deps: update zlib to upstream 8603eee

Updated as described in doc/guides/maintaining-zlib.md.

deps/zlib/BUILD.gn

@@ -4,6 +4,10 @@
 
 import("//build/config/compiler/compiler.gni")
 
+if (build_with_chromium) {
+  import("//testing/test.gni")
+}
+
 if (current_cpu == "arm" || current_cpu == "arm64") {
   import("//build/config/arm.gni")
 }
@@ -14,10 +18,18 @@ config("zlib_config") {
 
 config("zlib_internal_config") {
   defines = [ "ZLIB_IMPLEMENTATION" ]
+
+  if (!is_debug) {
+    # Build code using -O3, see: crbug.com/1084371.
+    configs = [ "//build/config/compiler:optimize_speed" ]
+  }
 }
 
 use_arm_neon_optimizations = false
-if (current_cpu == "arm" || current_cpu == "arm64") {
+if ((current_cpu == "arm" || current_cpu == "arm64") &&
+    !(is_win && !is_clang)) {
+  # TODO(richard.townsend@arm.com): Optimizations temporarily disabled for
+  # Windows on Arm MSVC builds, see http://crbug.com/v8/10012.
   if (arm_use_neon) {
     use_arm_neon_optimizations = true
   }
@@ -29,6 +41,11 @@ use_x86_x64_optimizations =
 config("zlib_adler32_simd_config") {
   if (use_x86_x64_optimizations) {
     defines = [ "ADLER32_SIMD_SSSE3" ]
+    if (is_win) {
+      defines += [ "X86_WINDOWS" ]
+    } else {
+      defines += [ "X86_NOT_WINDOWS" ]
+    }
   }
 
   if (use_arm_neon_optimizations) {
@@ -55,11 +72,6 @@ source_set("zlib_adler32_simd") {
       "adler32_simd.c",
       "adler32_simd.h",
     ]
-    if (!is_debug) {
-      # Use optimize_speed (-O3) to output the _smallest_ code.
-      configs -= [ "//build/config/compiler:default_optimization" ]
-      configs += [ "//build/config/compiler:optimize_speed" ]
-    }
   }
 
   configs += [ ":zlib_internal_config" ]
@@ -78,6 +90,8 @@ if (use_arm_neon_optimizations) {
         defines += [ "ARMV8_OS_ANDROID" ]
       } else if (is_linux || is_chromeos) {
         defines += [ "ARMV8_OS_LINUX" ]
+      } else if (is_mac) {
+        defines += [ "ARMV8_OS_MACOS" ]
       } else if (is_fuchsia) {
         defines += [ "ARMV8_OS_FUCHSIA" ]
       } else if (is_win) {
@@ -94,32 +108,16 @@ if (use_arm_neon_optimizations) {
     if (!is_ios) {
       include_dirs = [ "." ]
 
-      if (is_android) {
-        import("//build/config/android/config.gni")
-        if (defined(android_ndk_root) && android_ndk_root != "") {
-          deps = [
-            "//third_party/android_ndk:cpu_features",
-          ]
-        } else {
-          assert(false, "CPU detection requires the Android NDK")
-        }
-      } else if (!is_win && !is_clang) {
+      if (!is_win && !is_clang) {
         assert(!use_thin_lto,
                "ThinLTO fails mixing different module-level targets")
         cflags_c = [ "-march=armv8-a+crc" ]
       }
 
       sources = [
-        "arm_features.c",
-        "arm_features.h",
         "crc32_simd.c",
         "crc32_simd.h",
       ]
-
-      if (!is_debug) {
-        configs -= [ "//build/config/compiler:default_optimization" ]
-        configs += [ "//build/config/compiler:optimize_speed" ]
-      }
     }
 
     configs += [ ":zlib_internal_config" ]
@@ -139,6 +137,7 @@ config("zlib_inflate_chunk_simd_config") {
 
   if (use_arm_neon_optimizations) {
     defines = [ "INFLATE_CHUNK_SIMD_NEON" ]
+
     if (current_cpu == "arm64") {
       defines += [ "INFLATE_CHUNK_READ_64LE" ]
     }
@@ -157,20 +156,14 @@ source_set("zlib_inflate_chunk_simd") {
       "contrib/optimizations/inffast_chunk.h",
       "contrib/optimizations/inflate.c",
     ]
-
-    if (use_arm_neon_optimizations && !is_debug) {
-      # Here we trade better performance on newer/bigger ARMv8 cores
-      # for less perf on ARMv7, per crbug.com/772870#c40
-      configs -= [ "//build/config/compiler:default_optimization" ]
-      configs += [ "//build/config/compiler:optimize_speed" ]
-    }
   }
 
+  configs += [ ":zlib_internal_config" ]
+
+  # Needed for MSVC, which is still supported by V8 and PDFium. zlib uses K&R C
+  # style function declarations, which triggers warning C4131.
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [
-    ":zlib_internal_config",
-    "//build/config/compiler:no_chromium_code",
-  ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
 
   public_configs = [ ":zlib_inflate_chunk_simd_config" ]
 }
@@ -203,6 +196,15 @@ source_set("zlib_crc32_simd") {
   public_configs = [ ":zlib_crc32_simd_config" ]
 }
 
+config("zlib_x86_simd_config") {
+  if (use_x86_x64_optimizations) {
+    defines = [
+      "CRC32_SIMD_SSE42_PCLMUL",
+      "DEFLATE_FILL_WINDOW_SSE2",
+    ]
+  }
+}
+
 source_set("zlib_x86_simd") {
   visibility = [ ":*" ]
 
@@ -218,17 +220,11 @@ source_set("zlib_x86_simd") {
         "-mpclmul",
       ]
     }
-  } else {
-    sources = [
-      "simd_stub.c",
-    ]
   }
 
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [
-    ":zlib_internal_config",
-    "//build/config/compiler:no_chromium_code",
-  ]
+  configs += [ ":zlib_internal_config" ]
+
+  public_configs = [ ":zlib_x86_simd_config" ]
 }
 
 config("zlib_warnings") {
@@ -248,6 +244,8 @@ component("zlib") {
     "chromeconf.h",
     "compress.c",
     "contrib/optimizations/insert_string.h",
+    "cpu_features.c",
+    "cpu_features.h",
     "crc32.c",
     "crc32.h",
     "deflate.c",
@@ -267,7 +265,6 @@ component("zlib") {
     "trees.c",
     "trees.h",
     "uncompr.c",
-    "x86.h",
     "zconf.h",
     "zlib.h",
     "zutil.c",
@@ -277,14 +274,27 @@ component("zlib") {
   defines = []
   deps = []
 
+  if (!use_x86_x64_optimizations && !use_arm_neon_optimizations) {
+    # Apparently android_cronet bot builds with NEON disabled and
+    # we also should disable optimizations for iOS@x86 (a.k.a. simulator).
+    defines += [ "CPU_NO_SIMD" ]
+  }
+
+  if (is_ios) {
+    # iOS@ARM is a special case where we always have NEON but don't check
+    # for crypto extensions.
+    # TODO(cavalcantii): verify what is the current state of CPU features
+    # shipped on latest iOS devices.
+    defines += [ "ARM_OS_IOS" ]
+  }
+
   if (use_x86_x64_optimizations || use_arm_neon_optimizations) {
     deps += [
       ":zlib_adler32_simd",
       ":zlib_inflate_chunk_simd",
     ]
 
     if (use_x86_x64_optimizations) {
-      sources += [ "x86.c" ]
       deps += [ ":zlib_crc32_simd" ]
     } else if (use_arm_neon_optimizations) {
       sources += [ "contrib/optimizations/slide_hash_neon.h" ]
@@ -294,18 +304,29 @@ component("zlib") {
     sources += [ "inflate.c" ]
   }
 
+  deps += [ ":zlib_x86_simd" ]
+
+  if (is_android) {
+    import("//build/config/android/config.gni")
+    if (defined(android_ndk_root) && android_ndk_root != "") {
+      deps += [ "//third_party/android_ndk:cpu_features" ]
+    } else {
+      assert(false, "CPU detection requires the Android NDK")
+    }
+  }
+
   configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
+  public_configs = [ ":zlib_config" ]
+
   configs += [
     ":zlib_internal_config",
-    "//build/config/compiler:no_chromium_code",
 
     # Must be after no_chromium_code for warning flags to be ordered correctly.
     ":zlib_warnings",
   ]
 
-  public_configs = [ ":zlib_config" ]
-
-  deps += [ ":zlib_x86_simd" ]
   allow_circular_includes_from = deps
 }
 
@@ -343,37 +364,56 @@ static_library("minizip") {
     defines = [ "USE_FILE32API" ]
   }
 
-  deps = [
-    ":zlib",
-  ]
+  deps = [ ":zlib" ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [
-    "//build/config/compiler:no_chromium_code",
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
+  public_configs = [ ":zlib_config" ]
 
+  configs += [
     # Must be after no_chromium_code for warning flags to be ordered correctly.
     ":minizip_warnings",
   ]
-
-  public_configs = [ ":zlib_config" ]
 }
 
 executable("zlib_bench") {
   include_dirs = [ "." ]
 
-  sources = [
-    "contrib/bench/zlib_bench.cc",
-  ]
-
+  sources = [ "contrib/bench/zlib_bench.cc" ]
   if (!is_debug) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_speed" ]
   }
 
+  deps = [ ":zlib" ]
+
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
+}
 
-  deps = [
-    ":zlib",
-  ]
+if (build_with_chromium) {
+  test("zlib_unittests") {
+    testonly = true
+
+    sources = [
+      "contrib/tests/infcover.cc",
+      "contrib/tests/infcover.h",
+      "contrib/tests/utils_unittest.cc",
+      "google/compression_utils_portable.cc",
+      "google/compression_utils_portable.h",
+    ]
+
+    deps = [
+      ":zlib",
+      "//testing/gtest",
+      "//testing/gtest:gtest_main",
+    ]
+
+    include_dirs = [
+      "//third_party/googletest/src/googletest/include/gtest",
+      ".",
+      "google",
+    ]
+  }
 }

deps/zlib/DEPS

@@ -0,0 +1,3 @@
+include_rules = [
+    "+testing/gtest",
+]

deps/zlib/OWNERS

@@ -1,7 +1,7 @@
 agl@chromium.org
 cavalcantii@chromium.org
 cblume@chromium.org
-mtklein@chromium.org
-scroggo@chromium.org
+mtklein@google.com
+scroggo@google.com
 
 # COMPONENT: Internals

deps/zlib/README.chromium

@@ -2,6 +2,7 @@ Name: zlib
 Short Name: zlib
 URL: http://zlib.net/
 Version: 1.2.11
+CPEPrefix: cpe:/a:zlib:zlib:1.2.11
 Security Critical: yes
 License: Custom license
 License File: LICENSE

deps/zlib/adler32.c

@@ -59,10 +59,8 @@ local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
 #  define MOD63(a) a %= BASE
 #endif
 
-#if defined(ADLER32_SIMD_SSSE3)
-#include "adler32_simd.h"
-#include "x86.h"
-#elif defined(ADLER32_SIMD_NEON)
+#include "cpu_features.h"
+#if defined(ADLER32_SIMD_SSSE3) || defined(ADLER32_SIMD_NEON)
 #include "adler32_simd.h"
 #endif
 
@@ -108,7 +106,7 @@ uLong ZEXPORT adler32_z(adler, buf, len)
      */
     if (buf == Z_NULL) {
         if (!len) /* Assume user is calling adler32(0, NULL, 0); */
-            x86_check_features();
+            cpu_check_features();
         return 1L;
     }
 #else

deps/zlib/adler32_simd.c

@@ -50,13 +50,9 @@
 #define NMAX 5552
 
 #if defined(ADLER32_SIMD_SSSE3)
-#ifndef __GNUC__
-#define __attribute__()
-#endif
 
 #include <tmmintrin.h>
 
-__attribute__((target("ssse3")))
 uint32_t ZLIB_INTERNAL adler32_simd_(  /* SSSE3 */
     uint32_t adler,
     const unsigned char *buf,

deps/zlib/chromeconf.h

@@ -192,4 +192,8 @@
 #define arm_check_features Cr_z_arm_check_features
 #define armv8_crc32_little Cr_z_armv8_crc32_little
 
+/* Symbols added by cpu_features.c */
+#define cpu_check_features Cr_z_cpu_check_features
+#define x86_cpu_enable_sse2 Cr_z_x86_cpu_enable_sse2
+
 #endif /* THIRD_PARTY_ZLIB_CHROMECONF_H_ */