Account for lack of mmap(), getpid(), and shared memory APIs in wasi.

FossilOrigin-Name: 80ff026fb4b2203eea53d4930c1e9bb138db951fb408739c7d5c776fb397b665

manifest

@@ -1,5 +1,5 @@
-C Preliminary\spatches\sto\sget\ssqlite3.c\sbuilding\sas-is\sin\sWASI\senvironments.
-D 2022-11-19T07:17:12.124
+C Account\sfor\slack\sof\smmap(),\sgetpid(),\sand\sshared\smemory\sAPIs\sin\swasi.
+D 2022-11-19T07:39:31.318
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -623,7 +623,7 @@ F src/os.h 1ff5ae51d339d0e30d8a9d814f4b8f8e448169304d83a7ed9db66a65732f3e63
 F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
 F src/os_kv.c 0e59600d25b72034c7666b8b7dcc527f039b5d9c16f24a7eca4c08c66f63c364
 F src/os_setup.h 6011ad7af5db4e05155f385eb3a9b4470688de6f65d6166b8956e58a3d872107
-F src/os_unix.c fc309252d6c86d7ae32e25d6413249789428aab600ffa9db050532bbe3a92ce2
+F src/os_unix.c 2d16b0e0186805306680cfad36f1efd2909683cdabd0812f0460833b24e0e66d
 F src/os_win.c 295fe45f18bd86f2477f4cd79f3377c6f883ceb941b1f46808665c73747f2345
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
 F src/pager.c d3122cf67f327f1e2df12d06236a3473a8099542071e257067552f42917f172d
@@ -641,7 +641,7 @@ F src/resolve.c efea4e5fbecfd6d0a9071b0be0d952620991673391b6ffaaf4c277b0bb674633
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
 F src/select.c 9886d6669f5787471aab6ae52af76fad90b53edb1c218fc9ed9d953363bc5184
 F src/shell.c.in f5b696b44319a7c820b1b2922ce8d34fdf330337beaa6e87c0fd85c5c92bcd34
-F src/sqlite.h.in 1d18494193ea4772a4a372e05f48d3ef0a14534bc2e1c88b942b89dcd9b14e4b
+F src/sqlite.h.in 5c27883b53c95c7b44ac3e63378d11fe50f18ad0ec975ae570bf2b01322438b0
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h c4b9fa7a7e2bcdf850cfeb4b8a91d5ec47b7a00033bc996fd2ee96cbf2741f5f
 F src/sqliteInt.h 1a2cec0f7682da69975eb203fef2058949051ff500445b997d8047cbd8813315
@@ -2057,11 +2057,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 2e783670e10b59e67c14b0db7f4803b41790cc7730de221d54fa2d4483cfba33
-R 15320a286fec35f9e29ba0e0afc5c3c6
-T *branch * wasi-patches
-T *sym-wasi-patches *
-T -sym-trunk * Cancelled\sby\sbranch.
+P 19c04d71bf0f2f44d5a03288cbea3f63cf4eae2fa018ac6be4ae49a321e2b2f3
+R ed76f6c019da486b38eceba46ef5c9a9
 U stephan
-Z 0b7069cc0349cc87f94f97d371c39591
+Z 8a0ad9bf871d09c041e33a1999bb3238
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-19c04d71bf0f2f44d5a03288cbea3f63cf4eae2fa018ac6be4ae49a321e2b2f3
+80ff026fb4b2203eea53d4930c1e9bb138db951fb408739c7d5c776fb397b665

src/os_unix.c

@@ -95,7 +95,8 @@
 #include <time.h>
 #include <sys/time.h>    /* amalgamator: keep */
 #include <errno.h>
-#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
+#if (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0) \
+  && !defined(SQLITE_WASI)
 # include <sys/mman.h>
 #endif
 
@@ -190,6 +191,8 @@
 #ifdef SQLITE_WASI
 # undef HAVE_FCHMOD
 # undef HAVE_FCHOWN
+# undef HAVE_MREMAP
+# define HAVE_MREMAP 0
 # ifndef SQLITE_DEFAULT_UNIX_VFS
 #  define SQLITE_DEFAULT_UNIX_VFS "unix-dotfile"
    /* ^^^ should SQLITE_DEFAULT_UNIX_VFS be "unix-none"? */
@@ -214,9 +217,13 @@
 # endif
 #endif /* SQLITE_WASI */
 
+#ifdef SQLITE_WASI
+# define osGetpid(X) 1
+#else
 /* Always cast the getpid() return type for compatibility with
 ** kernel modules in VxWorks. */
-#define osGetpid(X) (pid_t)getpid()
+# define osGetpid(X) (pid_t)getpid()
+#endif
 
 /*
 ** Only set the lastErrno if the error code is a real error and not 
@@ -528,14 +535,16 @@ static struct unix_syscall {
 #endif
 #define osGeteuid   ((uid_t(*)(void))aSyscall[21].pCurrent)
 
-#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
+#if (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0) \
+  && !defined(SQLITE_WASI)
   { "mmap",         (sqlite3_syscall_ptr)mmap,            0 },
 #else
   { "mmap",         (sqlite3_syscall_ptr)0,               0 },
 #endif
 #define osMmap ((void*(*)(void*,size_t,int,int,int,off_t))aSyscall[22].pCurrent)
 
-#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
+#if (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0) \
+  && !defined(SQLITE_WASI)
   { "munmap",       (sqlite3_syscall_ptr)munmap,          0 },
 #else
   { "munmap",       (sqlite3_syscall_ptr)0,               0 },

src/sqlite.h.in

@@ -10473,9 +10473,10 @@ int sqlite3_deserialize(
 #endif
 
 #if defined(__wasi__) || defined(WASM_WASI)
-# ifndef SQLITE_WASI
-#  define SQLITE_WASI
-# endif
+# undef SQLITE_WASI
+# define SQLITE_WASI 1
+# undef SQLITE_OMIT_WAL
+# define SQLITE_OMIT_WAL 1/* because it requires shared memory APIs */
 #endif
 
 #ifdef __cplusplus