Add changelog

Changelog.md

@@ -0,0 +1,7 @@
+
+0.5.2
+ - Add trace_pid (Thanks to @felstead https://github.com/nico-abram/blondie/pull/67)
+ - Filter empty callstacks from the generated output (They crashed inferno in an underflow in debug mode)
+
+0.4.2
+ - Resolve relative PDB paths (Implemented by @Systemcluster https://github.com/nico-abram/blondie/pull/66)

README.md

@@ -15,7 +15,8 @@ The `blondie_dtrace` binary can be used as a dtrace replacement in [cargo-flameg
 
 Examples:
 
-    ./blondie.exe ./target/debug/some_binary_with_debuginfo.exe arg1 arg2 ; ./flamegraph.svg
+    ./blondie.exe flamegraph ./target/debug/some_binary_with_debuginfo.exe arg1 arg2
+    ./flamegraph.svg
 
     cargo build --release --bin blondie_dtrace
     $ENV:DTRACE = "current_dir/target/release/blondie_dtrace.exe" # Or set DTRACE="current_dir/target/release/blondie_dtrace.exe" in cmd.exe
@@ -29,7 +30,7 @@ This is built using the [ETW(Event Tracing for Windows)](https://docs.microsoft.
 # Future work?
 
 - Test on windows 7 and probably fix the things that don't work.
-- Make it possible to trace a pre-existing pid instead of requiring a command to launch.
+- ~~Make it possible to trace a pre-existing pid instead of requiring a command to launch.~~ (Thanks to @felstead for implementing this!)
 - Use ETW filters to only receive events for the target process (We currently filter ourselves and discard events from other processes). See https://docs.microsoft.com/en-us/windows/win32/api/evntrace/nf-evntrace-starttracea https://docs.microsoft.com/en-us/windows/win32/api/evntrace/ns-evntrace-event_trace_properties_v2 https://docs.microsoft.com/en-us/windows/win32/api/evntprov/ns-evntprov-event_filter_descriptor specifically EVENT_FILTER_TYPE_PID (note: Does not work on Win7 via StartTrace, would need to use EnableTraceEx2 if we care about Win7)
 - Write a general ETW rust library.