Add script to build Ultra.Sampler NativeAOT library

Author: xoofx

src/Ultra.Sampler/MacOS/NativeModuleEvent.cs

@@ -2,6 +2,8 @@
 // Licensed under the BSD-Clause 2 license.
 // See license.txt file in the project root for full license information.
 
+using System.Text;
+
 namespace Ultra.Sampler.MacOS;
 
 internal struct NativeModuleEvent
@@ -13,6 +15,6 @@ internal struct NativeModuleEvent
 
     public override string ToString()
     {
-        return $"{nameof(LoadAddress)}: 0x{LoadAddress:X8}, {nameof(Path)}: {Path}, {nameof(TimestampUtc)}: {TimestampUtc:O}";
+        return $"{nameof(LoadAddress)}: 0x{LoadAddress:X8}, {nameof(Path)}: {Encoding.UTF8.GetString(Path ?? [])}, {nameof(TimestampUtc)}: {TimestampUtc:O}";
     }
 }

src/Ultra.Sampler/Ultra.Sampler.csproj

@@ -6,6 +6,11 @@
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPackable>false</IsPackable>
+    <PublishAot>true</PublishAot>
+    <AssemblyName>libUltraSampler</AssemblyName>
+    <EventSourceSupport>true</EventSourceSupport>
+    <_SuppressNativeLibEventSourceWarning>true</_SuppressNativeLibEventSourceWarning>
+    <InvariantGlobalization>true</InvariantGlobalization>
   </PropertyGroup>
 
   <ItemGroup>

src/Ultra.Sampler/build_native.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env sh
+dotnet publish -c Release -r osx-arm64
+LIB_NAME=libUltraSampler.dylib
+LIB_OUTPUT_PATH=./bin/Release/net8.0/osx-arm64/publish/$LIB_NAME
+install_name_tool -id $LIB_NAME $LIB_OUTPUT_PATH
+cp $LIB_OUTPUT_PATH ./$LIB_NAME
+clang -shared -O2 -o libUltraSamplerIndirect.dyld ultra_sampler_indirect.cpp ./$LIB_NAME

src/Ultra.Sampler/ultra_sampler_indirect.cpp

@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+extern "C" {
+    void ultra_sampler_start();
+
+
+    void set_temporary_tmpdir(const char* sub_dir_name, void (*func)()) {
+        // Get the current TMPDIR
+        const char* original_tmpdir = getenv("TMPDIR");
+        if (!original_tmpdir) {
+            return;
+        }
+
+        size_t original_tmpdir_len = strlen(original_tmpdir);
+        bool has_trailing_slash = original_tmpdir[original_tmpdir_len - 1] == '/';
+
+        // Construct the new TMPDIR path
+        size_t new_tmpdir_len = original_tmpdir_len + strlen(sub_dir_name) + 1 + (has_trailing_slash ? 1 : 0); // +1 for '\0', and +1 for the trailing slash
+        char* new_tmpdir = (char*)malloc(new_tmpdir_len);
+        if (!new_tmpdir) {
+            // perror("Failed to allocate memory");
+            return;
+        }
+
+        snprintf(new_tmpdir, new_tmpdir_len, has_trailing_slash ? "%s%s/" : "%s/%s/", original_tmpdir, sub_dir_name);
+
+        // Create the subdirectory if it doesn't exist
+        if (mkdir(new_tmpdir, 0700) != 0 && errno != EEXIST) {
+            //perror("Failed to create directory");
+            free(new_tmpdir);
+            return;
+        }
+
+        // Set the TMPDIR environment variable to the new subdirectory
+        if (setenv("TMPDIR", new_tmpdir, 1) != 0) {
+            //perror("Failed to set TMPDIR");
+            free(new_tmpdir);
+            return;
+        }
+        free(new_tmpdir);
+
+        pid_t pid = getpid();
+        printf("Current Process pid: %d tmpdir: %s\n", pid, getenv("TMPDIR"));
+
+        // Call the arbitrary function
+        func();
+
+        // Restore the original TMPDIR
+        setenv("TMPDIR", original_tmpdir, 1);
+    }
+
+    __attribute__((visibility("default"),used))
+    void ultra_sampler_boot()
+    {
+        set_temporary_tmpdir(".ultra", ultra_sampler_start);
+    }
+
+    __attribute__((visibility("default"),used))
+    __attribute__((section("__DATA,__mod_init_func"))) void (*ultra_sampler_boot_ptr)() = &ultra_sampler_boot;
+}