Merge pull request #1557 from semarie/openbsd-support

initial OpenBSD support

7 files changed, 160 insertions, 8 deletions

diff --git a/src/bug_report.cpp b/src/bug_report.cpp
index 4dd251f24..02a2b1ba2 100644
--- a/src/bug_report.cpp
+++ b/src/bug_report.cpp
@@ -17,6 +17,11 @@
 	#include <sys/sysctl.h>

 #endif

 

+#if defined(GB_SYSTEM_OPENBSD)

+	#include <sys/sysctl.h>

+	#include <sys/utsname.h>

+#endif

+

 /*

 	NOTE(Jeroen): This prints the Windows product edition only, to be called from `print_platform_details`.

 */

@@ -242,6 +247,14 @@ void report_ram_info() {
 		if (sysctl(sysctls, 2, &ram_amount, &val_size, NULL, 0) != -1) {

 			gb_printf("%lld MiB\n", ram_amount / gb_megabytes(1));

 		}

+	#elif defined(GB_SYSTEM_OPENBSD)

+		uint64_t ram_amount;

+		size_t   val_size = sizeof(ram_amount);

+

+		int sysctls[] = { CTL_HW, HW_PHYSMEM64 };

+		if (sysctl(sysctls, 2, &ram_amount, &val_size, NULL, 0) != -1) {

+			gb_printf("%lld MiB\n", ram_amount / gb_megabytes(1));

+		}

 	#else

 		gb_printf("Unknown.\n");

 	#endif

@@ -643,6 +656,14 @@ void print_bug_report_help() {
 		} else {

 			gb_printf("macOS: Unknown\n");

 		}			

+	#elif defined(GB_SYSTEM_OPENBSD)

+		struct utsname un;

+		

+		if (uname(&un) != -1) {

+			gb_printf("%s %s %s %s\n", un.sysname, un.release, un.version, un.machine);

+		} else {

+			gb_printf("OpenBSD: Unknown\n");    

+		}

 	#else

 		gb_printf("Unknown\n");

 

@@ -657,4 +678,4 @@ void print_bug_report_help() {
 		And RAM info.

 	*/

 	report_ram_info();

-}
\ No newline at end of file
+}

diff --git a/src/build_settings.cpp b/src/build_settings.cpp
index 610e4f847..c40a70069 100644
--- a/src/build_settings.cpp
+++ b/src/build_settings.cpp
@@ -1,4 +1,4 @@
-#if defined(GB_SYSTEM_FREEBSD)
+#if defined(GB_SYSTEM_FREEBSD) || defined(GB_SYSTEM_OPENBSD)
 #include <sys/types.h>
 #include <sys/sysctl.h>
 #endif
@@ -16,6 +16,7 @@ enum TargetOsKind {
 	TargetOs_linux,
 	TargetOs_essence,
 	TargetOs_freebsd,
+	TargetOs_openbsd,
 	
 	TargetOs_wasi,
 	TargetOs_js,
@@ -53,6 +54,7 @@ String target_os_names[TargetOs_COUNT] = {
 	str_lit("linux"),
 	str_lit("essence"),
 	str_lit("freebsd"),
+	str_lit("openbsd"),
 	
 	str_lit("wasi"),
 	str_lit("js"),
@@ -354,6 +356,15 @@ gb_global TargetMetrics target_freebsd_amd64 = {
 	str_lit("e-m:w-i64:64-f80:128-n8:16:32:64-S128"),
 };
 
+gb_global TargetMetrics target_openbsd_amd64 = {
+	TargetOs_openbsd,
+	TargetArch_amd64,
+	8,
+	16,
+	str_lit("x86_64-unknown-openbsd-elf"),
+	str_lit("e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"),
+};
+
 gb_global TargetMetrics target_essence_amd64 = {
 	TargetOs_essence,
 	TargetArch_amd64,
@@ -417,6 +428,7 @@ gb_global NamedTargetMetrics named_targets[] = {
 	{ str_lit("windows_amd64"),       &target_windows_amd64  },
 	{ str_lit("freebsd_386"),         &target_freebsd_386    },
 	{ str_lit("freebsd_amd64"),       &target_freebsd_amd64  },
+	{ str_lit("openbsd_amd64"),       &target_openbsd_amd64  },
 	{ str_lit("freestanding_wasm32"), &target_freestanding_wasm32 },
 	{ str_lit("wasi_wasm32"),         &target_wasi_wasm32 },
 	{ str_lit("js_wasm32"),           &target_js_wasm32 },
@@ -722,10 +734,38 @@ String internal_odin_root_dir(void) {
 		len = readlink("/proc/curproc/exe", &path_buf[0], path_buf.count);
 #elif defined(GB_SYSTEM_DRAGONFLYBSD)
 		len = readlink("/proc/curproc/file", &path_buf[0], path_buf.count);
-#else
+#elif defined(GB_SYSTEM_LINUX)
 		len = readlink("/proc/self/exe", &path_buf[0], path_buf.count);
+#elif defined(GB_SYSTEM_OPENBSD)
+		int error;
+		int mib[] = {
+			CTL_KERN,
+			KERN_PROC_ARGS,
+			getpid(),
+			KERN_PROC_ARGV,
+		};
+		// get argv size
+		error = sysctl(mib, 4, NULL, (size_t *) &len, NULL, 0);
+		if (error == -1) {
+			// sysctl error
+			return make_string(nullptr, 0);
+		}
+		// get argv
+		char **argv = (char **)gb_malloc(len);
+		error = sysctl(mib, 4, argv, (size_t *) &len, NULL, 0);
+		if (error == -1) {
+			// sysctl error
+			gb_mfree(argv);
+			return make_string(nullptr, 0);
+		}
+		// copy argv[0] to path_buf
+		len = gb_strlen(argv[0]);
+		if(len < path_buf.count) {
+			gb_memmove(&path_buf[0], argv[0], len);
+		}
+		gb_mfree(argv);
 #endif
-		if(len == 0) {
+		if(len == 0 || len == -1) {
 			return make_string(nullptr, 0);
 		}
 		if (len < path_buf.count) {
@@ -922,6 +962,8 @@ void init_build_context(TargetMetrics *cross_target) {
 			#endif
 		#elif defined(GB_SYSTEM_FREEBSD)
 			metrics = &target_freebsd_amd64;
+		#elif defined(GB_SYSTEM_OPENBSD)
+			metrics = &target_openbsd_amd64;
 		#elif defined(GB_CPU_ARM)
 			metrics = &target_linux_arm64;
 		#else
@@ -980,6 +1022,9 @@ void init_build_context(TargetMetrics *cross_target) {
 		case TargetOs_freebsd:
 			bc->link_flags = str_lit("-arch x86-64 ");
 			break;
+		case TargetOs_openbsd:
+			bc->link_flags = str_lit("-arch x86-64 ");
+			break;
 		}
 	} else if (bc->metrics.arch == TargetArch_i386) {
 		switch (bc->metrics.os) {
diff --git a/src/check_builtin.cpp b/src/check_builtin.cpp
index eb9d7f293..69cc40de8 100644
--- a/src/check_builtin.cpp
+++ b/src/check_builtin.cpp
@@ -3506,6 +3506,7 @@ bool check_builtin_procedure(CheckerContext *c, Operand *operand, Ast *call, i32
 			case TargetOs_linux:
 			case TargetOs_essence:
 			case TargetOs_freebsd:
+			case TargetOs_openbsd:
 				switch (build_context.metrics.arch) {
 				case TargetArch_i386:
 				case TargetArch_amd64:
diff --git a/src/checker.cpp b/src/checker.cpp
index f440b7c9a..5a7ece263 100644
--- a/src/checker.cpp
+++ b/src/checker.cpp
@@ -906,6 +906,7 @@ void init_universal(void) {
 			{"Linux",        TargetOs_linux},
 			{"Essence",      TargetOs_essence},
 			{"FreeBSD",      TargetOs_freebsd},
+			{"OpenBSD",      TargetOs_openbsd},
 			{"WASI",         TargetOs_wasi},
 			{"JS",           TargetOs_js},
 			{"Freestanding", TargetOs_freestanding},
diff --git a/src/common.cpp b/src/common.cpp
index d3ee95b76..aaacda04b 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -848,7 +848,7 @@ ReadDirectoryError read_directory(String path, Array<FileInfo> *fi) {
 
 	return ReadDirectory_None;
 }
-#elif defined(GB_SYSTEM_LINUX) || defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_FREEBSD)
+#elif defined(GB_SYSTEM_LINUX) || defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_FREEBSD) || defined(GB_SYSTEM_OPENBSD)
 
 #include <dirent.h>
 
diff --git a/src/gb/gb.h b/src/gb/gb.h
index a9d6378c9..b72a893f7 100644
--- a/src/gb/gb.h
+++ b/src/gb/gb.h
@@ -79,6 +79,10 @@ extern "C" {
 		#ifndef GB_SYSTEM_FREEBSD
 		#define GB_SYSTEM_FREEBSD 1
 		#endif
+	#elif defined(__OpenBSD__)
+		#ifndef GB_SYSTEM_OPENBSD
+		#define GB_SYSTEM_OPENBSD 1
+		#endif
 	#else
 		#error This UNIX operating system is not supported
 	#endif
@@ -199,7 +203,7 @@ extern "C" {
 	#endif
 	#include <stdlib.h> // NOTE(bill): malloc on linux
 	#include <sys/mman.h>
-	#if !defined(GB_SYSTEM_OSX) && !defined(__FreeBSD__)
+	#if !defined(GB_SYSTEM_OSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
 		#include <sys/sendfile.h>
 	#endif
 	#include <sys/stat.h>
@@ -235,6 +239,12 @@ extern "C" {
 	#define sendfile(out, in, offset, count) sendfile(out, in, offset, count, NULL, NULL, 0)
 #endif
 
+#if defined(GB_SYSTEM_OPENBSD)
+	#include <stdio.h>
+	#include <pthread_np.h>
+	#define lseek64 lseek
+#endif
+    
 #if defined(GB_SYSTEM_UNIX)
 	#include <semaphore.h>
 #endif
@@ -783,6 +793,13 @@ typedef struct gbAffinity {
 	isize thread_count;
 	isize threads_per_core;
 } gbAffinity;
+#elif defined(GB_SYSTEM_OPENBSD)
+typedef struct gbAffinity {
+	b32   is_accurate;
+	isize core_count;
+	isize thread_count;
+	isize threads_per_core;
+} gbAffinity;
 #else
 #error TODO(bill): Unknown system
 #endif
@@ -3682,6 +3699,30 @@ isize gb_affinity_thread_count_for_core(gbAffinity *a, isize core) {
 	GB_ASSERT(0 <= core && core < a->core_count);
 	return a->threads_per_core;
 }
+
+#elif defined(GB_SYSTEM_OPENBSD)
+#include <unistd.h>
+
+void gb_affinity_init(gbAffinity *a) {
+	a->core_count       = sysconf(_SC_NPROCESSORS_ONLN);
+	a->threads_per_core = 1;
+	a->is_accurate      = a->core_count > 0;
+	a->core_count       = a->is_accurate ? a->core_count : 1;
+	a->thread_count     = a->core_count;
+}
+
+void gb_affinity_destroy(gbAffinity *a) {
+	gb_unused(a);
+}
+
+b32 gb_affinity_set(gbAffinity *a, isize core, isize thread_index) {
+	return true;
+}
+
+isize gb_affinity_thread_count_for_core(gbAffinity *a, isize core) {
+	GB_ASSERT(0 <= core && core < a->core_count);
+	return a->threads_per_core;
+}
 #else
 #error TODO(bill): Unknown system
 #endif
@@ -6025,7 +6066,7 @@ gbFileTime gb_file_last_write_time(char const *filepath) {
 gb_inline b32 gb_file_copy(char const *existing_filename, char const *new_filename, b32 fail_if_exists) {
 #if defined(GB_SYSTEM_OSX)
 	return copyfile(existing_filename, new_filename, NULL, COPYFILE_DATA) == 0;
-#else
+#elif defined(GB_SYSTEM_LINUX) || defined(GB_SYSTEM_FREEBSD)
 	isize size;
 	int existing_fd = open(existing_filename, O_RDONLY, 0);
 	int new_fd      = open(new_filename, O_WRONLY|O_CREAT, 0666);
@@ -6042,6 +6083,49 @@ gb_inline b32 gb_file_copy(char const *existing_filename, char const *new_filena
 	close(existing_fd);
 
 	return size == stat_existing.st_size;
+#else
+	int new_flags = O_WRONLY | O_CREAT;
+	if (fail_if_exists) {
+		new_flags |= O_EXCL;
+	}
+	int existing_fd = open(existing_filename, O_RDONLY, 0);
+	int new_fd      = open(new_filename, new_flags, 0666);
+
+	struct stat stat_existing;
+	if (fstat(existing_fd, &stat_existing) == -1) {
+		return 0;
+	}
+
+	size_t bsize = stat_existing.st_blksize > BUFSIZ ? stat_existing.st_blksize : BUFSIZ;
+	char *buf = (char *)malloc(bsize);
+	if (buf == NULL) {
+		close(new_fd);
+		close(existing_fd);
+		return 0;
+	}
+
+	isize size = 0;
+	ssize_t nread, nwrite, offset;
+	while ((nread = read(existing_fd, buf, bsize)) != -1 && nread != 0) {
+		for (offset = 0; nread; nread -= nwrite, offset += nwrite) {
+			if ((nwrite = write(new_fd, buf + offset, nread)) == -1 || nwrite == 0) {
+				free(buf);
+				close(new_fd);
+				close(existing_fd);
+				return 0;
+			}
+			size += nwrite;
+		}
+	}
+	
+	free(buf);
+	close(new_fd);
+	close(existing_fd);
+
+	if (nread == -1) {
+		return 0;
+	}
+	return size == stat_existing.st_size;
 #endif
 }
 
diff --git a/src/threading.cpp b/src/threading.cpp
index 50d0dfed1..63e3415b2 100644
--- a/src/threading.cpp
+++ b/src/threading.cpp
@@ -486,7 +486,7 @@ void thread_set_name(Thread *t, char const *name) {
 #elif defined(GB_SYSTEM_OSX)
 	// TODO(bill): Test if this works
 	pthread_setname_np(name);
-#elif defined(GB_SYSTEM_FREEBSD)
+#elif defined(GB_SYSTEM_FREEBSD) || defined(GB_SYSTEM_OPENBSD)
 	pthread_set_name_np(t->posix_handle, name);
 #else
 	// TODO(bill): Test if this works