Yes, LD_PRELOAD only works with dynamically linked libraries.
On Thursday, 12 February 2015 07:05:01 UTC+1, cinyoung hur wrote:
>
> Hello,
>
> I'm testing addon with LD_PRELOAD hooking.
>
> In the test, I made hooking object for fopen call.
> When I test with this example, fopen hooking worked.
>
> #include <stdio.h>
>
> int main()
> {}
> // ld_preload test
> FILE* fd = NULL;
> printf("Calling the fopen() function. \n");
> fd = fopen("test.txt", "r");
> if(!fd) {
> printf("ok\n");
>
> }
> printf("fopen() succeeded\n");
> }
>
> But, if I apply this within node addons, hooking didn't work.
>
> NAN_METHOD(MyObject::New) {
> NanScope();
>
> if (args.IsConstructCall()) {
> // Invoked as constructor: `new MyObject(...)`
> MyObject* obj = new MyObject();
> obj->Wrap(args.This());
>
> // ld_preload test
> FILE* fd = NULL;
> printf("Calling the fopen() function. \n");
> fd = fopen("test.txt", "r");
> if(!fd) {
> printf("null\n");
>
> }
> printf("fopen() succeeded\n");
>
> NanReturnValue(args.This());
> }
> }
>
>
> Node addon documents say that Node statically compiles all its
> dependencies into the executable.
> http://nodejs.org/docs/latest/api/addons.html
>
> Is that why LD_PRELOAD is not working?
> Please guide me to solve this problem.
>
>
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