add debug info item

androscalpel_serializer/src/debug.rs

@@ -0,0 +1,94 @@
+//! Debug structs
+
+use crate as androscalpel_serializer;
+use crate::{ReadSeek, Result, Serializable, SerializableUntil, Sleb128, Uleb128, Uleb128p1};
+use std::io::Write;
+
+/// https://source.android.com/docs/core/runtime/dex-format#debug-info-item
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub struct DebugInfoItem {
+    pub line_start: Uleb128,
+    //pub parameters_size: Uleb128,
+    pub parameter_names: Vec<Uleb128p1>,
+    /// List of opcode. Notice that the trailling [`DbgBytecode::EndSequence`]
+    /// is not stored in this vec.
+    pub bytecode: Vec<DbgBytecode>,
+}
+
+#[derive(Serializable, Debug, PartialEq, Eq, Copy, Clone)]
+#[prefix_type(u8)]
+pub enum DbgBytecode {
+    #[prefix(0x00)]
+    EndSequence,
+    #[prefix(0x01)]
+    AdvancePC { addr_diff: Uleb128 },
+    #[prefix(0x02)]
+    AdvanceLine { line_diff: Sleb128 },
+    #[prefix(0x03)]
+    StartLocal {
+        register_num: Uleb128,
+        name_idx: Uleb128p1,
+        type_idx: Uleb128p1,
+    },
+    #[prefix(0x04)]
+    StartLocalExtended {
+        register_num: Uleb128,
+        name_idx: Uleb128p1,
+        type_idx: Uleb128p1,
+        sig_idx: Uleb128p1,
+    },
+    #[prefix(0x05)]
+    EndLocal { register_num: Uleb128 },
+    #[prefix(0x06)]
+    RestartLocal { register_num: Uleb128 },
+    #[prefix(0x07)]
+    SetPrologueEnd,
+    #[prefix(0x08)]
+    SetEpilogueBegin,
+    #[prefix(0x09)]
+    SetFile { name_idx: Uleb128p1 },
+    #[default_variant]
+    SpecialOpcode(u8),
+}
+
+impl DebugInfoItem {
+    pub fn parameters_size_field(&self) -> Uleb128 {
+        Uleb128(self.parameter_names.len() as u32)
+    }
+}
+
+impl Serializable for DebugInfoItem {
+    fn serialize(&self, output: &mut dyn Write) -> Result<()> {
+        self.line_start.serialize(output)?;
+        self.parameters_size_field().serialize(output)?;
+        for item in &self.parameter_names {
+            item.serialize(output)?;
+        }
+        self.bytecode.serialize(output, DbgBytecode::EndSequence)?;
+        Ok(())
+    }
+    fn deserialize(input: &mut dyn ReadSeek) -> Result<Self> {
+        let line_start = Uleb128::deserialize(input)?;
+        let Uleb128(parameters_size) = Uleb128::deserialize(input)?;
+        let mut parameter_names = vec![];
+        for _ in 0..parameters_size {
+            parameter_names.push(Uleb128p1::deserialize(input)?);
+        }
+        let bytecode = Vec::<DbgBytecode>::deserialize(input, DbgBytecode::EndSequence)?;
+        Ok(Self {
+            line_start,
+            parameter_names,
+            bytecode,
+        })
+    }
+    fn size(&self) -> usize {
+        self.line_start.size()
+            + self.parameters_size_field().size()
+            + self
+                .parameter_names
+                .iter()
+                .map(|param| param.size())
+                .sum::<usize>()
+            + self.bytecode.size(DbgBytecode::EndSequence)
+    }
+}

androscalpel_serializer/src/lib.rs

@@ -2,6 +2,7 @@ pub mod annotation;
 pub mod array;
 pub mod constant;
 pub mod core;
+pub mod debug;
 pub mod items;
 pub mod value;
 
@@ -11,5 +12,6 @@ pub use crate::core::*;
 pub use annotation::*;
 pub use array::*;
 pub use constant::*;
+pub use debug::*;
 pub use items::*;
 pub use value::*;