Illegal instruction handler

example/back

@@ -0,0 +1 @@
+Subproject commit a21ef046ad624ff1bdc6e8de77c38e8c32eec86b

example/main_linux.odin

@@ -0,0 +1,38 @@
+#+build linux, darwin, netbsd, openbsd, freebsd
+
+package main
+
+import "back"
+import "base:runtime"
+
+import "core:fmt"
+import "core:mem"
+import "core:sys/posix"
+
+@(private="package")
+_register_illegal_instruction_handler :: proc() {
+	posix.signal(.SIGILL, proc "c" (code: posix.Signal) {
+		context = runtime.default_context()
+
+		space: [16*mem.Kilobyte]byte
+		arena: mem.Arena
+		mem.arena_init(&arena, space[:])
+		allocator := mem.arena_allocator(&arena)
+
+		context.allocator      = allocator
+		context.temp_allocator = allocator
+
+		backtrace: {
+			lines, err := back.lines(back.trace(), allocator, allocator)
+			if err != nil {
+				fmt.eprintf("Exception (Code: %i)\nCould not get backtrace: %v\n", code, err)
+				break backtrace
+			}
+
+			fmt.eprintf("Exception (Code: %i)\n[back trace]\n", code)
+			back.print(lines, temp_allocator=allocator)
+		}
+
+		runtime.exit(int(code))
+	})
+}

example/main_other.odin

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+#+vet explicit-allocators
+#+build !linux
+#+build !darwin
+#+build !netbsd
+#+build !openbsd
+#+build !freebsd
+#+build !windows
+package main
+
+@(private="package")
+_register_illegal_instruction_handler :: proc() {}