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[PATCH] scripts/tracetool: silence SystemTap dtrace(1) long long warning

From: Stefan Hajnoczi
Subject: [PATCH] scripts/tracetool: silence SystemTap dtrace(1) long long warnings
Date: Tue, 20 Oct 2020 10:40:43 +0100

SystemTap's dtrace(1) prints the following warning when it encounters
long long arguments:

  Warning: /usr/bin/dtrace:trace/trace-dtrace-hw_virtio.dtrace:76: syntax error 
  probe vhost_vdpa_dev_start

  Warning: Proceeding as if --no-pyparsing was given.

Use the uint64_t and int64_t types, respectively. This works with all
host CPU 32- and 64-bit data models (ILP32, LP64, and LLP64) that QEMU

Reported-by: Markus Armbruster <armbru@redhat.com>
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
 scripts/tracetool/format/d.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/tracetool/format/d.py b/scripts/tracetool/format/d.py
index 353722f89c..ebfb714200 100644
--- a/scripts/tracetool/format/d.py
+++ b/scripts/tracetool/format/d.py
@@ -57,6 +57,12 @@ def generate(events, backend, group):
                 # Avoid it by changing probe type to signed char * beforehand.
                 if type_ == 'int8_t *':
                     type_ = 'signed char *'
+            # SystemTap dtrace(1) emits a warning when long long is used
+            type_ = type_.replace('unsigned long long', 'uint64_t')
+            type_ = type_.replace('signed long long', 'int64_t')
+            type_ = type_.replace('long long', 'int64_t')
             if name in RESERVED_WORDS:
                 name += '_'
             args.append(type_ + ' ' + name)

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