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try and print some information when a crash happens #4392

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67 changes: 67 additions & 0 deletions src/bflib_render_trig.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3005,12 +3005,36 @@ void trig_render_md09(struct TrigLocalRend *tlr)
}
}

#ifdef WIN32

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <excpt.h>

static long CALLBACK ehandler(EXCEPTION_POINTERS *)
{
return EXCEPTION_EXECUTE_HANDLER;
}

static bool pointer_is_valid(const void *ptr)
{
MEMORY_BASIC_INFORMATION mbi;
if (VirtualQuery(ptr, &mbi, sizeof(mbi)) != 0) {
return mbi.State == MEM_COMMIT;
}
return false;
}

#endif

void trig_render_md10(struct TrigLocalRend *tlr)
{
struct PolyPoint *polygon_point;
unsigned char *m;
unsigned char *f;
long texture_v_step_fixed;
long orig_render_height = INT_MAX;
bool done = false;

m = vec_map;
f = pixmap.fade_tables;
Expand All @@ -3019,6 +3043,10 @@ void trig_render_md10(struct TrigLocalRend *tlr)
ERRORLOG("global arrays not set: 0x%p 0x%p 0x%p", m, f, polygon_point);
return;
}
#ifdef WIN32
__try1 (ehandler) {
orig_render_height = tlr->render_height;
#endif
texture_v_step_fixed = tlr->v_step << 16;

for (; tlr->render_height; tlr->render_height--, polygon_point++)
Expand Down Expand Up @@ -3095,6 +3123,45 @@ void trig_render_md10(struct TrigLocalRend *tlr)
colM = ((colH & 0xFF) << 8) + (colL & 0xFF);
}
}
#ifdef WIN32
done = true;
} __except1 {
if (done) return;
ERRORLOG("trig_render_md10: crashed");
if (pointer_is_valid(tlr)) {
ERRORLOG("tlr: 0x%p, screen_buffer_ptr: 0x%p%s, orig_render_height %ld, render_height %ld, u_step %ld, v_step %ld, shade_step %ld",
tlr,
tlr->screen_buffer_ptr,
pointer_is_valid(tlr->screen_buffer_ptr) ? "" : " invalid",
orig_render_height,
tlr->render_height,
tlr->u_step,
tlr->v_step,
tlr->shade_step
);
ERRORLOG("polyscans: 0x%p%s, vec_screen_width: %ld, vec_window_width: %ld",
polyscans,
pointer_is_valid(polyscans) ? "" : " invalid",
vec_screen_width,
vec_window_width
);
} else {
ERRORLOG("tlr: 0x%p (invalid)", tlr);
}
if (pointer_is_valid(polygon_point)) {
ERRORLOG("polygon_point: 0x%p, X: %ld, Y: %ld, U: %ld, V: %ld, S: %ld",
polygon_point,
polygon_point->X,
polygon_point->Y,
polygon_point->U,
polygon_point->V,
polygon_point->S
);
} else {
ERRORLOG("polygon_point: 0x%p (invalid)", polygon_point);
}
}
#endif
}

void trig_render_md12(struct TrigLocalRend *tlr)
Expand Down