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Export of internal Abseil changes.

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--
f9f068aa8a260dc576398e47b8e4540902e41358 by Derek Mauro <dmauro@google.com>:

Fix test string with embedded NUL. Currently parses as octal.

PiperOrigin-RevId: 237088193

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d271ffdd3f450f817f6d30e98ff39d439aaf3a98 by Abseil Team <absl-team@google.com>:

Make symbolizer examine any mapping with read+exec permission regardless of 'w' bit.

PiperOrigin-RevId: 237056461

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af315f8306d36a7367a452fd0b58cafdbf20719d by Abseil Team <absl-team@google.com>:

Switch comments referencing base:: CondVar and Mutex to absl::.

PiperOrigin-RevId: 236917884

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c624d5d1c0bdb917bff5e651ba40599472f84e0e by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 236898300

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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
This commit is contained in:
Abseil Team 2019-03-06 11:36:55 -08:00 • committed by Derek Mauro
parent 9fdf5e5b80
commit febc5ee6a9
70 changed files with 483 additions and 410 deletions
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16
absl/debugging/symbolize_elf.inc
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@ -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 ' '.