Fix segfault in 1.77.0+

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
     strategy:
       matrix:
         job:
-          - { os: ubuntu-22.04, target: x86_64-unknown-linux-gnu }
+          - { os: ubuntu-22.04, target: x86_64-unknown-linux-gnu, release: true }
           - { os: ubuntu-22.04,  target: x86_64-unknown-linux-musl }
           - { os: windows-2022,  target: x86_64-pc-windows-msvc }
           - { os: macos-13,      target: x86_64-apple-darwin }
@@ -49,6 +49,11 @@ jobs:
         run: cargo test --target ${{ matrix.job.target }} --no-run
       - name: Test
         run: cargo test --target ${{ matrix.job.target }}
+      - name: Release test
+        if: ${{ matrix.job.release }}
+        run: |
+          cargo test --target ${{ matrix.job.target }} --release --no-run
+          cargo test --target ${{ matrix.job.target }} --release
 
   install-cross:
     runs-on: ubuntu-latest

src/linux/thread_info.rs

@@ -37,20 +37,18 @@ enum NT_Elf {
     NT_ARM_VFP = 0x400, // ARM VFP/NEON registers
 }
 
-#[inline]
-pub fn to_u128(slice: &[u32]) -> &[u128] {
-    unsafe { std::slice::from_raw_parts(slice.as_ptr().cast(), slice.len().saturating_div(4)) }
-}
-
-#[inline]
-pub fn copy_registers(dst: &mut [u128], src: &[u128]) {
-    let to_copy = std::cmp::min(dst.len(), src.len());
-    dst[..to_copy].copy_from_slice(&src[..to_copy]);
-}
-
 #[inline]
 pub fn copy_u32_registers(dst: &mut [u128], src: &[u32]) {
-    copy_registers(dst, to_u128(src));
+    // SAFETY: We are copying a block of memory from ptrace as u32s to the u128
+    // format of minidump-common
+    unsafe {
+        let dst: &mut [u8] =
+            std::slice::from_raw_parts_mut(dst.as_mut_ptr().cast(), dst.len() * 16);
+        let src: &[u8] = std::slice::from_raw_parts(src.as_ptr().cast(), src.len() * 4);
+
+        let to_copy = std::cmp::min(dst.len(), src.len());
+        dst[..to_copy].copy_from_slice(&src[..to_copy]);
+    }
 }
 
 trait CommonThreadInfo {