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authorSverker Eriksson <[email protected]>2017-10-19 20:44:54 +0200
committerSverker Eriksson <[email protected]>2017-11-03 16:04:18 +0100
commit31e6c79f956f71e80d8f6be48e5ab8df87f2b85c (patch)
tree778c617c34071627d72d4c73a3af81cb6df40293 /erts
parent919ef5de2858e606d4a9be3e0e995b0802c76e33 (diff)
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Prevent hipe_bs_validate_unicode from doing GC
Fix for x86_64 only. The calling native code can not handle a GC as it has a raw pointer where to write the binary data. If a GC happens the data (utf32) will be written to the old deallocated heap.
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/hipe/hipe_amd64_bifs.m437
-rw-r--r--erts/emulator/hipe/hipe_bif_list.m44
2 files changed, 41 insertions, 0 deletions
diff --git a/erts/emulator/hipe/hipe_amd64_bifs.m4 b/erts/emulator/hipe/hipe_amd64_bifs.m4
index dca3887564..aff10f1528 100644
--- a/erts/emulator/hipe/hipe_amd64_bifs.m4
+++ b/erts/emulator/hipe/hipe_amd64_bifs.m4
@@ -463,6 +463,43 @@ ASYM($1):
#endif')
/*
+ * nogc_bif_interface_1(nbif_name, cbif_name)
+ *
+ * Generate native interface for a bif with implicit P
+ * The bif can fail but cannot do GC.
+ */
+
+define(nogc_bif_interface_1,
+`
+#ifndef HAVE_$1
+#`define' HAVE_$1
+ TEXT
+ .align 4
+ GLOBAL(ASYM($1))
+ASYM($1):
+ /* set up the parameters */
+ movq P, %rdi
+ NBIF_ARG(%rsi,1,0)
+
+ /* make the call on the C stack */
+ SWITCH_ERLANG_TO_C
+ pushq %rsi
+ movq %rsp, %rsi /* Eterm* BIF__ARGS */
+ sub $(8), %rsp /* stack frame 16-byte alignment */
+ CALL_BIF($2)
+ add $(1*8 + 8), %rsp
+ SWITCH_C_TO_ERLANG
+
+ /* throw exception if failure, otherwise return */
+ TEST_GOT_EXN
+ jz nbif_1_simple_exception
+ NBIF_RET(1)
+ SET_SIZE(ASYM($1))
+ TYPE_FUNCTION(ASYM($1))
+#endif')
+
+
+/*
* noproc_primop_interface_0(nbif_name, cbif_name)
* noproc_primop_interface_1(nbif_name, cbif_name)
* noproc_primop_interface_2(nbif_name, cbif_name)
diff --git a/erts/emulator/hipe/hipe_bif_list.m4 b/erts/emulator/hipe/hipe_bif_list.m4
index f034c4700c..ada3ab2c83 100644
--- a/erts/emulator/hipe/hipe_bif_list.m4
+++ b/erts/emulator/hipe/hipe_bif_list.m4
@@ -247,7 +247,11 @@ nofail_primop_interface_3(nbif_bs_get_float_2, erts_bs_get_float_2)
standard_bif_interface_3(nbif_bs_put_utf8, hipe_bs_put_utf8)
standard_bif_interface_3(nbif_bs_put_utf16be, hipe_bs_put_utf16be)
standard_bif_interface_3(nbif_bs_put_utf16le, hipe_bs_put_utf16le)
+ifdef(`nogc_bif_interface_1',`
+nogc_bif_interface_1(nbif_bs_validate_unicode, hipe_bs_validate_unicode)
+',`
standard_bif_interface_1(nbif_bs_validate_unicode, hipe_bs_validate_unicode)
+')
/*
* Bit-syntax primops without any P parameter.