Merge changes

src/apis/emscripten/env.rs

@@ -1,12 +1,17 @@
 use super::super::host;
 /// NOTE: These syscalls only support wasm_32 for now because they take u32 offset
-use libc::{c_int, getpwnam as libc_getpwnam, passwd, getgrnam as libc_getgrnam, group};
+use libc::{
+    c_int, getpwnam as libc_getpwnam, passwd,
+    getgrnam as libc_getgrnam, group, clock_gettime as libc_clock_gettime, timespec,
+    // uname as libc_uname, utsname,
+};
 use std::ffi::CStr;
 use std::os::raw::c_char;
 use std::{slice, mem};
 
 use crate::webassembly::Instance;
 use super::utils::{copy_cstr_into_wasm, copy_terminated_array_of_cstrs};
+use crate::webassembly::LinearMemory;
 
 /// emscripten: _getenv
 pub extern "C" fn _getenv(name_ptr: c_int, instance: &mut Instance) -> c_int {
@@ -86,3 +91,26 @@ pub extern "C" fn _getgrnam(name_ptr: c_int, instance: &mut Instance) -> c_int {
         group_struct_offset as c_int
     }
 }
+
+pub extern fn _getpid(_instance: &mut Instance) -> c_int {
+    0
+}
+pub extern fn _getppid(_instance: &mut Instance) -> c_int {
+    0
+}
+
+pub extern fn _uname(_buf: c_int, _instance: &mut Instance) -> c_int {
+    0
+}
+
+pub extern fn _localtime_r() -> u32 {
+    0
+}
+
+pub extern fn _getpagesize() -> u32 {
+    LinearMemory::PAGE_SIZE
+}
+
+pub extern fn _prlimit(pid: c_int, resource: c_int, new_limit: c_int, old_limit: c_int, instance: &mut Instance) -> c_int {
+    0
+}

src/apis/emscripten/memory.rs

@@ -21,7 +21,8 @@ pub extern "C" fn _emscripten_memcpy_big(
 /// emscripten: getTotalMemory
 pub extern "C" fn get_total_memory(instance: &mut Instance) -> u32 {
     debug!("emscripten::get_total_memory");
-    instance.memories[0].current_pages()
+    // instance.memories[0].current_pages()
+    16777216
 }
 
 /// emscripten: enlargeMemory

src/apis/emscripten/mod.rs

@@ -57,9 +57,9 @@ pub fn emscripten_set_up_memory(memory: &mut LinearMemory) {
 
 macro_rules! mock_external {
     ($import:ident, $name:ident) => {{
-        fn _mocked_fn() {
+        extern fn _mocked_fn() -> i32 {
             println!("emscripten::{} <mock>", stringify!($name));
-            // return 0
+            -1
         }
         $import.set(
             "env",
@@ -304,6 +304,32 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "_time",
         ImportValue::Func(time::_time as _),
     );
+    import_object.set(
+        "env",
+        "___syscall20",
+        ImportValue::Func(env::_getpid as _),
+    );
+    import_object.set(
+        "env",
+        "___syscall64",
+        ImportValue::Func(env::_getppid as _),
+    );
+    import_object.set(
+        "env",
+        "___syscall122",
+        ImportValue::Func(env::_uname as _),
+    );
+    import_object.set(
+        "env",
+        "_localtime_r",
+        ImportValue::Func(env::_localtime_r as _),
+    );
+    import_object.set(
+        "env",
+        "_getpagesize",
+        ImportValue::Func(env::_getpagesize as _),
+    );
+
     mock_external!(import_object, _waitpid);
     mock_external!(import_object, _utimes);
     mock_external!(import_object, _usleep);
@@ -324,14 +350,14 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
     mock_external!(import_object, _sched_yield);
     mock_external!(import_object, _raise);
     mock_external!(import_object, _mktime);
-    mock_external!(import_object, _localtime_r);
-    // mock_external!(import_object, _localtime);
+    // mock_external!(import_object, _localtime_r);
+    mock_external!(import_object, _localtime);
     mock_external!(import_object, _llvm_stacksave);
     mock_external!(import_object, _llvm_stackrestore);
     mock_external!(import_object, _kill);
     mock_external!(import_object, _gmtime_r);
     // mock_external!(import_object, _gettimeofday);
-    mock_external!(import_object, _getpagesize);
+    // mock_external!(import_object, _getpagesize);
     mock_external!(import_object, _getgrent);
     mock_external!(import_object, _getaddrinfo);
     mock_external!(import_object, _fork);
@@ -344,7 +370,7 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
     mock_external!(import_object, ___syscall85);
     mock_external!(import_object, ___syscall75);
     mock_external!(import_object, ___syscall66);
-    mock_external!(import_object, ___syscall64);
+    // mock_external!(import_object, ___syscall64);
     mock_external!(import_object, ___syscall63);
     mock_external!(import_object, ___syscall60);
     mock_external!(import_object, ___syscall54);
@@ -373,9 +399,9 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
     // mock_external!(import_object, ___syscall145);
     mock_external!(import_object, ___syscall142);
     mock_external!(import_object, ___syscall140);
-    mock_external!(import_object, ___syscall122);
+    // mock_external!(import_object, ___syscall122);
     mock_external!(import_object, ___syscall102);
-    mock_external!(import_object, ___syscall20);
+    // mock_external!(import_object, ___syscall20);
     mock_external!(import_object, ___syscall15);
     mock_external!(import_object, ___syscall10);
 

src/apis/emscripten/time.rs

@@ -2,7 +2,7 @@ use libc::{
     gettimeofday,
     timeval,
     c_int,
-    clock_gettime,
+    clock_gettime as libc_clock_gettime,
     clockid_t,
     timespec,
     tm,
@@ -15,30 +15,72 @@ use std::{ptr, slice, mem};
 use crate::webassembly::Instance;
 
 /// emscripten: _gettimeofday
-pub extern "C" fn _gettimeofday(timeval_ptr_offset: c_int, tz_offset: c_int, instance: &mut Instance) -> c_int {
-    debug!("emscripten::_gettimeofday {}", timeval_ptr_offset);
+// pub extern "C" fn _gettimeofday(timeval_ptr_offset: c_int, tz_offset: c_int, instance: &mut Instance) -> c_int {
+//     debug!("emscripten::_gettimeofday {}", timeval_ptr_offset);
 
-    unsafe {
-        let mut timeval_value = *(instance.memory_offset_addr(0, timeval_ptr_offset as _) as *mut timeval);
-        // We skip the timezone for now
-        let mut tz = ptr::null_mut();
-        debug!("emscripten::_gettimeofday(initial) {} {}", (timeval_value).tv_sec, (timeval_value).tv_usec);
+//     unsafe {
+//         let mut timeval_value = *(instance.memory_offset_addr(0, timeval_ptr_offset as _) as *mut timeval);
+//         // We skip the timezone for now
+//         let mut tz = ptr::null_mut();
+//         debug!("emscripten::_gettimeofday(initial) {} {}", (timeval_value).tv_sec, (timeval_value).tv_usec);
 
-        let returned = gettimeofday(&mut timeval_value, tz);
-        debug!("emscripten::_gettimeofday(filled) {} {}", (timeval_value).tv_sec, (timeval_value).tv_usec);
-        returned
+//         let returned = gettimeofday(&mut timeval_value, tz);
+//         debug!("emscripten::_gettimeofday(filled) {} {}", (timeval_value).tv_sec, (timeval_value).tv_usec);
+//         returned
+//     }
+// }
+pub extern fn _gettimeofday(tp: c_int, tz: c_int, instance: &mut Instance) -> c_int {
+    #[repr(C)]
+    struct GuestTimeVal {
+        tv_sec: i32,
+        tv_usec: i32,
     }
+
+    assert!(tz == 0, "the timezone argument of `_gettimeofday` must be null");
+    unsafe {
+        let now = SystemTime::now();
+        let since_epoch = now.duration_since(SystemTime::UNIX_EPOCH).unwrap();
+        let timeval_struct_ptr = instance.memory_offset_addr(0, tp as _) as *mut GuestTimeVal;
+
+        (*timeval_struct_ptr).tv_sec = since_epoch.as_secs() as _;
+        (*timeval_struct_ptr).tv_usec = since_epoch.subsec_nanos() as _;
+    }
+    0
 }
 
+
 /// emscripten: _clock_gettime
-pub extern "C" fn _clock_gettime(clk_id: clockid_t, tp_offset: c_int, instance: &mut Instance) -> c_int {
-    debug!("emscripten::_clock_gettime {} {}", clk_id, tp_offset);
+// pub extern "C" fn _clock_gettime(clk_id: clockid_t, tp_offset: c_int, instance: &mut Instance) -> c_int {
+//     debug!("emscripten::_clock_gettime {} {}", clk_id, tp_offset);
+
+//     unsafe {
+//         let mut tp = instance.memory_offset_addr(0, tp_offset as _) as *mut timespec;
+//         let returned = clock_gettime(clk_id, tp);
+//         debug!("emscripten::clock_gettime(filled) {} {}", (*tp).tv_sec, (*tp).tv_nsec);
+//         returned
+//     }
+// }
+
+pub extern fn _clock_gettime(clk_id: c_int, tp: c_int, instance: &mut Instance) -> c_int {
+    #[repr(C)]
+    struct GuestTimeSpec {
+        tv_sec: i32,
+        tv_nsec: i32,
+    }
 
     unsafe {
-        let mut tp = instance.memory_offset_addr(0, tp_offset as _) as *mut timespec;
-        let returned = clock_gettime(clk_id, tp);
-        debug!("emscripten::clock_gettime(filled) {} {}", (*tp).tv_sec, (*tp).tv_nsec);
-        returned
+        let mut timespec = timespec {
+            tv_sec: 0,
+            tv_nsec: 0,
+        };
+        let ret = libc_clock_gettime(clk_id as _, &mut timespec);
+        if ret != 0 {
+            return ret;
+        }
+
+        let timespec_struct_ptr = instance.memory_offset_addr(0, tp as _) as *mut GuestTimeSpec;
+        (*timespec_struct_ptr).tv_sec = timespec.tv_sec as _;
+        (*timespec_struct_ptr).tv_nsec = timespec.tv_nsec as _;
     }
 }
 

src/apis/emscripten/utils.rs

@@ -1,10 +1,9 @@
 use crate::webassembly::module::Module;
+use crate::webassembly::Instance;
 use std::ffi::CStr;
 use std::os::raw::c_char;
 use std::{slice, mem};
 
-use crate::webassembly::Instance;
-
 /// We check if a provided module is an Emscripten generated one
 pub fn is_emscripten_module(module: &Module) -> bool {
     for (module, _field) in &module.info.imported_funcs {
@@ -24,7 +23,6 @@ pub unsafe fn copy_cstr_into_wasm(instance: &mut Instance, cstr: *const c_char)
     for (byte, loc) in s.bytes().zip(slice.iter_mut()) {
         *loc = byte;
     }
-
     space_offset
 }