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* [dpdk-stable] patch 'eal/windows: fix build with MinGW-w64 8' has been queued to stable release 20.11.1
@ 2021-02-05 11:14 luca.boccassi
  2021-02-05 11:14 ` [dpdk-stable] patch 'bus/pci: " luca.boccassi
                   ` (274 more replies)
  0 siblings, 275 replies; 312+ messages in thread
From: luca.boccassi @ 2021-02-05 11:14 UTC (permalink / raw)
  To: Dmitry Kozlyuk; +Cc: Thomas Monjalon, dpdk stable

Hi,

FYI, your patch has been queued to stable release 20.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/07/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/ab9b79cd737dabf9eb032ca1f328e79f5df85397

Thanks.

Luca Boccassi

---
From ab9b79cd737dabf9eb032ca1f328e79f5df85397 Mon Sep 17 00:00:00 2001
From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Date: Tue, 1 Dec 2020 19:39:58 +0300
Subject: [PATCH] eal/windows: fix build with MinGW-w64 8

[ upstream commit 93bf432dd58236235e8a930a108dbcaee81fc5fc ]

MinGW-w64 above 8.0.0 exposes VirtualAlloc2() API in headers, but lacks
it in import libraries. Hence, availability of this API at compile-time
can't be used to choose between locating VirtualAlloc2() manually or
relying on the dynamic linker.

Fix redefinition compile-time errors.
Always link VirtualAlloc2() when using GCC.

Fixes: 2a5d547a4a9b ("eal/windows: implement basic memory management")

Reported-by: Thomas Monjalon <thomas@monjalon.net>
Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Tested-by: Thomas Monjalon <thomas@monjalon.net>
---
 lib/librte_eal/windows/eal_memory.c | 42 +++++++++++++++--------------
 1 file changed, 22 insertions(+), 20 deletions(-)

diff --git a/lib/librte_eal/windows/eal_memory.c b/lib/librte_eal/windows/eal_memory.c
index 7f8d3c2fa4..2cf5a5e649 100644
--- a/lib/librte_eal/windows/eal_memory.c
+++ b/lib/librte_eal/windows/eal_memory.c
@@ -18,13 +18,12 @@
 #include <rte_virt2phys.h>
 
 /* MinGW-w64 headers lack VirtualAlloc2() in some distributions.
- * Provide a copy of definitions and code to load it dynamically.
  * Note: definitions are copied verbatim from Microsoft documentation
  * and don't follow DPDK code style.
- *
- * MEM_RESERVE_PLACEHOLDER being defined means VirtualAlloc2() is present too.
  */
-#ifndef MEM_PRESERVE_PLACEHOLDER
+#ifndef MEM_EXTENDED_PARAMETER_TYPE_BITS
+
+#define MEM_EXTENDED_PARAMETER_TYPE_BITS 4
 
 /* https://docs.microsoft.com/en-us/windows/win32/api/winnt/ne-winnt-mem_extended_parameter_type */
 typedef enum MEM_EXTENDED_PARAMETER_TYPE {
@@ -37,8 +36,6 @@ typedef enum MEM_EXTENDED_PARAMETER_TYPE {
 	MemExtendedParameterMax
 } *PMEM_EXTENDED_PARAMETER_TYPE;
 
-#define MEM_EXTENDED_PARAMETER_TYPE_BITS 4
-
 /* https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-mem_extended_parameter */
 typedef struct MEM_EXTENDED_PARAMETER {
 	struct {
@@ -54,6 +51,8 @@ typedef struct MEM_EXTENDED_PARAMETER {
 	} DUMMYUNIONNAME;
 } MEM_EXTENDED_PARAMETER, *PMEM_EXTENDED_PARAMETER;
 
+#endif /* defined(MEM_EXTENDED_PARAMETER_TYPE_BITS) */
+
 /* https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualalloc2 */
 typedef PVOID (*VirtualAlloc2_type)(
 	HANDLE                 Process,
@@ -65,17 +64,19 @@ typedef PVOID (*VirtualAlloc2_type)(
 	ULONG                  ParameterCount
 );
 
-/* VirtualAlloc2() flags. */
+/* MinGW-w64 distributions, even those that declare VirtualAlloc2(),
+ * lack it in import libraries, which results in a failure at link time.
+ * Link it dynamically in such case.
+ */
+static VirtualAlloc2_type VirtualAlloc2_ptr;
+
+#ifdef RTE_TOOLCHAIN_GCC
+
 #define MEM_COALESCE_PLACEHOLDERS 0x00000001
 #define MEM_PRESERVE_PLACEHOLDER  0x00000002
 #define MEM_REPLACE_PLACEHOLDER   0x00004000
 #define MEM_RESERVE_PLACEHOLDER   0x00040000
 
-/* Named exactly as the function, so that user code does not depend
- * on it being found at compile time or dynamically.
- */
-static VirtualAlloc2_type VirtualAlloc2;
-
 int
 eal_mem_win32api_init(void)
 {
@@ -89,7 +90,7 @@ eal_mem_win32api_init(void)
 	int ret = 0;
 
 	/* Already done. */
-	if (VirtualAlloc2 != NULL)
+	if (VirtualAlloc2_ptr != NULL)
 		return 0;
 
 	library = LoadLibraryA(library_name);
@@ -98,9 +99,9 @@ eal_mem_win32api_init(void)
 		return -1;
 	}
 
-	VirtualAlloc2 = (VirtualAlloc2_type)(
+	VirtualAlloc2_ptr = (VirtualAlloc2_type)(
 		(void *)GetProcAddress(library, function));
-	if (VirtualAlloc2 == NULL) {
+	if (VirtualAlloc2_ptr == NULL) {
 		RTE_LOG_WIN32_ERR("GetProcAddress(\"%s\", \"%s\")\n",
 			library_name, function);
 
@@ -117,14 +118,15 @@ eal_mem_win32api_init(void)
 
 #else
 
-/* Stub in case VirtualAlloc2() is provided by the compiler. */
+/* Stub in case VirtualAlloc2() is provided by the toolchain. */
 int
 eal_mem_win32api_init(void)
 {
+	VirtualAlloc2_ptr = VirtualAlloc2;
 	return 0;
 }
 
-#endif /* defined(MEM_RESERVE_PLACEHOLDER) */
+#endif /* defined(RTE_TOOLCHAIN_GCC) */
 
 static HANDLE virt2phys_device = INVALID_HANDLE_VALUE;
 
@@ -278,7 +280,7 @@ eal_mem_reserve(void *requested_addr, size_t size, int flags)
 
 	process = GetCurrentProcess();
 
-	virt = VirtualAlloc2(process, requested_addr, size,
+	virt = VirtualAlloc2_ptr(process, requested_addr, size,
 		MEM_RESERVE | MEM_RESERVE_PLACEHOLDER, PAGE_NOACCESS,
 		NULL, 0);
 	if (virt == NULL) {
@@ -364,7 +366,7 @@ eal_mem_commit(void *requested_addr, size_t size, int socket_id)
 	}
 
 	flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
-	addr = VirtualAlloc2(process, requested_addr, size,
+	addr = VirtualAlloc2_ptr(process, requested_addr, size,
 		flags, PAGE_READWRITE, &param, param_count);
 	if (addr == NULL) {
 		/* Logging may overwrite GetLastError() result. */
@@ -406,7 +408,7 @@ eal_mem_decommit(void *addr, size_t size)
 	}
 
 	flags = MEM_RESERVE | MEM_RESERVE_PLACEHOLDER;
-	stub = VirtualAlloc2(
+	stub = VirtualAlloc2_ptr(
 		process, addr, size, flags, PAGE_NOACCESS, NULL, 0);
 	if (stub == NULL) {
 		/* We lost the race for the VA. */
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:29.417643482 +0000
+++ 0001-eal-windows-fix-build-with-MinGW-w64-8.patch	2021-02-05 11:18:28.582686848 +0000
@@ -1 +1 @@
-From 93bf432dd58236235e8a930a108dbcaee81fc5fc Mon Sep 17 00:00:00 2001
+From ab9b79cd737dabf9eb032ca1f328e79f5df85397 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 93bf432dd58236235e8a930a108dbcaee81fc5fc ]
+
@@ -15 +16,0 @@
-Cc: stable@dpdk.org

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