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Implement module instance context APIs (#2436)

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Introduce module instance context APIs which can set one or more contexts created
by the embedder for a wasm module instance:
```C
    wasm_runtime_create_context_key
    wasm_runtime_destroy_context_key
    wasm_runtime_set_context
    wasm_runtime_set_context_spread
    wasm_runtime_get_context
```

And make libc-wasi use it and set wasi context as the first context bound to the wasm
module instance.

Also add samples.

Refer to https://github.com/bytecodealliance/wasm-micro-runtime/issues/2460.
This commit is contained in:
YAMAMOTO Takashi
2023-09-07 15:54:11 +09:00
committed by GitHub
parent af2f3c8759
commit 6c846acc59
35 changed files with 1190 additions and 56 deletions
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172
core/iwasm/common/wasm_native.c
View File

@ -6,6 +6,15 @@
#include "wasm_native.h"
#include "wasm_runtime_common.h"
#include "bh_log.h"
#if WASM_ENABLE_INTERP != 0
#include "../interpreter/wasm_runtime.h"
#endif
#if WASM_ENABLE_AOT != 0
#include "../aot/aot_runtime.h"
#endif
#if WASM_ENABLE_THREAD_MGR != 0
#include "../libraries/thread-mgr/thread_manager.h"
#endif
#if !defined(BH_PLATFORM_ZEPHYR) && !defined(BH_PLATFORM_ALIOS_THINGS) \
&& !defined(BH_PLATFORM_OPENRTOS) && !defined(BH_PLATFORM_ESP_IDF)
@ -22,6 +31,10 @@
static NativeSymbolsList g_native_symbols_list = NULL;
#if WASM_ENABLE_LIBC_WASI != 0
static void *g_wasi_context_key;
#endif /* WASM_ENABLE_LIBC_WASI */
uint32
get_libc_builtin_export_apis(NativeSymbol **p_libc_builtin_apis);
@ -394,6 +407,155 @@ wasm_native_unregister_natives(const char *module_name,
return false;
}
#if WASM_ENABLE_MODULE_INST_CONTEXT != 0
static uint32
context_key_to_idx(void *key)
{
bh_assert(key != NULL);
uint32 idx = (uint32)(uintptr_t)key;
bh_assert(idx > 0);
bh_assert(idx <= WASM_MAX_INSTANCE_CONTEXTS);
return idx - 1;
}
static void *
context_idx_to_key(uint32 idx)
{
bh_assert(idx < WASM_MAX_INSTANCE_CONTEXTS);
return (void *)(uintptr_t)(idx + 1);
}
typedef void (*dtor_t)(WASMModuleInstanceCommon *, void *);
static dtor_t g_context_dtors[WASM_MAX_INSTANCE_CONTEXTS];
static void
dtor_noop(WASMModuleInstanceCommon *inst, void *ctx)
{}
void *
wasm_native_create_context_key(void (*dtor)(WASMModuleInstanceCommon *inst,
void *ctx))
{
uint32 i;
for (i = 0; i < WASM_MAX_INSTANCE_CONTEXTS; i++) {
if (g_context_dtors[i] == NULL) {
if (dtor == NULL) {
dtor = dtor_noop;
}
g_context_dtors[i] = dtor;
return context_idx_to_key(i);
}
}
LOG_ERROR("failed to allocate instance context key");
return NULL;
}
void
wasm_native_destroy_context_key(void *key)
{
uint32 idx = context_key_to_idx(key);
bh_assert(g_context_dtors[idx] != NULL);
g_context_dtors[idx] = NULL;
}
static WASMModuleInstanceExtraCommon *
wasm_module_inst_extra_common(WASMModuleInstanceCommon *inst)
{
#if WASM_ENABLE_INTERP != 0
if (inst->module_type == Wasm_Module_Bytecode) {
return &((WASMModuleInstance *)inst)->e->common;
}
#endif
#if WASM_ENABLE_AOT != 0
if (inst->module_type == Wasm_Module_AoT) {
return &((AOTModuleInstanceExtra *)((AOTModuleInstance *)inst)->e)
->common;
}
#endif
bh_assert(false);
return NULL;
}
void
wasm_native_set_context(WASMModuleInstanceCommon *inst, void *key, void *ctx)
{
uint32 idx = context_key_to_idx(key);
WASMModuleInstanceExtraCommon *common = wasm_module_inst_extra_common(inst);
common->contexts[idx] = ctx;
}
void
wasm_native_set_context_spread(WASMModuleInstanceCommon *inst, void *key,
void *ctx)
{
#if WASM_ENABLE_THREAD_MGR != 0
wasm_cluster_set_context(inst, key, ctx);
#else
wasm_native_set_context(inst, key, ctx);
#endif
}
void *
wasm_native_get_context(WASMModuleInstanceCommon *inst, void *key)
{
uint32 idx = context_key_to_idx(key);
WASMModuleInstanceExtraCommon *common = wasm_module_inst_extra_common(inst);
return common->contexts[idx];
}
void
wasm_native_call_context_dtors(WASMModuleInstanceCommon *inst)
{
WASMModuleInstanceExtraCommon *common = wasm_module_inst_extra_common(inst);
uint32 i;
for (i = 0; i < WASM_MAX_INSTANCE_CONTEXTS; i++) {
dtor_t dtor = g_context_dtors[i];
if (dtor != NULL) {
dtor(inst, common->contexts[i]);
}
}
}
void
wasm_native_inherit_contexts(WASMModuleInstanceCommon *child,
WASMModuleInstanceCommon *parent)
{
WASMModuleInstanceExtraCommon *parent_common =
wasm_module_inst_extra_common(parent);
WASMModuleInstanceExtraCommon *child_common =
wasm_module_inst_extra_common(child);
bh_memcpy_s(child_common->contexts,
sizeof(*child_common->contexts) * WASM_MAX_INSTANCE_CONTEXTS,
parent_common->contexts,
sizeof(*parent_common->contexts) * WASM_MAX_INSTANCE_CONTEXTS);
}
#endif /* WASM_ENABLE_MODULE_INST_CONTEXT != 0 */
#if WASM_ENABLE_LIBC_WASI != 0
WASIContext *
wasm_runtime_get_wasi_ctx(WASMModuleInstanceCommon *module_inst_comm)
{
return wasm_native_get_context(module_inst_comm, g_wasi_context_key);
}
void
wasm_runtime_set_wasi_ctx(WASMModuleInstanceCommon *module_inst_comm,
WASIContext *wasi_ctx)
{
return wasm_native_set_context(module_inst_comm, g_wasi_context_key,
wasi_ctx);
}
static void
wasi_context_dtor(WASMModuleInstanceCommon *inst, void *ctx)
{
if (ctx == NULL) {
return;
}
wasm_runtime_destroy_wasi(inst);
}
#endif /* end of WASM_ENABLE_LIBC_WASI */
bool
wasm_native_init()
{
@ -420,6 +582,10 @@ wasm_native_init()
#endif /* WASM_ENABLE_SPEC_TEST */
#if WASM_ENABLE_LIBC_WASI != 0
g_wasi_context_key = wasm_native_create_context_key(wasi_context_dtor);
if (g_wasi_context_key == NULL) {
goto fail;
}
n_native_symbols = get_libc_wasi_export_apis(&native_symbols);
if (!wasm_native_register_natives("wasi_unstable", native_symbols,
n_native_symbols))
@ -507,6 +673,12 @@ wasm_native_destroy()
{
NativeSymbolsNode *node, *node_next;
#if WASM_ENABLE_LIBC_WASI != 0
if (g_wasi_context_key != NULL) {
wasm_native_destroy_context_key(g_wasi_context_key);
g_wasi_context_key = NULL;
}
#endif
#if WASM_ENABLE_LIB_PTHREAD != 0
lib_pthread_destroy();
#endif