From fbb3c8273f339b38edb95f3ddf20aec30cd9b52e Mon Sep 17 00:00:00 2001
From: Christian Gmeiner <cgmeiner@igalia.com>
Date: Mon, 3 Nov 2025 16:22:18 +0100
Subject: [PATCH 1/2] util/log: Add mesa_log_stream_to_file()

This function wraps a log_stream into a FILE* pointer, enabling the use
of standard fprintf() and other FILE-based functions to write to Mesa's
logging system.

The implementation uses platform-specific custom stream APIs:
- fopencookie() on glibc-based Linux systems
- funopen() on Android, macOS, and BSD systems

Data written to the FILE* is automatically buffered and flushed through
the log_stream infrastructure, with proper line splitting and logging
level handling. Closing the FILE* automatically destroys the underlying
log_stream.

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
---
 src/util/log.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/util/log.h |  7 +++++
 2 files changed, 81 insertions(+)

diff --git a/src/util/log.c b/src/util/log.c
index 4022b6b556e..4fbbac599e4 100644
--- a/src/util/log.c
+++ b/src/util/log.c
@@ -554,3 +554,77 @@ _mesa_log_multiline(enum mesa_log_level level, const char *tag, const char *line
    mesa_log_stream_flush(&tmp, 0);
    free(tmp.msg);
 }
+
+#if DETECT_OS_LINUX && !DETECT_OS_ANDROID
+/* glibc-based Linux (has fopencookie) */
+static ssize_t
+log_stream_write_cookie(void *cookie, const char *buf, size_t size)
+{
+   mesa_log_stream_printf(cookie, "%.*s", (int)size, buf);
+
+   return size;
+}
+
+static int
+log_stream_close_cookie(void *cookie)
+{
+   mesa_log_stream_destroy(cookie);
+
+   return 0;
+}
+
+FILE *
+mesa_log_stream_to_file(struct log_stream *stream)
+{
+   if (!stream)
+      return NULL;
+
+   static const cookie_io_functions_t funcs = {
+      .read = NULL,
+      .write = log_stream_write_cookie,
+      .seek = NULL,
+      .close = log_stream_close_cookie
+   };
+
+   return fopencookie(stream, "w", funcs);
+}
+#elif DETECT_OS_ANDROID || DETECT_OS_APPLE || DETECT_OS_BSD
+/* BSD-style (has funopen) */
+static int
+log_stream_write_func(void *cookie, const char *buf, int size)
+{
+   mesa_log_stream_printf(cookie, "%.*s", size, buf);
+
+   return size;
+}
+
+static int
+log_stream_close_func(void *cookie)
+{
+   mesa_log_stream_destroy(cookie);
+
+   return 0;
+}
+
+FILE *
+mesa_log_stream_to_file(struct log_stream *stream)
+{
+   if (!stream)
+      return NULL;
+
+   return funopen(stream,
+                  NULL,                      /* read */
+                  log_stream_write_func,     /* write */
+                  NULL,                      /* seek */
+                  log_stream_close_func);    /* close */
+}
+
+#else
+/* Unsupported platform */
+FILE *
+mesa_log_stream_to_file(struct log_stream *stream)
+{
+   (void)stream;
+   return NULL;
+}
+#endif
diff --git a/src/util/log.h b/src/util/log.h
index c1d9f806232..cb0ea4c4962 100644
--- a/src/util/log.h
+++ b/src/util/log.h
@@ -129,6 +129,13 @@ static inline void PRINTFLIKE(1, 2)
 __mesa_log_use_args(UNUSED const char *format, ...) { }
 #endif
 
+FILE *
+mesa_log_stream_to_file(struct log_stream *stream);
+
+#define mesa_log_file_streame() mesa_log_stream_to_file(mesa_log_streame())
+#define mesa_log_file_streamw() mesa_log_stream_to_file(mesa_log_streamw())
+#define mesa_log_file_streami() mesa_log_stream_to_file(mesa_log_streami())
+
 #ifdef __cplusplus
 }
 #endif

From 0610865eab8857f2780e09be783358bcc510b2dd Mon Sep 17 00:00:00 2001
From: Christian Gmeiner <cgmeiner@igalia.com>
Date: Mon, 3 Nov 2025 16:32:56 +0100
Subject: [PATCH 2/2] anv: Convert DEBUG_SHADERS_LINENO logging to use mesa_log

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
---
 src/intel/vulkan/anv_blorp.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/intel/vulkan/anv_blorp.c b/src/intel/vulkan/anv_blorp.c
index 0b186bd4354..4da75d4cbad 100644
--- a/src/intel/vulkan/anv_blorp.c
+++ b/src/intel/vulkan/anv_blorp.c
@@ -89,9 +89,14 @@ upload_blorp_shader(struct blorp_batch *batch, uint32_t stage,
    if (INTEL_DEBUG(DEBUG_SHADERS_LINENO)) {
       /* shader hash is zero in this context */
       if (!intel_shader_dump_filter) {
-         brw_disassemble_with_lineno(&device->physical->compiler->isa,
-                                     stage, -1, 0, kernel, 0,
-                                     bin->kernel.offset, stderr);
+         FILE *out = mesa_log_file_streami();
+
+         if (out) {
+            brw_disassemble_with_lineno(&device->physical->compiler->isa,
+                                       stage, -1, 0, kernel, 0,
+                                       bin->kernel.offset, out);
+            fclose(out);
+         }
       }
    }