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📄 abi_amd64.h(2.73 KB)
📄 abi_arm64.h(1.5 KB)
📄 asm_386.s(737 B)
📄 asm_amd64.s(937 B)
📄 asm_arm.s(1.76 KB)
📄 asm_arm64.s(1.01 KB)
📄 asm_loong64.s(1.66 KB)
📄 asm_mips64x.s(2.05 KB)
📄 asm_mipsx.s(1.98 KB)
📄 asm_ppc64x.s(3.34 KB)
📄 asm_riscv64.s(1.87 KB)
📄 asm_s390x.s(1.31 KB)
📄 asm_wasm.s(223 B)
📄 callbacks.go(3.95 KB)
📄 callbacks_aix.go(402 B)
📄 callbacks_traceback.go(475 B)
📄 cgo.go(939 B)
📄 dragonfly.go(485 B)
📄 freebsd.go(549 B)
📄 gcc_386.S(834 B)
📄 gcc_aix_ppc64.S(2.69 KB)
📄 gcc_aix_ppc64.c(1.29 KB)
📄 gcc_amd64.S(1.12 KB)
📄 gcc_android.c(2.58 KB)
📄 gcc_arm.S(1.12 KB)
📄 gcc_arm64.S(1.73 KB)
📄 gcc_context.c(529 B)
📄 gcc_darwin_amd64.c(1.32 KB)
📄 gcc_darwin_arm64.c(3.71 KB)
📄 gcc_dragonfly_amd64.c(1.32 KB)
📄 gcc_fatalf.c(469 B)
📄 gcc_freebsd_386.c(1.35 KB)
📄 gcc_freebsd_amd64.c(1.56 KB)
📄 gcc_freebsd_arm.c(1.65 KB)
📄 gcc_freebsd_arm64.c(1.41 KB)
📄 gcc_freebsd_sigaction.c(1.99 KB)
📄 gcc_libinit.c(3.2 KB)
📄 gcc_libinit_windows.c(3.95 KB)
📄 gcc_linux_386.c(1.5 KB)
📄 gcc_linux_amd64.c(2.46 KB)
📄 gcc_linux_arm.c(1.47 KB)
📄 gcc_linux_arm64.c(2.28 KB)
📄 gcc_linux_loong64.c(1.44 KB)
📄 gcc_linux_mips64x.c(1.5 KB)
📄 gcc_linux_mipsx.c(1.49 KB)
📄 gcc_linux_ppc64x.S(2.96 KB)
📄 gcc_linux_riscv64.c(1.44 KB)
📄 gcc_linux_s390x.c(1.41 KB)
📄 gcc_loong64.S(1.49 KB)
📄 gcc_mips64x.S(1.76 KB)
📄 gcc_mipsx.S(1.51 KB)
📄 gcc_mmap.c(881 B)
📄 gcc_netbsd_386.c(1.8 KB)
📄 gcc_netbsd_amd64.c(1.77 KB)
📄 gcc_netbsd_arm.c(1.85 KB)
📄 gcc_netbsd_arm64.c(1.84 KB)
📄 gcc_openbsd_386.c(1.32 KB)
📄 gcc_openbsd_amd64.c(1.29 KB)
📄 gcc_openbsd_arm.c(1.37 KB)
📄 gcc_openbsd_arm64.c(1.36 KB)
📄 gcc_openbsd_mips64.c(1.36 KB)
📄 gcc_ppc64x.c(1.43 KB)
📄 gcc_riscv64.S(1.56 KB)
📄 gcc_s390x.S(1.37 KB)
📄 gcc_setenv.c(553 B)
📄 gcc_sigaction.c(2.08 KB)
📄 gcc_signal2_ios_arm64.c(507 B)
📄 gcc_signal_ios_arm64.c(5.97 KB)
📄 gcc_signal_ios_nolldb.c(325 B)
📄 gcc_solaris_amd64.c(1.75 KB)
📄 gcc_traceback.c(1.49 KB)
📄 gcc_util.c(1.85 KB)
📄 gcc_windows_386.c(894 B)
📄 gcc_windows_amd64.c(910 B)
📄 gcc_windows_arm64.c(764 B)
📄 handle.go(3.61 KB)
📄 handle_test.go(1.82 KB)
📄 iscgo.go(646 B)
📄 libcgo.h(3.45 KB)
📄 libcgo_unix.h(604 B)
📄 libcgo_windows.h(258 B)
📄 linux.go(2.74 KB)
📄 linux_syscall.c(1.88 KB)
📄 mmap.go(1 KB)
📄 netbsd.go(546 B)
📄 openbsd.go(566 B)
📄 setenv.go(597 B)
📄 sigaction.go(877 B)
📄 signal_ios_arm64.go(270 B)
📄 signal_ios_arm64.s(1.8 KB)

Editing: gcc_android.c

// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include <stdarg.h>
#include <android/log.h>
#include <pthread.h>
#include <dlfcn.h>
#include "libcgo.h"

void
fatalf(const char* format, ...)
{
	va_list ap;

// Write to both stderr and logcat.
	//
	// When running from an .apk, /dev/stderr and /dev/stdout
	// redirect to /dev/null. And when running a test binary
	// via adb shell, it's easy to miss logcat.

fprintf(stderr, "runtime/cgo: ");
	va_start(ap, format);
	vfprintf(stderr, format, ap);
	va_end(ap);
	fprintf(stderr, "\n");

va_start(ap, format);
	__android_log_vprint(ANDROID_LOG_FATAL, "runtime/cgo", format, ap);
	va_end(ap);

abort();
}

// Truncated to a different magic value on 32-bit; that's ok.
#define magic1 (0x23581321345589ULL)

// From https://android.googlesource.com/platform/bionic/+/refs/heads/android10-tests-release/libc/private/bionic_asm_tls.h#69.
#define TLS_SLOT_APP 2

// inittls allocates a thread-local storage slot for g.
//
// It finds the first available slot using pthread_key_create and uses
// it as the offset value for runtime.tls_g.
static void
inittls(void **tlsg, void **tlsbase)
{
	pthread_key_t k;
	int i, err;
	void *handle, *get_ver, *off;

// Check for Android Q where we can use the free TLS_SLOT_APP slot.
	handle = dlopen("libc.so", RTLD_LAZY);
	if (handle == NULL) {
		fatalf("inittls: failed to dlopen main program");
		return;
	}
	// android_get_device_api_level is introduced in Android Q, so its mere presence
	// is enough.
	get_ver = dlsym(handle, "android_get_device_api_level");
	dlclose(handle);
	if (get_ver != NULL) {
		off = (void *)(TLS_SLOT_APP*sizeof(void *));
		// tlsg is initialized to Q's free TLS slot. Verify it while we're here.
		if (*tlsg != off) {
			fatalf("tlsg offset wrong, got %ld want %ld\n", *tlsg, off);
		}
		return;
	}

err = pthread_key_create(&k, nil);
	if(err != 0) {
		fatalf("pthread_key_create failed: %d", err);
	}
	pthread_setspecific(k, (void*)magic1);
	// If thread local slots are laid out as we expect, our magic word will
	// be located at some low offset from tlsbase. However, just in case something went
	// wrong, the search is limited to sensible offsets. PTHREAD_KEYS_MAX was the
	// original limit, but issue 19472 made a higher limit necessary.
	for (i=0; i<384; i++) {
		if (*(tlsbase+i) == (void*)magic1) {
			*tlsg = (void*)(i*sizeof(void *));
			pthread_setspecific(k, 0);
			return;
		}
	}
	fatalf("inittls: could not find pthread key");
}

void (*x_cgo_inittls)(void **tlsg, void **tlsbase) = inittls;

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Editing: gcc_android.c

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