
  * @region_size: Size of region to trace. if 0 will trace all address space
@@ -25,6 +26,7 @@ DECLARE_GLOBAL_DATA_PTR;
 static struct iotrace {
 	ulong start;
 	ulong size;
+	ulong needed_size;
 	ulong offset;
 	ulong region_start;
 	ulong region_size;
@@ -55,7 +57,12 @@ static void add_record(int flags, const void *ptr, ulong value)
 		rec = (struct iotrace_record *)map_sysmem(
 					iotrace.start + iotrace.offset,
 					sizeof(value));
+	} else {
+		WARN_ONCE(1, "WARNING: iotrace buffer exhausted, please check needed length using \"iotrace stats\"\n");
+		iotrace.needed_size += sizeof(struct iotrace_record);
+		return;
 	}
+
 	rec->timestamp = timer_get_us();
 	rec->flags = flags;
 	rec->addr = map_to_sysmem(ptr);
@@ -65,6 +72,7 @@ static void add_record(int flags, const void *ptr, ulong value)
 	iotrace.crc32 = crc32(iotrace.crc32, (unsigned char *)rec,
 			      sizeof(*rec));
 
+	iotrace.needed_size += sizeof(struct iotrace_record);
 	iotrace.offset += sizeof(struct iotrace_record);
 }
 
@@ -162,10 +170,11 @@ void iotrace_set_buffer(ulong start, ulong size)
 	iotrace.crc32 = 0;
 }
 
-void iotrace_get_buffer(ulong *start, ulong *size, ulong *offset, ulong *count)
+void iotrace_get_buffer(ulong *start, ulong *size, ulong *needed_size, ulong *offset, ulong *count)
 {
 	*start = iotrace.start;
 	*size = iotrace.size;
+	*needed_size = iotrace.needed_size;
 	*offset = iotrace.offset;
 	*count = iotrace.offset / sizeof(struct iotrace_record);
 }
diff --git a/include/iotrace.h b/include/iotrace.h
index 063371f23f..be1d2753e1 100644
--- a/include/iotrace.h
+++ b/include/iotrace.h
@@ -146,11 +146,12 @@ void iotrace_set_buffer(ulong start, ulong size);
  * iotrace_get_buffer() - Get buffer information
  *
  * @start: Returns start address of buffer
- * @size: Returns size of buffer in bytes
+ * @size: Returns actual size of buffer in bytes
+ * @needed_size: Returns needed size of buffer in bytes
  * @offset: Returns the byte offset where the next output trace record will
  * @count: Returns the number of trace records recorded
  * be written (or would be if the buffer was large enough)
  */
-void iotrace_get_buffer(ulong *start, ulong *size, ulong *offset, ulong *count);
+void iotrace_get_buffer(ulong *start, ulong *size, ulong *needed_size, ulong *offset, ulong *count);
 
 #endif /* __IOTRACE_H */
-- 
2.17.1

[U-Boot] [U-Boot,v5,1/6] cmd: iotrace: add set region command

[Tom Rini]

On Fri, Jun 08, 2018 at 08:53:22PM +0300, Ramon Fried wrote:

> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot] [U-Boot,v5,2/6] iotrace: add IO region limit

[Tom Rini]

On Fri, Jun 08, 2018 at 08:53:23PM +0300, Ramon Fried wrote:

> When dealing with a lot of IO regions, sometimes
> it makes sense only to trace a specific one.
> This patch adds support for region limits.
> If region is not set, the iotrace works the same as it was.
> If region is set, the iotrace only logs io operation that falls
> in the defined region.
> 
> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot] [U-Boot, v5, 3/6] common: iotrace: add timestamp to iotrace records

[Tom Rini]

On Fri, Jun 08, 2018 at 08:53:24PM +0300, Ramon Fried wrote:

> Add timestamp to each iotrace record to aid in debugging
> of IO timing access bugs.
> 
> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot] [U-Boot, v5, 4/6] iotrace: move record definitons to header file

[Tom Rini]

On Fri, Jun 08, 2018 at 08:53:25PM +0300, Ramon Fried wrote:

> The header definitions are needed for reading
> record information in cmd/iotrace.c
> 
> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot] [U-Boot,v5,5/6] cmd: iotrace: add dump trace command

[Tom Rini]

On Fri, Jun 08, 2018 at 08:53:26PM +0300, Ramon Fried wrote:

> Add dump trace command which dump all trace
> buffer content in a much more readable fashion
> than md.
> 
> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot] [U-Boot, v5, 6/6] iotrace: fix behaviour when buffer is full

[Tom Rini]

On Fri, Jun 08, 2018 at 08:53:27PM +0300, Ramon Fried wrote:

> Don't continue updating the offset when buffer is full.
> When the buffer size exhausts and there's no space left to write
> warn the user and update only the needed size and not both the
> offset and needed size.
> 
> Add needed buffer size information in the iotrace command.
> 
> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot] [U-Boot,v5,5/6] cmd: iotrace: add dump trace command

[Alexander Graf]

On 06/19/2018 08:41 PM, Tom Rini wrote:
> On Fri, Jun 08, 2018 at 08:53:26PM +0300, Ramon Fried wrote:
>
>> Add dump trace command which dump all trace
>> buffer content in a much more readable fashion
>> than md.
>>
>> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
>> Reviewed-by: Simon Glass <sjg@chromium.org>
> Applied to u-boot/master, thanks!

This fails to compile for me:

cmd/iotrace.c: In function ‘do_print_trace’:
cmd/iotrace.c:42:2: error: ‘for’ loop initial declarations are only 
allowed in C99 mode
   for (int i = 0; i < count; i++) {
   ^
cmd/iotrace.c:42:2: note: use option -std=c99 or -std=gnu99 to compile 
your code
scripts/Makefile.build:278: recipe for target 'cmd/iotrace.o' failed



Alex

[U-Boot] [U-Boot,v5,5/6] cmd: iotrace: add dump trace command

[Tom Rini]

On Thu, Jun 21, 2018 at 05:11:27PM +0200, Alexander Graf wrote:

> On 06/19/2018 08:41 PM, Tom Rini wrote:
> >On Fri, Jun 08, 2018 at 08:53:26PM +0300, Ramon Fried wrote:
> >
> >>Add dump trace command which dump all trace
> >>buffer content in a much more readable fashion
> >>than md.
> >>
> >>Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
> >>Reviewed-by: Simon Glass <sjg@chromium.org>
> >Applied to u-boot/master, thanks!
> 
> This fails to compile for me:
> 
> cmd/iotrace.c: In function ‘do_print_trace’:
> cmd/iotrace.c:42:2: error: ‘for’ loop initial declarations are only allowed
> in C99 mode
>   for (int i = 0; i < count; i++) {
>   ^
> cmd/iotrace.c:42:2: note: use option -std=c99 or -std=gnu99 to compile your
> code
> scripts/Makefile.build:278: recipe for target 'cmd/iotrace.o' failed

Yes.  I didn't notice this part in time, and I've posted a patch to
start using -std=gnu11 globally as that makes more sense to me than
reworking this (and a few other ARM-specific areas) that make use of
this construct.

-- 
Tom
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[U-Boot] [U-Boot,v5,5/6] cmd: iotrace: add dump trace command

[Alexander Graf]

On 06/21/2018 05:20 PM, Tom Rini wrote:
> On Thu, Jun 21, 2018 at 05:11:27PM +0200, Alexander Graf wrote:
>
>> On 06/19/2018 08:41 PM, Tom Rini wrote:
>>> On Fri, Jun 08, 2018 at 08:53:26PM +0300, Ramon Fried wrote:
>>>
>>>> Add dump trace command which dump all trace
>>>> buffer content in a much more readable fashion
>>>> than md.
>>>>
>>>> Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
>>>> Reviewed-by: Simon Glass <sjg@chromium.org>
>>> Applied to u-boot/master, thanks!
>> This fails to compile for me:
>>
>> cmd/iotrace.c: In function ‘do_print_trace’:
>> cmd/iotrace.c:42:2: error: ‘for’ loop initial declarations are only allowed
>> in C99 mode
>>    for (int i = 0; i < count; i++) {
>>    ^
>> cmd/iotrace.c:42:2: note: use option -std=c99 or -std=gnu99 to compile your
>> code
>> scripts/Makefile.build:278: recipe for target 'cmd/iotrace.o' failed
> Yes.  I didn't notice this part in time, and I've posted a patch to
> start using -std=gnu11 globally as that makes more sense to me than
> reworking this (and a few other ARM-specific areas) that make use of
> this construct.

Wouldn't it make more sense to fix this place up for now and postpone 
the -std=gnu11 patch for post-release?


Alex