From 4185037af2d89c5b245646f5e4a7c6dc946cae43 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <skeggsb@gmail.com>
Date: Tue, 20 Mar 2007 15:52:57 +1100
Subject: [PATCH] nouveau: fail translate if we use too many params somehow

---
 src/mesa/drivers/dri/nouveau/nouveau_shader.c |  4 ++-
 src/mesa/drivers/dri/nouveau/nouveau_shader.h |  7 ++++++
 .../drivers/dri/nouveau/nouveau_shader_0.c    | 25 ++++++++++++++++---
 3 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_shader.c b/src/mesa/drivers/dri/nouveau/nouveau_shader.c
index 9cb837ff3b7..3d5b6843a15 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_shader.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_shader.c
@@ -96,7 +96,9 @@ nouveauProgramStringNotify(GLcontext *ctx, GLenum target,
 
    if (nvs->translated)
       FREE(nvs->program);
-   nvs->translated = 0;
+
+   nvs->error      = GL_FALSE;
+   nvs->translated = GL_FALSE;
 
    _tnl_program_string(ctx, target, prog);
 }
diff --git a/src/mesa/drivers/dri/nouveau/nouveau_shader.h b/src/mesa/drivers/dri/nouveau/nouveau_shader.h
index 56ae270764b..7125a2ae821 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_shader.h
+++ b/src/mesa/drivers/dri/nouveau/nouveau_shader.h
@@ -51,6 +51,7 @@ typedef struct _nouveauShader {
    nvsFunc *func;
 
    /* State of the final program */
+   GLboolean error;
    GLboolean translated;
    GLboolean on_hardware;
    unsigned int *program;
@@ -424,6 +425,12 @@ nvsSwizzle(nvsRegister reg, nvsSwzComp x, nvsSwzComp y,
    return reg;
 }
 
+#define nvsProgramError(nvs,fmt,args...) do {                           \
+	fprintf(stderr, "nvsProgramError (%s): "fmt, __func__, ##args); \
+	(nvs)->error = GL_TRUE;                                         \
+	(nvs)->translated = GL_FALSE;                                   \
+} while(0)
+
 extern GLboolean nvsUpdateShader(GLcontext *ctx, nouveauShader *nvs);
 extern void nvsDisasmHWShader(nvsPtr);
 extern void nvsDumpFragmentList(nvsFragmentHeader *f, int lvl);
diff --git a/src/mesa/drivers/dri/nouveau/nouveau_shader_0.c b/src/mesa/drivers/dri/nouveau/nouveau_shader_0.c
index 0308a6c3976..7c2e2b9443b 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_shader_0.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_shader_0.c
@@ -924,7 +924,7 @@ pass0_rebase_mesa_consts(nouveauShader *nvs)
 	}
 }
 
-static void
+static GLboolean
 pass0_resolve_mesa_consts(nouveauShader *nvs)
 {
 	struct pass0_rec *rec = nvs->pass_rec;
@@ -945,6 +945,11 @@ pass0_resolve_mesa_consts(nouveauShader *nvs)
 	for (i=0; i<plist->NumParameters; i++) {
 		int hw = rec->mesa_const_base + i;
 
+		if (hw > NVS_MAX_CONSTS) {
+			nvsProgramError(nvs, "hw = %d > NVS_MAX_CONSTS!\n", hw);
+			return GL_FALSE;
+		}
+
 		switch (plist->Parameters[i].Type) {
 		case PROGRAM_NAMED_PARAM:
 		case PROGRAM_STATE_VAR:
@@ -958,10 +963,13 @@ pass0_resolve_mesa_consts(nouveauShader *nvs)
 			COPY_4V(nvs->params[hw].val, plist->ParameterValues[i]);
 			break;
 		default:
-			assert(0);
-			break;
+			nvsProgramError(nvs, "hit bad type=%d on param %d\n",
+					plist->Parameters[i].Type, i);
+			return GL_FALSE;
 		}
 	}
+
+	return GL_TRUE;
 }
 
 GLboolean
@@ -976,6 +984,14 @@ nouveau_shader_pass0(GLcontext *ctx, nouveauShader *nvs)
 
 	NVSDBG("start: nvs=%p\n", nvs);
 
+	/* Previously detected an error, and haven't recieved new program
+	 * string, so fail immediately.
+	 */
+	if (nvs->error) {
+		NVSDBG("failed previous compile attempt, not retrying\n");
+		return GL_FALSE;
+	}
+
 	rec = CALLOC_STRUCT(pass0_rec);
 	if (!rec)
 		return GL_FALSE;
@@ -1020,7 +1036,8 @@ nouveau_shader_pass0(GLcontext *ctx, nouveauShader *nvs)
 
 	ret = pass0_translate_instructions(nvs, 0, 0, nvs->program_tree);
 	if (ret)
-		pass0_resolve_mesa_consts(nvs);
+		ret = pass0_resolve_mesa_consts(nvs);	
+	
 	/*XXX: if (!ret) DESTROY TREE!!! */
 
 	FREE(rec);
-- 
2.30.2