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[Fix, Test] (GLImpl, MG_Test): validate glFenceSync's condition/flags and glWaitSync's flags/timeout

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swung0x48
2026-08-20 05:08:11 -04:00
parent 9b37c77ae2
commit 916702629e
2 changed files with 63 additions and 0 deletions
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MobileGL/MG_Impl/GLImpl/Sync/GL_Sync.cpp
+29
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@@ -8,6 +8,7 @@
#include "GL_Sync.h"
#include <MG_Backend/BackendObjects.h>
#include <MG_State/GLState/Core.h>
namespace MobileGL::MG_Impl::GLImpl {
namespace {
@@ -35,6 +36,22 @@ namespace MobileGL::MG_Impl::GLImpl {
} // namespace
GLsync FenceSync(GLenum condition, GLbitfield flags) {
// GL 4.6 core 4.1.2: GL_SYNC_GPU_COMMANDS_COMPLETE is the only condition and the only
// legal flags value is zero; both violations return 0 rather than a handle. A caller that
// then hands the 0 back to glDeleteSync hits the glDeleteSync(0) no-op below.
if (condition != GL_SYNC_GPU_COMMANDS_COMPLETE) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"condition must be GL_SYNC_GPU_COMMANDS_COMPLETE."));
return nullptr;
}
if (flags != 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "flags must be zero."));
return nullptr;
}
auto* syncObject = new SyncObject;
syncObject->condition = condition;
syncObject->flags = flags;
@@ -64,6 +81,18 @@ namespace MobileGL::MG_Impl::GLImpl {
}
void WaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) {
// GL 4.6 core 4.1.2: the server-side wait takes no flags and no finite timeout - both
// arguments exist only to be forward-compatible, and anything else is INVALID_VALUE.
// Neither backend ever honored a nonzero timeout (DirectGLES hard-codes
// 0/GL_TIMEOUT_IGNORED, DirectVulkan's queue ordering makes the wait implicit), so
// rejecting the call loses no wait that used to happen.
if (flags != 0 || timeout != GL_TIMEOUT_IGNORED) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"flags must be zero and timeout must be GL_TIMEOUT_IGNORED."));
return;
}
const auto* syncObject = FindSyncObject(sync);
if (!syncObject) {
return;