Are .text sections shared between loaded executables?
When two instances of an executable are loaded, one after the other, and are running simultaneously, are the read-only .text sections shared between their address spaces, like a shared library? Wouldn't they always be the exact same? I am only referring to the executable's object file, (ie. the one with the main() function).
Is this behavior exhibited in Linux? If so, do other Unices do so as well?
If this is not done in Linux, would any benefit come from implementing executables that often run multiple instances in parallel as shared libraries, with the invoked executable simply calling a main function in the library?
kernel elf dynamic-loading
asked Dec 31 '18 at 3:28
novice
135
add a comment |
When two instances of an executable are loaded, one after the other, and are running simultaneously, are the read-only .text sections shared between their address spaces, like a shared library? Wouldn't they always be the exact same? I am only referring to the executable's object file, (ie. the one with the main() function).
Is this behavior exhibited in Linux? If so, do other Unices do so as well?
If this is not done in Linux, would any benefit come from implementing executables that often run multiple instances in parallel as shared libraries, with the invoked executable simply calling a main function in the library?
kernel elf dynamic-loading
asked Dec 31 '18 at 3:28
novice
135
Strictly speaking, it doesn't have to be shared. But in the real-life they are always shared because they're mmaping the same file region
– 炸鱼薯条德里克
Dec 31 '18 at 4:45
@炸鱼薯条德里克 Does the characteristic of mapping the same file region always lead to sharing in memory?
– novice
Jan 1 at 18:21
add a comment |
When two instances of an executable are loaded, one after the other, and are running simultaneously, are the read-only .text sections shared between their address spaces, like a shared library? Wouldn't they always be the exact same? I am only referring to the executable's object file, (ie. the one with the main() function).
Is this behavior exhibited in Linux? If so, do other Unices do so as well?
If this is not done in Linux, would any benefit come from implementing executables that often run multiple instances in parallel as shared libraries, with the invoked executable simply calling a main function in the library?
kernel elf dynamic-loading
asked Dec 31 '18 at 3:28
novice
135
When two instances of an executable are loaded, one after the other, and are running simultaneously, are the read-only .text sections shared between their address spaces, like a shared library? Wouldn't they always be the exact same? I am only referring to the executable's object file, (ie. the one with the main() function).
Is this behavior exhibited in Linux? If so, do other Unices do so as well?
If this is not done in Linux, would any benefit come from implementing executables that often run multiple instances in parallel as shared libraries, with the invoked executable simply calling a main function in the library?
kernel elf dynamic-loading
kernel elf dynamic-loading
asked Dec 31 '18 at 3:28
novice
135
asked Dec 31 '18 at 3:28
novice
135
edited 2 days ago
asked Dec 31 '18 at 3:28
novice
135
asked Dec 31 '18 at 3:28
novice
135
asked Dec 31 '18 at 3:28
novice
135
135
Strictly speaking, it doesn't have to be shared. But in the real-life they are always shared because they're mmaping the same file region
– 炸鱼薯条德里克
Dec 31 '18 at 4:45
@炸鱼薯条德里克 Does the characteristic of mapping the same file region always lead to sharing in memory?
– novice
Jan 1 at 18:21
add a comment |
Strictly speaking, it doesn't have to be shared. But in the real-life they are always shared because they're mmaping the same file region
– 炸鱼薯条德里克
Dec 31 '18 at 4:45
@炸鱼薯条德里克 Does the characteristic of mapping the same file region always lead to sharing in memory?
– novice
Jan 1 at 18:21
Strictly speaking, it doesn't have to be shared. But in the real-life they are always shared because they're mmaping the same file region
– 炸鱼薯条德里克
Dec 31 '18 at 4:45
Strictly speaking, it doesn't have to be shared. But in the real-life they are always shared because they're mmaping the same file region
– 炸鱼薯条德里克
Dec 31 '18 at 4:45
@炸鱼薯条德里克 Does the characteristic of mapping the same file region always lead to sharing in memory?
– novice
Jan 1 at 18:21
@炸鱼薯条德里克 Does the characteristic of mapping the same file region always lead to sharing in memory?
– novice
Jan 1 at 18:21
add a comment |
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Strictly speaking, it doesn't have to be shared. But in the real-life they are always shared because they're mmaping the same file region
– 炸鱼薯条德里克
Dec 31 '18 at 4:45
@炸鱼薯条德里克 Does the characteristic of mapping the same file region always lead to sharing in memory?
– novice
Jan 1 at 18:21