Fix failures on Windows when more warnings are enabled.

src/libraries/Native/Windows/System.IO.Compression.Native/zlib-intel/inflate.c

@@ -1540,7 +1540,7 @@ z_streamp source;
     struct inflate_state FAR *state;
     struct inflate_state FAR *copy;
     unsigned char FAR *window;
-    unsigned wsize;
+    unsigned wsize = 0;
 
     /* check input */
     if (inflateStateCheck(source) || dest == Z_NULL)

src/native/corehost/bundle/extractor.cpp

@@ -14,8 +14,8 @@ pal::string_t& extractor_t::extraction_dir()
     if (m_extraction_dir.empty())
     {
         // Compute the final extraction location as:
-        // m_extraction_dir = $DOTNET_BUNDLE_EXTRACT_BASE_DIR/<app>/<id>/...	
-        //	
+        // m_extraction_dir = $DOTNET_BUNDLE_EXTRACT_BASE_DIR/<app>/<id>/...
+        //
         // If DOTNET_BUNDLE_EXTRACT_BASE_DIR is not set in the environment, 
         // a default is choosen within the temporary directory.
 
@@ -103,9 +103,9 @@ void extractor_t::extract(const file_entry_t &entry, reader_t &reader)
 {
     FILE* file = create_extraction_file(entry.relative_path());
     reader.set_offset(entry.offset());
-    size_t size = entry.size();
-
-    if (fwrite(reader, 1, size, file) != size)
+    int64_t size = entry.size();
+    size_t cast_size = to_size_t_dbgchecked(size);
+    if (fwrite(reader, 1, cast_size, file) != cast_size)
     {
         trace::error(_X("Failure extracting contents of the application bundle."));
         trace::error(_X("I/O failure when writing extracted files."));

src/native/corehost/bundle/reader.h

@@ -6,6 +6,7 @@
 
 #include <cstdint>
 #include "pal.h"
+#include "utils.h"
 
 namespace bundle
 {
@@ -40,7 +41,7 @@ namespace bundle
         void read(void* dest, int64_t len)
         {
             bounds_check(len);
-            memcpy(dest, m_ptr, len);
+            memcpy(dest, m_ptr, to_size_t_dbgchecked(len));
             m_ptr += len;
         }
 

src/native/corehost/deps_format.cpp

@@ -45,7 +45,7 @@ void deps_json_t::reconcile_libraries_with_targets(
     const pal::string_t& deps_path,
     const json_parser_t::value_t& json,
     const std::function<bool(const pal::string_t&)>& library_exists_fn,
-    const std::function<const vec_asset_t&(const pal::string_t&, int, bool*)>& get_assets_fn)
+    const std::function<const vec_asset_t&(const pal::string_t&, size_t, bool*)>& get_assets_fn)
 {
     pal::string_t deps_file = get_filename(deps_path);
 
@@ -320,7 +320,7 @@ bool deps_json_t::load_framework_dependent(const pal::string_t& deps_path, const
     };
 
     const vec_asset_t empty;
-    auto get_relpaths = [&](const pal::string_t& package, int asset_type_index, bool* rid_specific) -> const vec_asset_t& {
+    auto get_relpaths = [&](const pal::string_t& package, size_t asset_type_index, bool* rid_specific) -> const vec_asset_t& {
 
         *rid_specific = false;
 
@@ -361,7 +361,7 @@ bool deps_json_t::load_self_contained(const pal::string_t& deps_path, const json
         return m_assets.libs.count(package);
     };
 
-    auto get_relpaths = [&](const pal::string_t& package, int type_index, bool* rid_specific) -> const vec_asset_t& {
+    auto get_relpaths = [&](const pal::string_t& package, size_t type_index, bool* rid_specific) -> const vec_asset_t& {
         *rid_specific = false;
         return m_assets.libs[package][type_index];
     };

src/native/corehost/deps_format.h

@@ -92,7 +92,7 @@ class deps_json_t
         const pal::string_t& deps_path,
         const json_parser_t::value_t& json,
         const std::function<bool(const pal::string_t&)>& library_exists_fn,
-        const std::function<const vec_asset_t&(const pal::string_t&, int, bool*)>& get_assets_fn);
+        const std::function<const vec_asset_t&(const pal::string_t&, size_t, bool*)>& get_assets_fn);
 
     pal::string_t get_current_rid(const rid_fallback_graph_t& rid_fallback_graph);
     bool perform_rid_fallback(rid_specific_assets_t* portable_assets, const rid_fallback_graph_t& rid_fallback_graph);

src/native/corehost/fxr/corehost_init.cpp

@@ -35,7 +35,7 @@ corehost_init_t::corehost_init_t(
 {
     make_cstr_arr(m_probe_paths, &m_probe_paths_cstr);
 
-    int fx_count = fx_definitions.size();
+    size_t fx_count = fx_definitions.size();
     m_fx_names.reserve(fx_count);
     m_fx_dirs.reserve(fx_count);
     m_fx_requested_versions.reserve(fx_count);
@@ -132,7 +132,12 @@ const host_interface_t& corehost_init_t::get_host_init_data()
     hi.host_info_dotnet_root = m_host_info_dotnet_root.c_str();
     hi.host_info_app_path = m_host_info_app_path.c_str();
 
-    hi.single_file_bundle_header_offset = bundle::info_t::is_single_file_bundle() ? bundle::info_t::the_app->header_offset() : 0;
+    hi.single_file_bundle_header_offset = 0;
+    if (bundle::info_t::is_single_file_bundle())
+    {
+        int64_t offset = bundle::info_t::the_app->header_offset();
+        hi.single_file_bundle_header_offset = to_size_t_dbgchecked(offset);
+    }
 
     return hi;
 }

src/native/corehost/fxr/fx_muxer.cpp

@@ -849,7 +849,7 @@ int fx_muxer_t::run_app(host_context_t *context)
     if (!context->is_app)
         return StatusCode::InvalidArgFailure;
 
-    int argc = context->argv.size();
+    size_t argc = context->argv.size();
     std::vector<const pal::char_t*> argv;
     argv.reserve(argc);
     for (const auto& str : context->argv)
@@ -863,7 +863,7 @@ int fx_muxer_t::run_app(host_context_t *context)
         if (rc != StatusCode::Success)
             return rc;
 
-        return contract.run_app(argc, argv.data());
+        return contract.run_app((int32_t)argc, argv.data());
     }
 }
 
@@ -992,7 +992,7 @@ int fx_muxer_t::handle_exec_host_command(
         vec_argv.push_back(argv[0]);
         vec_argv.insert(vec_argv.end(), argv + argoff, argv + argc);
         new_argv = vec_argv.data();
-        new_argc = vec_argv.size();
+        new_argc = (int32_t)vec_argv.size();
     }
 
     trace::info(_X("Using dotnet root path [%s]"), host_info.dotnet_root.c_str());
@@ -1083,7 +1083,7 @@ int fx_muxer_t::handle_cli(
     int new_argoff;
     pal::string_t sdk_app_candidate;
     opt_map_t opts;
-    int result = command_line::parse_args_for_sdk_command(host_info, new_argv.size(), new_argv.data(), &new_argoff, sdk_app_candidate, opts);
+    int result = command_line::parse_args_for_sdk_command(host_info, (int32_t)new_argv.size(), new_argv.data(), &new_argoff, sdk_app_candidate, opts);
     if (!result)
     {
         // Transform dotnet [exec] [--additionalprobingpath path] [--depsfile file] [dll] [args] -> dotnet [dll] [args]
@@ -1092,7 +1092,7 @@ int fx_muxer_t::handle_cli(
             host_info,
             sdk_app_candidate,
             opts,
-            new_argv.size(),
+            (int32_t)new_argv.size(),
             new_argv.data(),
             new_argoff,
             host_mode_t::muxer,

src/native/corehost/fxr/hostfxr.cpp

@@ -145,7 +145,7 @@ SHARED_API int32_t HOSTFXR_CALLTYPE hostfxr_resolve_sdk(
         return 0;
     }
 
-    unsigned long non_negative_buffer_size = static_cast<unsigned long>(buffer_size);
+    size_t non_negative_buffer_size = static_cast<size_t>(buffer_size);
     if (sdk_path.size() < non_negative_buffer_size)
     {
         size_t length = sdk_path.copy(buffer, non_negative_buffer_size - 1);
@@ -158,7 +158,7 @@ SHARED_API int32_t HOSTFXR_CALLTYPE hostfxr_resolve_sdk(
         trace::info(_X("hostfxr_resolve_sdk received a buffer that is too small to hold the located SDK path."));
     }
 
-    return sdk_path.size() + 1;
+    return static_cast<int32_t>(sdk_path.size() + 1);
 }
 
 enum hostfxr_resolve_sdk2_flags_t : int32_t
@@ -325,7 +325,7 @@ SHARED_API int32_t HOSTFXR_CALLTYPE hostfxr_get_available_sdks(
             sdk_dirs.push_back(sdk_info.full_path.c_str());
         }
 
-        result(sdk_dirs.size(), &sdk_dirs[0]);
+        result(static_cast<int32_t>(sdk_dirs.size()), &sdk_dirs[0]);
     }
 
     return StatusCode::Success;

src/native/corehost/hostmisc/pal.h

@@ -149,19 +149,28 @@ namespace pal
     inline int cstrcasecmp(const char* str1, const char* str2) { return ::_stricmp(str1, str2); }
     inline int strcmp(const char_t* str1, const char_t* str2) { return ::wcscmp(str1, str2); }
     inline int strcasecmp(const char_t* str1, const char_t* str2) { return ::_wcsicmp(str1, str2); }
-    inline int strncmp(const char_t* str1, const char_t* str2, int len) { return ::wcsncmp(str1, str2, len); }
-    inline int strncasecmp(const char_t* str1, const char_t* str2, int len) { return ::_wcsnicmp(str1, str2, len); }
+    inline int strncmp(const char_t* str1, const char_t* str2, size_t len) { return ::wcsncmp(str1, str2, len); }
+    inline int strncasecmp(const char_t* str1, const char_t* str2, size_t len) { return ::_wcsnicmp(str1, str2, len); }
     inline int pathcmp(const pal::string_t &path1, const pal::string_t &path2) { return strcasecmp(path1.c_str(), path2.c_str()); }
     inline string_t to_string(int value) { return std::to_wstring(value); }
 
     inline size_t strlen(const char_t* str) { return ::wcslen(str); }
+
+#pragma warning(suppress : 4996)  // error C4996: '_wfopen': This function or variable may be unsafe.
     inline FILE * file_open(const string_t& path, const char_t* mode) { return ::_wfopen(path.c_str(), mode); }
 
     inline void file_vprintf(FILE* f, const char_t* format, va_list vl) { ::vfwprintf(f, format, vl); ::fputwc(_X('\n'), f); }
     inline void err_fputs(const char_t* message) { ::fputws(message, stderr); ::fputwc(_X('\n'), stderr); }
     inline void out_vprintf(const char_t* format, va_list vl) { ::vfwprintf(stdout, format, vl); ::fputwc(_X('\n'), stdout); }
+
+    // This API is being used correctly and querying for needed size first.
+#pragma warning(suppress : 4996)  // error C4996: '_vsnwprintf': This function or variable may be unsafe.
     inline int str_vprintf(char_t* buffer, size_t count, const char_t* format, va_list vl) { return ::_vsnwprintf(buffer, count, format, vl); }
-    inline const char_t* strerror(int errnum) { return ::_wcserror(errnum); }
+
+    // Suppressing warning since the 'safe' version requires an input buffer that is unnecessary for
+    // uses of this function.
+#pragma warning(suppress : 4996) //  error C4996: '_wcserror': This function or variable may be unsafe.
+    inline const char_t* strerror(int errnum){ return ::_wcserror(errnum); }
 
     bool pal_utf8string(const string_t& str, std::vector<char>* out);
     bool pal_clrstring(const string_t& str, std::vector<char>* out);

src/native/corehost/hostmisc/pal.windows.cpp

@@ -49,10 +49,13 @@ pal::string_t pal::to_lower(const pal::string_t& in)
 
 pal::string_t pal::get_timestamp()
 {
-    std::time_t t = std::time(0);
+    std::time_t t = std::time(nullptr);
     const std::size_t elems = 100;
     char_t buf[elems];
-    std::wcsftime(buf, elems, _X("%c GMT"), std::gmtime(&t));
+
+    tm tm_l{};
+    ::gmtime_s(&tm_l, &t);
+    std::wcsftime(buf, elems, _X("%c GMT"), &tm_l);
 
     return pal::string_t(buf);
 }
@@ -141,7 +144,7 @@ bool pal::getcwd(pal::string_t* recv)
     {
         std::vector<pal::char_t> str;
         str.resize(result);
-        result = GetCurrentDirectoryW(str.size(), str.data());
+        result = GetCurrentDirectoryW(static_cast<uint32_t>(str.size()), str.data());
         assert(result <= str.size());
         if (result != 0)
         {
@@ -443,8 +446,8 @@ pal::string_t pal::get_current_os_rid_platform()
             if ((*pRtlGetVersion)(&osinfo) == 0)
             {
                 // Win7 RID is the minimum supported version.
-                int majorVer = 6;
-                int minorVer = 1;
+                uint32_t majorVer = 6;
+                uint32_t minorVer = 1;
 
                 if (osinfo.dwMajorVersion > majorVer)
                 {
@@ -608,18 +611,18 @@ bool pal::get_default_bundle_extraction_base_dir(pal::string_t& extraction_dir)
     return realpath(&extraction_dir);
 }
 
-static bool wchar_convert_helper(DWORD code_page, const char* cstr, int len, pal::string_t* out)
+static bool wchar_convert_helper(DWORD code_page, const char* cstr, size_t len, pal::string_t* out)
 {
     out->clear();
 
     // No need of explicit null termination, so pass in the actual length.
-    size_t size = ::MultiByteToWideChar(code_page, 0, cstr, len, nullptr, 0);
+    size_t size = ::MultiByteToWideChar(code_page, 0, cstr, static_cast<uint32_t>(len), nullptr, 0);
     if (size == 0)
     {
         return false;
     }
     out->resize(size, '\0');
-    return ::MultiByteToWideChar(code_page, 0, cstr, len, &(*out)[0], out->size()) != 0;
+    return ::MultiByteToWideChar(code_page, 0, cstr, static_cast<uint32_t>(len), &(*out)[0], static_cast<uint32_t>(out->size())) != 0;
 }
 
 bool pal::pal_utf8string(const pal::string_t& str, std::vector<char>* out)
@@ -633,7 +636,7 @@ bool pal::pal_utf8string(const pal::string_t& str, std::vector<char>* out)
         return false;
     }
     out->resize(size, '\0');
-    return ::WideCharToMultiByte(CP_UTF8, 0, str.c_str(), -1, out->data(), out->size(), nullptr, nullptr) != 0;
+    return ::WideCharToMultiByte(CP_UTF8, 0, str.c_str(), -1, out->data(), static_cast<uint32_t>(out->size()), nullptr, nullptr) != 0;
 }
 
 bool pal::pal_clrstring(const pal::string_t& str, std::vector<char>* out)
@@ -660,7 +663,7 @@ bool pal::realpath(string_t* path, bool skip_error_logging)
     }
 
     char_t buf[MAX_PATH];
-    auto size = ::GetFullPathNameW(path->c_str(), MAX_PATH, buf, nullptr);
+    size_t size = ::GetFullPathNameW(path->c_str(), MAX_PATH, buf, nullptr);
     if (size == 0)
     {
         if (!skip_error_logging)
@@ -679,7 +682,7 @@ bool pal::realpath(string_t* path, bool skip_error_logging)
     {
         str.resize(size + LongFile::UNCExtendedPathPrefix.length(), 0);
 
-        size = ::GetFullPathNameW(path->c_str(), size, (LPWSTR)str.data(), nullptr);
+        size = ::GetFullPathNameW(path->c_str(), static_cast<uint32_t>(size), (LPWSTR)str.data(), nullptr);
         assert(size <= str.size());
 
         if (size == 0)

src/native/corehost/hostmisc/utils.cpp

@@ -329,7 +329,7 @@ bool get_file_path_from_env(const pal::char_t* env_key, pal::string_t* recv)
     return false;
 }
 
-size_t index_of_non_numeric(const pal::string_t& str, unsigned i)
+size_t index_of_non_numeric(const pal::string_t& str, size_t i)
 {
     return str.find_first_not_of(_X("0123456789"), i);
 }
@@ -340,7 +340,7 @@ bool try_stou(const pal::string_t& str, unsigned* num)
     {
         return false;
     }
-    if (index_of_non_numeric(str, 0) != pal::string_t::npos)
+    if (index_of_non_numeric(str, 0u) != pal::string_t::npos)
     {
         return false;
     }

src/native/corehost/hostmisc/utils.h

@@ -6,6 +6,7 @@
 
 #include "pal.h"
 #include "trace.h"
+#include <type_traits>
 
 #define _STRINGIFY(s) _X(s)
 #if defined(_WIN32)
@@ -40,7 +41,7 @@ bool get_global_shared_store_dirs(std::vector<pal::string_t>* dirs, const pal::s
 bool multilevel_lookup_enabled();
 void get_framework_and_sdk_locations(const pal::string_t& dotnet_dir, std::vector<pal::string_t>* locations);
 bool get_file_path_from_env(const pal::char_t* env_key, pal::string_t* recv);
-size_t index_of_non_numeric(const pal::string_t& str, unsigned i);
+size_t index_of_non_numeric(const pal::string_t& str, size_t i);
 bool try_stou(const pal::string_t& str, unsigned* num);
 pal::string_t get_dotnet_root_env_var_name();
 pal::string_t get_deps_from_app_binary(const pal::string_t& app_base, const pal::string_t& app);
@@ -115,4 +116,12 @@ class error_writer_scope_t
     }
 };
 
+template<typename T>
+size_t to_size_t_dbgchecked(T value)
+{
+    assert(value >= 0);
+    assert(value < static_cast<T>(std::numeric_limits<size_t>::max()));
+    return static_cast<size_t>(value);
+}
+
 #endif

src/native/corehost/hostpolicy/deps_resolver.cpp

@@ -243,7 +243,7 @@ void deps_resolver_t::setup_probe_config(
     m_probes.push_back(probe_config_t::published_deps_dir());
 
     // The framework locations, starting with highest level framework.
-    for (size_t i = 1; i < m_fx_definitions.size(); ++i)
+    for (int32_t i = 1; i < static_cast<int32_t>(m_fx_definitions.size()); ++i)
     {
         if (pal::directory_exists(m_fx_definitions[i]->get_dir()))
         {
@@ -572,7 +572,7 @@ bool deps_resolver_t::resolve_tpa_list(
     // Probe FX deps entries after app assemblies are added.
     if (m_is_framework_dependent)
     {
-        for (size_t i = 1; i < m_fx_definitions.size(); ++i)
+        for (int32_t i = 1; i < static_cast<int32_t>(m_fx_definitions.size()); ++i)
         {
             const auto& deps_entries = m_fx_definitions[i]->get_deps().get_entries(deps_entry_t::asset_types::runtime);
             for (const auto& entry : deps_entries)
@@ -864,7 +864,7 @@ bool deps_resolver_t::resolve_probe_dirs(
     }
 
     // Add fx package locations to fx_dir
-    for (size_t i = 1; i < m_fx_definitions.size(); ++i)
+    for (int32_t i = 1; i < static_cast<int32_t>(m_fx_definitions.size()); ++i)
     {
         const auto& fx_entries = m_fx_definitions[i]->get_deps().get_entries(asset_type);
 

src/native/corehost/hostpolicy/deps_resolver.h

@@ -53,7 +53,7 @@ class deps_resolver_t
         , m_core_servicing(args.core_servicing)
         , m_is_framework_dependent(is_framework_dependent)
     {
-        int lowest_framework = m_fx_definitions.size() - 1;
+        int lowest_framework = static_cast<int>(m_fx_definitions.size()) - 1;
         int root_framework = -1;
         if (root_framework_rid_fallback_graph == nullptr)
         {

src/native/corehost/hostpolicy/hostpolicy.cpp

@@ -247,7 +247,7 @@ int run_app_for_context(
     // Execute the application
     unsigned int exit_code;
     auto hr = context.coreclr->execute_assembly(
-        argv_local.size(),
+        (int32_t)argv_local.size(),
         argv_local.data(),
         managed_app.data(),
         &exit_code);
@@ -448,7 +448,7 @@ SHARED_API int HOSTPOLICY_CALLTYPE corehost_main_with_output_buffer(const int ar
             return rc;
 
         // Get length in character count not including null terminator
-        int len = output_string.length();
+        int32_t len = static_cast<int32_t>(output_string.length());
 
         if (len + 1 > buffer_size)
         {