Revert "[libc] Fix readlink tests on 32-bit systems" (#97852)

Reverts #97850 while I investigate the buildbot issue

Author: mikhailramalho

libc/test/src/unistd/CMakeLists.txt

@@ -262,7 +262,6 @@ add_libc_unittest(
     libc.include.unistd
     libc.src.errno.errno
     libc.src.unistd.readlink
-    libc.src.string.string_utils
     libc.src.unistd.symlink
     libc.src.unistd.unlink
     libc.src.__support.CPP.string_view
@@ -279,7 +278,6 @@ add_libc_unittest(
     libc.include.fcntl
     libc.include.unistd
     libc.src.errno.errno
-    libc.src.string.string_utils
     libc.src.unistd.readlinkat
     libc.src.unistd.symlink
     libc.src.unistd.unlink

libc/test/src/unistd/readlink_test.cpp

@@ -9,7 +9,6 @@
 #include "src/__support/CPP/string_view.h"
 #include "src/errno/libc_errno.h"
 #include "src/unistd/readlink.h"
-#include "src/string/string_utils.h"
 #include "src/unistd/symlink.h"
 #include "src/unistd/unlink.h"
 #include "test/UnitTest/ErrnoSetterMatcher.h"
@@ -31,9 +30,8 @@ TEST(LlvmLibcReadlinkTest, CreateAndUnlink) {
   //   3. Cleanup the symlink created in step #1.
   ASSERT_THAT(LIBC_NAMESPACE::symlink(LINK_VAL, LINK), Succeeds(0));
 
-  char buf[sizeof(FILENAME)];
-  ssize_t len = LIBC_NAMESPACE::readlink(
-      LINK, buf, LIBC_NAMESPACE::internal::string_length(FILENAME));
+  char buf[sizeof(LINK_VAL)];
+  ssize_t len = LIBC_NAMESPACE::readlink(LINK, buf, sizeof(buf));
   ASSERT_ERRNO_SUCCESS();
   ASSERT_EQ(cpp::string_view(buf, len), cpp::string_view(LINK_VAL));
 
@@ -42,8 +40,7 @@ TEST(LlvmLibcReadlinkTest, CreateAndUnlink) {
 
 TEST(LlvmLibcReadlinkTest, ReadlinkInNonExistentPath) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
-  constexpr auto len = 8;
-  char buf[len];
-  ASSERT_THAT(LIBC_NAMESPACE::readlink("non-existent-link", buf, len),
+  char buf[8];
+  ASSERT_THAT(LIBC_NAMESPACE::readlink("non-existent-link", buf, sizeof(buf)),
               Fails(ENOENT));
 }

libc/test/src/unistd/readlinkat_test.cpp

@@ -9,7 +9,6 @@
 #include "src/__support/CPP/string_view.h"
 #include "src/errno/libc_errno.h"
 #include "src/unistd/readlinkat.h"
-#include "src/string/string_utils.h"
 #include "src/unistd/symlink.h"
 #include "src/unistd/unlink.h"
 #include "test/UnitTest/ErrnoSetterMatcher.h"
@@ -33,9 +32,8 @@ TEST(LlvmLibcReadlinkatTest, CreateAndUnlink) {
   //   3. Cleanup the symlink created in step #1.
   ASSERT_THAT(LIBC_NAMESPACE::symlink(LINK_VAL, LINK), Succeeds(0));
 
-  char buf[sizeof(FILENAME)];
-  ssize_t len = LIBC_NAMESPACE::readlinkat(
-      AT_FDCWD, LINK, buf, LIBC_NAMESPACE::internal::string_length(FILENAME));
+  char buf[sizeof(LINK_VAL)];
+  ssize_t len = LIBC_NAMESPACE::readlinkat(AT_FDCWD, LINK, buf, sizeof(buf));
   ASSERT_ERRNO_SUCCESS();
   ASSERT_EQ(cpp::string_view(buf, len), cpp::string_view(LINK_VAL));
 
@@ -44,9 +42,8 @@ TEST(LlvmLibcReadlinkatTest, CreateAndUnlink) {
 
 TEST(LlvmLibcReadlinkatTest, ReadlinkInNonExistentPath) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
-  constexpr auto len = 8;
-  char buf[len];
-  ASSERT_THAT(
-      LIBC_NAMESPACE::readlinkat(AT_FDCWD, "non-existent-link", buf, len),
-      Fails(ENOENT));
+  char buf[8];
+  ASSERT_THAT(LIBC_NAMESPACE::readlinkat(AT_FDCWD, "non-existent-link", buf,
+                                         sizeof(buf)),
+              Fails(ENOENT));
 }