OpenHarmony/third_party_mesa3d
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implement full reference counting for vertex/fragment programs

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Use _mesa_reference_vert/fragprog() wherever we assign program pointers.
Fixes a memory corruption bug found with glean/api2 test.
This commit is contained in:
Brian
2008-05-06 23:08:51 -06:00
parent 38c5b14853
commit df43fb661b
8 changed files with 141 additions and 66 deletions
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102
src/mesa/shader/program.c
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@@ -59,9 +59,9 @@ _mesa_init_program(GLcontext *ctx)
ctx->VertexProgram.Enabled = GL_FALSE;
ctx->VertexProgram.PointSizeEnabled = GL_FALSE;
ctx->VertexProgram.TwoSideEnabled = GL_FALSE;
ctx->VertexProgram.Current = (struct gl_vertex_program *) ctx->Shared->DefaultVertexProgram;
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
ctx->Shared->DefaultVertexProgram);
assert(ctx->VertexProgram.Current);
ctx->VertexProgram.Current->Base.RefCount++;
for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
ctx->VertexProgram.TrackMatrix[i] = GL_NONE;
ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV;
@@ -70,7 +70,8 @@ _mesa_init_program(GLcontext *ctx)
#if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
ctx->FragmentProgram.Enabled = GL_FALSE;
ctx->FragmentProgram.Current = (struct gl_fragment_program *) ctx->Shared->DefaultFragmentProgram;
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
ctx->Shared->DefaultFragmentProgram);
assert(ctx->FragmentProgram.Current);
ctx->FragmentProgram.Current->Base.RefCount++;
#endif
@@ -92,18 +93,10 @@ void
_mesa_free_program_data(GLcontext *ctx)
{
#if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
if (ctx->VertexProgram.Current) {
ctx->VertexProgram.Current->Base.RefCount--;
if (ctx->VertexProgram.Current->Base.RefCount <= 0)
ctx->Driver.DeleteProgram(ctx, &(ctx->VertexProgram.Current->Base));
}
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, NULL);
#endif
#if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
if (ctx->FragmentProgram.Current) {
ctx->FragmentProgram.Current->Base.RefCount--;
if (ctx->FragmentProgram.Current->Base.RefCount <= 0)
ctx->Driver.DeleteProgram(ctx, &(ctx->FragmentProgram.Current->Base));
}
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, NULL);
#endif
/* XXX probably move this stuff */
#if FEATURE_ATI_fragment_shader
@@ -365,6 +358,59 @@ _mesa_lookup_program(GLcontext *ctx, GLuint id)
}
/**
* Reference counting for vertex/fragment programs
*/
void
_mesa_reference_program(GLcontext *ctx,
struct gl_program **ptr,
struct gl_program *prog)
{
assert(ptr);
if (*ptr && prog) {
/* sanity check */
ASSERT((*ptr)->Target == prog->Target);
}
if (*ptr == prog) {
return; /* no change */
}
if (*ptr) {
GLboolean deleteFlag;
/*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/
#if 0
printf("Program %p %u 0x%x Refcount-- to %d\n",
*ptr, (*ptr)->Id, (*ptr)->Target, (*ptr)->RefCount - 1);
#endif
ASSERT((*ptr)->RefCount > 0);
(*ptr)->RefCount--;
deleteFlag = ((*ptr)->RefCount == 0);
/*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/
if (deleteFlag) {
ASSERT(ctx);
ctx->Driver.DeleteProgram(ctx, *ptr);
}
*ptr = NULL;
}
assert(!*ptr);
if (prog) {
/*_glthread_LOCK_MUTEX(prog->Mutex);*/
prog->RefCount++;
#if 0
printf("Program %p %u 0x%x Refcount++ to %d\n",
prog, prog->Id, prog->Target, prog->RefCount);
#endif
/*_glthread_UNLOCK_MUTEX(prog->Mutex);*/
}
*ptr = prog;
}
/**
* Return a copy of a program.
* XXX Problem here if the program object is actually OO-derivation
@@ -380,8 +426,9 @@ _mesa_clone_program(GLcontext *ctx, const struct gl_program *prog)
return NULL;
assert(clone->Target == prog->Target);
assert(clone->RefCount == 1);
clone->String = (GLubyte *) _mesa_strdup((char *) prog->String);
clone->RefCount = 1;
clone->Format = prog->Format;
clone->Instructions = _mesa_alloc_instructions(prog->NumInstructions);
if (!clone->Instructions) {
@@ -513,9 +560,9 @@ _mesa_BindProgram(GLenum target, GLuint id)
/* Bind a default program */
newProg = NULL;
if (target == GL_VERTEX_PROGRAM_ARB) /* == GL_VERTEX_PROGRAM_NV */
newProg = ctx->Shared->DefaultVertexProgram;
newProg = &ctx->Shared->DefaultVertexProgram->Base;
else
newProg = ctx->Shared->DefaultFragmentProgram;
newProg = &ctx->Shared->DefaultFragmentProgram->Base;
}
else {
/* Bind a user program */
@@ -543,26 +590,16 @@ _mesa_BindProgram(GLenum target, GLuint id)
return;
}
/* unbind/delete oldProg */
if (curProg->Id != 0) {
/* decrement refcount on previously bound fragment program */
curProg->RefCount--;
/* and delete if refcount goes below one */
if (curProg->RefCount <= 0) {
/* the program ID was already removed from the hash table */
ctx->Driver.DeleteProgram(ctx, curProg);
}
}
/* bind newProg */
if (target == GL_VERTEX_PROGRAM_ARB) { /* == GL_VERTEX_PROGRAM_NV */
ctx->VertexProgram.Current = (struct gl_vertex_program *) newProg;
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
(struct gl_vertex_program *) newProg);
}
else if (target == GL_FRAGMENT_PROGRAM_NV ||
target == GL_FRAGMENT_PROGRAM_ARB) {
ctx->FragmentProgram.Current = (struct gl_fragment_program *) newProg;
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
(struct gl_fragment_program *) newProg);
}
newProg->RefCount++;
/* Never null pointers */
ASSERT(ctx->VertexProgram.Current);
@@ -620,10 +657,7 @@ _mesa_DeletePrograms(GLsizei n, const GLuint *ids)
}
/* The ID is immediately available for re-use now */
_mesa_HashRemove(ctx->Shared->Programs, ids[i]);
prog->RefCount--;
if (prog->RefCount <= 0) {
ctx->Driver.DeleteProgram(ctx, prog);
}
_mesa_reference_program(ctx, &prog, NULL);
}
}
}