[libc] Revert #73704 and subsequent fixes #73984, #74026

SchrodingerZhu · SchrodingerZhu · commit 05f7f812944a · 2023-12-04T13:38:23.000-05:00
The test cases of mincore require getting correct page size from OS. As `sysconf` is not functioning correctly, these patches are implemented in a somewhat confusing way. We revert such patches and will reintroduce mincore after we correct sysconf. This reverts 54878b8, 985c0d1 and 418a3a4.
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
@@ -136,7 +136,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.sys.mman.mprotect
     libc.src.sys.mman.munmap
     libc.src.sys.mman.posix_madvise
-    libc.src.sys.mman.mincore
 
     # sys/random.h entrypoints
     libc.src.sys.random.getrandom
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
@@ -142,7 +142,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.sys.mman.mprotect
     libc.src.sys.mman.munmap
     libc.src.sys.mman.posix_madvise
-    libc.src.sys.mman.mincore
 
     # sys/random.h entrypoints
     libc.src.sys.random.getrandom
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
@@ -142,7 +142,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.sys.mman.mprotect
     libc.src.sys.mman.munmap
     libc.src.sys.mman.posix_madvise
-    libc.src.sys.mman.mincore
 
     # sys/random.h entrypoints
     libc.src.sys.random.getrandom
diff --git a/libc/spec/linux.td b/libc/spec/linux.td
@@ -76,20 +76,7 @@ def Linux : StandardSpec<"Linux"> {
 
   HeaderSpec SysMMan = HeaderSpec<
       "sys/mman.h",
-      [Macro<"MAP_ANONYMOUS">],
-      [], // Types
-      [], // Enumerations
-      [
-        FunctionSpec<
-            "mincore",
-            RetValSpec<IntType>,
-            [
-              ArgSpec<VoidPtr>,
-              ArgSpec<SizeTType>,
-              ArgSpec<UnsignedCharPtr>,
-            ]
-        >,
-      ]  // Functions
+      [Macro<"MAP_ANONYMOUS">]
   >;
 
 
diff --git a/libc/spec/spec.td b/libc/spec/spec.td
@@ -49,7 +49,6 @@ def FloatType : NamedType<"float">;
 def DoubleType : NamedType<"double">;
 def LongDoubleType : NamedType<"long double">;
 def CharType : NamedType<"char">;
-def UnsignedCharType : NamedType<"unsigned char">;
 
 // TODO: Add compatibility layer to use C23 type _Float128 if possible.
 def Float128Type : NamedType<"__float128">;
@@ -110,7 +109,6 @@ def IntPtr : PtrType<IntType>;
 def RestrictedIntPtr : RestrictedPtrType<IntType>;
 def FloatPtr : PtrType<FloatType>;
 def DoublePtr : PtrType<DoubleType>;
-def UnsignedCharPtr : PtrType<UnsignedCharType>;
 
 def SigHandlerT : NamedType<"__sighandler_t">;
 
diff --git a/libc/src/sys/mman/CMakeLists.txt b/libc/src/sys/mman/CMakeLists.txt
@@ -36,10 +36,3 @@ add_entrypoint_object(
   DEPENDS
     .${LIBC_TARGET_OS}.posix_madvise
 )
-
-add_entrypoint_object(
-  mincore
-  ALIAS
-  DEPENDS
-    .${LIBC_TARGET_OS}.mincore
-)
diff --git a/libc/src/sys/mman/linux/CMakeLists.txt b/libc/src/sys/mman/linux/CMakeLists.txt
@@ -61,16 +61,3 @@ add_entrypoint_object(
     libc.include.sys_syscall
     libc.src.__support.OSUtil.osutil
 )
-
-add_entrypoint_object(
-  mincore
-  SRCS
-    mincore.cpp
-  HDRS
-    ../mincore.h
-  DEPENDS
-    libc.include.sys_mman
-    libc.include.sys_syscall
-    libc.src.__support.OSUtil.osutil
-    libc.src.errno.errno
-)
diff --git a/libc/src/sys/mman/linux/mincore.cpp b/libc/src/sys/mman/linux/mincore.cpp
diff --git a/libc/src/sys/mman/mincore.h b/libc/src/sys/mman/mincore.h
diff --git a/libc/test/src/sys/mman/linux/CMakeLists.txt b/libc/test/src/sys/mman/linux/CMakeLists.txt
@@ -62,20 +62,3 @@ add_libc_unittest(
     libc.src.sys.mman.posix_madvise
     libc.test.UnitTest.ErrnoSetterMatcher
 )
-
-add_libc_unittest(
-  mincore_test
-  SUITE
-    libc_sys_mman_unittests
-  SRCS
-    mincore_test.cpp
-  DEPENDS
-    libc.include.sys_mman
-    libc.src.errno.errno
-    libc.src.sys.mman.mmap
-    libc.src.sys.mman.munmap
-    libc.src.sys.mman.madvise
-    libc.src.sys.mman.mincore
-    libc.src.unistd.sysconf
-    libc.test.UnitTest.ErrnoSetterMatcher
-)
diff --git a/libc/test/src/sys/mman/linux/mincore_test.cpp b/libc/test/src/sys/mman/linux/mincore_test.cpp
