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Ensure that workers in fuzzers can create their own context #334

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Ensure that workers in fuzzers can create their own context #334

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23 changes: 17 additions & 6 deletions fuzz/fuzz_common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -28,24 +28,35 @@ void reset_nbinterrupts() {
nbinterrupts = 0;
}

JSContext *JS_NewCustomContext(JSRuntime *rt)
{
JSContext *ctx = JS_NewContext(rt);
if (!ctx)
return NULL;

JS_AddIntrinsicBigFloat(ctx);
JS_AddIntrinsicBigDecimal(ctx);
JS_AddIntrinsicOperators(ctx);
JS_EnableBignumExt(ctx, 1);

js_init_module_std(ctx, "std");
js_init_module_os(ctx, "os");
return ctx;
}

void test_one_input_init(JSRuntime *rt, JSContext *ctx) {
// 64 Mo
JS_SetMemoryLimit(rt, 0x4000000);
// 64 Kb
JS_SetMaxStackSize(rt, 0x10000);

JS_AddIntrinsicBigFloat(ctx);
JS_AddIntrinsicBigDecimal(ctx);
JS_AddIntrinsicOperators(ctx);
JS_EnableBignumExt(ctx, 1);
JS_SetModuleLoaderFunc(rt, NULL, js_module_loader, NULL);
JS_SetInterruptHandler(JS_GetRuntime(ctx), interrupt_handler, NULL);
js_std_set_worker_new_context_func(JS_NewCustomContext);
js_std_add_helpers(ctx, 0, NULL);

// Load os and std
js_std_init_handlers(rt);
js_init_module_std(ctx, "std");
js_init_module_os(ctx, "os");
const char *str = "import * as std from 'std';\n"
"import * as os from 'os';\n"
"globalThis.std = std;\n"
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1 change: 1 addition & 0 deletions fuzz/fuzz_common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,5 +18,6 @@

static int nbinterrupts = 0;

JSContext *JS_NewCustomContext(JSRuntime *rt);
void reset_nbinterrupts();
void test_one_input_init(JSRuntime *rt, JSContext *ctx);
2 changes: 1 addition & 1 deletion fuzz/fuzz_compile.c
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Expand Up @@ -27,7 +27,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
return 0;

JSRuntime *rt = JS_NewRuntime();
JSContext *ctx = JS_NewContext(rt);
JSContext *ctx = JS_NewCustomContext(rt);
test_one_input_init(rt, ctx);

uint8_t *null_terminated_data = malloc(size + 1);
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2 changes: 1 addition & 1 deletion fuzz/fuzz_eval.c
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Expand Up @@ -26,7 +26,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
return 0;

JSRuntime *rt = JS_NewRuntime();
JSContext *ctx = JS_NewContext(rt);
JSContext *ctx = JS_NewCustomContext(rt);
test_one_input_init(rt, ctx);

uint8_t *null_terminated_data = malloc(size + 1);
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