Export of internal Abseil changes
-- d6748c733a70cd74ad9b76a0c9cd6b3fe2cecacf by Xiaoyi Zhang <zhangxy@google.com>: Remove empty block, to address alerts reported in https://github.com/abseil/abseil-cpp/issues/368. PiperOrigin-RevId: 265099887 -- 232e2036b5668d6d1296b881f9347756d84541ee by Derek Mauro <dmauro@google.com>: Make the Linux Bazel CI scripts test with the exception mode explicitly set. PiperOrigin-RevId: 265092105 -- 942a40696c2c9b833be03e92d22a6ede7bccb6d4 by Xiaoyi Zhang <zhangxy@google.com>: Import https://github.com/abseil/abseil-cpp/pull/372. Suppress the unused variable warning on GCC, i.e. "-Wunused-variable". PiperOrigin-RevId: 265063925 -- 7ef90796b52cbdc260afc77cf47206f9356471d0 by Xiaoyi Zhang <zhangxy@google.com>: Add quotes to `ABSL_COMMON_INCLUDE_DIRS` since it's a list and may contain a `;`. This addresses https://github.com/abseil/abseil-cpp/issues/373. PiperOrigin-RevId: 265059077 -- 43f3ae742e00b83672ad6c5bc5b17fdb8f9fe6fe by Gennadiy Rozental <rogeeff@google.com>: Internal re-organization PiperOrigin-RevId: 264913945 -- 6a2adf9c08ee1d98cc6b2855a676345c6495294a by Andy Soffer <asoffer@google.com>: Publicly expose type names for uniform interval tags as in, for example, absl::IntervalClosedClosedTag, and add equality comparison operators. PiperOrigin-RevId: 264861162 -- 3c90c6e05fd61d56b419cd2d39dab8f17b8711b8 by Abseil Team <absl-team@google.com>: Add validity check on returned frame pointer. PiperOrigin-RevId: 264858823 -- 2db87e0cfa0c6bea7ba81684b834cb8a73b7d748 by Gennadiy Rozental <rogeeff@google.com>: Add MUST_USE_RESULT attribute to absl::GetFlag to prevent accidental misuse. PiperOrigin-RevId: 264782762 GitOrigin-RevId: d6748c733a70cd74ad9b76a0c9cd6b3fe2cecacf Change-Id: I169e9c5358e4f63000c1255e806d26b8afecf5ff
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24 changed files with 550 additions and 393 deletions
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@ -36,6 +36,8 @@
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#include "absl/base/internal/raw_logging.h"
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using absl::debugging_internal::AddressIsReadable;
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#if defined(__linux__) && defined(__i386__)
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// Count "push %reg" instructions in VDSO __kernel_vsyscall(),
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// preceeding "syscall" or "sysenter".
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@ -81,7 +83,7 @@ static int CountPushInstructions(const unsigned char *const addr) {
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// "mov reg,reg"
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if (addr[i + 1] == 0xE5) {
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// Found "mov %esp,%ebp".
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return 0;
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return 0;
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}
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++i; // Skip register encoding byte.
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} else if (addr[i] == 0x0F &&
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@ -222,7 +224,7 @@ static void **NextStackFrame(void **old_fp, const void *uc) {
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// "double fault" in case we hit the first fault due to e.g. stack
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// corruption.
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void *const reg_esp2 = reg_esp[num_push_instructions - 1];
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if (absl::debugging_internal::AddressIsReadable(reg_esp2)) {
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if (AddressIsReadable(reg_esp2)) {
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// Alleged %esp is readable, use it for further unwinding.
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new_fp = reinterpret_cast<void **>(reg_esp2);
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}
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@ -274,7 +276,7 @@ static void **NextStackFrame(void **old_fp, const void *uc) {
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// Note: NextStackFrame<false>() is only called while the program
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// is already on its last leg, so it's ok to be slow here.
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if (!absl::debugging_internal::AddressIsReadable(new_fp)) {
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if (!AddressIsReadable(new_fp)) {
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return nullptr;
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}
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}
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