trace2: collect Windows-specific process information

Add platform-specific interface to log information about the current
process.

On Windows, this interface is used to indicate whether the git process
is running under a debugger and list names of the process ancestors.

Information for other platforms is left for a future effort.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/trace2.h b/trace2.h
index fce9891f53..ae5020d0e6 100644
--- a/trace2.h
+++ b/trace2.h
@@ -368,4 +368,18 @@ void trace2_printf(const char *fmt, ...);
 /* clang-format on */
 #endif
 
+/*
+ * Optional platform-specific code to dump information about the
+ * current and any parent process(es).  This is intended to allow
+ * post-processors to know who spawned this git instance and anything
+ * else the platform may be able to tell us about the current process.
+ */
+#if defined(GIT_WINDOWS_NATIVE)
+void trace2_collect_process_info(void);
+#else
+#define trace2_collect_process_info() \
+	do {                          \
+	} while (0)
+#endif
+
 #endif /* TRACE2_H */