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[PULL 05/11] tracetool: also strip %l and %ll from systemtap format stri
From: |
Stefan Hajnoczi |
Subject: |
[PULL 05/11] tracetool: also strip %l and %ll from systemtap format strings |
Date: |
Mon, 1 Feb 2021 15:46:57 +0000 |
From: Daniel P. Berrangé <berrange@redhat.com>
All variables are 64-bit and so %l / %ll are not required, and the
latter is actually invalid:
$ sudo stap -e 'probe begin{printf ("BEGIN")}' -I .
parse error: invalid or missing conversion specifier
saw: operator ',' at ./qemu-system-x86_64-log.stp:15118:101
source: printf("%d@%d vhost_vdpa_set_log_base dev: %p base: 0x%x
size: %llu
refcnt: %d fd: %d log: %p\n", pid(), gettimeofday_ns(), dev, base, size,
refcnt, fd, log)
^
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Laurent Vivier <lvivier@redhat.com>
Message-id: 20210106130239.1004729-1-berrange@redhat.com
[Fixed "simiarly" typo found by Laurent Vivier <lvivier@redhat.com>
--Stefan]
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
scripts/tracetool/format/log_stap.py | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/scripts/tracetool/format/log_stap.py
b/scripts/tracetool/format/log_stap.py
index 3e1186ae9c..0b6549d534 100644
--- a/scripts/tracetool/format/log_stap.py
+++ b/scripts/tracetool/format/log_stap.py
@@ -78,7 +78,12 @@ def c_fmt_to_stap(fmt):
elif state == STATE_LITERAL:
bits.append(literal)
- fmt = re.sub("%(\d*)z(x|u|d)", "%\\1\\2", "".join(bits))
+ # All variables in systemtap are 64-bit in size
+ # The "%l" integer size qualifier is thus redundant
+ # and "%ll" is not valid at all. Similarly the size_t
+ # based "%z" size qualifier is not valid. We just
+ # strip all size qualifiers for sanity.
+ fmt = re.sub("%(\d*)(l+|z)(x|u|d)", "%\\1\\3", "".join(bits))
return fmt
def generate(events, backend, group):
--
2.29.2
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, (continued)
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, BALATON Zoltan, 2021/02/01
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, Kevin Wolf, 2021/02/01
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, Paolo Bonzini, 2021/02/01
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, BALATON Zoltan, 2021/02/01
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, Markus Armbruster, 2021/02/02
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, BALATON Zoltan, 2021/02/02
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, Paolo Bonzini, 2021/02/02
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, Daniel P . Berrangé, 2021/02/01
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, BALATON Zoltan, 2021/02/01
- Re: [PULL 10/11] trace: document how to specify multiple --trace patterns, Stefan Hajnoczi, 2021/02/02
[PULL 05/11] tracetool: also strip %l and %ll from systemtap format strings,
Stefan Hajnoczi <=
[PULL 09/11] simpletrace: build() missing 2 required positional arguments, Stefan Hajnoczi, 2021/02/01
Re: [PULL 00/11] Tracing patches, Peter Maydell, 2021/02/02