[hwasan] Respect strip_path_prefix printing locals (#76132)

compiler-rt/lib/hwasan/hwasan_report.cpp

@@ -205,6 +205,7 @@ static void PrintStackAllocations(const StackAllocationsRingBuffer *sa,
                                   tag_t addr_tag, uptr untagged_addr) {
   uptr frames = Min((uptr)flags()->stack_history_size, sa->size());
   bool found_local = false;
+  InternalScopedString location;
   for (uptr i = 0; i < frames; i++) {
     const uptr *record_addr = &(*sa)[i];
     uptr record = *record_addr;
@@ -236,8 +237,13 @@ static void PrintStackAllocations(const StackAllocationsRingBuffer *sa,
           Printf("\nPotentially referenced stack objects:\n");
           found_local = true;
         }
-        Printf("  %s in %s %s:%d\n", local.name, local.function_name,
-               local.decl_file, local.decl_line);
+        StackTracePrinter::GetOrInit()->RenderSourceLocation(
+            &location, local.decl_file, local.decl_line, /* column= */ 0,
+            common_flags()->symbolize_vs_style,
+            common_flags()->strip_path_prefix);
+        Printf("  %s in %s %s\n", local.name, local.function_name,
+               location.data());
+        location.clear();
       }
       frame.Clear();
     }

compiler-rt/test/hwasan/TestCases/strip_path_prefix.c

@@ -0,0 +1,27 @@
+// RUN: %clang_hwasan -O0 %s -o %t && %env_hwasan_opts=strip_path_prefix='"%S/"' not %run %t 2>&1 | FileCheck %s
+
+// Stack histories currently are not recorded on x86.
+// XFAIL: target=x86_64{{.*}}
+
+#include <assert.h>
+#include <sanitizer/hwasan_interface.h>
+#include <stdio.h>
+
+int t;
+
+__attribute__((noinline)) char *buggy() {
+  char *volatile p;
+  char zzz = {};
+  char yyy = {};
+  p = t ? &yyy : &zzz;
+  return p;
+}
+
+int main() {
+  char *p = buggy();
+  return *p;
+  // CHECK: READ of size 1 at
+  // CHECK: #0 {{.*}} in main strip_path_prefix.c:[[@LINE-2]]
+  // CHECK: Potentially referenced stack objects:
+  // CHECK: zzz in buggy strip_path_prefix.c:[[@LINE-12]]
+}