Building using IAR compiler

[rtphilipson]

Has anyone built mongoose using the IAR compiler? I'm using compiler version 9.10 and I've been able to compile as a library and include into my project. It seems to launch fine and I have a very simple HTTP server sample that just returns a simple string at the moment. I had to change the arch_freertos_lwip.h file as so;

#if defined(GNUC)
#include <sys/stat.h>
#include <sys/time.h>
#elif defined( IAR_SYSTEMS_ICC )
#include <time.h>
#include <stdlib.h>
#define MG_PUTCHAR(x) putchar(x)
#else
struct timeval {
time_t tv_sec;
long tv_usec;
};
#endif

I can connect to server and send an http request, but after returning the string I hit a hardfault. I'm still trying to track it down but it is an attempt to execute from address 0 so I'm assuming it's trying to access a pointer to a function that isn't initialized.

Thanks

[scaprile]

Can you try the example http-server code ?

[rtphilipson]

My current code is based on that, except the file system is still under development so instead of accessing a file in a directory, I'm just using mg_http_reply to send the string;

static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data)
{

if (ev == MG_EV_HTTP_MSG) {
struct mg_http_message *hm = (struct mg_http_message *)ev_data, tmp = {0};
struct mg_str unknown = mg_str_n("?", 1), *cl;
struct mg_http_serve_opts opts = {0};
if (mg_http_match_uri(hm, "/api/hello")) {
mg_http_reply(c, 200, "", "%s\n", "hello, world!"); // Serve dynamic content
} else {
mg_http_reply(c, 200, "", "%s\n", "Unknown"); // Serve
}
printf( "HTTP Response Complete\n" );

//opts.root_dir = s_root_dir;
//opts.ssi_pattern = s_ssi_pattern;
//mg_http_serve_dir(c, hm, &opts);
//mg_http_parse((char *) c->send.buf, c->send.len, &tmp);
//cl = mg_http_get_header(&tmp, "Content-Length");
//if (cl == NULL) cl = &unknown;
//printf(  "%.*s %.*s %.*s %.*s", (int) hm->method.len, hm->method.ptr,
//         (int) hm->uri.len, hm->uri.ptr, (int) tmp.uri.len, tmp.uri.ptr,
//         (int) cl->len, cl->ptr);

}
(void) fn_data;

The code generally gets through about half way through printing "HtTP Response Complete" when the HardFault happens

[scaprile]

I would suggest you increase verbosity mg_log_set("2"); (or 3, or 4) and use MG_INFO(("HTTP Response Complete")); instead of printf(), just to have a bit more control.
Try to get the reason of that hardfault. Is it a Cortex-M0(+) ?

[rtphilipson]

It's an M7. The fault is;
Hardfault Exception
The processor has escalated a configurable-priority exception to HardFault.
An instruction executed with an invalid EPSR.T or EPSR.IT field (CFSR.INVSTATE).
Exception occurred at PC = 0x0, LR = 0x0

The log is set to 2, but the debug logging doesn't seem to be working (I guess I should back up and did into that a little further). I have MG_PUTCHAR set to putchar(x) and I've verified that putchar works, so I'm not sure what is going on there

[scaprile]

debug level is "3", pay attention to the double quote.

[rtphilipson]

OK, I see. I set the debug level to "3" and I got this;

5280 4 sock.c:608:mg_mgr_poll 1 -- tchrc
566d 4 sock.c:608:mg_mgr_poll 1 -- tchrc
5a5a 4 sock.c:608:mg_mgr_poll 1 -- tchrc
5e47 4 sock.c:608:mg_mgr_poll 1 -- tchrc
6234 4 sock.c:608:mg_mgr_poll 1 -- tchrc
6284 4 sock.c:608:mg_mgr_poll 1 r- tchrc
6284 3 sock.c:397:accept_conn 2 accepted 10.101.165.102:2573
6284 4 sock.c:608:mg_mgr_poll 2 r- tchrc
6289 3 sock.c:291:read_conn 2 0x1 0:0 83 err 0
628e 2 HttpProcess.cpp:51:cb HTTP Response Complete

6293 4 sock.c:

This was response to; curl http://10.101.165.101:8000

[rtphilipson]

OK. We can close this. Increasing the stack size in the thread I'm running it in fixed the issue

Thanks

[cpq]

That smells like a stack smashing. How much stack your HTTP task has? Give it something like 8k.
For the file system, use an embedded FS, you can just get the ready-to-go FS file from examples/device-dashboard

[rtphilipson]

Yeah, I responded to scaprile that it ended up being a stack size issue. I just increased it to 4k though. Interesting that you suggested 8. I may need to consider that. Trying to figure out how to close this. I guess just mark your response as answer should do it.