X-Git-Url: http://git.tdb.fi/?p=gldbg.git;a=blobdiff_plain;f=source%2Fglwrap.c;h=c70b308384b339888dc4ab4527fc7a86df4fa4dc;hp=10bfc77fcb12cd56f21149444593f8df57de8d52;hb=ea3d851aa52e999b1c5a5fa52c97ff5019756c0e;hpb=7642653a18f7464dd093a93a1247b8f18e53cd1a

diff --git a/source/glwrap.c b/source/glwrap.c
index 10bfc77..c70b308 100644
--- a/source/glwrap.c
+++ b/source/glwrap.c
@@ -11,6 +11,14 @@ Distributed under the GPL
 #include <errno.h>
 #include <dlfcn.h>
 #include <fcntl.h>
+#include <signal.h>
+#include "breakpoint.h"
+#include "functions.h"
+#include "packet.h"
+
+static unsigned char breakpoints[N_FUNCS] = { };
+static char break_any = 0;
+static char hold = 0;
 
 static const char *get_lib_names(void)
 {
@@ -102,3 +110,86 @@ int get_out_fd(void)
 
 	return fd;
 }
+
+int get_in_fd(void)
+{
+	static int fd = -1;
+
+	if(fd<0)
+	{
+		const char *var = getenv("GLWRAP_CTRL_FD");
+		if(var)
+			fd = strtol(var, NULL, 0);
+		else
+			fd = 0;
+	}
+
+	return fd;
+}
+
+static void receive_gldBreak(GlPacket *pkt)
+{
+	unsigned short func;
+	unsigned char flags_set;
+	unsigned char flags_clr;
+
+	packet_read_short(pkt, (short *)&func);
+	packet_read_char(pkt, (char *)&flags_set);
+	packet_read_char(pkt, (char *)&flags_clr);
+
+	if(func)
+	{
+		breakpoints[func] &= ~flags_clr;
+		breakpoints[func] |= flags_set;
+	}
+	else
+		break_any = flags_set;
+}
+
+static void receive_gldHold(GlPacket *pkt __attribute__((unused)))
+{
+	hold = 1;
+}
+
+static void receive(void)
+{
+	GlPacket *pkt;
+
+	while((pkt = packet_receive(get_in_fd())))
+	{
+		unsigned short func;
+
+		packet_read_short(pkt, (short *)&func);
+		switch(func)
+		{
+		case FUNC_GLDBREAK: receive_gldBreak(pkt); break;
+		case FUNC_GLDHOLD: receive_gldHold(pkt); break;
+		default:;
+		}
+	}
+}
+
+void tracepoint(unsigned short func, int flag)
+{
+	receive();
+
+	if((breakpoints[func]|break_any)&flag)
+	{
+		GlPacket *pkt;
+
+		pkt = packet_begin(FUNC_GLDBREAK);
+		packet_write_short(pkt, func);
+		packet_send(pkt, get_out_fd());
+
+		break_any = 0;
+
+		while(1)
+		{
+			hold = 0;
+			raise(SIGTRAP);
+			receive();
+			if(!hold)
+				break;
+		}
+	}
+}