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[PULL,04/10] tcg: Increase the static number of temporaries

Message ID 20210123185020.1766324-5-richard.henderson@linaro.org (mailing list archive)
State New, archived
Headers show
Series [PULL,01/10] tcg: update the cpu running flag in cpu_exec_step_atomic | expand

Commit Message

Richard Henderson Jan. 23, 2021, 6:50 p.m. UTC 
This isn't a total or permanent solution to the problem of running
out of temporaries, but it puts off the issue for a bit.

Make the assert in tcg_temp_alloc unconditional.  If we do run out
of temps, this can fail much later as a weird SIGSEGV, due to the
buffer overrun of the temp array.

Remove the inlines from tcg_temp_alloc and tcg_global_alloc.

Buglink: https://bugs.launchpad.net/bugs/1912065
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/tcg/tcg.h | 2 +-
 tcg/tcg.c         | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index c5a9d65d5f..0187de1352 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -275,7 +275,7 @@  typedef struct TCGPool {
 
 #define TCG_POOL_CHUNK_SIZE 32768
 
-#define TCG_MAX_TEMPS 512
+#define TCG_MAX_TEMPS 1024
 #define TCG_MAX_INSNS 512
 
 /* when the size of the arguments of a called function is smaller than
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 8f8badb61c..5110f6f39c 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1204,14 +1204,14 @@  void tcg_func_start(TCGContext *s)
     QSIMPLEQ_INIT(&s->labels);
 }
 
-static inline TCGTemp *tcg_temp_alloc(TCGContext *s)
+static TCGTemp *tcg_temp_alloc(TCGContext *s)
 {
     int n = s->nb_temps++;
-    tcg_debug_assert(n < TCG_MAX_TEMPS);
+    g_assert(n < TCG_MAX_TEMPS);
     return memset(&s->temps[n], 0, sizeof(TCGTemp));
 }
 
-static inline TCGTemp *tcg_global_alloc(TCGContext *s)
+static TCGTemp *tcg_global_alloc(TCGContext *s)
 {
     TCGTemp *ts;