Add key for block coverage, tests (microsoft#2715)

src/agent/coverage/src/binary.rs

@@ -4,18 +4,19 @@
 use std::collections::{BTreeMap, BTreeSet};
 
 use anyhow::{bail, Result};
-use debuggable_module::{block, path::FilePath, Module, Offset};
+use debuggable_module::Module;
+pub use debuggable_module::{block, path::FilePath, Offset};
 use symbolic::debuginfo::Object;
 use symbolic::symcache::{SymCache, SymCacheConverter};
 
 use crate::allowlist::TargetAllowList;
 
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
 pub struct BinaryCoverage {
     pub modules: BTreeMap<FilePath, ModuleBinaryCoverage>,
 }
 
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Debug, Default, Eq, PartialEq)]
 pub struct ModuleBinaryCoverage {
     pub offsets: BTreeMap<Offset, Count>,
 }

src/agent/onefuzz-file-format/src/coverage/binary/v1.rs

@@ -13,22 +13,29 @@ use crate::hex::Hex;
 #[derive(Deserialize, Serialize)]
 pub struct BinaryCoverageJson {
     #[serde(flatten)]
-    pub modules: BTreeMap<String, BTreeMap<Hex, u32>>,
+    pub modules: BTreeMap<String, ModuleCoverageJson>,
+}
+
+#[derive(Deserialize, Serialize)]
+pub struct ModuleCoverageJson {
+    pub blocks: BTreeMap<Hex, u32>,
 }
 
 impl From<BinaryCoverage> for BinaryCoverageJson {
     fn from(binary: BinaryCoverage) -> Self {
         let mut modules = BTreeMap::new();
 
-        for (module, offsets) in &binary.modules {
-            let mut map: BTreeMap<Hex, u32> = BTreeMap::new();
+        for (path, offsets) in &binary.modules {
+            let mut blocks: BTreeMap<Hex, u32> = BTreeMap::new();
 
             for (offset, count) in offsets.as_ref() {
-                map.insert(Hex(offset.0), count.0);
+                blocks.insert(Hex(offset.0), count.0);
             }
 
-            let path = module.as_str().to_owned();
-            modules.insert(path, map);
+            let path = path.as_str().to_owned();
+            let module = ModuleCoverageJson { blocks };
+
+            modules.insert(path, module);
         }
 
         Self { modules }
@@ -41,15 +48,15 @@ impl TryFrom<BinaryCoverageJson> for BinaryCoverage {
     fn try_from(json: BinaryCoverageJson) -> Result<Self> {
         let mut process = BinaryCoverage::default();
 
-        for (module, offsets) in json.modules {
+        for (path, module) in json.modules {
             let mut coverage = ModuleBinaryCoverage::default();
 
-            for (hex, count) in offsets {
+            for (hex, count) in module.blocks {
                 let offset = Offset(hex.0);
                 coverage.offsets.insert(offset, Count(count));
             }
 
-            let path = FilePath::new(module)?;
+            let path = FilePath::new(path)?;
             process.modules.insert(path, coverage);
         }
 

src/agent/onefuzz-file-format/tests/files/binary-coverage.v0.json

@@ -0,0 +1,32 @@
+[
+  {
+    "module": "/setup/main.exe",
+    "blocks": [
+      {
+        "offset": 1,
+        "count": 0
+      },
+      {
+        "offset": 300,
+        "count": 1
+      },
+      {
+        "offset": 5000,
+        "count": 0
+      }
+    ]
+  },
+  {
+    "module": "/setup/lib/some.dll",
+    "blocks": [
+      {
+        "offset": 123,
+        "count": 0
+      },
+      {
+        "offset": 456,
+        "count": 10
+      }
+    ]
+  }
+]

src/agent/onefuzz-file-format/tests/files/binary-coverage.v1.json

@@ -0,0 +1,15 @@
+{
+    "/setup/main.exe": {
+        "blocks": {
+            "1": 0,
+            "12c": 1,
+            "1388": 0
+        }
+    },
+    "/setup/lib/some.dll": {
+        "blocks": {
+            "7b": 0,
+            "1c8": 10
+        }
+    }
+}

src/agent/onefuzz-file-format/tests/integration.rs

@@ -0,0 +1,45 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+use pretty_assertions::assert_eq;
+
+use anyhow::Result;
+use coverage::binary::{BinaryCoverage, Count, FilePath, ModuleBinaryCoverage, Offset};
+use onefuzz_file_format::coverage::binary::{v0, v1};
+
+fn expected_binary_coverage() -> Result<BinaryCoverage> {
+    let main_exe_path = FilePath::new("/setup/main.exe")?;
+    let some_dll_path = FilePath::new("/setup/lib/some.dll")?;
+
+    let mut main_exe = ModuleBinaryCoverage::default();
+    main_exe.offsets.insert(Offset(1), Count(0));
+    main_exe.offsets.insert(Offset(300), Count(1));
+    main_exe.offsets.insert(Offset(5000), Count(0));
+
+    let mut some_dll = ModuleBinaryCoverage::default();
+    some_dll.offsets.insert(Offset(123), Count(0));
+    some_dll.offsets.insert(Offset(456), Count(10));
+
+    let mut binary = BinaryCoverage::default();
+    binary.modules.insert(some_dll_path, some_dll);
+    binary.modules.insert(main_exe_path, main_exe);
+
+    Ok(binary)
+}
+
+#[test]
+fn test_binary_coverage_formats() -> Result<()> {
+    let expected = expected_binary_coverage()?;
+
+    let v0_text = include_str!("files/binary-coverage.v0.json");
+    let v0_json: v0::BinaryCoverageJson = serde_json::from_str(v0_text)?;
+    let from_v0 = BinaryCoverage::try_from(v0_json)?;
+    assert_eq!(from_v0, expected);
+
+    let v1_text = include_str!("files/binary-coverage.v1.json");
+    let v1_json: v1::BinaryCoverageJson = serde_json::from_str(v1_text)?;
+    let from_v1 = BinaryCoverage::try_from(v1_json)?;
+    assert_eq!(from_v1, expected);
+
+    Ok(())
+}