[PULL 10/20] tracetool: use relative paths for '#line' preprocessor directives

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From: Thomas De Schampheleire <thomas.de_schampheleire@xxxxxxxxx>

The event filename is an absolute path. Convert it to a relative path when
writing '#line' directives, to preserve reproducibility of the generated
output when different base paths are used.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@xxxxxxxxx>
Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Message-Id: <20230406080045.21696-1-thomas.de_schampheleire@xxxxxxxxx>
---
 scripts/tracetool/backend/ftrace.py | 4 +++-
 scripts/tracetool/backend/log.py    | 4 +++-
 scripts/tracetool/backend/syslog.py | 4 +++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/scripts/tracetool/backend/ftrace.py b/scripts/tracetool/backend/ftrace.py
index 5fa30ccc08..baed2ae61c 100644
--- a/scripts/tracetool/backend/ftrace.py
+++ b/scripts/tracetool/backend/ftrace.py
@@ -12,6 +12,8 @@
 __email__      = "stefanha@xxxxxxxxxx"
 
 
+import os.path
+
 from tracetool import out
 
 
@@ -45,7 +47,7 @@ def generate_h(event, group):
         args=event.args,
         event_id="TRACE_" + event.name.upper(),
         event_lineno=event.lineno,
-        event_filename=event.filename,
+        event_filename=os.path.relpath(event.filename),
         fmt=event.fmt.rstrip("\n"),
         argnames=argnames)
 
diff --git a/scripts/tracetool/backend/log.py b/scripts/tracetool/backend/log.py
index 17ba1cd90e..de27b7e62e 100644
--- a/scripts/tracetool/backend/log.py
+++ b/scripts/tracetool/backend/log.py
@@ -12,6 +12,8 @@
 __email__      = "stefanha@xxxxxxxxxx"
 
 
+import os.path
+
 from tracetool import out
 
 
@@ -53,7 +55,7 @@ def generate_h(event, group):
         '    }',
         cond=cond,
         event_lineno=event.lineno,
-        event_filename=event.filename,
+        event_filename=os.path.relpath(event.filename),
         name=event.name,
         fmt=event.fmt.rstrip("\n"),
         argnames=argnames)
diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
index 5a3a00fe31..012970f6cc 100644
--- a/scripts/tracetool/backend/syslog.py
+++ b/scripts/tracetool/backend/syslog.py
@@ -12,6 +12,8 @@
 __email__      = "stefanha@xxxxxxxxxx"
 
 
+import os.path
+
 from tracetool import out
 
 
@@ -41,7 +43,7 @@ def generate_h(event, group):
         '    }',
         cond=cond,
         event_lineno=event.lineno,
-        event_filename=event.filename,
+        event_filename=os.path.relpath(event.filename),
         name=event.name,
         fmt=event.fmt.rstrip("\n"),
         argnames=argnames)
-- 
2.39.2




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