diff options
| author | Abseil Team <absl-team@google.com> | 2019-03-06T19·36-0800 |
|---|---|---|
| committer | Derek Mauro <dmauro@google.com> | 2019-03-06T19·49-0500 |
| commit | febc5ee6a92d0eb7dac1fceaa6c648cf6521b4dc (patch) | |
| tree | fcca391395791680a80a559f7efd9c47da6ff305 /absl/debugging/symbolize_elf.inc | |
| parent | 9fdf5e5b805412cb2a2e624d3e9a11588120465f (diff) | |
Export of internal Abseil changes.
-- f9f068aa8a260dc576398e47b8e4540902e41358 by Derek Mauro <dmauro@google.com>: Fix test string with embedded NUL. Currently parses as octal. PiperOrigin-RevId: 237088193 -- d271ffdd3f450f817f6d30e98ff39d439aaf3a98 by Abseil Team <absl-team@google.com>: Make symbolizer examine any mapping with read+exec permission regardless of 'w' bit. PiperOrigin-RevId: 237056461 -- af315f8306d36a7367a452fd0b58cafdbf20719d by Abseil Team <absl-team@google.com>: Switch comments referencing base:: CondVar and Mutex to absl::. PiperOrigin-RevId: 236917884 -- c624d5d1c0bdb917bff5e651ba40599472f84e0e by Gennadiy Rozental <rogeeff@google.com>: Internal change PiperOrigin-RevId: 236898300 -- 3cdc82429af964846d1152f49148abc61d196a4b by Samuel Benzaquen <sbenza@google.com>: Make the `long double` overload if AbslHashValue a template to avoid invalid conversions with implicit operators. This overload was never meant to capture anything other than `long double` and any current caller to it that wasn't a `long double` is potentially a bug. In particular, any type with an implicit `bool` conversion is calling this overload instead of trying to find a hash<> specialization, thus causing pretty bad hash behavior. PiperOrigin-RevId: 236877073 GitOrigin-RevId: f9f068aa8a260dc576398e47b8e4540902e41358 Change-Id: If9cc008dd814f0ca06ed881f612c06575f1f7137
Diffstat (limited to 'absl/debugging/symbolize_elf.inc')
| -rw-r--r-- | absl/debugging/symbolize_elf.inc | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/absl/debugging/symbolize_elf.inc b/absl/debugging/symbolize_elf.inc index 97d767abf11d..5b16bb8b08aa 100644 --- a/absl/debugging/symbolize_elf.inc +++ b/absl/debugging/symbolize_elf.inc @@ -925,6 +925,14 @@ static const char *GetHex(const char *start, const char *end, return p; } +// Normally we are only interested in "r?x" maps. +// On the PowerPC, function pointers point to descriptors in the .opd +// section. The descriptors themselves are not executable code, so +// we need to relax the check below to "r??". +static bool ShouldUseMapping(const char *const flags) { + return flags[0] == 'r' && (kPlatformUsesOPDSections || flags[2] == 'x'); +} + // Read /proc/self/maps and run "callback" for each mmapped file found. If // "callback" returns false, stop scanning and return true. Else continue // scanning /proc/self/maps. Return true if no parse error is found. @@ -994,12 +1002,8 @@ static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap( return false; } - // Check flags. Normally we are only interested in "r-x" maps. On - // the PowerPC, function pointers point to descriptors in the .opd - // section. The descriptors themselves are not executable code. So - // we need to relax the check below to "r**". - if (memcmp(flags_start, "r-x", 3) != 0 && // Not a "r-x" map. - !(kPlatformUsesOPDSections && flags_start[0] == 'r')) { + // Check flags. + if (!ShouldUseMapping(flags_start)) { continue; // We skip this map. } ++cursor; // Skip ' '. |