Revert "[msan] Check qsort input."

This change breaks LLVM bootstrap with ASan and MSan.

FAILED: lib/ToolDrivers/llvm-lib/Options.inc
OptParser.td:137:1: error: Option is equivalent to
def INPUT : Option<[], "<input>", KIND_INPUT>;
^
OptParser.td:137:1: error: Other defined here
def INPUT : Option<[], "<input>", KIND_INPUT>;

This reverts commit caa48a6b88aeed8ae80e6ddb1eae8c6a7cbe260b.

1 files changed, 0 insertions, 18 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
index 68a9db5bba7..2d9636a9c87 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -9665,15 +9665,6 @@ INTERCEPTOR(void, qsort, void *base, SIZE_T nmemb, SIZE_T size,
             qsort_compar_f compar) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, qsort, base, nmemb, size, compar);
-  // Run the comparator over all array elements to detect any memory issues.
-  for (SIZE_T i = 0; i < nmemb; ++i) {
-    void *p = (void *)((char *)base + i * size);
-    COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
-    // Compare each element with itself to trigger an equality check, which
-    // typically requires the comparator to look as many of the object fields as
-    // possible.
-    compar(p, p);
-  }
   qsort_compar_f old_compar = qsort_compar;
   qsort_compar = compar;
   SIZE_T old_size = qsort_size;
@@ -9703,15 +9694,6 @@ INTERCEPTOR(void, qsort_r, void *base, SIZE_T nmemb, SIZE_T size,
             qsort_r_compar_f compar, void *arg) {
   void *ctx;
   COMMON_INTERCEPTOR_ENTER(ctx, qsort_r, base, nmemb, size, compar, arg);
-  // Run the comparator over all array elements to detect any memory issues.
-  for (SIZE_T i = 0; i < nmemb; ++i) {
-    void *p = (void *)((char *)base + i * size);
-    COMMON_INTERCEPTOR_UNPOISON_PARAM(3);
-    // Compare each element with itself to trigger an equality check, which
-    // typically requires the comparator to look as many of the object fields as
-    // possible.
-    compar(p, p, arg);
-  }
   qsort_r_compar_f old_compar = qsort_r_compar;
   qsort_r_compar = compar;
   SIZE_T old_size = qsort_r_size;