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app: set TMPDIR and plumb through to Go

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Change-Id: Ia39f134c5ffe39decc04c2bd59b69981c1c46e41
Reviewed-on: https://go-review.googlesource.com/5579
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This commit is contained in:
David Crawshaw 2015-02-23 10:32:03 -05:00
parent 39aa39772d
commit 6bd177a50f
2 changed files with 92 additions and 6 deletions
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1
app/Go.java
View File

@ -22,7 +22,6 @@ public final class Go {
}
running = true;
// TODO(crawshaw): setenv TMPDIR to context.getCacheDir().getAbsolutePath()
// TODO(crawshaw): context.registerComponentCallbacks for runtime.GC
System.loadLibrary("gojni");

97
app/android.c
View File

@ -15,6 +15,9 @@
#include <string.h>
#include "_cgo_export.h"
#define LOG_INFO(...) __android_log_print(ANDROID_LOG_INFO, "Go", __VA_ARGS__)
#define LOG_FATAL(...) __android_log_print(ANDROID_LOG_FATAL, "Go", __VA_ARGS__)
// Defined in the Go runtime.
static int (*_rt0_arm_linux1)(int argc, char** argv);
@ -36,10 +39,92 @@ jint JNI_OnLoad(JavaVM* vm, void* reserved) {
return JNI_VERSION_1_6;
}
static jclass find_class(JNIEnv *env, const char *class_name) {
jclass clazz = (*env)->FindClass(env, class_name);
if (clazz == NULL) {
LOG_FATAL("cannot find %s", class_name);
return NULL;
}
return clazz;
}
static jmethodID find_method(JNIEnv *env, jclass clazz, const char *name, const char *sig) {
jmethodID m = (*env)->GetMethodID(env, clazz, name, sig);
if (m == 0) {
LOG_FATAL("cannot find method %s %s", name, sig);
return 0;
}
return m;
}
static void init_from_context() {
if (current_ctx == NULL) {
return;
}
int attached = 0;
JNIEnv* env;
switch ((*current_vm)->GetEnv(current_vm, (void**)&env, JNI_VERSION_1_6)) {
case JNI_OK:
break;
case JNI_EDETACHED:
if ((*current_vm)->AttachCurrentThread(current_vm, &env, 0) != 0) {
LOG_FATAL("cannot attach JVM");
}
attached = 1;
break;
case JNI_EVERSION:
LOG_FATAL("bad JNI version");
}
// String path = context.getCacheDir().getAbsolutePath();
jclass context_clazz = find_class(env, "android/content/Context");
jmethodID getcachedir = find_method(env, context_clazz, "getCacheDir", "()Ljava/io/File;");
jobject file = (*env)->CallObjectMethod(env, current_ctx, getcachedir, NULL);
jclass file_clazz = find_class(env, "java/io/File");
jmethodID getabsolutepath = find_method(env, file_clazz, "getAbsolutePath", "()Ljava/lang/String;");
jstring jpath = (jstring)(*env)->CallObjectMethod(env, file, getabsolutepath, NULL);
const char* path = (*env)->GetStringUTFChars(env, jpath, NULL);
if (setenv("TMPDIR", path, 1) != 0) {
LOG_INFO("setenv(\"TMPDIR\", \"%s\", 1) failed: %d", path, errno);
}
(*env)->ReleaseStringUTFChars(env, jpath, path);
if (attached) {
(*current_vm)->DetachCurrentThread(current_vm);
}
}
// has_prefix_key returns 1 if s starts with prefix.
static int has_prefix(const char *s, const char* prefix) {
while (*prefix) {
if (*prefix++ != *s++)
return 0;
}
return 1;
}
// getenv_raw searches environ for name prefix and returns the string pair.
// For example, getenv_raw("PATH=") returns "PATH=/bin".
// If no entry is found, the name prefix is returned. For example "PATH=".
static const char* getenv_raw(const char *name) {
extern char** environ;
char** env = environ;
for (env = environ; *env; env++) {
if (has_prefix(*env, name)) {
return *env;
}
}
return name;
}
static void* init_go_runtime(void* unused) {
init_from_context();
_rt0_arm_linux1 = (int (*)(int, char**))dlsym(RTLD_DEFAULT, "_rt0_arm_linux1");
if (_rt0_arm_linux1 == NULL) {
__android_log_print(ANDROID_LOG_FATAL, "Go", "missing _rt0_arm_linux1");
LOG_FATAL("missing _rt0_arm_linux1");
}
// Defensively heap-allocate argv0, for setenv.
@ -48,13 +133,15 @@ static void* init_go_runtime(void* unused) {
// Build argv, including the ELF auxiliary vector.
struct {
char* argv[2];
char* envp[2];
const char* envp[4];
uint32_t auxv[64];
} x;
x.argv[0] = argv0;
x.argv[1] = NULL;
x.envp[0] = argv0;
x.envp[1] = NULL;
x.envp[0] = getenv_raw("TMPDIR=");
x.envp[1] = getenv_raw("PATH=");
x.envp[2] = getenv_raw("LD_LIBRARY_PATH=");
x.envp[3] = NULL;
build_auxv(x.auxv, sizeof(x.auxv)/sizeof(uint32_t));
int32_t argc = 1;
@ -68,7 +155,7 @@ static void wait_go_runtime() {
pthread_cond_wait(&go_started_cond, &go_started_mu);
}
pthread_mutex_unlock(&go_started_mu);
__android_log_print(ANDROID_LOG_INFO, "Go", "Runtime started");
LOG_INFO("runtime started");
}
pthread_t nativeactivity_t;