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Merge pull request #8483 from opensourcerouting/asan-fix

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lib: disable ASAN redzone around xref_p/xref_array
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Quentin Young 2021-04-15 20:46:35 +00:00 committed by GitHub
commit dc92ca52c5
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1 changed files with 15 additions and 3 deletions
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18
lib/xref.h
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@ -137,6 +137,19 @@ extern void xref_gcc_workaround(const struct xref *xref);
extern const struct xref * const __start_xref_array[1] DSO_LOCAL;
extern const struct xref * const __stop_xref_array[1] DSO_LOCAL;
#if defined(__has_feature)
#if __has_feature(address_sanitizer)
/* no redzone around each of the xref_p please, we're building an array out
* of variables here. kinda breaks things if there's redzones between each
* array item.
*/
#define xref_array_attr used, section("xref_array"), no_sanitize("address")
#endif
#endif
#ifndef xref_array_attr
#define xref_array_attr used, section("xref_array")
#endif
/* this macro is invoked once for each standalone DSO through
* FRR_MODULE_SETUP \
* }-> FRR_COREMOD_SETUP -> XREF_SETUP
@ -151,8 +164,7 @@ extern const struct xref * const __stop_xref_array[1] DSO_LOCAL;
/* .func = */ "dummy", \
}; \
static const struct xref * const _dummy_xref_p \
__attribute__((used, section("xref_array"))) \
= &_dummy_xref; \
__attribute__((xref_array_attr)) = &_dummy_xref; \
static void __attribute__((used, _CONSTRUCTOR(1100))) \
_xref_init(void) { \
static struct xref_block _xref_block = { \
@ -225,7 +237,7 @@ extern const struct xref * const __stop_xref_array[1] DSO_LOCAL;
#if defined(__clang__) || !defined(__cplusplus)
#define XREF_LINK(dst) \
static const struct xref * const NAMECTR(xref_p_) \
__attribute__((used, section("xref_array"))) \
__attribute__((xref_array_attr)) \
= &(dst) \
/* end */