[compiler-rt] dd66aaf - [sanitizer] Allow to override GetDTLSRange (#108348)
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llvm-commits at lists.llvm.org
Thu Sep 12 13:38:57 PDT 2024
Author: Vitaly Buka
Date: 2024-09-12T13:38:53-07:00
New Revision: dd66aaf85a2258324851ac19eb08094928ac1eac
URL: https://github.com/llvm/llvm-project/commit/dd66aaf85a2258324851ac19eb08094928ac1eac
DIFF: https://github.com/llvm/llvm-project/commit/dd66aaf85a2258324851ac19eb08094928ac1eac.diff
LOG: [sanitizer] Allow to override GetDTLSRange (#108348)
And rename it into __sanitizer_get_dtls_size.
The test will be in a separate patch, as I
expected reverts of the test.
Added:
Modified:
compiler-rt/lib/sanitizer_common/sanitizer_common_interface.inc
compiler-rt/lib/sanitizer_common/sanitizer_interface_internal.h
compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
compiler-rt/lib/sanitizer_common/weak_symbols.txt
Removed:
################################################################################
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interface.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interface.inc
index 91be9e9dcc4551..66744aa021e62b 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interface.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interface.inc
@@ -22,6 +22,7 @@ INTERFACE_FUNCTION(__sanitizer_verify_double_ended_contiguous_container)
INTERFACE_WEAK_FUNCTION(__sanitizer_on_print)
INTERFACE_WEAK_FUNCTION(__sanitizer_report_error_summary)
INTERFACE_WEAK_FUNCTION(__sanitizer_sandbox_on_notify)
+INTERFACE_WEAK_FUNCTION(__sanitizer_get_dtls_size)
// Sanitizer weak hooks
INTERFACE_WEAK_FUNCTION(__sanitizer_weak_hook_memcmp)
INTERFACE_WEAK_FUNCTION(__sanitizer_weak_hook_strcmp)
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_interface_internal.h b/compiler-rt/lib/sanitizer_common/sanitizer_interface_internal.h
index cd0d45e2f3fab1..c424ab1cecf94f 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_interface_internal.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_interface_internal.h
@@ -49,6 +49,11 @@ __sanitizer_sandbox_on_notify(__sanitizer_sandbox_arguments *args);
SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void
__sanitizer_report_error_summary(const char *error_summary);
+// Returns size of dynamically allocated block. This function can be overridden
+// by the client.
+SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE __sanitizer::uptr
+__sanitizer_get_dtls_size(const void *tls_begin);
+
SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_dump();
SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_dump_coverage(
const __sanitizer::uptr *pcs, const __sanitizer::uptr len);
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
index 17b9ff4aa6c40b..5e9a78706bf24d 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp
@@ -110,14 +110,15 @@ SANITIZER_WEAK_ATTRIBUTE
const void *__sanitizer_get_allocated_begin(const void *p);
}
-static uptr GetDTLSRange(uptr tls_beg) {
- const void *start = __sanitizer_get_allocated_begin((void *)tls_beg);
+SANITIZER_INTERFACE_WEAK_DEF(uptr, __sanitizer_get_dtls_size,
+ const void *tls_begin) {
+ const void *start = __sanitizer_get_allocated_begin(tls_begin);
if (!start)
return 0;
- CHECK_EQ(start, (void *)tls_beg);
+ CHECK_EQ(start, tls_begin);
uptr tls_size = __sanitizer_get_allocated_size(start);
VReport(2, "__tls_get_addr: glibc DTLS suspected; tls={%p,0x%zx}\n",
- (void *)tls_beg, tls_size);
+ tls_begin, tls_size);
return tls_size;
}
@@ -143,8 +144,8 @@ DTLS::DTV *DTLS_on_tls_get_addr(void *arg_void, void *res,
VReport(2, "__tls_get_addr: static tls: %p\n", (void *)tls_beg);
tls_size = 0;
} else {
- tls_size = GetDTLSRange(tls_beg);
- if (tls_size) {
+ tls_size = __sanitizer_get_dtls_size(reinterpret_cast<void *>(tls_beg));
+ if (!tls_size) {
VReport(2, "__tls_get_addr: Can't guess glibc version\n");
// This may happen inside the DTOR of main thread, so just ignore it.
}
@@ -162,6 +163,9 @@ bool DTLSInDestruction(DTLS *dtls) {
}
#else
+SANITIZER_INTERFACE_WEAK_DEF(uptr, __sanitizer_get_dtls_size, const void *) {
+ return 0;
+}
DTLS::DTV *DTLS_on_tls_get_addr(void *arg, void *res,
unsigned long, unsigned long) { return 0; }
DTLS *DTLS_Get() { return 0; }
diff --git a/compiler-rt/lib/sanitizer_common/weak_symbols.txt b/compiler-rt/lib/sanitizer_common/weak_symbols.txt
index 1eb1ce8d6b9c55..77e7b5d9f702e2 100644
--- a/compiler-rt/lib/sanitizer_common/weak_symbols.txt
+++ b/compiler-rt/lib/sanitizer_common/weak_symbols.txt
@@ -1,4 +1,5 @@
___sanitizer_free_hook
+___sanitizer_get_dtls_size
___sanitizer_malloc_hook
___sanitizer_report_error_summary
___sanitizer_sandbox_on_notify
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