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[PULL 04/11] tracetool: fix "PRI" macro decoding
From: |
Stefan Hajnoczi |
Subject: |
[PULL 04/11] tracetool: fix "PRI" macro decoding |
Date: |
Mon, 1 Feb 2021 15:46:56 +0000 |
From: Laurent Vivier <lvivier@redhat.com>
macro is not reset after use, so the format decoded is always the
one of the first "PRI" in the format string.
For instance:
vhost_vdpa_set_config(void *dev, uint32_t offset, uint32_t size, \
uint32_t flags) "dev: %p offset: %"PRIu32" \
size: %"PRIu32" flags: 0x%"PRIx32
generates:
printf("%d@%d vhost_vdpa_set_config dev: %p offset: %u size: %u \
flags: 0x%u\n", pid(), gettimeofday_ns(), dev, offset, \
size, flags)
for the "flags" parameter, we can see a "0x%u" rather than a "0x%x"
because the first macro was "PRIu32" (for offset).
In the loop, macro becomes "PRIu32PRIu32PRIx32", and c_macro_to_format()
returns always macro[3] ('u' in this case). This patch resets macro after
the format has been decoded.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20210105191721.120463-3-lvivier@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
scripts/tracetool/format/log_stap.py | 1 +
1 file changed, 1 insertion(+)
diff --git a/scripts/tracetool/format/log_stap.py
b/scripts/tracetool/format/log_stap.py
index b486beb672..3e1186ae9c 100644
--- a/scripts/tracetool/format/log_stap.py
+++ b/scripts/tracetool/format/log_stap.py
@@ -54,6 +54,7 @@ def c_fmt_to_stap(fmt):
else:
if state == STATE_MACRO:
bits.append(c_macro_to_format(macro))
+ macro = ""
state = STATE_LITERAL
elif fmt[i] == ' ' or fmt[i] == '\t':
if state == STATE_MACRO:
--
2.29.2
- [PULL 00/11] Tracing patches, Stefan Hajnoczi, 2021/02/01
- [PULL 01/11] trace: fix simpletrace doc mismerge, Stefan Hajnoczi, 2021/02/01
- [PULL 06/11] trace: add meson custom_target() depend_files for tracetool, Stefan Hajnoczi, 2021/02/01
- [PULL 04/11] tracetool: fix "PRI" macro decoding,
Stefan Hajnoczi <=
- [PULL 07/11] error: rename error_with_timestamp to message_with_timestamp, Stefan Hajnoczi, 2021/02/01
- [PULL 08/11] trace: make the 'log' backend timestamp configurable, Stefan Hajnoczi, 2021/02/01
- [PULL 03/11] trace: recommend "log" backend for getting started with tracing, Stefan Hajnoczi, 2021/02/01
- [PULL 02/11] tracing: convert documentation to rST, Stefan Hajnoczi, 2021/02/01
- [PULL 11/11] trace: update docs with meson build information, Stefan Hajnoczi, 2021/02/01
- [PULL 10/11] trace: document how to specify multiple --trace patterns, Stefan Hajnoczi, 2021/02/01