[DeviceSanitizers] Adjust backtrace addresses to call instruction (#17404)

`backtrace()` would return buffers with return addresses, which is one
instruction past the call. If that instruction belongs to other source
lines, then the llvm-symbolizer would give out wrong result.
Test will be added internally. It is hard to write test for this using
SYCL as SYCL does not generate code with that pattern.

Author: yingcong-wu

unified-runtime/source/loader/layers/sanitizer/sanitizer_common/linux/backtrace.cpp

@@ -13,6 +13,7 @@
 #include "sanitizer_common/sanitizer_stacktrace.hpp"
 
 #include <execinfo.h>
+#include <stdint.h>
 #include <string>
 
 namespace ur_sanitizer_layer {
@@ -21,9 +22,15 @@ StackTrace GetCurrentBacktrace() {
   BacktraceFrame Frames[MAX_BACKTRACE_FRAMES];
   int FrameCount = backtrace(Frames, MAX_BACKTRACE_FRAMES);
 
+  // The Frames contain the return addresses, which is one instruction after the
+  // call instruction. Adjust the addresses so that symbolizer would give more
+  // precise result.
+  for (int I = 0; I < FrameCount; I++) {
+    Frames[I] = (void *)((uintptr_t)Frames[I] - 1);
+  }
+
   StackTrace Stack;
-  Stack.stack =
-      std::vector<BacktraceFrame>(&Frames[0], &Frames[FrameCount - 1]);
+  Stack.stack = std::vector<BacktraceFrame>(&Frames[0], &Frames[FrameCount]);
 
   return Stack;
 }