wrapping_add

tokatoka · tokatoka · commit d0c6d062301e · 2021-07-26T12:03:56.000+09:00
diff --git a/libafl_targets/src/sancov_pcguard.rs b/libafl_targets/src/sancov_pcguard.rs
@@ -23,8 +23,8 @@ pub unsafe extern "C" fn __sanitizer_cov_trace_pc_guard(guard: *mut u32) {
     }
     #[cfg(feature = "sancov_pcguard_hitcounts")]
     {
-        let val = (EDGES_MAP_PTR as *mut u8).add(pos).read();
-        (EDGES_MAP_PTR as *mut u8).add(pos).write(val + 1);
+        let val = (EDGES_MAP_PTR as *mut u8).add(pos).read().wrapping_add(1);
+        (EDGES_MAP_PTR as *mut u8).add(pos).write(val);
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -23,8 +23,8 @@ pub unsafe extern "C" fn __sanitizer_cov_trace_pc_guard(guard: *mut u32) {`
`23`	`23`	`}`
`24`	`24`	`#[cfg(feature = "sancov_pcguard_hitcounts")]`
`25`	`25`	`{`
`26`		`- let val = (EDGES_MAP_PTR as *mut u8).add(pos).read();`
`27`		`- (EDGES_MAP_PTR as *mut u8).add(pos).write(val + 1);`
	`26`	`+ let val = (EDGES_MAP_PTR as *mut u8).add(pos).read().wrapping_add(1);`
	`27`	`+ (EDGES_MAP_PTR as *mut u8).add(pos).write(val);`
`28`	`28`	`}`
`29`	`29`	`}`
`30`	`30`