diff options
Diffstat (limited to 'system/gcc/341-gccgo-libucontext-stack.patch')
| -rw-r--r-- | system/gcc/341-gccgo-libucontext-stack.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/system/gcc/341-gccgo-libucontext-stack.patch b/system/gcc/341-gccgo-libucontext-stack.patch new file mode 100644 index 000000000..cc88bda5a --- /dev/null +++ b/system/gcc/341-gccgo-libucontext-stack.patch @@ -0,0 +1,42 @@ +Similar to Solaris, libucontext does not clear the stack below makecontext. +This causes the Go frontend to sometimes go below the stack. + +On 32-bit Arm systems, this resulted in #832. It is likely, though not known, +that this could have caused other issues we've seen in gccgo as well. + +Additionally, since we strip libgo.so, filename is always NULL. This caused +the unwinder to continue through runtime_mstart which caused the same issue. +--- gcc-8.5.0/libgo/runtime/go-callers.c.old 2023-01-01 17:56:27.302982459 -0600 ++++ gcc-8.5.0/libgo/runtime/go-callers.c 2023-01-01 17:58:00.612903483 -0600 +@@ -165,26 +165,11 @@ + if (function != NULL) + { +- if (__builtin_strcmp (function, "makecontext") == 0) ++ if (__builtin_strcmp (function, "makecontext") == 0 ++ || __builtin_strcmp (function, "libucontext_makecontext") == 0 ++ || __builtin_strcmp (function, "runtime_mstart") == 0 ++ || __builtin_strcmp (function, "runtime.kickoff") == 0 ++ || __builtin_strcmp (function, "runtime.main") == 0) + return 1; +- if (filename != NULL) +- { +- const char *p; +- +- p = strrchr (filename, '/'); +- if (p == NULL) +- p = filename; +- if (__builtin_strcmp (p, "/proc.c") == 0) +- { +- if (__builtin_strcmp (function, "runtime_mstart") == 0) +- return 1; +- } +- else if (__builtin_strcmp (p, "/proc.go") == 0) +- { +- if (__builtin_strcmp (function, "runtime.kickoff") == 0 +- || __builtin_strcmp (function, "runtime.main") == 0) +- return 1; +- } +- } + } + + return arg->index >= arg->max; |