>> With the *exact* source code used in getinmemory.c or after you've C++ified it
to your liking?

Yes, the *EXACT* getinmemory.c. I've put together a simplified test case here below that exhibits the same segmentation-fault.

It's self-contained:
=============================================

#include <curl/curl.h>
#include <curl/easy.h>
#include <iostream>
#include <fstream>
#include <cstring>
#include <stdlib.h>
#include <assert.h>

using namespace std;

struct MemoryStruct {
  char *memory;
  size_t size;
} ;
 
 
static size_t
WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *data)
{
    size_t realsize = size * nmemb;
    struct MemoryStruct *mem = (struct MemoryStruct *)data;
 
    // For Debugging
    cout << (void *)(mem->memory) << " =mem->memory\t\t"
        << mem->size << " =mem->size\t"
        << (mem->size+realsize+1) << " =mem->size+realsize+1\n";

    mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);

    // For Debugging
    cout << "realloc: done!\n";

    if (mem->memory == NULL) {
        /* out of memory! */
        printf("not enough memory (realloc returned NULL)\n");
        exit(EXIT_FAILURE);
    }
 
    memcpy(&(mem->memory[mem->size]), ptr, realsize);
    mem->size += realsize;
    mem->memory[mem->size] = 0;
 
    return realsize;
}

int main(void)
{

CURL *sessionA;
CURLcode result;

FILE *NULLFILE, *CookieFile, *HeaderFile, *WpageFile;

const char *CookiesBag = "Cookies.txt";

CookieFile = fopen(CookiesBag,"w");
HeaderFile = fopen("Header.html","w");
WpageFile = fopen("Wpage.html", "w");
NULLFILE = fopen("/dev/null", "w");

char *curlv;
curlv = curl_version();
cout << curlv << " (curl_version)\n\n";

curl_global_init(CURL_GLOBAL_ALL);

sessionA = curl_easy_init();

if(sessionA) {

    // PREPARATION & KickOff
    //
    curl_easy_setopt(sessionA, CURLOPT_VERBOSE, 0);
    curl_easy_setopt(sessionA, CURLOPT_FOLLOWLOCATION, 1);
    curl_easy_setopt(sessionA, CURLOPT_COOKIELIST, "ALL"); //erase "ALL" cookies

    curl_easy_setopt(sessionA, CURLOPT_COOKIEJAR, CookiesBag);
    curl_easy_setopt(sessionA, CURLOPT_COOKIEFILE, CookiesBag);

    curl_easy_setopt(sessionA, CURLOPT_WRITEDATA, NULLFILE);
    curl_easy_setopt(sessionA, CURLOPT_WRITEHEADER, HeaderFile);

    // from getinmemory.c
    //
    struct MemoryStruct chunk;
    chunk.memory = (char *)malloc(1); /* will be grown as needed by the realloc above */
    chunk.size = 0; /* no data at this point */

    // Underlying Snapshot
    //
    // curl_easy_setopt(sessionA, CURLOPT_WRITEDATA, WpageFile);
    curl_easy_setopt(sessionA, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
    curl_easy_setopt(sessionA, CURLOPT_WRITEDATA, (void *)&chunk);

    curl_easy_setopt(sessionA, CURLOPT_URL, "http://www.yahoo.com/");

    // For Debugging
    cout << (void *)chunk.memory << " =chunk.memory\t\t"
        << chunk.size << " =chunk.size\n";

    result = curl_easy_perform(sessionA);

    curl_easy_cleanup(sessionA);
    }

return 0;
}

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Received on 2011-06-05