@@ -59,6 +59,7 @@
#include "sysemu/cpus.h"
#include "sysemu/cpu-timers.h"
#include "sysemu/tcg.h"
+#include "qapi/error.h"
/* #define DEBUG_TB_INVALIDATE */
/* #define DEBUG_TB_FLUSH */
@@ -973,7 +974,7 @@ static void page_lock_pair(PageDesc **ret_p1, tb_page_addr_t phys1,
(DEFAULT_CODE_GEN_BUFFER_SIZE_1 < MAX_CODE_GEN_BUFFER_SIZE \
? DEFAULT_CODE_GEN_BUFFER_SIZE_1 : MAX_CODE_GEN_BUFFER_SIZE)
-static inline size_t size_code_gen_buffer(size_t tb_size)
+static size_t size_code_gen_buffer(size_t tb_size)
{
/* Size the buffer. */
if (tb_size == 0) {
@@ -1024,7 +1025,7 @@ static inline void *split_cross_256mb(void *buf1, size_t size1)
static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE]
__attribute__((aligned(CODE_GEN_ALIGN)));
-static inline void *alloc_code_gen_buffer(void)
+static bool alloc_code_gen_buffer(size_t tb_size, Error **errp)
{
void *buf = static_code_gen_buffer;
void *end = static_code_gen_buffer + sizeof(static_code_gen_buffer);
@@ -1037,9 +1038,8 @@ static inline void *alloc_code_gen_buffer(void)
size = end - buf;
/* Honor a command-line option limiting the size of the buffer. */
- if (size > tcg_ctx->code_gen_buffer_size) {
- size = QEMU_ALIGN_DOWN(tcg_ctx->code_gen_buffer_size,
- qemu_real_host_page_size);
+ if (size > tb_size) {
+ size = QEMU_ALIGN_DOWN(tb_size, qemu_real_host_page_size);
}
tcg_ctx->code_gen_buffer_size = size;
@@ -1051,31 +1051,43 @@ static inline void *alloc_code_gen_buffer(void)
#endif
if (qemu_mprotect_rwx(buf, size)) {
- abort();
+ error_setg_errno(errp, errno, "mprotect of jit buffer");
+ return false;
}
qemu_madvise(buf, size, QEMU_MADV_HUGEPAGE);
- return buf;
+ tcg_ctx->code_gen_buffer = buf;
+ return true;
}
#elif defined(_WIN32)
-static inline void *alloc_code_gen_buffer(void)
+static bool alloc_code_gen_buffer(size_t size, Error **errp)
{
- size_t size = tcg_ctx->code_gen_buffer_size;
- return VirtualAlloc(NULL, size, MEM_RESERVE | MEM_COMMIT,
- PAGE_EXECUTE_READWRITE);
+ void *buf = VirtualAlloc(NULL, size, MEM_RESERVE | MEM_COMMIT,
+ PAGE_EXECUTE_READWRITE);
+ if (buf == NULL) {
+ error_setg_win32(errp, GetLastError(),
+ "allocate %zu bytes for jit buffer", size);
+ return false;
+ }
+
+ tcg_ctx->code_gen_buffer = buf;
+ tcg_ctx->code_gen_buffer_size = size;
+ return true;
}
#else
-static inline void *alloc_code_gen_buffer(void)
+static bool alloc_code_gen_buffer(size_t size, Error **errp)
{
int prot = PROT_WRITE | PROT_READ | PROT_EXEC;
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
- size_t size = tcg_ctx->code_gen_buffer_size;
void *buf;
buf = mmap(NULL, size, prot, flags, -1, 0);
if (buf == MAP_FAILED) {
- return NULL;
+ error_setg_errno(errp, errno,
+ "allocate %zu bytes for jit buffer", size);
+ return false;
}
+ tcg_ctx->code_gen_buffer_size = size;
#ifdef __mips__
if (cross_256mb(buf, size)) {
@@ -1114,20 +1126,11 @@ static inline void *alloc_code_gen_buffer(void)
/* Request large pages for the buffer. */
qemu_madvise(buf, size, QEMU_MADV_HUGEPAGE);
- return buf;
+ tcg_ctx->code_gen_buffer = buf;
+ return true;
}
#endif /* USE_STATIC_CODE_GEN_BUFFER, WIN32, POSIX */
-static inline void code_gen_alloc(size_t tb_size)
-{
- tcg_ctx->code_gen_buffer_size = size_code_gen_buffer(tb_size);
- tcg_ctx->code_gen_buffer = alloc_code_gen_buffer();
- if (tcg_ctx->code_gen_buffer == NULL) {
- fprintf(stderr, "Could not allocate dynamic translator buffer\n");
- exit(1);
- }
-}
-
static bool tb_cmp(const void *ap, const void *bp)
{
const TranslationBlock *a = ap;
@@ -1154,11 +1157,16 @@ static void tb_htable_init(void)
size. */
void tcg_exec_init(unsigned long tb_size)
{
+ bool ok;
+
tcg_allowed = true;
cpu_gen_init();
page_init();
tb_htable_init();
- code_gen_alloc(tb_size);
+
+ ok = alloc_code_gen_buffer(size_code_gen_buffer(tb_size), &error_fatal);
+ assert(ok);
+
#if defined(CONFIG_SOFTMMU)
/* There's no guest base to take into account, so go ahead and
initialize the prologue now. */
Report better error messages than just "could not allocate". Let alloc_code_gen_buffer set ctx->code_gen_buffer_size and ctx->code_gen_buffer, and simply return bool. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- accel/tcg/translate-all.c | 60 ++++++++++++++++++++++----------------- 1 file changed, 34 insertions(+), 26 deletions(-)